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Section 5: Basic Digital Multimeter (DMM) Operation 

Series 3700 System Switch/Multimeter User's Manual 

 

5-6 

3700S-900-01 Rev. C / July 2008 

 

Traditional DMM 4-wire measurements are made in two phases, SHI and SLO. 
If the dmm.nplc=1 or a multiple of the power line, theoretically, the average AC 
noise is 0. Refer to the 4W-Rdg calculation (http://www.maxim-
ic.com/appnotes.cfm/appnote_number/1041/). 

 

Figure 5-3: 1plc Line Sychronization Block Diagram 

 

For Line Synchronization off and <1plc, reading rate increases, but 
measurement uncertainty and noise increases due to the Average AC noise 
during the SHI phase not cancelling with the SLO phase. With Line 
Synchronization ON, the SHI and SLO measurement phases are triggered at the 
rising edge of the power line zero crossing. This improves reading uncertainty 
and noise by >30x while minimal reading rate reduction. 

 

Содержание 3700 series

Страница 1: ...c i a n sw i t ho v e r 1 5 0y e a r so f s p e c i a l i z a t i o n 9 0d a yw a r r a n t y 5d a yr i g h t o f r e t u r no na l l e q u i p me n t 1 3y e a r w a r r a n t i e sf o r n e wa n d p...

Страница 2: ...3700 System Switch Multimeter User s Manual 3700S 900 01 Rev C July 2008 www keithley com A G R E A T E R M E A S U R E O F C O N F I D E N C E Series 3700 System Switch Multimeter User s Manual 3700S...

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Страница 4: ...from product modification without Keithley Instruments express written consent or misuse of any product or part This warranty also does not apply to fuses software non rechargeable batteries damage f...

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Страница 6: ...ut the prior written approval of Keithley Instruments Inc is strictly prohibited TSPTM TSP LinkTM and TSP NetTM are trademarks of Keithley Instruments Inc All Keithley Instruments product names are tr...

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Страница 8: ...h transient over voltages often associated with local AC mains connections Assume all measurement control and data I O connections are for connection to Category I sources unless otherwise marked or d...

Страница 9: ...g to federal state and local laws The WARNING heading in the user documentation explains dangers that might result in personal injury or death Always read the associated information very carefully bef...

Страница 10: ...switch 2 10 CONFIG key 2 10 CONFIG CHAN key 2 10 DISPLAY key 2 15 POWER switch 2 16 RESET switch 2 16 Operation keys 2 16 CHAN key 2 16 DELETE key 2 19 DMM key 2 19 ENTER key 2 23 EXIT key 2 24 FILTE...

Страница 11: ...llation 3 8 Connections 3 10 Pseudocards 3 11 Channel assignments 3 11 Bus operation 3 12 Power up 3 14 Line power connection 3 14 Power up sequence 3 15 Close open overview 4 1 Overview 4 1 Channel d...

Страница 12: ...crest factor 5 13 Auto delay 5 16 Measure count 5 19 Speed accuracy and settling times for AC current and voltage 5 20 Low level considerations 5 23 Current measurements DCI and ACI 5 25 AMPS analog b...

Страница 13: ...t 5 79 Temperature 5 79 Model 3750 Additional Information 6 1 Digital I O 6 1 Simplified jumper configuration model 6 2 Sourcing current to an external load 6 4 Sinking current and overload protection...

Страница 14: ...able accessories Model 3720 9 13 Connection information Model 3720 9 14 Schematics Model 3720 9 15 Model 3720 connection log 9 17 Model 3721 dual 1x20 multiplexer card 9 19 Available accessories Model...

Страница 15: ...3730 6 16 high density matrix card 9 55 Available accessories Model 3730 9 55 Connection information Model 3730 9 56 Schematics Model 3730 9 57 Model 3730 connection log 9 59 Model 3740 32 channel iso...

Страница 16: ...ure 3 4 Analog backplane connector 3 6 Figure 3 5 Typical module installation 3 9 Figure 4 1 Multiplexer card display 4 3 Figure 4 2 Matrix card display 4 4 Figure 4 3 Two wire function 4 11 Figure 4...

