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Model 2281S-20-6 DC Power Supply and Battery Simulator Reference Manual

Section 2: General operation

077114601 / March 2019

2-5

Communication settings status indicator

Move the focus to the communication indicator using the navigation control and press the

ENTER

key

to see a list of present communications settings.

Figure 4: 2281S communication status indicator

Indicator

Meaning

Local

Instrument is controlled from the front panel.

GPIB

Instrument is communicating through a GPIB interface.

VXI-11

Instrument is communicating using VXI-11.

USBTMC

Instrument is communicating through a USB interface
(firmware version 1.05 and earlier, port number raw socket 5050; firmware version
1.06 and later, port number raw socket 5025).

WebPage

Instrument is communicating through a web page.

Instrument communication activity indicator

The activity indicator is located to the right of the communication settings status indicator. When the

instrument is communicating with a remote interface, the up and down arrows flash.

Figure 5: Instrument communication activity indicator

If a service request has been generated,

SRQ

is displayed to the right of the up and down arrows. You

can configure the instrument to generate a service request (SRQ) when one or more errors or

conditions occur. This indicator stays on until the serial poll byte is read or all the conditions that

caused SRQ are cleared.

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Summary of Contents for Keithley 2281 Series

Page 1: ...Reference Manual 077114601 March 2019 P077114601 077114601 Model 2281S 20 6 Precision DC Power Supply and Battery Simulator tek com keithley...

Page 2: ...DC Power Supply and Battery Simulator Reference Manual Model 2281S 20 6...

Page 3: ...prohibited These are the original instructions in English All Keithley Instruments product names are trademarks or registered trademarks of Keithley Instruments LLC Other brand names are trademarks or...

Page 4: ...d to mains These instruments will be marked as category II or higher Unless explicitly allowed in the specifications operating manual and instrument labels do not connect any instrument to mains Exerc...

Page 5: ...lains hazards that could damage the instrument Such damage may invalidate the warranty The CAUTION heading with the symbol in the user documentation explains hazards that could result in moderate or m...

Page 6: ...ator menu overview 2 42 Adjusting the backlight brightness and timer 2 51 Installing the system 2 52 Bumpers 2 52 Dimensions 2 53 Power the instrument on and off 2 58 Test connections 2 61 Front panel...

Page 7: ...System information 2 108 Instrument sounds 2 109 Resets 2 109 Reset the instrument 2 110 Reset default values 2 110 Functions and features 3 1 Instrument access 3 1 Changing the instrument access mode...

Page 8: ...Battery charging test 3 59 Generating and editing a battery model 3 60 ESR measurement 3 63 A H measurement 3 66 Capacitance measurement 3 69 Battery simulation 3 70 Battery simulation settings 3 70 S...

Page 9: ...quired 5 7 Set up remote communications 5 8 Device connections 5 8 Measure the fast current load changes 5 10 Battery test 5 13 Equipment required 5 13 Device connections 5 13 Test a battery and gener...

Page 10: ...38 BATTery n SIMulator CURRent 7 39 BATTery n SIMulator CURRent LIMit 7 39 BATTery n SIMulator CURRent PROTection LEVel 7 40 BATTery n SIMulator HV 7 41 BATTery n SIMulator LV 7 42 BATTery n SIMulator...

Page 11: ...n FORMat 7 77 CALCulate 1 function KMATh MBFactor 7 78 CALCulate 1 function KMATh MMFactor 7 79 CALCulate 1 function KMATh MUNits 7 80 CALCulate 1 function STATe 7 81 CALCulate2 DATA 7 82 CALCulate2 F...

Page 12: ...Tage SLEW FALLing 7 133 SOURce n LIST listNumber element 7 134 SOURce n LIST listNumber element APPend 7 135 SOURce n LIST listNumber element POINts 7 136 SOURce n LIST END ZERO 7 137 SOURce n LIST HT...

Page 13: ...NEW 7 173 SYSTem PASSword UNLock 7 174 SYSTem POSetup STATe 7 174 SYSTem PRESet 7 175 SYSTem RWLock 7 176 SYSTem TIME 7 176 SYSTem VERSion 7 177 TRACe subsystem 7 177 DATA n CLEar 7 177 DATA n CLEar...

Page 14: ...nse B 5 DC voltage readback accuracy without remote sense B 6 DC voltage line regulation without remote sense B 6 DC voltage load regulation without remote sense B 6 DC overvoltage protection B 7 Maxi...

Page 15: ...C 1 Environmental conditions C 1 Warmup period C 2 Line power C 2 Calibration considerations C 2 Calibration cycle C 2 Required equipment C 3 Characterization shunts C 4 Calibration connection C 6 Vol...

Page 16: ...us byte and service request D 7 Status Byte Register D 7 Service Request Enable Register D 8 Status register sets D 9 Register bit descriptions D 9 Event registers D 20 Event enable registers D 20 Con...

Page 17: ...ply it can conduct battery testing by charging and discharging the battery under test and creating a model for the battery The 2281S can also simulate batteries to facilitate tests conducted on the pr...

Page 18: ...site tek com keithley Product documentation and drivers The following documentation and drivers for the 2281S are available for download from the Keithley Instruments support website tek com support Q...

Page 19: ...ed accuracy and sensitivity Application examples Contains examples of several applications that you can use as a starting point for your own application Introduction to SCPI commands Describes how to...

Page 20: ...model based on battery test results Measure open circuit voltage and resistance As a battery simulator Simulate a real battery based on a battery model Dynamic and static simulation mode to simulate b...

Page 21: ...itch to 110 V Option A1 Universal Euro The factory sets the line voltage selector switch to 220 V Option A2 United Kingdom The factory sets the line voltage selector switch to 220 V Option A3 Australi...

Page 22: ...ble shielded premium IEEE 488 interface cables 4 m 13 ft 7007 4 Dual fixed rack mount kit for 2280S and 2281S instruments 4299 14 Model 2450 TLINK trigger link cable 131909200 Available services For t...

Page 23: ...ive humidity at up to 40 C and 5 to 60 relative humidity above 40 C at up to 70 C Pollution degree 2 Line fuse characteristics are shown in the following table Model 100 VAC 120 VAC source 220 VAC 240...

Page 24: ...tion 2 100 Saving setups 2 105 Using the event log 2 107 System information 2 108 Instrument sounds 2 109 Resets 2 109 Front panel overview The front panel of 2281S is shown below Descriptions of the...

Page 25: ...you can select it ENTER key Selects the highlighted choice or allows you to edit the selected field EXIT key Returns to the previous screen or closes a dialog box For example press the EXIT key when t...

Page 26: ...USB communications on page 2 88 Power module The power module contains the AC line receptacle the power line fuse and the line voltage selector switch For safety precautions and other details see Line...

Page 27: ...lies 20 V 6 ADC source Battery test Conducts battery charging and discharging tests to calculate the capacity and resistance of the battery and create a battery model Battery simulator Simulates a bat...

Page 28: ...interface firmware version 1 05 and earlier port number raw socket 5050 firmware version 1 06 and later port number raw socket 5025 WebPage Instrument is communicating through a web page Instrument co...

Page 29: ...e 6 Level trigger enabled indicator When a level trigger is enabled data is logged to the buffer when the triggering condition is met Buffer indicator The bar next to Buffer indicates how full the buf...

Page 30: ...ows the specified list number or recall settings Figure 8 List and recall settings indicator Error and event indicator Move the focus to the error and event indicator using navigation control and pres...

Page 31: ...UTPUT view area Indicator Status description Output status The instrument always has one of the following indicators visible OFF The output is turned off CV The output is turned on and the power suppl...

Page 32: ...cted For details see Status and error indicators on page 2 4 2 OUTPUT view area The green part of the home screen displays the value of the present outputs and status indicators 3 Setting area Shows t...

Page 33: ...e the voltage setting using the numerical keys soft keys and navigation control I Limit Configure the current setting using the numerical keys soft keys and navigation control Range Press the up arrow...

Page 34: ...old for overvoltage protection OCP Edit the current threshold for overcurrent protection VMAX Edit the maximum voltage setting value Resolution Specify the measurement resolution for the selected meas...

Page 35: ...key area 3 Setting Description List Configure the list function Enable Run a specified list On or Off Number Specify the list number The default setting for list number is Demo You can run a predefin...

Page 36: ...is on its status is indicated in this area as running or pause For more details see Status and error indicators on page 2 4 2 OUTPUT view area The green part of the home screen displays the value of...

Page 37: ...explained in the table To change a setting press the soft key to open a setting window After configuration close the window by pressing the ENTER or EXIT key Figure 15 Soft key area 1 for battery test...

Page 38: ...pacitance Script Specify whether to run a script you can select a specific index in the script to run how many measurement cycles to make and you can view the results in a table that can be saved to a...

Page 39: ...being discharged When the Status icon is filled with a lightning bolt symbol it indicates that the battery is being charged 2 OUTPUT view area This part of the screen displays the status of the batter...

Page 40: ...ator function Soft key area 1 contains the settings shown in the following figure and explained in the table To change a setting press the soft key to open a setting window After configuration close t...

Page 41: ...Discharging stops when the voltage reaches this value I Limit Set the maximum current value for discharging Capacity Set the battery capacity Next Switch to home screen 3 Soft key area 3 for the batt...

Page 42: ...f the main menu is shown in the figure below Figure 22 Power supply main menu The main menu is organized into submenus which are labeled in green across the top of the display The icons in each column...

Page 43: ...he rising rate for voltage source Slew Fall Set the falling rate for voltage source Delay Rise This menu option is only available if Output Delay is set to On View the delay time that the instrument w...

Page 44: ...ault settings before each specified point The default settings are 0 000 V 0 100 A 0 100 s Copy Copy the selected settings of the point and insert a new point with the same settings before each point...

Page 45: ...f measurement is active V I Concurrent measurement function The instrument measures voltage and current at the same time V Voltage measurement function The instrument only measures voltage I Current m...

Page 46: ...averaged when filtering is enabled The number of measurements can be 2 through 100 Window Filtering uses a window to control filter threshold When the input signal remains within the selected window m...

Page 47: ...o have the buffer stop collecting data Statistics Select statistics to apply to the readings in the buffer Available statistics Minimum Minimum value Maximum Maximum value Peak Peak Maximum value mini...

Page 48: ...lotted on the Y axis You can select Voltage Current or Both I Auto Adjust Enable or disable the automatic adjustment of the current scale and offset of the Y axis When automatic adjustment is disabled...

Page 49: ...this menu is read only Setting Description List type Shows the list type when the list function is enabled The 2281S supports the following types of lists Step One trigger signal outputs one list step...

Page 50: ...ils refer to Digital I O on page 3 22 Setting Description Line 1 Specify one of the following line modes for digital I O line 1 Trigger In Output HI Output LO Manual In Line 2 Specify one of the follo...

Page 51: ...ata buffer Current Level Set the value of the current that will trigger the data logging in the data buffer Voltage Direction If you set this as Rise the trigger will be activated when the voltage ris...

Page 52: ...System menu for the power supply function This menu allows you to configure general instrument operations from the 2281S front panel System Save Recall menu for the Power Supply Function This menu all...

Page 53: ...lt GPIB address is 5 You can set the address to any address from 1 to 30 if it is unique in the system This address cannot conflict with an address that is assigned to another instrument or to the GPI...

Page 54: ...he error beeper on or off System Password Change the remote connection or calibration passwords You need the remote connection password to open the LXI virtual front panel and send SCPI commands You n...

Page 55: ...than what is on the instrument If the version is older or at the same revision level no changes are made Previous Selecting this option returns the 2281S to a previous version of the firmware from a...

Page 56: ...mally around 1 A Source Protect menu for the battery test function This menu allows you to configure the protection settings Setting Description Overvoltage Protection Set the overvoltage protection l...

Page 57: ...t is supplied by 60 Hz power Measure Voc ESR menu for the battery test function This menu allows you to configure the Voc and ESR measurement settings to be used during the battery test It also allows...

Page 58: ...ettings that are available on these interactive screens Views Graph menu for the battery test function You can access this menu by pressing the MENU key moving focus to the Graph icon and pressing the...

Page 59: ...ttery under test Setting Description Model Choose and open a saved model for battery simulation Capacity Set the capacity of the battery Fine Coarse Choose the way the battery model is displayed Fine...

Page 60: ...tal I O on page 3 22 Setting Description Line 1 Specify one of the following line modes for digital I O line 1 Trigger In Output HI Output LO Manual In Line 2 Specify one of the following line modes f...

Page 61: ...ata buffer Current Level Set the value of the current that will trigger the data logging in the data buffer Voltage Direction If you set this as Rise the trigger will be activated when the voltage ris...

Page 62: ...reaches this value the digital I O pin which is set as Digital Out and HV action outputs a level signal Low Voltage Sets the low voltage LV value When the output voltage reaches this value the digita...

Page 63: ...can set the address to any address from 1 to 30 if it is unique in the system This address cannot conflict with an address that is assigned to another instrument or to the GPIB controller LAN settings...

Page 64: ...tem Password Change the remote connection or calibration passwords You need the remote connection password to open the LXI virtual front panel and send SCPI commands You need the calibration password...

Page 65: ...is on the instrument If the version is older or at the same revision level no changes are made Previous Selecting this option returns the 2281S to a previous version of the firmware from a file on a...

Page 66: ...the simulated battery will stay the same Voc Configure the initial battery voltage SOC Configure the initial battery capacity in percentage Full V Configure the end voltage value for charging The defa...

Page 67: ...e buffer to a USB flash drive Clear Buffer Clears the data in the buffer Views menu for the battery simulator function The menus organized under View in the main menu allow you to view the data plot s...

Page 68: ...key On the page displayed you can view the model of the battery under test Setting Description Model Choose and open a saved model for battery simulation Capacity Set the capacity of the battery Fine...

Page 69: ...gital I O on page 3 22 Setting Description Line 1 Specify one of the following line modes for digital I O line 1 Trigger In Output HI Output LO Manual In Line 2 Specify one of the following line modes...

Page 70: ...data buffer Current Level Set the value of the current that will trigger the data logging in the data buffer Voltage Direction If you set this as Rise the trigger will be activated when the voltage r...

Page 71: ...aches this value the digital I O pin which is set as Digital Out and HV action outputs a level signal Low Voltage Sets the low voltage LV value When the output voltage reaches this value the digital I...

Page 72: ...You can set the address to any address from 1 to 30 if it is unique in the system This address cannot conflict with an address that is assigned to another instrument or to the GPIB controller LAN set...

Page 73: ...tem Password Change the remote connection or calibration passwords You need the remote connection password to open the LXI virtual front panel and send SCPI commands You need the calibration password...

Page 74: ...the version you are loading is earlier than what is on the instrument If there are several versions on the USB flash drive that are older than what is on the instrument the newest one is selected Cali...

Page 75: ...ghtness Installing the system This section contains information on how to install your 2281S power supply Bumpers The 2281S has front and rear bumpers for using the instrument on a benchtop Removing b...

Page 76: ...he following figures show the mounting screw locations and the dimensions of the instrument with and without the bumpers The instrument weighs 10 67 kg 23 53 lb with the bumpers and 10 40 kg 22 95 lb...

Page 77: ...del 2281S 20 6 DC Power Supply and Battery Simulator Reference Manual 2 54 077114601 March 2019 The following figures show the dimensions when the bumpers are installed Figure 30 2281S front and rear...

Page 78: ...Model 2281S 20 6 DC Power Supply and Battery Simulator Reference Manual Section 2 General operation 077114601 March 2019 2 55 Figure 31 2281S top and side dimensions with bumpers...

Page 79: ...81S 20 6 DC Power Supply and Battery Simulator Reference Manual 2 56 077114601 March 2019 The following figures show the dimensions when the bumpers have been removed Figure 32 2281S front and rear pa...

Page 80: ...Model 2281S 20 6 DC Power Supply and Battery Simulator Reference Manual Section 2 General operation 077114601 March 2019 2 57 Figure 33 2281S top and side dimensions with bumpers removed...

Page 81: ...6 contains a separate protective earth safety ground wire for use with grounded outlets When proper connections are made the instrument chassis is connected to power line ground through the ground wir...

Page 82: ...nstrument on press the front panel POWER switch to place it in the on I position A status bar is displayed as the instrument powers up The home screen is displayed when power up is complete 3 To turn...

Page 83: ...r death never make or break connections to the 2281S while the instrument is powered on Turn off the equipment from the front panel or disconnect the main power cord from the rear of the 2281S before...

Page 84: ...ls to make connections to the device under test DUT You must use either the front or rear terminals You cannot use connections to both the front panel and rear panel for the same test setup you must c...

Page 85: ...t the outputs from the front panel Insert standard banana plugs into the front connectors as shown in location 1 Insert safety test leads into the front connectors as shown in location 1 For details s...

Page 86: ...utput low sense high and sense low terminals The rear output terminals accept wire sizes from AWG 20 to AWG 12 Two wire local sense connection You can connect a device to the instrument in a two wire...

Page 87: ...p in the leads between the power supply and the load The maximum voltage drop is 1 V per lead As shipped the sense terminals are connected to the output terminals by shorting jumpers Before connecting...

Page 88: ...st be twisted For more information refer to the following figure Figure 39 Four wire connection with twisted pair wires Make sure you make the connections correctly Incorrect connections between outpu...

Page 89: ...oltage setting Vclamp is introduced from a clamp circuit typically less than 7 V Without the clamp circuit the instrument could output its maximum voltage when the open lead occurs Example 1 Connect a...

Page 90: ...remote interface by sending the SYSTem ERRor command Reversed sense leads When the following connections occur the instrument generates a reversed sense leads error Sense HI is connected to Output LO...

Page 91: ...isplayed you can press the ENTER key to initiate the trigger model To clear an overprotection error using a SCPI command When an overprotection error occurs send the following command to clear the reg...

Page 92: ...t and supports IEEE Std 488 2 common commands and status model topology You can have up to 15 devices connected to a GPIB interface including the controller The maximum cable length is the lesser of e...

Page 93: ...PIB connector To allow many parallel connections to one instrument stack the connectors Each connector has two screws to ensure that connections remain secure The figure below shows a typical connecti...

Page 94: ...cable connector with the connector on the 2281S rear panel The location of the connector is shown in the following figure 2 Attach the connector Tighten the screws securely but do not overtighten them...

Page 95: ...turned on again To set the GPIB address from the front panel 1 Press the MENU key 2 Under System select Communication The SYSTEM COMMUNICATION window opens 3 Select the GPIB interface 4 Next to Addres...

Page 96: ...to one connection With most instruments a one to one connection is done only when you are connecting a single instrument to a single network interface card A one to one connection using a network cro...

Page 97: ...nstrumentation network However with a corporate network attached to the hub the instruments become part of the larger network Figure 48 One to many connection using a network hub or switch Two network...

Page 98: ...the Internet using appropriate security methods Data collection and distribution can be controlled from virtually any location Figure 50 Instrumentation connection to enterprise routers or servers Raw...

Page 99: ...y changes You can also check the settings with the SCPI command SYSTem COMMunication LAN CONFigure The 2281S powers up using the last remote interface used Set up automatic LAN configuration If you ar...

Page 100: ...ment when placing the instrument on a corporate network The instrument IP address has leading zeros but the computer IP address does not To set up manual IP address selection on the instrument 1 From...

Page 101: ...ore reconnecting the host computer to a corporate network Contact your system administrator for more information LAN status indicator When the LAN status indicator on the front panel of the instrument...

Page 102: ...8 in the browser address box 3 Press Enter on the computer keyboard to open the instrument web page 4 If a dialog box is displayed enter a user name and password The default is admin for both If the w...

Page 103: ...NS address can be changed through the web page of the instrument If you change the IP address through the web page the web page will try to redirect to the IP address that gets configured in the instr...

Page 104: ...bmit This is normal and does not indicate an error or failure of the operation If this occurs find the correct IP address and reopen the web page of the instrument to continue Change the web interface...

Page 105: ...he default password is admin 3 In the left upper corner of the virtual front panel select Operation The Snapshot and Fetch Data options are displayed Figure 54 2281S Virtual Front Panel 4 Select Snaps...

Page 106: ...dicating Copying completed 100 is displayed 5 Select OK 6 Paste the data into your report Control the instrument through the virtual front panel web page You can operate the instrument using the virtu...

Page 107: ...b interface To send SCPI commands using the web page 1 From the navigation bar on the left select SCPI command The web page is displayed as follows Figure 57 SCPI command web page 2 In the Command box...

Page 108: ...l run the batch commands manually one at a time You can select any command from the left panel to start running the batch You can edit the commands that are displayed in the left panel Data logging Yo...

Page 109: ...ng stops at the preset point limit 2 Select Start on the right side of the screen to start logging test data on the web page 3 If the data logging mode is set to Manual select Stop on the right side o...

Page 110: ...viation caused by the line resistor is cancelled 0 means the deviation is not cancelled For more details about this setting refer to Relative offset on page 4 13 OXP In this column 1 means any kind of...

Page 111: ...488 devices It does not recognize other USB devices such as printers scanners and storage devices In this section USB instruments refers to devices that implement the USBTMC or USBTMC USB488 protocol...

Page 112: ...instrument model number serial number The serial number of the instrument the serial number is also on the rear panel INSTR Use the USBTMC protocol To determine these parameters you can run the Keithl...

Page 113: ...s dialog box is displayed Figure 61 Select Communication Bus dialog box 4 Select USB 5 Select Next The Select Instrument Driver dialog box is displayed Figure 62 Select Instrument Driver dialog box 6...

Page 114: ...Virtual Instrument dialog box 9 In the Virtual Instrument Name box enter a name that you want to use to refer to the instrument 10 Select Finish 11 Select Cancel to close the Wizard 12 Save the confi...

Page 115: ...Keithley I O Layer Before installing it is a good practice to check the Product Support web page tek com product support to see if a later version of the Keithley I O Layer is available Search for Kei...

Page 116: ...ront panel Also you can change the value using the arrows or navigation control When the output is turned on changing the value using the navigation control will change the source voltage and current...

Page 117: ...y is operating in constant voltage mode the power supply provides a regulated output voltage As the load increases the output voltage remains constant until the preset current limit is reached Then th...

Page 118: ...e constant voltage mode to the constant current mode also occurs automatically in response to an increase in load For example connect a 5 resistor to the binding posts on the front panel set the volta...

Page 119: ...w to select the measurement mode for the different functions Power supply The power supply function allows you to make the following measurements Measurement functions What the instrument measures Con...

Page 120: ...ion allows you to perform the following measurement function Measurement functions What the instrument measures Concurrent V I Measure voltage and current of the battery at the same time To select the...

Page 121: ...anging is disabled To ensure the best accuracy and resolution when selecting a measurement range use the lowest range possible that does not cause an overflow error To select a measurement range using...

Page 122: ...t of the present range except for the 10 A range the instrument changes the measurement range to the next higher range If the measurement reaches 80 percent to 90 percent of the next lower range the i...

Page 123: ...concurrent measurement range send the command SENSe CONCurrent RANGe AUTO ON You can set specific measurement ranges or allow the instrument to choose the ranges automatically power supply function o...

Page 124: ...ction error on page 2 103 When overvoltage protection is used in a test sequence it should be set before turning the source on Even with the overvoltage protection set to the lowest value never touch...

Page 125: ...ore information refer to Overprotection error on page 2 103 When overcurrent protection is used in a test sequence it should be set before turning the source on Even with the overcurrent protection se...

Page 126: ...30 minutes You cannot turn the output on until the instrument cools down Verify that there is adequate ventilation When you return power to the instrument verify that the cooling fan is running If no...

Page 127: ...and initiate the trigger model OUTPut PROTection CLEar Maximum voltage limits The maximum voltage limits prevent the instrument from sourcing a voltage over a maximum voltage limit This helps prevent...

Page 128: ...latile memory or an external USB flash drive To save a user setup to internal nonvolatile memory using the front panel 1 Configure the 2281S to the settings that you want to save 2 Press the MENU key...

Page 129: ...l USB flash drive When you recall a setup the instrument returns to the settings that are saved in memory To recall a saved setup from internal nonvolatile memory using the front panel 1 Press the MEN...

Page 130: ...lect Save Recall 3 Select the button next to Auto Load Setup1 and press the ENTER key 4 Select On and press ENTER You must save your configuration under setup 1 or it will not be applied when the inst...

Page 131: ...og is saved as eventlog csv on the USB flash drive To save the event log to a USB flash drive using SCPI commands Configure the instrument to the settings that you want to save To save the setup with...

Page 132: ...o Beeper select On or Off To turn the error beeper on or off using SCPI commands SYSTem BEEPer ERRor ON SYSTem BEEPer ERRor OFF To turn the key clicks on or off from the front panel 1 From the home pa...

Page 133: ...you are using the SCPI command set refer to STATus PRESet on page 7 156 Reset the instrument You can reset many of the instrument settings to their default values For details about what gets reset see...

Page 134: ...asure Data Buffers Statistics Format CALCulate2 FORMat ELEMents on page 7 86 All READ UNIT MENU Measure Data Buffers Statistics Function CALCulate2 FUNCtion on page 7 87 Current CURR MENU Measure Data...

Page 135: ...mmand or SYSTem PRESet on page 7 175 command MENU Trigger Digital In Out DIGital LINE n FUNCtion on page 7 100 Line 1 Trigger In Line 2 Meter Out Line 3 Fault Out Line 4 Manual In Line 5 Manual In Lin...

Page 136: ...menu it may not be available for the function you are using Output reset values Setting Default value reset from MENU System Settings Reset Default value reset by the RST on page 7 7 command or SYSTem...

Page 137: ...19 6 5 6 MENU Measure Settings NPLC SENSe n function NPLCycles on page 7 120 1 000 1 0000 MENU Measure Settings Auto Zero SYSTem AZERo n STATe on page 7 162 On 1 On HOME Resolution SENSe n function RE...

Page 138: ...ion SOURce n function PROTection LEVel on page 7 129 6 10 A 6 10 MENU Source Protect Overvoltage Protection SOURce n function PROTection LEVel on page 7 129 21 0 V 21 0 MENU Source Protect Maximum Vol...

Page 139: ...age 7 160 0 Not available from front panel STATus OPERation ENABle on page 7 153 0 Not available from front panel STATus OPERation INSTrument ENABle on page 7 154 0 Not available from front panel STAT...

Page 140: ...ns listed in this table are only available for specific functions power supply battery test or battery simulation If you do not see the option listed here on the menu it may not be available for the f...

Page 141: ...mit BATTery n TEST SOURce CURRent CLIMit on page 7 59 0 1 A 0 1 MENU SOURCE Protect Overvoltage Protection BATTery n TEST SOURce VOLTage PROT ection LEVel on page 7 65 21 V 21 0 MENU SOURCE Protect Ov...

Page 142: ...ge 7 56 100 00 ms 1 00000e 01 MENU Measure A H V Full BATTery n TEST SENSe AH VFULl on page 7 56 0 000 V 0 0 MENU Measure A H Source I Limit BATTery n TEST SENSe AH ILIMit on page 7 55 0 1 A 0 1000 ME...

Page 143: ...MENU Battery Setting Full V BATTery n SIMulator VOC FULL on page 7 50 4 2 V 4 2 V MENU Battery Setting Empty V BATTery n SIMulator VOC EMPTy on page 7 49 3 7 V 3 7 V MENU Battery Setting Resistance o...

Page 144: ...asswords required on all interfaces If you set the instrument access for one function of the instrument the other two functions will share the same setting The front panel is read only when you are us...

Page 145: ...rd screen is displayed 4 Select Remote and press ENTER The Input Original Password screen is displayed 5 Enter the original password 6 Select the OK button on the displayed keyboard An Input New Passw...

Page 146: ...ge manual adjustment Manually adjust the scale and offset of the Y axis Changing the window position and zoom You can use window position and zoom to specify how the readings are displayed on the scre...

Page 147: ...isplayed on the screen Otherwise if buffer is in next or always mode the customized position and zoom settings cannot be applied to graph Adjusting the scale and offset of the Y axis You can adjust th...

Page 148: ...s the Scale soft key The scale screen is displayed 5 Enter a value for scale There are seven divisions on the Y axis The minimum value for the current scale is 10 A The minimum value for the voltage s...