Страница 17: ...m ATTR MENU OFFSETCOMP 5 34 Figure 5 20 Enabling dry circuit ohms 5 37 Figure 5 21 Four wire Ohm ATTR MENU DRYCIRCUIT 5 37 Figure 5 22 Two wire constant current source method 5 40 Figure 5 23 Four wir...

Страница 18: ...Rate versus Aperture Time 5 77 Figure 5 46 RMS Noise vs Aperture Time 5 78 Figure 6 1 Simplified schematic of the jumper configuration 6 2 Figure 6 2 Simplified schematic of a digital I O channel 6 3...

Страница 19: ...r the Model 3722 9 31 Figure 9 21 Sample Model 3722 connection log 1 of 3 9 32 Figure 9 22 Sample Model 3722 connection log 2 of 3 9 33 Figure 9 23 Sample Model 3722 connection log 3 of 3 9 34 Figure...

Страница 20: ...1 Model 3730 9 55 Figure 9 42 D sub connection information for the Model 3730 9 56 Figure 9 43 Schematic of the Model 3730 9 57 Figure 9 44 Model 3730 ST 9 58 Figure 9 45 Sample Model 3730 connection...

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Страница 22: ...scalable instrument grade switching and multi channel measurement solutions that are optimized for automated testing of electronic products and components The Series 3700 includes four versions of the...

Страница 23: ...bilities Reference manual content Refer to the Series 3700 Reference Manual for specific listing of advanced operations including TSP programming fundamentals and advanced features Range digits rate b...

Страница 24: ...panel The serial number can be viewed by removing the slot covers and or switching modules from the mainframe WARNING Before removing or installing switching modules make sure you turn off the Series...

Страница 25: ......

Страница 26: ...channel types NOTE Not all models will have a digital multimeter DMM installed All DMM related documentation is not applicable to those models If your model does not have a front panel see the followi...

Страница 27: ...ading or writing to a Digital I O channel Figure 2 1 Model 3706 System Switch Multimeter Item Description 1 Special keys and power switch on page 2 10 2 Operation keys on page 2 16 3 Range keys cursor...

Страница 28: ...C July 2008 2 3 NOTE To see current settings for LAN see the applicable lan status commands for example to see the present IP address of the Series 3700 send the following command lan status ipaddress...

Страница 29: ...status LED indicates 1588 operation When this LED is off the 1588 feature is disabled or improperly configured The LED blinks at a one second rate when the instrument is the 1588 master If the instrum...

Страница 30: ...bled for the selected DMM function REL Relative enabled for selected DMM function REM Instrument in bus remote mode or web interface control mode all interfaces LAN GPIB or USB SRQ Service request ove...

Страница 31: ...A thermocouple sensor B B_T C N A thermocouple sensor N N_T C N A thermistor THRM N A three wire RTD 3RTD N A 4 wire RTD 4RTD N A simulated reference junction RJ_SIM N A internal reference junction R...

Страница 32: ...tion for example nofunction dcvolts my4wire and so on is displayed and below it the channel state for example OPN or CLS along with 2 or 4 for pole setting is displayed For digital I O channels DIGITA...

Страница 33: ...us channel mode settings ICL equivalent channel setmode channel output enable ICL equivalent channel setoutputenable and channel label ICL equivalent channel setlabel Some of the attributes have alter...

Страница 34: ...ode Used with 12 character label or no label Fall RST Totalizer falling edge read reset mode Used with 12 character label or no label RiseTRST Totalizer rising edge TTL read reset mode Used with 12 ch...

Страница 35: ...key configuration on page 2 20 LIMIT key configuration on page 2 26 REL key configuration on page 2 29 FILTER key configuration on page 2 24 CONFIG CHAN key CONFIG CHAN key SWITCH channel type Press...

Страница 36: ...elated ICL command channel setpole DELAY Sets additional delay time for the specified channels Related ICL command channel setdelay COUNT Displays closure cycles for the specified channel This option...