Page 149: ...the Y axis button Then you can place the marker by turning the navigation control The values of voltage current ampere hour and resistance corresponding to either the marker or the most recently captu...

Page 150: ...scale by selecting the Y axis button You can place the marker by turning the navigation control The values of Voc and current corresponding to the marker are displayed under the graph Figure 72 Batter...

Page 151: ...ime between when the source reaches the Vset value and when the measurement is made Figure 73 2281S output delay slew rate and source delay The delays described in this section only apply to the power...

Page 152: ...sing rate and falling rate for the voltage changes Using the front panel 1 Press the MENU key 2 Under Source select Settings 3 Select the button next to Slew Rise and enter a value 4 Select the button...

Page 153: ...delay timer starts if a source delay time has been set 3 The measurements begin after the delay timer expires The default value for the source delay is 1 ms The source delay can be set from 0 s to 99...

Page 154: ...Peak to peak Standard deviation You can perform the following operations on the data buffer from the front panel or the remote interface Configure store and recall a reading buffer View reading buffer...

Page 155: ...ure 74 Buffer indicator Setting reading buffer size and buffer mode To configure the buffer configure the following settings Set the buffer size Set the buffer fill mode Buffer size The initial buffer...

Page 156: ...er mode is only configurable in the power supply function The nonconfigurable buffer mode in the battery test and battery simulation function is Always When autoclear is enabled the buffer is cleared...

Page 157: ...no readings are saved in the buffer send the following command TRACe FEED CONTrol NEVer To set the reading buffer to hold 300 readings send the following command TRACe POINts 300 Viewing and saving b...

Page 158: ...re for the current reading value is A amperes Voltage The value saved in the buffer depends on the measurement function For more information see the following table Unit Indicates the unit of measure...

Page 159: ...y simulation functions the values of ESR and A H are also saved in the buffer To use the front panel to view the contents of the reading buffer 1 Press the MENU key 2 Under Views select Sheet 3 Select...

Page 160: ...o enter the file extension All files are saved as csv files 6 Select Yes to confirm saving the file When the DATA BUFFERS window is displayed again the file is saved 7 Press the HOME key to return to...

Page 161: ...statistics from the front panel or using SCPI commands Specifying the statistics applied to the data in the buffer Using the front panel 1 Press the MENU key 2 Under Measure select Data Buffers 3 Sel...

Page 162: ...CALCulate2 IMMediate CALCulate2 DATA Using the front panel 1 Press the MENU key 2 Under Measure select Data Buffers 3 Select the button next to Statistics Function and press the ENTER key The function...

Page 163: ...m the front panel and value using SCPI commands Using the front panel 1 Press the MENU key 2 Under Measure select Data Buffers 3 Select the button next to Statistics Format The selection window is dis...

Page 164: ...ou sure you want to clear buffer prompt is displayed press Yes to confirm To clear the buffer send the following command TRACe CLEar Automatically clearing a buffer When using the power supply functio...

Page 165: ...mation the trigger model see Trigger model on page 3 30 Digital I O port The digital I O port uses a standard female DB 9 connector which is located on the rear panel of the 2281S You can connect to t...

Page 166: ...er Supply and Battery Simulator Reference Manual Section 3 Functions and features 077114601 March 2019 3 23 The following figure shows the basic configuration of the digital I O port Figure 79 Digital...

Page 167: ...er supply battery test battery simulator Line 1 through 6 Manual output low NA Power supply battery test battery simulator Line 1 through 6 Manual input NA Power supply battery test battery simulator...

Page 168: ...tions trigger only once high and low variations follow the state of the condition For example the Sink Source action has rise and fall variations so when the 2281S switches from source to sink or conv...

Page 169: ...sinks current through the external device In the high state the output transistor is off transistor switch is open This interrupts current flow through the external device Usually this type of applica...

Page 170: ...I O lines To configure digital I O lines from the front panel 1 Press the MENU key 2 Under Trigger select Digital In Out 3 Select the button next to the specified digital I O line The line mode windo...

Page 171: ...anual output high manual output low and manual input Digital Out Sink Source Hi V Low V CC CV End Digital In Output On Output Off Script Start Script Stop For the battery simulator function Digital I...

Page 172: ...y DIGital LINE n CONFigure function action Where n is the digital line and function is line function To read the digital I O line in the power supply function DIGital line n MANual INPut DATA To read...

Page 173: ...gger model The trigger model controls the sequence in which measurements occur It consists of two layers Arm Layer and Trigger Layer to provide versatility Programmable counters allow operations to be...

Page 174: ...Event detection occurs immediately allowing operation to continue Bus Event detection occurs when a bus trigger TRG is received External Trigger Event detection occurs when an input trigger is sent t...

Page 175: ...nctions For details about the measurement function refer to Select a measurement function on page 2 96 Counter Programmable counters are used to repeat operations within the trigger model layers For e...

Page 176: ...itiation enabled INIT CONT ON the instrument continuously performs measurements With continuous initiation disabled INIT CONT OFF the instrument returns to the idle state after all measurements are co...

Page 177: ...ing TRIGger SEQuence n SOURce on page 7 200 Select the control source for the arm layer The available control sources are Immediate triggering External triggering Manual triggering for details see the...

Page 178: ...is displayed 3 Select the button next to Voltage and press the ENTER key 4 Select On 5 Select the button next to Voltage Level and press the ENTER key 6 Set the threshold voltage value for the trigger...

Page 179: ...res Model 2281S 20 6 DC Power Supply and Battery Simulator Reference Manual 3 36 077114601 March 2019 The following figure illustrates how the level trigger is activated when the voltage rises Figure...

Page 180: ...nt panel 1 Press the Menu key 2 Under Trigger select Level and press the ENTER key The LEVEL TRIGGER screen is displayed 3 Select the button next to Current and press the ENTER key 4 Select On 5 Selec...

Page 181: ...owing SCPI commands TRACe n TRIGger CURRent STATe TRACe n TRIGger CURRent LEVel TRACe n TRIGger CURRent DIRection TRACe n TRIGger OFFSet When the level trigger is activated data in the buffer is clear...

Page 182: ...can use lists in the power supply function to set up the instrument to source specific voltage and current values to a device under test DUT You can specify up to 99 step points of voltage and current...

Page 183: ...9 list locations You can also import a predefined list from an external USB flash drive For details refer to Importing a list from an external USB flash drive on page 3 42 6 Use the Insert or Copy but...

Page 184: ...these commands LIST1 CURR 1 1 1 LIST1 VOLT 5 10 15 LIST1 DWEL 2 2 2 LIST1 CURR APPE 2 2 2 LIST1 VOLT APPE 5 10 15 LIST1 DWEL APPE 3 3 3 LIST SAVE INTE 1 Points Voltage V Current A Dwell s 1 5 1 2 2 1...

Page 185: ...ist from USB flash drive on the front panel 1 Press the Menu key 2 Under Source highlight the List icon using either the navigation control or the soft keys Press the ENTER key The Source List screen...

Page 186: ...mber you want to export to the USB flash drive and press ENTER The specified list is saved to a csv file on the USB flash drive The filename is the same as the list name To export a list to USB flash...

Page 187: ...utput delay MENU Source Settings Output Delay MENU Source Settings Delay Rise MENU Source Settings Delay Fall OUTPut DELay STATe on page 7 110 OUTPut DELay RISing on page 7 109 OUTPut DELay FALLing on...

Page 188: ...Settings Rel State MENU Rel Filter Settings Rel Acquire MENU Rel Filter Settings Reference HOME Calculate Rel SENSe n function REFerence STATe on page 7 125 SENSe n function REFerence SENSe n function...

Page 189: ...tions SCPI commands Trigger MENU Trigger Configure List Type MENU Trigger Configure Idle MENU Trigger Configure Arm Source MENU Trigger Configure Arm Count MENU Trigger Configure Trigger Source MENU T...

Page 190: ...ime To set up the dwell time refer to Configuring a list on page 3 40 Point If you choose this mode one list step runs until the preset number of points is reached To set up the number of points sampl...

Page 191: ...nning a list from the front panel you only need to configure the arm source and a sample count for the trigger model For other parameters the instrument changes the settings according to the list conf...

Page 192: ...Depending on the hold time you select in the front panel list options there are two types of device actions during list running shown in the following figures Figure 89 Device action in time mode For...

Page 193: ...he set dwell time is ignored Step mode triggering In step mode the instrument generates a measure complete signal after each list step You can detect this signal in digital I O line 2 For details refe...

Page 194: ...nt time When using immediate triggering the instrument runs the next list step after sending the measure complete signal However when using external bus or manual triggering the instrument moves on to...

Page 195: ...eep mode the instrument generates a measure complete signal after each list cycle You can detect this signal in digital I O line 2 For details refer to Digital I O on page 3 22 Figure 93 Sweep mode tr...

Page 196: ...d zero values for every reading This can slow down sweep operation Be aware that if you disable autozero measurements may drift and become erroneous For more information on the autozero options see Au...

Page 197: ...ee the following figure The sink current is nonprogrammable and the maximum sink current is 1 A 10 percent Figure 95 Sink operation For example if a 12 V battery is connected to the voltage source HI...

Page 198: ...atures 077114601 March 2019 3 55 Battery test The 2281S battery test function allow you to do charge and discharge tests create a battery model and make ESR A H and capacitance measurements Figure 96...

Page 199: ...on to rear panel Keithley recommends using a source measure unit SMU with test script capability for example the Keithley Model 2450 or 2460 to control current sinking when building a discharge model...

Page 200: ...absorbed which is approximately 1 A influenced by the ambient temperature The output voltage is larger than Vset but decreasing Constant voltage phase When the discharging voltage falls to Vset the in...

Page 201: ...attery that works in the range of 3 8 V to 4 2 V you need to set the target voltage lower than 3 8 V 5 Set the end current next to End condition 6 Turn OUTPUT on from the front panel to discharge the...

Page 202: ...an Vset but increasing Constant voltage phase When the charging voltage reaches the Vset value the instrument charges the battery in constant voltage while the charging current is decreasing gradually...

Page 203: ...mpling interval to 30 s To start the charging and measurement send the command BATT TEST SENS AH EXEC STAR The values V2 and A2 are to be provided by the battery manufacturer Improper settings might d...

Page 204: ...y test home screen by pressing HOME on the front panel 3 Select Measure AH in the soft key area 3 4 Select Model Generate 5 Set the Voc range for the battery model 6 Name the battery model 7 Select Ye...

Page 205: ...m 0 percent to 100 percent The second column and third columns are the corresponding values of open voltage and battery resistance There are two kinds of battery models Fine model The SOC is displayed...

Page 206: ...under test simplified as a resistance with constant voltage During charging and discharging its voltage and resistance change based on the charging of the SOC Usually during charging the voltage only...

Page 207: ...istance state approximately 130 k 2 Measure the open circuit voltage Voc 3 The instrument starts to output power 4 Set the output voltage as Voc 200 mV and set the Delay 5 After the delay time measure...

Page 208: ...ont panel 1 Connect the battery to the instrument 2 Select the battery test mode on the startup screen 3 Press the MENU key 4 In the Measure column select Voc ESR 5 Set the ESR Voc Delay 6 Select Meas...

Page 209: ...can sample the charging current continuously at a high frequency during the battery test as shown in the following figure Figure 104 2281S sampling charging current The capacity is computed integrall...

Page 210: ...pacity which is approximately 1 A This sink current is not programmable If the maximum output current of the battery under test is less than 1 A you should connect a resistor between the instrument an...

Page 211: ...ATT TEST SENS AH ESRI S30 Set the V Full to V2 Set the maximum charging limit to A2 Set the sampling interval to 30 s Send the commands BATT TEST SENS AH EXEC STAR STAT OPER INST ISUM COND BATT TEST S...

Page 212: ...the front panel or using SCPI commands To measure capacitance from the front panel 1 Connect the capacitor to the instrument 2 Select the battery test function on the startup screen 3 Press the MENU k...

Page 213: ...attery to test a device in a certain state of the battery for better test efficiency The following topics explain the settings and measurement procedure Figure 106 The 2281S battery simulation functio...

Page 214: ...c Thus the Voc and SOC of the simulated battery will change based on charging and discharging like a real battery 6 Set Full V and Empty V as the range for the simulated battery 7 Return to the batter...

Page 215: ...or Reference Manual 3 72 077114601 March 2019 To set SOC to 80 percent send the command BATT SIM SOC 80 The Voc is changed accordingly To set the battery capacity to 200 mAh send the command BATT SIM...

Page 216: ...instrument performance Optimizing either measurement accuracy or speed You can use resolution NPLC autozero and filter to optimize measurement accuracy and speed You can configure the following parame...

Page 217: ...Benefit Limitation 6 5 1 0 Autozero state On Source delay 0 001 s Source delay state On 6 5 Filter count 10 Filter window 0 01 State On Low noise readings Compensate for temperature gain and offset c...

Page 218: ...6 5 the instrument enables source delay and sets the delay time to 1 ms Setting resolution To set the resolution from the front panel 1 Select the measurement function The resolution setting will be a...

Page 219: ...the number of usable digits The longest amount of time 12 PLCs for 60 Hz and 15 PLCs for 50 Hz provides the lowest reading noise and more resolution but has the slowest reading rate Settings between...

Page 220: ...reference updates is determined by the integration aperture that is used for each customer specified measurement and the internal reference analog to digital converter ADC measurement The autozero mea...

Page 221: ...ress the MENU key 2 Under Measure select Settings 3 Next to Auto Zero select On or Off 4 Select HOME to return to the operating display To set autozero on or off using SCPI commands SYSTem AZERo STATe...

Page 222: ...g takes effect the next time you make measurements Setting the displayed digits using SCPI commands To set the number of displayed digits using SCPI commands SENSe VOLTage DIGits n SENSe CURRent DIGit...

Page 223: ...ions Therefore Reading1 Reading1 Reading1 Reading1 4 The display and remote interface update after first reading With each additional measurement the average updates Reading2 Reading1 Reading1 Reading...

Page 224: ...he 100 setting means that no limit is applied and all readings are included in the averaging For voltage and current the actual filter limit is expressed as a percent of range For example on the 10 mA...

Page 225: ...ce the filter type and count are set up you can enable and disable the averaging filter from the home screen On home screen 2 press the Calculate soft key The Calculate window is displayed Press the F...

Page 226: ...ons apply to the selected measurement function If you change the measurement function the math operation for that measurement function becomes active When you select the concurrent measurement functio...

Page 227: ...Offset and enter a value for b 8 Select the button next to Units The keyboard is displayed 9 Select one alpha character for the units of mx b operation Once m b and units are set up you can enable and...

Page 228: ...ue is the same for all ranges for that measurement function For example if 2 A is set as the relative offset value on the 10 A range the relative offset value is also 2 A on the 1 A 100 mA and 10 mA r...

Page 229: ...ON Where n is the amount of the offset To set the relative offset for another function replace VOLTage with CURRent or CONCurrent Turning on the relative offset Using the front panel 1 Select the mea...

Page 230: ...relative offset will be applied to this function For more information you can refer to Select a measurement function on page 2 96 2 Press the MENU key 3 Under Measure select Rel Filter 4 Select the b...

Page 231: ...019 If any of these operations are set the value that is displayed is the measurement reading with these operations applied For example if you made a measurement and had a relative offset specified th...

Page 232: ...nt panel 1 Press the MENU key 2 Under Measure select Math 3 Select the button next to Buffer Data Type and press Enter 4 Select Reading or CALC The Reading option selects readings before any math calc...

Page 233: ...under test simplified as a resistance with constant voltage During charging and discharging its voltage and resistance change based on the charging of the SOC Usually during charging the voltage only...

Page 234: ...sistance state approximately 130 k 2 Measure the open circuit voltage Voc 3 The instrument starts to output power 4 Set the output voltage as Voc 200 mV and set the Delay 5 After the delay time measur...

Page 235: ...ront panel 1 Connect the battery to the instrument 2 Select the battery test mode on the startup screen 3 Press the MENU key 4 In the Measure column select Voc ESR 5 Set the ESR Voc Delay 6 Select Mea...

Page 236: ...S can sample the charging current continuously at a high frequency during the battery test as shown in the following figure Figure 113 2281S sampling charging current The capacity is computed integral...

Page 237: ...mable If the maximum output current of the battery under test is less than 1 A you should connect a resistor between the instrument and the battery to prevent the battery from switching into protectio...

Page 238: ...rging limit to A2 Set the sampling interval to 30 s Send the commands BATT TEST SENS AH EXEC STAR STAT OPER INST ISUM COND BATT TEST SENS AH GMOD RANG 2 5 3 7 BATT TEST SENS AH GMOD SAVE INTE 1 Start...

Page 239: ...efault instrument configuration This measurement is made in the power supply function Equipment required One 2281S power supply 1 k resistor Two banana cables Set up remote communications You can run...

Page 240: ...voltage and current limit on the front panel 1 In the startup screen choose the power supply function The power supply home screen is displayed 2 Press the V Set soft key The editing window is displa...

Page 241: ...1 OUTP ON INIT CONT ON Configure and execute a 10 step linear list sweep This example demonstrates the steps to set up the power supply to output a linear list sweep from 1 V to 10 V in 1 V steps defa...

Page 242: ...ations see Remote communications interfaces on page 2 68 Figure 116 2281S remote interface connections Device connections Connect a 1 k resistor to the output binding posts on the front panel For deta...

Page 243: ...he value 2 A and press ENTER 10 Select the Dwell box in the point 1 row Press ENTER 11 Make the value 3 s and press ENTER 12 Repeat steps 5 to 8 for points 2 to 10 and increase the voltage by 1 V at e...

Page 244: ...4 Select the button next to Sample Count and press the ENTER key 5 Set the sample count to 10 6 Press the HOME key 7 Press the NEXT soft key twice to navigate to the third home screen 8 Press the List...

Page 245: ...E 1 LIST RCL 1 ARM SOUR BUS TRIG SOUR IMM TRIG COUN 10 TRIG SAMP COUN 10 TRAC CLE TRAC FEED CONT NEXT TRAC FEED SENS TRAC POIN 100 LIST STAT ON INIT TRG WAI TRAC DATA READ SOUR Perform a fast current...

Page 246: ...es For additional information about setting up remote communications see Remote communications interfaces on page 2 68 Figure 119 2281S remote interface connections Device connections Use a Tektronix...

Page 247: ...Manual Section 5 Application examples 077114601 March 2019 5 9 Figure 120 Fast current measurements setup Connect the digital I O pin 1 and pin 9 with AFG output channel For details on digital I O ref...

Page 248: ...ange 8 Select the button next to Auto Zero and press the ENTER key The case issue dialog box is displayed 9 Select Off 10 Select the button next to NPLC and press the ENTER key The number of power lin...

Page 249: ...Set the voltage to 5 V and current limit to 3 A Press the OUTPUT switch to turn on the output To view the current measurements on the front panel 1 Press the MENU key 2 Under Views select Graph You c...

Page 250: ...the load current The green waveform shows the changes of load current and the yellow waveform shows the pulse output Figure 123 Oscilloscope plot To perform a fast current load measurement using SCPI...

Page 251: ...ction on page 2 64 Test a battery and generate a battery model To test a battery and generate a battery model using the front panel 1 Connect the battery to the instrument 2 Select the battery test fu...

Page 252: ...the battery test home screen by pressing HOME on the front panel 13 Select Measure AH in the soft key area 2 14 Set the state to On Then the charging starts with measurement result voltage current Am...

Page 253: ...ands BATT TEST SENS AH VFUL V2 BATT TEST SENS AH ILIM A2 BATT TEST SENS AH ESRI S30 Set the V Full to V2 Set the maximum charging limit to A2 Set the end current to 1 mA Set the sampling interval to 3...

Page 254: ...quired One 2281S DC Power Supply and Battery Simulator A cellphone supplied by a battery Wires Device connections The device under test and 2281S can be connected by two wire sense connection as shown...

Page 255: ...turn to the menu 11 Under Battery select Settings 12 Set SOC to 80 and Voc to 4 1234 V The value of Voc must be within the Empty V and Full V The value of SOC changes according to the value of Voc and...

Page 256: ...uring the charging the values of SOC Voc and Vt are increasing along with the battery capacity When the simulated battery is fully charged the cellphone will stop charging and the Voc measured at this...

Page 257: ...words that are structured to create command messages The command words are separated by colons For example the command words used to enable an average filter are SENSe CONCurrent AVERage STATe ON Man...

Page 258: ...n invalid command generates an error message and is not executed Valid commands that precede an invalid command in a command message are executed Valid commands that follow an invalid command in a com...

Page 259: ...mmand You can use the query to determine the present value of the parameters of the command or to get information from the instrument For example to determine what the present setting for NPLC is you...

Page 260: ...STem BEEPer ERRor STATe ON Note that you do not include the angle brackets when sending the command Sending strings If you are sending a string it must begin and end with matching quotes either single...

Page 261: ...ds that you can use to control your instrument Each command description is broken into several standard subsections The figure below shows an example of a command description Figure 125 SCPI command d...

Page 262: ...y Commands or actions that have a direct effect on the instrument command Recall settings Also known as Recall setup Reload setting from a previous saved setup RCL 1 5 or from the front panel Instrume...

Page 263: ...re of command usage Shows how the parts of the command should be organized 2 User supplied parameters Indicated by angle brackets Some commands have optional parameters Optional parameters are present...

Page 264: ...e 129 SCPI command description example 1 Example code that you can copy from this table and paste into your own application Examples are generally shown using the short forms of the commands 2 Descrip...

Page 265: ...on commands This section describes the general remote interface commands and common commands Note that although these commands are essentially the same as those defined by the IEEE Std 488 2 standard...

Page 266: ...and only Not applicable Not applicable Not applicable Usage CLS Details Use CLS to clear the event registers and queues It performs the following actions Clear the Standard Event Status Register and S...

Page 267: ...the corresponding bit in the Standard Event Status Register is set on the ESB bit of the Status Byte Register is set To set a bit send the constant or the value of the bit as the n parameter When 0 z...

Page 268: ...ter Example ESR Query the contents of the Standard Event Status Register SESR Example output 145 This output indicates that the SESR contains the binary value 10010001 Also see ESE on page 7 3 Status...

Page 269: ...on page 2 108 LANG This command determines which command set is used by the instrument Type Affected by Where saved Default value Query only Not applicable Nonvolatile memory SCPI Usage LANG Details...

Page 270: ...ns have been executed After all programmed operations are completed the instrument returns to the idle state at which time all pending commands including OPC and OPC are executed After the last pendin...

Page 271: ...fault values on page 2 110 SAV This command saves the present instrument settings as a user saved setup Type Affected by Where saved Default value Command only Not applicable Nonvolatile memory Not ap...

Page 272: ...Register 0 Set the instrument for an SRQ interrupt 32 Details To set a bit of Status Request Enable Register send the constant or the value of the bit as the n parameter You can also send 0 to clear...

Page 273: ...the contents of the Status Byte Register Output 145 This output indicates that the Status Byte Register contains the binary value 10010001 Also see Standard Event Register on page D 9 Status model on...

Page 274: ...put Take the 2281S out of the idle state Trigger one measurement Also see ARM subsystem on page 7 21 Status model on page D 1 TRIGger subsystem on page 7 198 TST This command performs a complete self...

Page 275: ...mand is executed The WAI command suspends the execution of commands until the instrument operations of all previous overlapped commands are finished The WAI command is not needed for sequential comman...

Page 276: ...le Not applicable Not applicable Usage ABORt n n Channel number For single channel instruments the value is 1 Details When this command is received the instrument stops the trigger model With continuo...

Page 277: ...to which this setting applies Concurrent CONCurrent DC Current CURRent DC Voltage VOLTage DC range The range value Current range and concurrent range 10 mA range 0 01 100 mA range 0 1 1 A range 1 10...

Page 278: ...strument are represented as POWer Power supply TEST Battery test SIMulator Battery simulator If you set mode as ENTRy you will enter the startup screen Details This command sets the instrument to work...

Page 279: ...latest post processed reading This command does not trigger a measurement It simply requests the last available reading If you send this command more than once and there are no new readings it will r...

Page 280: ...ils refer to Trigger model on page 3 30 Example Bypass the control source of the arm layer RST INIT CONT OFF TRACe CLE ARM SOUR MAN TRIG SOUR IMM TRIG SAMP COUN 1 TRIG COUN 5 ARM COUN 1 OUTP ON INIT F...

Page 281: ...quotes to enclose all of the elements The options for itemlist are described in the following table Element Description Example output READing The measurement reading based on the measurement function...

Page 282: ...age MEASure n function MEASure n function range MEASure n function range resolution n Channel number For single channel instruments the value is 1 function The measurement function to which this setti...

Page 283: ...en this command is sent the following commands execute in the following order CONFigure n function READ n When CONFigure is executed the MEASure parameters range and resolution are executed and the in...

Page 284: ...READ n n Channel number For single channel instruments the value is 1 Details When this command is sent the following commands execute in the order they are presented ABORt INITiate FETCh When this co...

Page 285: ...event Type Affected by Where saved Default value Command and query Recall settings Instrument reset Power cycle Save settings 1 Usage ARM SEQuence n COUNt count ARM SEQuence n COUNt ARM SEQuence n COU...

Page 286: ...ARM SEQuence n SOURce source ARM SEQuence n SOURce n Channel number For single channel instruments the value is 1 source The trigger source for the arm layer Immediate triggering no delay or gating in...

Page 287: ...he trace buffer Type Affected by Where saved Default value Query only Recall settings Instrument reset Power cycle Not applicable Not applicable Usage BATTery n DATA DATA bufferElements n Channel numb...

Page 288: ...only available in SIMulator mode 95 50 RESistance Internal resistance value in SIMulator mode ECR value in TEST mode 1 52 AH Actual A H data only available in TEST mode 1 040727E 4 UNIT Unit for meas...

Page 289: ...pecified default values are VOLTage CURRent UNIT and RELative See Details in BATTery n DATA DATA on page 7 23 for the list of options Details start specifies the beginning of the data queried The trac...

Page 290: ...is 1 fileName You can name the saved data here timeFormat Defines how date and time information from the buffer is saved in the file on the USB flash drive the values are Dates times and fractional s...

Page 291: ...n AUTO Automatically specify the pin state this function only applies to line 1 and 3 Line 1 Trigger in detects falling edge rising edge or either edge triggers as input Line 3 Protection output pulse...

Page 292: ...line 1 to 6 edge RISE FALL Example BATT DIGital LINE2 EDG FALL Set the edge direction of line 2 as FALL Also see None BATTery DIGital LINE n MANual INPut DATA This command queries the manually input...

Page 293: ...The name of the battery model in the USB flash drive Details This command imports a model from a USB flash drive to the instrument and saves it in the internal memory with a name specified by model i...

Page 294: ...separated by commas the maximum length of a string is 2048 Details This command defines a list of element values no more than 101 items for the specified model Creating a list with more than 101 item...

Page 295: ...lement APPend string n Channel number For single channel instruments the value is 1 modelindex 1 to 9 element RESistance resistance Voc open circuit voltage string The setting values separated by comm...

Page 296: ...ce Voc open circuit voltage string Ten setting values separated by commas Details This command allows you to edit a battery model in a rough form without the need to edit 101 points of value When you...

Page 297: ...licable Usage BATTery n MODel modelindex element STEPs n Channel number For single channel instruments the value is 1 modelindex 1 to 9 element RESistance resistance Voc open circuit voltage Details T...

Page 298: ...value Command and query Recall settings Instrument reset Power cycle Nonvolatile memory Not applicable Usage BATTery n MODel modelindex ROW row_index string BATTery n MODel modelindex ROW rowindex n...

Page 299: ...ve settings Not applicable Usage BATTery n MODel RCL modelindex build in model BATTery n MODel RCL n Channel number For single channel instruments the value is 1 modelindex 1 to 9 build in model One o...

Page 300: ...al modelindex n Channel number For single channel instruments the value is 1 modelindex 1 to 9 Details The 2281S can save up to nine battery models in the internal memory Before saving the instrument...

Page 301: ...attery model to a USB flash drive Make sure that the external USB flash drive is connected to the instrument properly before you send this command An unstable connection between the USB flash drive an...