Страница 37: ...s EXACT ANY NOT_EXACT NONE Related ICL command channel setmatchtype STATE Queries for the state of a channel and displays the value in the top line labeled by STATE Related ICL command channel getstat...

Страница 38: ...e of the following options TTL NON_TTL RESET Indicates if the count value gets reset after being read Select from one of the following options ON OFF Related ICL command channel setmode MATCH Sets the...

Страница 39: ...range of channels is selected If a range is selected pressing CONFIG CHAN displays the following DAC ATTR MENU No Edit by Range Use EXIT Therefore to see the following options select a single DAC cha...

Страница 40: ...ct one of the following options AUTO OFF Related ICL command channel setmode OUTPUT Sets the output enable attribute on a channel Select one of the following options ENABLE DISABLE Related ICL command...

Страница 41: ...the following items OPEN This menu item opens the specified channels for switching aspects Related Instrument Control Library ICL command channel open CLOSE This menu item closes specified channels T...

Страница 42: ...ading or writing to a Digital I O channel RESET_STATE Resets the channel state Related ICL command channel resetstatelatch RESET Restores the factory default settings of selected channels or all chann...

Страница 43: ...cted channel For example a number from one of the following ranges is displayed for a DAC channel on the 3750 based on the channel s selected mode function 12 to 12 for MODE FUNCTION as VOLTAGE_1 0 to...

Страница 44: ...owing items MEASURE Takes measurements on the digital multimeter DMM without using the trigger model Related ICL command dmm measure COUNT Indicates the number of measurements to take when a measureme...

Страница 45: ...APERTURE Configures the aperture setting for the active DMM function in seconds Related ICL command dmm aperture AUTODELAY Configures the auto delay setting for the active DMM function Related ICL com...

Страница 46: ...2 24 FUNC Displays a menu that allows you to scroll through the available DMM functions Use the navigation wheel or CURSOR keys to scroll the menu options and press ENTER as soon as the desired functi...

Страница 47: ...the unit character for the y mX b operation Related ICL command dmm math mxb units PERCENT Specifies the constant to use for the percent operation Related ICL command dmm math percent For more inform...

Страница 48: ...couple type Related ICL command dmm thermocouple TRANSDUCER Selects the transducer type THERMOCOUPLE THERMISTOR 3RTD or 4RTD Related ICL command dmm transducer THREERTD Specifies the type of 3 wire RT...

Страница 49: ...ore information FILTER key configuration Press the CONFIG key and then the FILTER key to open the FILTER menu The FILTER menu contains the following menu items ENABLE Enables or disables filtered meas...

Страница 50: ...on the DMM If you do not want the DMM to be momentarily configured for the other functions while getting to desired one then press the CONFIG key followed by the FUNC key Next scroll to the desired f...

Страница 51: ...and dmm limit Y clear AUTOCLEAR Indicates if the limit should be cleared automatically or not Related ICL command dmm limit Y autoclear LOWVAL Sets the low limit value Related ICL command dmm limit Y...

Страница 52: ...and installed cards see Upgrade procedure using USB flash drive on page 7 1 This menu includes three options YES NO and PREVIOUS CHANNEL Opens the CONNECT menu that allows you to select a rule BBM MBB...

Страница 53: ...l close EXCLOSE Closes the specified channel pattern so that the channels associated with the pattern are exclusively closed Related ICL command channel exclusiveclose EXSLOTCLOSE Exclusively closes s...

Страница 54: ...the REL key to enable and disable relative for the selected function When enabled the REL annunciator is lit See Relative REL key configuration Press the CONFIG key and then the REL key to open the R...

Страница 55: ...scan list Related ICL command when sent with an empty string scan create RESET Resets the scan settings to factory default values Related ICL command scan reset SCAN key configuration Press the CONFIG...

Страница 56: ...el names and model numbers After pressing this key scroll through all available instruments including the internal DMM if installed using the CURSOR keys navigation wheel or multiple presses of the SL...

Страница 57: ...needed Press the ENTER key when finished changing all the characters RANGE keys Press the RANGE keys to select the next higher or lower measurement range on the measurement display for the selected fu...