Page 302: ...ry n SIMulator CAPacity LIMit MINimum BATTery n SIMulator CAPacity LIMit MAXimum n Channel number For single channel instruments the value is 1 value 0 001 to 99 Ah Details This command sets the maxim...

Page 303: ...limit for stopping the discharging in the battery simulation function Type Affected by Where saved Default value Command and query Recall settings Instrument reset Power cycle Save settings 0 1 A Usa...

Page 304: ...ion LEVel value BATTery n SIMulator CURRent PROTection LEVel BATTery n SIMulator CURRent PROTection LEVel DEFault BATTery n SIMulator CURRent PROTection LEVel MINimum BATTery n SIMulator CURRent PROTe...

Page 305: ...ery n SIMulator HV value BATTery n SIMulator HV BATTery n SIMulator HV DEFault BATTery n SIMulator HV MINimum BATTery n SIMulator HV MAXimum n Channel number For single channel instruments the value i...

Page 306: ...n SIMulator LV value BATTery n SIMulator LV BATTery n SIMulator LV DEFault BATTery n SIMulator LV MINimum BATTery n SIMulator LV MAXimum n Channel number For single channel instruments the value is 1...

Page 307: ...Mulator METHod mode BATTery n SIMulator METHod n Channel number For single channel instruments the value is 1 mode DYNamic Output depends on the running of the battery model STATic Constant output Det...

Page 308: ...ery simulation function Type Affected by Where saved Default value Command and query Recall settings Instrument reset Power cycle Save settings 0 Usage BATTery n SIMulator RESistance OFFSet value BATT...

Page 309: ...n SIMulator SAMPle INTerval DEFault BATTery n SIMulator SAMPle INTerval MINimum BATTery n SIMulator SAMPle INTerval MAXimum n Channel number For single channel instruments the value is 1 value 8e 5 t...

Page 310: ...ry n SIMulator SOC DEFault BATTery n SIMulator SOC MINimum BATTery n SIMulator SOC MAXimum n Channel number for single channel instruments the value is 1 value 0 0 to 100 0 Details This command sets t...

Page 311: ...e in the battery simulator function Type Affected by Where saved Default value Command and query Recall settings Instrument reset Power cycle Save settings 21 V Usage BATTery n SIMulator TVOLtage PROT...

Page 312: ...value in the battery model Usage BATTery n SIMulator VOC value BATTery n SIMulator VOC BATTery n SIMulator VOC DEFault BATTery n SIMulator VOC MINimum BATTery n SIMulator VOC MAXimum n Channel number...

Page 313: ...C EMPTy MINimum BATTery n SIMulator VOC EMPTy MAXimum n Channel number For single channel instruments the value is 1 value The value range of the Voc Minimum to Maximum Details This command sets the t...

Page 314: ...OC FULL MINimum BATTery n SIMulator VOC FULL MAXimum n Channel number For single channel instruments the value is 1 value The value range of the Voc Minimum to Maximum Details This command sets the th...

Page 315: ...after the measurement Example BATT TEST MEAS EVOC The values of ESR and Voc are returned Also see BATTery n TEST SENSe EVOC DELAy on page 7 56 BATTery n TEST SENSe AH ESRInterval This command sets and...

Page 316: ...AH EXEC STAR Set the measurement to start Also see None BATTery n TEST SENSe AH GMODel RANGe This command sets and queries the range of the open circuit voltage for generating a battery model during A...

Page 317: ...EST SENS AH GMOD RANG Set the Voc range as 2 to 5 V and query the range Return 2 5 Also see None BATTery n TEST SENSe AH GMODel SAVE INTernal This command saves the measurement results to the internal...

Page 318: ...eName n Channel number For single channel instruments the value is 1 fileName You can name the battery model here Details This command saves the measurement results directly to the USB flash drive Mak...

Page 319: ...ery n TEST SENSe AH ILIMit DEFault BATTery n TEST SENSe AH ILIMit MINimum BATTery n TEST SENSe AH ILIMit MAXimum n Channel number For single channel instruments the value is 1 value 0 to 6 1 A Example...

Page 320: ...number For single channel instruments the value is 1 value 0 to 20 V Details This command specifies the end voltage for charging The voltage of the battery is equal or less than this value Example BA...

Page 321: ...ATTery n TEST SENSe SAMPle INTerval value BATTery n TEST SENSe SAMPle INTerval BATTery n TEST SENSe SAMPle INTerval DEFault BATTery n TEST SENSe SAMPle INTerval MINimum BATTery n TEST SENSe SAMPle INT...

Page 322: ...01 A Usage BATTery n TEST SOURce CURRent END value BATTery n TEST SOURce CURRent END BATTery n TEST SOURce CURRent END DEFault BATTery n TEST SOURce CURRent END MINimum BATTery n TEST SOURce CURRent E...

Page 323: ...nt LIMit SOURce value BATTery n TEST CURRent LIMit SOURce BATTery n TEST CURRent LIMit SOURce DEFault BATTery n TEST CURRent LIMit SOURce MINimum BATTery n TEST CURRent LIMit SOURce MAXimum n Channel...

Page 324: ...wer cycle Save settings 6 1 A Usage BATTery n TEST SOURce CURRent PROTection LEVel value BATTery n TEST SOURce CURRent PROTection LEVel BATTery n TEST SOURce CURRent PROTection LEVel DEFault BATTery n...

Page 325: ...gs 21 V Usage BATTery n TEST SOURce HV value BATTery n TEST SOURce HV BATTery n TEST SOURce HV DEFault BATTery n TEST SOURce HV MINimum BATTery n TEST SOURce HV MAXimum n Channel number For single cha...

Page 326: ...ings 0 V Usage BATTery n TEST SOURce LV value BATTery n TEST SOURce LV BATTery n TEST SOURce LV DEFault BATTery n TEST SOURce LV MINimum BATTery n TEST SOURce LV MAXimum n Channel number For single ch...

Page 327: ...BATTery n TEST SOURce VOLTage LEVel MINimum BATTery n TEST SOURce VOLTage LEVel MAXimum n Channel number For single channel instruments the value is 1 value 0 to 20 V Details This command specifies t...

Page 328: ...e settings 20 V Usage BATTery n TEST SOURce VOLTage LIMit value BATTery n TEST SOURce VOLTage LIMit BATTery n TEST SOURce VOLTage LIMit DEFault BATTery n TEST SOURce VOLTage LIMit MINimum BATTery n TE...

Page 329: ...r cycle Save settings 21 V Usage BATTery n TEST SOURce VOLTage PROTection LEVel value BATTery n TEST SOURce VOLTage PROTection LEVel BATTery n TEST SOURce VOLTage PROTection LEVel DEFault BATTery n TE...

Page 330: ...he level trigger will be activated when the current rises above the preset threshold value Also see BATTery n TRACe TRIGger CURRent STATe on page 7 67 BATTery n TRACe TRIGger CURRent LEVel on page 7 6...

Page 331: ...r single channel instruments the value is 1 state ON or 1 Enable the current level trigger OFF or 0 Disable the current level trigger Example BATT TRAC TRIG CURR STAT 1 Enable the current level trigge...

Page 332: ...buffer You can send this command even if the instrument is saving data in the buffer When this command is sent it will return the data stored up to that point Subsequent execution of the command will...

Page 333: ...RDNG MODE Output state CC CV or OFF DATE The date when the data was generated 07 01 2013 TIME The time when the data was generated 19 21 36 2553 TSTamp The date and time when the data was generated 07...

Page 334: ...pecified default values are VOLTage CURRent UNIT and RELative See Details in BATTery n TRACe DATA on page 7 23 for the list of options Details start specifies the beginning of the data queried The tra...

Page 335: ...ue is 1 fileName You can name the saved data here timeFormat Defines how date and time information from the buffer is saved in the file on the USB flash drive the values are Dates times and fractional...

Page 336: ...AC TRIG OCC Queries whether a level trigger has occurred If a level trigger has occurred the value of 1 will be returned Also see None BATTery n TRACe TRIGger OFFSet This command defines the number of...

Page 337: ...e level trigger will be activated when the voltage rises above the preset threshold value Also see BATTery n TRACe TRIGger VOLTage STATe on page 7 74 BATTery n TRACe TRIGger VOLTage LEVel on page 7 73...

Page 338: ...BATTery n TRACe TRIGger VOLTage LEVel on page 7 73 BATTery n TRACe TRIGger VOLTage DIRection on page 7 73 BATTery n OUTPut PROTection CLEar This command clears the overvoltage overcurrent overtempera...

Page 339: ...hannel number For single channel instruments the value is 1 Details There are also six types of responses both in the battery test and battery simulator function including OCP indicates overcurrent pr...

Page 340: ...e value is 1 state Turn source off OFF or 0 Turn source on ON or 1 Disable source DISable or 2 Example BATT OUTP ON Turn the battery output on Also see None BATTery n STATus This command queries the p...

Page 341: ...unction to which this setting applies Concurrent CONCurrent DC Current CURRent DC Voltage VOLTage DC name The name of the math operation y mx b MXB channel The channel number default value is CH1 Chan...

Page 342: ...for the y mx b operation the valid range is 1e6 to 1e6 channel The channel number default value is CH1 Channel 1 CH1 Channel 2 CH2 Details This attribute specifies the offset b for an mx b operation...

Page 343: ...n channel CALCulate 1 function KMATh MMFactor CALCulate 1 function KMATh MMFactor channel function The measurement function to which this setting applies Concurrent CONCurrent DC Current CURRent DC V...

Page 344: ...Instrument reset Power cycle Save settings X Usage CALCulate 1 function KMATh MUNits string CALCulate 1 function KMATh MUNits string channel CALCulate 1 function KMATh MUNits CALCulate 1 function KMAT...

Page 345: ...his setting applies Concurrent CONCurrent DC Current CURRent DC Voltage VOLTage DC state Enable math operation ON or 1 Disable math operation OFF or 0 channel The channel number default value is CH1 C...

Page 346: ...s Return the calculation results of statistics You can get the results in the following order Minimum MINimum Maximum MAXimum Mean MEAN Standard deviation SDEViation Peak to peak PKPK If the specified...

Page 347: ...Before the calculation start the trigger model to take 10 readings The first CALC2 IMM returns reading units timestamp and reading number for MIN and MAX 5 986128E 00V 06 25 2013 09 39 31 4455 0008RND...

Page 348: ...Culate2 FORMat channel itemList The available math statistics Minimum value MINimum Maximum value MAXimum Average MEAN Standard deviation SDEViation Peak to peak PKPK None of the statistic operations...

Page 349: ...on start the trigger model to take 10 readings The first CALC2 IMM returns reading units timestamp and reading number for MIN and MAX 5 986128E 00V 06 25 2013 09 39 31 4455 0008RNDG 5 987489E 00V 06 2...

Page 350: ...LEMents itemList CALCulate2 FORMat ELEMents itemList channel CALCulate2 FORMat ELEMents CALCulate2 FORMat ELEMents channel itemList The available data elements Voltage and current reading READing Read...

Page 351: ...ading and units for MAX and SDEV 5 987489E 00V 4 204334E 04V Also see CALCulate2 FORMat on page 7 84 CALCulate2 IMMediate on page 7 88 CALCulate2 STATe on page 7 90 CALCulate2 FUNCtion This command sp...

Page 352: ...and SDEV 5 986128E 00V 5 987489E 00V 5 986298E 00V 1 360 893E 03V 4 204334E 04V CALC2 DATA returns reading and units for MAX and SDEV 5 987489E 00V 4 204334E 04V Also see CALCulate2 FORMat on page 7...

Page 353: ...Example RST TRAC CLE TRIG COUN 10 VOLT 6 OUTP ON INIT OPC CALC2 STATE ON CALC2 FUNC VOLT CALC2 FORM ELEM READ UNIT TST RNUM CALC2 FORM MIN MAX CALC2 IMM CALC2 FORM MIN MAX MEAN PKPK SDEV CALC2 IMM CA...

Page 354: ...CLE TRIG COUN 10 VOLT 6 OUTP ON INIT OPC CALC2 STATE ON CALC2 FUNC VOLT CALC2 FORM ELEM READ UNIT TST RNUM CALC2 FORM MIN MAX CALC2 IMM CALC2 FORM MIN MAX MEAN PKPK SDEV CALC2 IMM CALC2 FORM MAX SDEV...

Page 355: ...ion PROTected CANCel This command cancels the calibration procedures and drops the new constants Type Affected by Where saved Default value Command only Not applicable Not applicable Not applicable Us...

Page 356: ...mode by using the following command CAL PROT STAT ON password Example CAL PROT CODE 12345678 Change the calibration password to 12345678 Also see CALibration PROTected STATe on page 7 99 CALibration P...

Page 357: ...E 02 4 997200E 00 9 091379E 01 6 047600E 01 1 306331E 02 5 688 220E 01 1 230724E 00 1 521200E 03 4 262407E 03 4 687520E 03 1 500000E 0 1 3 965609E 01 3 980984E 03 3 51767 5E 01 5 200000E 03 1 376206E...

Page 358: ...on Step6 I DAC zero point calibration Step7 I 10 A and I 1 A ADC full scale calibration Step8 I DAC full scale calibration Step9 I 100 mA ADC zero point calibration for sink current Step10 I 100 mA AD...

Page 359: ...d returns 1 CAL PROT STEP6 Start current DAC zero point calibration CAL PROT STEP6 DATA Wait for the instrument to collect data you do not need to enter any parameters OPC Wait until step 6 finishes W...

Page 360: ...oltage resistance CALibration PROTected DC n STEP12 DATA voltage resistance n Channel number For single channel instruments the value is 1 step The following steps represent the entire calibration pro...

Page 361: ...finishes When finished this command returns 1 CAL PROT STEP5 Start current ADC zero point calibration on the 10 A range CAL PROT STEP5 DATA 0 00298 0 0496 Enter the voltage and resistance readings fr...

Page 362: ...alibration procedure has been completed Type Affected by Where saved Default value Command only Not applicable Nonvolatile memory Not applicable Usage CALibration PROTected SAVE Details If the instrum...

Page 363: ...password The password for calibration The maximum length is 8 characters Not case sensitive Details Use this command to enable the calibration mode After enabled you can configure and control calibra...

Page 364: ...o 6 function The pin state see Details for values Details Set function to one of the values shown in the following table Value Description AUTO Automatically specify the pin state This function only a...

Page 365: ...ble Not applicable Not applicable Usage DIGital LINE n MANual INPut DATA n The digital I O line 1 to 6 Details This command queries the manual input digital I O line If the line is not assigned to man...

Page 366: ...Command and query Not applicable Nonvolatile memory ON50 Usage DISPlay BRIGhtness brightness DISPlay BRIGhtness DISPlay BRIGhtness DEFault DISPlay BRIGhtness MINimum DISPlay BRIGhtness MAXimum brightn...

Page 367: ...e user defined text message from the setting area of the screen The instrument returns to the normal mode Example DISP CLE Clear the user defined text message Also see DISPlay USER TEXT DATA on page 7...

Page 368: ...age up to 24 characters channel The channel number default value is CH1 Channel 1 CH1 Channel 2 CH2 Details These commands define text messages for the OUTPUT view screen If you enter too many charact...

Page 369: ...e INITiate n CONTinuous n Channel number For single channel instruments the value is 1 state Disable continuous triggering OFF or 0 Enable continuous triggering ON or 1 Details With continuous initiat...

Page 370: ...s to the external USB flash drive MMEMory LOAD SETup This command recalls the specified setup from the external USB flash drive to the instrument Type Affected by Where saved Default value Command onl...

Page 371: ...only Not applicable Not applicable Not applicable Usage MMEMory SAVE SETup fileName fileName A string that contains a name for the saved setup maximum 8 characters Detail This command allows you to s...

Page 372: ...LLing n channel OUTPut DELay FALLing OUTPut DELay FALLing channel OUTPut DELay FALLing DEFault OUTPut DELay FALLing DEFault channel OUTPut DELay FALLing MINimum OUTPut DELay FALLing MINimum channel OU...

Page 373: ...DELay RISing channel OUTPut DELay RISing DEFault OUTPut DELay RISing DEFault channel OUTPut DELay RISing MINimum OUTPut DELay RISing MINimum channel OUTPut DELay RISing MAXimum OUTPut DELay RISing MAX...

Page 374: ...e Save settings 0 OFF Usage OUTPut DELay STATe state OUTPut DELay STATe state Disable output delay OFF or 0 Enable output delay ON or 1 Details When output delay is set to ON the instrument waits the...

Page 375: ...plicable Usage OUTPut PROTection CLEar OUTPut PROTection CLEar channel channel The channel number default value is CH1 Channel 1 CH1 Channel 2 CH2 Details Clears the protection status if an overvoltag...

Page 376: ...ed channel The channel number default value is CH1 Channel 1 CH1 Channel 2 CH2 Channel 2 CH2 The Details There are six types of responses including OCP indicates over current protection occurred OVP i...

Page 377: ...mand and query Recall settings Instrument reset Power cycle Save settings 0 OFF Usage OUTPut STATe state OUTPut STATe state channel OUTPut STATe state Turn source off OFF or 0 Turn source on ON or 1 D...

Page 378: ...ive Concurrent current or voltage Type Affected by Where saved Default value Command and query Recall settings Instrument reset Power cycle Save settings CONC Usage SENSe n FUNCtion name SENSe n FUNCt...

Page 379: ...t MINimum SENSe n function AVERage COUNt MAXimum n Channel number For single channel instruments the value is 1 function The measurement function to which this setting applies Concurrent CONCurrent DC...

Page 380: ...nction to which this setting applies Concurrent CONCurrent DC Current CURRent DC Voltage VOLTage DC state The filter status set to one of the following values Disable the averaging filter OFF or 0 Ena...

Page 381: ...ed set to one of the following values Moving filter MOVing Details This command selects the type of averaging filter Moving average When the moving average filter is selected the measurements are adde...

Page 382: ...single channel instruments the value is 1 function The measurement function to which this setting applies Concurrent CONCurrent DC Current CURRent DC Voltage VOLTage DC value The filter window 0 01 t...

Page 383: ...which this setting applies Concurrent CONCurrent DC Current CURRent DC Voltage VOLTage DC value 4 5 digit resolution 4 5 5 digit resolution 5 6 5 digit resolution 6 Details This command affects how th...

Page 384: ...f power line cycles for each measurement 0 002 to 12 for 50 Hz 0 002 to 15 for 60 Hz Details This command sets the amount of time that the input signal is measured The amount of time is specified in p...

Page 385: ...ls This command is primarily intended to eliminate the time that is required by the instrument to select an automatic range The options for range are described in the following table Measurement funct...

Page 386: ...y Type Affected by Where saved Default value Command and query Recall settings Instrument reset Power cycle Saved setup 1 ON Usage SENSe n function RANGe AUTO state SENSe n function RANGe AUTO n Chann...

Page 387: ...rence SENSe n CURRent REFerence SENSe n VOLTage REFerence n Channel number For single channel instruments the value is 1 ref The relative offset value Concurrent and current 6 1 to 6 1 A Voltage 20 to...

Page 388: ...erations even if they are set It is as if these settings are disabled After executing this command you can use the following command to see the last relative level value that was acquired or that was...

Page 389: ...DC Voltage VOLTage DC state Disable the relative offset OFF or 0 Enable the relative offset ON or 1 Details This attribute enables or disables relative measurements When relative measurements are enab...

Page 390: ...ommand affects how the reading for a measurement is displayed on the front panel of the instrument It also affects the accuracy or speed of measurements When a resolution is selected the number of pow...

Page 391: ...URce n DELay value SOURce n DELay n Channel number For single channel instruments the value is 1 value Delay 0 to 99 s Resolution 0 00001 s Details This command sets a delay for the source After the p...

Page 392: ...strument reset Power cycle Save settings 1 ON Usage SOURce n DELay STATe state SOURce n DELay STATe n Channel number For single channel instruments the value is 1 state Disable the source delay OFF or...

Page 393: ...ction LEVel value SOURce n CURRent PROTection LEVel SOURce n CURRent PROTection LEVel DEFault SOURce n CURRent PROTection LEVel MINimum SOURce n CURRent PROTection LEVel MAXimum n Channel number For s...

Page 394: ...te AMPLitude MINimum SOURce n VOLTage LEVel IMMediate AMPLitude MAXimum SOURce n CURRent LEVel IMMediate AMPLitude value SOURce n CURRent LEVel IMMediate AMPLitude SOURce n CURRent LEVel IMMediate AMP...

Page 395: ...VOLTage LIMit AMPLitude SOURce n VOLTage LIMit AMPLitude DEFault SOURce n VOLTage LIMit AMPLitude MINimum SOURce n VOLTage LIMit AMPLitude MAXimum n Channel number For single channel instruments the...

Page 396: ...ce n VOLTage SLEW RISing SOURce n VOLTage SLEW RISing DEFault SOURce n VOLTage SLEW RISing MINimum SOURce n VOLTage SLEW RISing MAXimum n Channel number For single channel instruments the value is 1 v...

Page 397: ...n VOLTage SLEW FALLing SOURce n VOLTage SLEW FALLing DEFault SOURce n VOLTage SLEW FALLing MINimum SOURce n VOLTage SLEW FALLing MAXimum n Channel number For single channel instruments the value is 1...

Page 398: ...Ll string The setting values delimited by commas the maximum length of a string is 2048 Details This command defines a list of up to 99 values for a specified list Creating a list with more than 99 st...

Page 399: ...Type Affected by Where saved Default value Command only Instrument reset Nonvolatile memory Not applicable Usage SOURce n LIST listNumber element APPend string n Channel number For single channel ins...

Page 400: ...t on page 7 134 SOURce n LIST SAVE INTernal on page 7 143 SOURce n LIST listNumber element POINts This command queries the length of the specified list Type Affected by Where saved Default value Query...

Page 401: ...Details This command allows you to end a specified list with the last source value or zero value Example LIST END ZERO ON List ends with the 0 V and 0 1000 A Also see None SOURce n LIST HTIMe This com...

Page 402: ...Not applicable Usage SOURce n LIST LOAD USB listNumber fileName n Channel number For single channel instruments the value is 1 listNumber An integer from 1 to 9 that represents the specified location...

Page 403: ...ts the value is 1 type The time you can choose to generate STEP After each list step the instrument will generate a measure complete pulse you can detect this pulse on digital I O line 2 for more info...

Page 404: ...led list is used Sending the command LIST RCL returns the active list number Example 1 Sweep list with BUS trigger hold time type TIME RST Define list LIST1 VOLT 1 2 3 4 5 LIST1 CURR 0 5 1 1 5 2 2 5 L...

Page 405: ...nable list mode Start the trigger model Run the lists Dwell time is ignored in this mode The lists run until the preset points are logged All the readings will be stored in data buffer Example 3 Step...

Page 406: ...Program the voltage list 1 with 2 points Program the current list 1 with 2 points Program the dwell list 1 with 2 points Save list 1 to nonvolatile memory Recall list 1 Select STEP mode Set hold time...

Page 407: ...81S supports up to nine lists You can save a specified list to internal memory Before saving the instrument will verify the points of voltage current and dwell in the specified list If they are the sa...

Page 408: ...ruments the value is 1 listNumber An integer from 1 to 9 that represents the list to save to the USB flash drive fileName A string that contains a name for the saved list maximum 8 characters Detail S...

Page 409: ...n the error 209 Change Sense Function to V I CONCurrent before running a list Example 1 Sweep list with BUS trigger hold time type TIME RST Define list LIST1 VOLT 1 2 3 4 5 LIST1 CURR 0 5 1 1 5 2 2 5...

Page 410: ...nable list mode Start the trigger model Run the lists Dwell time is ignored in this mode The lists run until the preset points are logged All the readings will be stored in data buffer Example 3 Step...

Page 411: ...l Program the voltage list 1 with 2 points Program the current list 1 with 2 points Program the dwell list 1 with 2 points Save list 1 to nonvolatile memory Recall list 1 Select STEP mode Set hold tim...

Page 412: ...value that corresponds to the binary weighted sum of all bits set in the register For details see Measurement Event Register on page D 17 Also see None STATus MEASurement ENABle This command sets or r...

Page 413: ...gister of the status model and then clears the register The instrument returns a decimal value that corresponds to the binary weighted sum of all bits set in the register For details see Measurement I...

Page 414: ...age D 18 STATus MEASurement INSTrument ISUMmary EVENt This command reads the Measurement Instrument Summary Event Register of the status model Type Affected by Where saved Default value Query only Not...

Page 415: ...t Summary Enable Register Details This command sets or reads the contents of the enable register of the Measurement Instrument Summary Event Register MISER When one of these bits is set and the corres...

Page 416: ...ng the value of a register see Measurement Instrument Summary Event Register on page D 19 Example STAT MEAS INST ISUM COND Returns the contents of the Measurement Instrument Summary Condition Register...

Page 417: ...s preface n with b When sending hexadecimal values preface n with h No preface is needed when sending decimal values Example STAT OPER ENAB b0010000000000000 Sets the Operation Status Enable Register...

Page 418: ...t the ISUM bit in the Operation Event Register is set When sending binary values preface n with b When sending hexadecimal values preface n with h No preface is needed when sending decimal values Exam...

Page 419: ...le n STATus OPERation INSTrument ISUMmary ENABle n The status of the Operation Instrument Summary Enable Register Details This command sets or reads the contents of the enable register of the Operatio...

Page 420: ...NST ISUM COND Returns the contents of the Operation Instrument Summary Condition Register of the status model Also see Operation Instrument Summary Event Register on page D 13 STATus PRESet This comma...

Page 421: ...d Default value Query only Not applicable Not applicable Not applicable Usage STATus QUEStionable EVENt Details This command reads the Questionable Event Register of the status model and then clears t...

Page 422: ...values preface n with b When sending hexadecimal values preface n with h No preface is needed when sending decimal values Example STAT QUES ENAB b0010000000000000 Sets the operation Status Enable Regi...

Page 423: ...ent Enable Register Details This command sets or reads the contents of the enable register of the Questionable Instrument Event Register When one of these bits is set and the corresponding bit in the...

Page 424: ...vent Register of the status model Also see Questionable Instrument Summary Event Register on page D 16 STATus QUEStionable INSTrument ISUMmary ENABle This command sets or reads the contents of the Que...

Page 425: ...ister on page D 16 STATus QUEStionable INSTrument ISUMmary CONDition This command reads the Questionable Instrument Summary Condition Register of the status model Type Affected by Where saved Default...

Page 426: ...ngs Instrument reset Power cycle Save settings 1 ON Usage SYSTem AZERo n STATe state SYSTem AZERo n STATe n Channel number For single channel instruments the value is 1 state Disable autozero OFF or 0...

Page 427: ...r messages When enabled a beep signals that an error has happened Example SYSTem BEEPer ERRor ON Enable the error beeper Also see SYSTem KCLick on page 7 170 SYSTem COMMunication ABORt This command ca...

Page 428: ...NFigure MANual IPaddress NETmask GATeway SYSTem COMMunication LAN CONFigure AUTO Use automatically configured LAN settings default MANual Use manually configured LAN settings IPaddress LAN IP address...

Page 429: ...3 Query to verify the settings The response to the query should be MANUAL 192 168 0 1 255 255 240 0 192 168 0 3 Also see SYSTem COMMunication LAN MACaddress on page 7 165 SYSTem COMMunication LAN MACa...

Page 430: ...YST DATE 2014 5 12 Set the system date to May 12 2014 Also see SYSTem TIME on page 7 176 SYSTem ERRor This command reads the oldest error message from the event log Type Affected by Where saved Defaul...

Page 431: ...age 7 167 SYSTem ERRor CODE This command reads and clears the oldest error code Type Affected by Where saved Default value Query only Not applicable Not applicable Not applicable Usage SYSTem ERRor CO...

Page 432: ...event log the output is 5 Also see None SYSTem EVENtlog SAVE This command saves the event log to a file on a USB flash drive Type Affected by Where saved Default value Command only Not applicable Not...

Page 433: ...rument or to the GPIB controller A new GPIB address takes effect when the command to change it is processed If there are response messages in the output queue when this command is processed they must...

Page 434: ...a front panel key has been pressed Example SYSTem KCLick ON Enable the key clicks Also see None SYSTem LOCal This command takes the instrument out of remote operation and restores the operation of fro...

Page 435: ...The instrument automatically detects the power line frequency when the instrument is powered on Power line frequency can be 50 Hz or 60 Hz Example SYST LFR Return the line frequency Also see None SYST...

Page 436: ...ote connection Type Affected by Where saved Default value Command only Power cycle Instrument reset Recall settings Save settings NONE Usage SYSTem PASSword MODE value value Enable the password protec...

Page 437: ...s to the instrument is set to lock this is the password that is used to gain access The instrument continues to use the old password for all interactions until the command to change it executes When c...

Page 438: ...ot correct Example SYST PASS UNL admin Unlock the present interface used to send this command Also see SYSTem PASSword LOCK on page 7 171 SYSTem PASSword MODE on page 7 172 SYSTem PASSword NEW on page...

Page 439: ...ses all user data stored in nonvolatile memory such as list parameter and setup information This command does not influence the status structure registers and error queue This command resets GPIB addr...

Page 440: ...trolled using the remote interface Example SYST RWLock Disables all of the front panel keys Also see SYSTem LOCal on page 7 170 SYSTem TIME This command sets the absolute time of the instrument Type A...

Page 441: ...This query command returns the SCPI standard version Example SYST VERS Query the version Example output 1999 0 Also see None TRACe subsystem The TRACe subsystem contains commands that control the read...

Page 442: ...the storage process is stopped Example DATA CLE AUTO ON Enable autoclear for the buffer Also see Clearing buffer on page 3 20 DATA n DATA This query command returns all the readings from the buffer T...

Page 443: ...The options for bufferElements are described in the following table Option Description Example READing The measurement reading based on the measurement function 8 034562E 03 SOURce The source value 4...

Page 444: ...ments n Channel number For single channel instruments the value is 1 start Beginning index of the buffer to return 1 to 2500 end Ending index of the buffer to return 1 to 2500 bufferElements A list of...

Page 445: ...UNIT The unit of measure reading source value and timestamp V A and s MODE The output state CC CV or OFF DATE The date for the data point 07 01 2013 TIME The time for the data point 19 21 36 2556 TSTa...

Page 446: ...D n Channel number For single channel instruments the value is 1 name Select the source of readings Store the readings before the math calculation SENSe Store the readings after the math calculation C...

Page 447: ...r of readings buffer size is stored buffer operation is disabled Fill continuous ALWays After the specified number of readings is stored operation wraps back to the first buffer location and overwrite...

Page 448: ...umber For single channel instruments the value is 1 newSize The new size for the buffer 2 to 2500 Details Use this command to read the number of measurements that a buffer can store Example DATA POIN...

Page 449: ...ctional seconds are saved the default value TSTamp Relative time stamps in seconds are saved RELative Relative time stamps are saved RSTamp For details about time format see DATA n DATA on page 7 178...

Page 450: ...This command enables or disables the autoclear feature for the buffer Type Affected by Where saved Default value Command and query Power cycle Not applicable 1 ON Usage TRACe n CLEar AUTO state TRACe...

Page 451: ...you can retrieve all the stored readings again by sending this command For example if TRACe DATA READ SOURce is sent the subsequent TRACe DATA MODE command will not return mode information You can ge...

Page 452: ...00 1 779709E 03 0 0000 00E 00 1 000000E 00 1 735228E 03 6 100000E 02 Also see None TRACe n DATA SELected This query command returns specified data elements in the buffer Type Affected by Where saved D...

Page 453: ...ion Description Example READing The measurement reading based on the SENS FUNC setting 8 034562E 03 SOURce The source value 4 566723E 01 UNIT The unit of measure reading source value and timestamp V A...

Page 454: ...ED n Channel number For single channel instruments the value is 1 name Select the source of readings Store the readings before the math calculation SENSe Store the readings after the math calculation...

Page 455: ...er of readings buffer size are stored buffer operation is disabled Fill continuous ALWays after the specified number of readings are stored operation wraps back to the first buffer location and overwr...

Page 456: ...number For single channel instruments the value is 1 newSize The new size for the buffer 2 to 2500 Details Use this command to read the number of measurements that a buffer can store Example TRAC POI...

Page 457: ...actional seconds are saved the default value TSTamp Relative time stamps in seconds are saved RELative Relative time stamps are saved RSTamp For details about time format see TRACe n DATA on page 7 18...

Page 458: ...e preset threshold value Also see TRACe n TRIGger CURRent STATe on page 7 195 TRACe n TRIGger CURRent LEVel on page 7 194 TRACe n TRIGger CURRent LEVel This command configures the current threshold va...

Page 459: ...urrent level trigger function OFF or 0 Disable the current level trigger function Example TRAC TRIG CURR STAT 1 TRAC TRIG CURR STAT 3 The current level trigger function is enabled Also see TRACe n TRI...

Page 460: ...the level trigger activation are not cleared Also see None TRACe n TRIGger VOLTage DIRection This command specifies whether the voltage rises above or falls below a specified level when the level tri...

Page 461: ...the voltage threshold is from 0 to 20 Example TRAC TRIG VOLT 20 TRAC TRIG VOLT The value of the voltage threshold is set to 20 Also see TRACe n TRIGger VOLTage STATe on page 7 197 TRACe n TRIGger VOL...

Page 462: ...nt Type Affected by Where saved Default value Command and query Recall settings Instrument reset Power cycle Save settings 1 Usage TRIGger SEQuence n COUNt count TRIGger SEQuence n COUNt TRIGger SEQue...

Page 463: ...cle Save settings 1 Usage TRIGger SEQuence n SAMPle COUNt count TRIGger SEQuence n SAMPle COUNt TRIGger SEQuence n SAMPle COUNt DEFault TRIGger SEQuence n SAMPle COUNt MINimum TRIGger SEQuence n SAMPl...

Page 464: ...e Save settings IMM Usage TRIGger SEQuence n SOURce source TRIGger SEQuence n SOURce n Channel number For single channel instruments the value is 1 source The trigger source for trigger layer Immediat...

Page 465: ...ions after reviewing this information please contact your local Keithley Instruments representative or call Keithley Instruments corporate headquarters toll free inside the U S and Canada only at 800...

Page 466: ...wer supply is turned on 2 Verify the power line voltage settings Check that the line voltage selector switch on the rear panel is set to the proper value for your country 100 VAC 120 VAC or 220 VAC 24...

Page 467: ...s the subnet mask address of the computer Restart your computer Turn the instrument s power off and then on Wait at least 60 s for the network configuration to be completed Verify that the correct set...

Page 468: ...l memory lost 313 Calibration memory lost 312 PUD memory lost 311 Memory error 310 System error 300 Device specific error 285 Program syntax error 284 Program currently running 282 Illegal program nam...

Page 469: ...Parameter error 215 Arm deadlock 214 Trigger deadlock 213 Init ignored 212 Arm ignored 211 Trigger ignored 210 Trigger error 202 Settings lost due to rtl 201 Invalid while in local 200 Execution error...

Page 470: ...1 Invalid character in number 120 Numeric data error 118 Query not allowed 114 Header suffix out of range 113 Undefined header 112 Program mnemonic too long 111 Header separator error 110 Command head...

Page 471: ...MM reading out of range 120 Step4 100mA shunt value out of range 121 Step4 I ADC 100mA full scale collected data error 122 Step5 I ADC 10A zero DMM reading out of range 123 Step5 10A shunt value out o...

Page 472: ...ion errors Error Message 400 Could not modify IP address 401 Could not modify subnet mask 402 Could not modify gateway address 403 IP address subnet mask and gateway address don t match 406 IP conflic...

Page 473: ...T for single channel instrument 601 Lines 2 4 to 6 don t support function AUTO for single channel instrument 602 Parameter error 603 Not supported in this mode 605 Line 1 will be fixed to ATUO when ar...

Page 474: ...uct documentation The Knowledge Center which contains the following handbooks The Low Level Measurements Handbook Precision DC Current Voltage and Resistance Measurements Switching Handbook A Guide to...

Page 475: ...nect the line cord at the rear panel and remove all test leads connected to the instrument before replacing the line fuse Failure to do so could expose the operator to hazardous voltages that could re...

Page 476: ...drawer back into the power module If the power line fuses continue to become damaged a circuit malfunction exists and must be corrected Return the instrument to Keithley Instruments for repair Upgrad...

Page 477: ...the USB flash drive while an upgrade or downgrade is in progress Wait until the instrument completes the procedure and shows the opening display From the front panel Do not turn off power or remove th...

Page 478: ...result in personal injury or death Do not attempt to perform these procedures unless you are qualified to do so Since the 2281S series of instruments have overvoltage protection built in you should p...

Page 479: ...rformance test results for your power supply Completion of the performance verification procedure does not update the stored time and date of the latest successful adjustment The date and time are upd...

Page 480: ...ion DC voltage load regulation Sink current capability Sink current readback accuracy 1 A Sink current readback accuracy 100 mA Sink current readback accuracy 10 mA DC current setting accuracy DC curr...

Page 481: ...3 DC voltage setting accuracy with remote sense Model number DUT voltage V Test current A Min V Max V Measured voltage V 0 test voltage 2281S 0 3 0 003 0 003 25 test voltage 2281S 5 3 4 996 5 004 50 t...

Page 482: ...voltage setting accuracy without remote sense Model number DUT voltage V Test current A Min V Max V Measured voltage V 0 test voltage 2281S 0 3 0 003 0 003 25 test voltage 2281S 5 3 4 9945 5 0055 50 t...

Page 483: ...B 5 DC voltage readback accuracy with remote sense Model number DUT voltage V Test current A Measured voltage V DUT readback V Absolute difference mV Maximum difference mV 0 test voltage 2281S 0 3 2...

Page 484: ...281S 0 3 3 5 25 test voltage 2281S 5 3 4 5 50 test voltage 2281S 10 3 5 5 75 test voltage 2281S 15 3 6 5 100 test voltage 2281S 20 3 7 5 DC voltage line regulation without remote sense Model number DU...

Page 485: ...ng voltage V Min V Max V Measured voltage V 10 OVP setting 2281S 2 1 745 2 255 25 OVP setting 2281S 5 4 7375 5 2625 50 OVP setting 2281S 10 9 725 10 275 75 OVP setting 2281S 15 14 7125 15 2875 90 OVP...

Page 486: ...readback mA Absolute difference mA Maximum difference mA 10 test current 1 A 2281S 0 1 0 29 50 test current 1 A 2281S 0 5 0 45 100 test current 1 A 2281S 1 0 65 Sink current readback accuracy 10 mA ra...

Page 487: ...ation 077114601 March 2019 B 9 Sink current readback accuracy 100 mA range Model number Test current mA Measured current mA DUT readback mA Absolute difference mA Maximum difference A 10 test current...

Page 488: ...arch 2019 DC current accuracy Model number DUT voltage V Test current A Min A Max A Measured current A 0 test current 2281S 10 0 0 005 0 005 25 test current 2281S 10 1 5 1 494925 1 50575 50 test curre...

Page 489: ...solute difference mA Maximum difference mA 0 test current 2281S 0 0 25 10 test current 2281S 0 6 0 55 50 test current 2281S 3 1 75 100 test current 2281S 6 3 25 DC current readback accuracy 1 A range...

Page 490: ...A Maximum difference A 0 test current 10 mA 2281S 0 10 10 test current 10 mA 2281S 1 10 4 50 test current 10 mA 2281S 5 12 100 test current 10 mA 2281S 10 14 DC current readback accuracy 100 mA range...

Page 491: ...850 DC current load regulation Model number DUT current A Min test voltage 0 V Nom test voltage 10 V Max test voltage 20 V Nom Min A Max Nom A Largest A Max value mA 2281S 6 0 85 DC overcurrent prote...

Page 492: ...arch 2019 Voltage noise at 20 MHz Model number DUT current A DUT voltage V Max mV Measured voltage mV 20 MHz voltage ripple RMS 2281S 3 20 1 20 MHz voltage ripple PKPK 2281S 3 20 6 Current noise at 20...

Page 493: ...is necessary to partially test the DUT using an individual test a 20 minute warm up period is required for the individual test You must connect the DUT and the test equipment to the same AC power circ...

Page 494: ...nt hook up wire 22 AWG minimum connection wires 50 m precision shunt resistor 50 m precision shunt with 5 ppm at 25 C 4 ppm C temperature coefficient Isotek Corp RUG Z R050 0 1 TK1 5 precision shunt r...

Page 495: ...native is to use a fork lug between the DUT and the load and separate connections using fork lugs holding the wiring for one or both of the voltmeter and remote sense A third alternative is to stack b...

Page 496: ...le 13 Increase the DUT output voltage by 25 of the full scale output voltage 14 Repeat step 10 and step 11 until you complete testing at 100 of the full scale output voltage 15 Power off the DUT 16 Di...

Page 497: ...e Figure 135 Voltage accuracy and protection test setup Ensure the warm up criteria have been met as described in the Performance verification conditions To assure accurate measurements the voltmeter...

Page 498: ...lows Set to constant current CC mode Set to draw a constant current at the test current specified for the DUT in the DC voltage setting accuracy without remote sense table 3 Set the DUT to the full sc...

Page 499: ...following figure Figure 137 Voltage readback accuracy without remote sense test setup Make sure the warm up criteria have been met as described in the Performance verification conditions To ensure ac...

Page 500: ...he full scale output voltage 0 V 4 Turn the DUT output on 5 Enter the voltmeter reading in the DC voltage readback accuracy without remote sense table 6 Enter the DUT readback voltage in the DC voltag...

Page 501: ...in the following figure Figure 138 Voltage line regulation test setup To check DC voltage line regulation 1 Change the AC power source output to the minimum voltage specified in the following table D...

Page 502: ...column for your product 8 Change the AC power source output to the maximum voltage specified in the following table DUT voltage selector switch AC source voltage 100 110 V 120 132 V 220 242 V 240 264...

Page 503: ...0 of the full scale output current 4 Set the DUT to 100 of the full scale output voltage 5 Turn the DUT output on 6 Enter the voltmeter reading in the DC voltage load regulation table under the Min co...

Page 504: ...full scale output current 4 Set the overvoltage protection OVP threshold to 10 of full scale output voltage 5 Set DUT output voltage 0 5 V lower than the OVP threshold and turn the DUT output ON 6 In...

Page 505: ...ing figure Make sure the warm up criteria have been met as described in Performance verification conditions Figure 139 Sink current capability test setup To check sink current capability 1 Set the vol...

Page 506: ...1 A range Equipment required AC power source High current 18 AWG wire DC voltmeter High accuracy 0 05 shunt Current shunt resistor cabling Set up the equipment as shown in the following figure Figure...

Page 507: ...C source current to 10 of the test current See the following table Equipment 10 test current A 50 test current A 100 test current A DC source 0 1 0 5 1 5 Turn the DUT output on 6 Enter the voltmeter r...

Page 508: ...pment required AC power source High current 18 AWG wire 300 load resistor High accuracy 0 05 shunt and 5 shunt DC voltmeter Current shunt resistor cabling Set up the equipment as shown in the followin...

Page 509: ...urrent See the following table Equipment Range 10 test current mA 50 test current mA 100 test current mA DC source 100 mA 10 50 100 10 mA 1 5 10 5 Turn the DUT output on 6 Enter the voltmeter reading...

Page 510: ...acy Equipment required AC power source High current 18 AWG wire Electronic load High accuracy 0 05 resistor DC voltmeter Current shunt resistor cabling Set up the equipment as shown in the following f...

Page 511: ...oad as follows a Set to constant voltage b Set to the specified voltage for your DUT see DC current accuracy on page B 10 3 Set the DUT to 0 of the full scale output current 4 Set the DUT to 25 of the...

Page 512: ...g The 2281S has the following ranges to verify 10 A 1 A 100 mA and 10 mA range Follow the procedures described below to check the current readback accuracy on 10 A and 1 A range For other ranges refer...

Page 513: ...est current A 100 test current A 2281S 10 A 0 0 32 1 6 6 1 A 0 0 1 0 5 1 5 Turn the DUT output on 6 Enter the voltmeter reading R1 R2 in the DC current readback accuracy table 7 Enter the DUT current...

Page 514: ...shunt resistor cabling The 2281S has the following ranges to verify 10 A 1 A 100 mA and 10 mA Follow the procedures described below to check the current readback accuracy on 100 mA and 10 mA range For...

Page 515: ...urrent mA 50 test current mA 100 test current mA 2281S 100 mA 0 10 50 100 10 mA 0 1 5 10 5 Turn the DUT output on 6 Enter the voltmeter reading R1 R2 in the DC current readback accuracy table 7 Enter...

Page 516: ...the following figure Figure 145 Current line regulation test setup To check DC current line regulation 1 Change the AC power source output to the minimum voltage specified in the following table DUT...

Page 517: ...Change the AC power source output to the voltage specified in the following table DUT voltage selector switch AC power source voltage 100 110 V 120 132 V 220 242 V 240 264 V 9 Enter the voltmeter read...

Page 518: ...rrent for your product 4 Set the DUT to 100 of the full scale output voltage for your product 5 Turn the DUT output on 6 Enter the voltmeter reading in the DC current load regulation table for checkin...

Page 519: ...to 10 of full scale output current 5 Turn the DUT output on 6 Set DUT current to OCP 0 3 A and then slowly increase the DUT current by 0 01 A step by step until OCP is triggered When triggered the ou...

Page 520: ...under test DUT into your local line power from the mains 2 Plug the test oscilloscope into the same mains outlet as the DUT Some AC power sources create large amounts of high frequency noise on the po...

Page 521: ...oscilloscope as follows 1 mV division 1 M input resistance 20 MHz bandwidth limit AC coupled Autotrigger 1 ms div Set to measure Vp p and VRMS 6 Set the DUT to the 100 full scale output voltage 7 Set...

Page 522: ...strument may not fully reject Noise directly on the mains is typically better controlled Use the same mains outlet for both the DUT and test oscilloscope to avoid ground loops which may cause noise 3...

Page 523: ...ce personnel only Do not attempt these procedures unless you are qualified to do so Some of these procedures may expose you to hazardous voltages that if contacted could cause personal injury or death...

Page 524: ...m time specified by the manufacturer Line power The 2281S requires a line voltage of 100 V 120 V 220 V or 240 V and a line frequency of 50 Hz or 60 Hz Before powering up the instrument properly set th...

Page 525: ...See NOTE below Electronic load Constant current CC 0 001 A to 6 A Constant voltage CV 0 3 V to 60 V See NOTE below Resistor R Load 300 Temperature coefficient power change Vout R R 10 current measure...

Page 526: ...you can use the following procedure to prepare your shunts Step 1 Verify the 5 05 shunt Step 2 Verify the 0 05 shunt Step 1 You can use 5 and 0 05 precision shunt resistors in series instead of the 5...

Page 527: ...shunt using the following formula R0 05 V0 05 Rtotal Vtotal You need to connect the shunt with the power supply electronic load and digital multimeter For details see the following figures After you...

Page 528: ...re information on communicating with the instrument The calibration instructions for the 2281S include the following procedures Voltage calibration Low current calibration on the 10 mA and 100 mA rang...

Page 529: ...ltimeter DMM to the 2281S For the DMM specifications see Required equipment on page C 3 Figure 150 Voltage calibration connections When you are using a binding post on the front panel to make a calibr...

Page 530: ...ration connections For current calibration the following equipment is required Digital multimeter Precision shunt resistors Electronic load or resistor You can use either an electronic load or a resis...

Page 531: ...el 2281S 20 6 DC Power Supply and Battery Simulator Reference Manual Appendix C Calibration and adjustment 077114601 March 2019 C 9 Figure 152 High current calibration connection using an electronic l...

Page 532: ...Appendix C Calibration and adjustment Model 2281S 20 6 DC Power Supply and Battery Simulator Reference Manual C 10 077114601 March 2019 Figure 153 Low current calibration connection using a resistor...

Page 533: ...For sink current calibration the following equipment is required Digital multimeter Precision shunt resistors Power supply You use 2281S as an electronic load or a resistor to perform sink current ca...

Page 534: ...n page C 30 6 The 2281S will prompt you to make connections and start to calibrate voltage and current Refer to the instructions on the following pages Voltage calibration Connect the instrument to a...

Page 535: ...alibration constants from the front panel on page C 19 If you want to continue the calibration press the Next soft key After each calibration step the 2281S output is set to a safe low voltage level p...

Page 536: ...ata the waiting window is displayed You need to wait a few seconds for the internal measurements and calculations The step 4 window is displayed Step 4 1 Before starting this calibration step configur...

Page 537: ...es are shown in the following table Steps Maximum voltage Minimum voltage 5 0 015 V 6e 4 V 6 Not applicable Not applicable 7 1 5 V 0 06 V 8 Not applicable Not applicable The 2281S has 200 W of constan...

Page 538: ...alculations The step 8 calibration window is displayed Step 8 1 Before starting this calibration step configure the shunt and load electronic load or resistor load as shown in the following table Mode...

Page 539: ...ata the waiting window is displayed You need to wait a few seconds for the internal measurements and calculations The step 10 window is displayed Step 10 Before starting this calibration step configur...

Page 540: ...that the proper shunt value was used or that the cables are properly connected For 2281S the expected values are shown in the following table Steps Maximum voltage Minimum voltage 11 5e 4 V 1 75e 2 V...

Page 541: ...MM and press the ENTER key After entering the data the waiting window is displayed You need to wait a few seconds for the internal measurements and calculations The Save calibration window is displaye...

Page 542: ...Use a shielded IEEE 488 cable such as Keithley Instruments Model 7007 Use a standard LAN crossover cable to connect to the ethernet port Use a USB cable to connect to the USB port 2 Turn on the 2281S...

Page 543: ...For the 2281S the expected values are shown in the following table Steps Maximum voltage Minimum voltage 1 0 55 V 0 05 V 2 32 V 28 V Step 1 1 Send the following command to prepare calibration step 1...

Page 544: ...f the expected range Verify that the proper shunt value was used or that the cables are properly connected You can send SYST ERR to query any error messages and error event codes For calibration error...

Page 545: ...Connect the instrument with the digital multimeter DMM precision shunt resistor and electronic load or resistor For details see Current calibration connections on page C 8 Perform the following steps...

Page 546: ...asured result from the digital multimeter DMM and shunt value by sending the command CALibration PROTected STEP5 DATA voltage resistance 4 The instrument begins to take internal measurements This will...

Page 547: ...nfigure the shunt and load electronic load or resistor load as shown in the following table Model Shunt Electronic load Resistor load 2281S 0 05 Constant voltage mode 30 V 6 5 A 5 2 Send the command t...

Page 548: ...digital multimeter DMM and shunt value using the following command CALibration PROTected STEP3 DATA voltage resistance 4 Send the following command to query the operation status OPC After all of the o...

Page 549: ...t the cables are properly connected For 2281S the expected values are shown in the following table Steps Maximum voltage Minimum voltage 11 5e 4 V 1 75e 2 V 12 0 01 V 0 25 V Make sure that cables shun...

Page 550: ...ibration constants to internal memory after each calibration procedure by sending CALibration PROTected SAVE However it works differently when sending this command after each step in a procedure See t...

Page 551: ...CALibration PROTected DATE year month day If you do not configure the date for calibration the instrument uses the last calibration date Exit the calibration procedure using SCPI commands After savin...

Page 552: ...een is displayed 4 Select Calibration and press ENTER The Input Original Password screen is displayed 5 Enter the original password 6 Select the OK button on the displayed keyboard An Input New Passwo...

Page 553: ...ading out of range 7 1 2946 0 12946 Step 2 114 Step2 V ADC full scale collected data error 8 0 003 V 0 0112 V Step 5 122 Step5 I ADC 10A zero DMM reading out of range 9 8 571e 3 1 714e 2 Step 5 124 St...

Page 554: ...N A Step 10 166 Step10 Sink I ADC 100mA full scale collected data error 25 0 N A Step 11 167 Step11 Sink I ADC 1A zero DMM reading out of range 26 0 N A Step 12 169 Step11 Sink I ADC 1A zero collected...

Page 555: ...s occurred and what event caused it As you work with the status model remember that the end result applies to the Status Byte Register All the status register sets and queues flow into the Status Byte...

Page 556: ...nd Questionable Instrument Summary Event Register is shown in the diagram in Questionable registers on page D 3 The relationship between Operation Event Register Operation Instrument Event Register an...

Page 557: ...Model 2281S 20 6 DC Power Supply and Battery Simulator Reference Manual Appendix D Status model 077114601 March 2019 D 3 Status model structure Figure 155 2281S status model diagram...

Page 558: ...ppendix D Status model Model 2281S 20 6 DC Power Supply and Battery Simulator Reference Manual D 4 077114601 March 2019 Figure 156 Questionable registers diagram Figure 157 Operation registers diagram...

Page 559: ...en you program an enable register bit to 1 if the bits in the corresponding registers are set 1 the AND condition occurs You must program all bits in an enable register at the same time This means tha...

Page 560: ...ers in the status model can be cleared using commands or by instrument actions When a registered is cleared the bits in the register are set to 0 The event log and all registers are cleared when instr...

Page 561: ...tention or that some event has occurred When the controller receives an SRQ the controller can interrupt existing tasks to perform tasks that address the request for service Status Byte Register The S...

Page 562: ...egister This register is programmed by the user and is used to enable or disable the setting of bit B6 RQS MSS by the Status Summary Message bits B0 B1 B2 B3 B4 B5 and B7 of the Status Byte Register A...

Page 563: ...r Questionable Event Register Questionable Instrument Event Register Questionable Instrument Summary Event Register Measurement Event Register Measurement Instrument Event Register Measurement Instrum...

Page 564: ...E A command error has occurred See information following this table for descriptions of command errors 6 64 User request URQ An enabled summary bit of the Status Byte Register is set depending on how...

Page 565: ...power supply Bit 13 summarizes operation outputs of the power supply See the following figure and table below it for details Figure 161 2281S Operation Event Register Bit Decimal value Bit name When s...

Page 566: ...Event Register If bit 1 of the Operation Instrument Event Register is set and bit 1 of Operation Instrument Event Enable Register is enabled bit 13 ISUM of the Operation Event Register is set Figure 1...

Page 567: ...indicates the following has occurred 0 1 Calibration Cal The instrument is performing a calibration 1 through 3 Not used Not used NA 4 16 Measurement Meas The instrument is performing a measurement 5...

Page 568: ...ionable Event Register are described in the following figure and table Figure 164 2281S Questionable Event Register Bit Decimal value Bit name When set indicates the following has occurred 0 through 1...

Page 569: ...Questionable Instrument Event Register is set and bit 1 of Questionable Instrument Event Enable Register is enabled bit 13 ISUM of the Questionable Event Register is set See the following figure and t...

Page 570: ...6 2281S Questionable Instrument Summary Event Register Bit Decimal value Bit name When set indicates the following has occurred 0 1 CC The output is in constant current mode 1 2 CV The output is in co...

Page 571: ...ent Event Register are described in the following figure and table below it Figure 167 2281S Measurement Event Register Bit Decimal value Bit name When set indicates the following has occurred 0 throu...

Page 572: ...Measurement Instrument Event Register is set and bit 1 of Measurement Instrument Event Enable Register is enabled bit 13 ISUM of the Measurement Event Register is set See the following figure and tab...

Page 573: ...escribed in the following figure and table Figure 169 2281S Measurement Instrument Summary Event Register Bit Decimal value Bit name When set indicates the following has occurred 0 1 ROF Reading overf...

Page 574: ...ers are described in STATus subsystem on page 7 147 Condition registers The 2281S has the following condition registers Operation Instrument Summary Condition Register Questionable Instrument Summary...

Page 575: ...or Keithley defined messages See Troubleshooting on page 8 1 for details You can clear the error queue by sending the common command CLS In addition you can send the command SYSTem ERRor CLEar Serial...

Page 576: ...fer is full This is useful to notify the controlling computer that it needs to read back the data and empty the buffer After configuring the status model this code configures the reading buffer 1 to a...

Page 577: ...mpleted and the power supply has returned to the idle state After configuring the status model this code will configure and run the trigger model When the trigger model completes the instrument will g...

Page 578: ...e names are the property of Keithley Instruments All other trademarks and trade names are the property of their respective companies Keithley Instruments Corporate Headquarters 28775 Aurora Road Cleve...

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