Страница 58: ...RECall key Press the RECall key to display stored readings and buffer statistics for selected reading buffer Use the CURSOR keys or turn the navigation wheel to navigate through the buffer For more in...

Страница 59: ...to store readings taken on the front panel CLEAR Removes readings from a selected buffer SAVE Allows you to save a selected reading buffer to a USB flash drive the flash drive must be installed and ha...

Страница 60: ...lane fuse see Analog backplane AMPS fuse on page 3 2 2 Slots 6 places see Slots on page 3 2 3 TSP LinkTM connectors 2 places see TSP LinkTM connector on page 3 2 4 Instrument fuse on page 3 2 5 Power...

Страница 61: ...es 3700 for the switching modules When a module is not installed make sure to cover the slot with a slot cover For additional information on an installed module press the SLOT key on page 2 31 TSP Lin...

Страница 62: ...at is used to perform binning operations can be used with a Digital I O port The Digital I O port is a standard female DB 25 connector Figure 3 2 Digital I O port Pin Description 1 9 Digital I O 1 Dig...

Страница 63: ...that is used to drive external logic circuitry Maximum current output for this line is 600mA This line is protected by a self resetting fuse one hour recovery time GPIB connector For GPIB communicati...

Страница 64: ...has an upstream USB 2 0 connector Type A that connects to a user supplied USB flash drive Use the rear connector to communicate with the instrument over USB by sending the desired commands Use the fro...

Страница 65: ...making any connections Figure 3 4 Analog backplane connector The table below contains pin numbers and descriptions for the analog backplane connector Description Pin Description Pin Analog backplane...

Страница 66: ...ervice personnel WARNING To prevent electric shock that could result in injury or death NEVER handle a switching module that has power applied to it Before installing or removing a switching module ma...

Страница 67: ...t cover plate from the desired mainframe slot Retain the plate and screws for future use 4 With the top cover of the switching module facing up align the module s card edge into the slot s card guide...

Страница 68: ...meter User s Manual Section 3 Rear Panel 3700S 900 01 Rev C July 2008 3 9 Figure 3 5 Typical module installation Item Description 1 Card guide part of Series 3700 2 Module 3 Card edge part of module 4...

Страница 69: ...the rear analog backplane connector of the Series 3700 and the switching module terminals are connected at the same time the test lead insulation must be rated to the highest voltage that is connected...

Страница 70: ...EXIT key takes the Series 3700 out of remote mode When the instrument is turned off the pseudocard will be lost uninstalled In order to recall a pseudocard make it part of a saved setup NOTE A saved s...

Страница 71: ...Press the MENU key to bring up the main menu b Turn the navigation wheel to scroll to GPIB menu item and press the ENTER key c Select setting to change ADDRESS or ENABLE 2 Viewing or configuration ov...

Страница 72: ...able or disable certain aspects of LAN with 1 comm lan telnet enable 2 comm lan web enable 3 comm lan vxi11 enable 4 comm lan rawsockets enable The following list contains the four LAN default port nu...

Страница 73: ...injury or death due to electric shock CAUTION Operating the instrument on an incorrect line voltage may cause damage to the instrument possibly voiding the warranty 1 Before plugging in the power cord...

Страница 74: ...rence manual NOTE If a problem develops while the instrument is under warranty return it to Keithley Instruments Inc for repair Assuming no errors occur the Series 3700 will power up as follows 1 No C...

Страница 75: ...lating a keyclick is issued when a front panel key is pressed A short beep emulating a keyclick is also issued when the navigation wheel is turned or pressed To control the beeper from the front panel...

Страница 76: ...700 have specific settings for switch only operations and specific settings for switch with DMM operations The Series 3700 accesses different settings based upon the close or open operation you specif...

Страница 77: ...mber X Analog backplane relay number Analog backplane relays bank 2 of Slot 1 examples Reference Analog backplane relay 1921 analog backplane relay 1 1922 analog backplane relay 2 1923 analog backplan...

Страница 78: ...y 2008 4 3 Figure 4 1 Multiplexer card display Matrix card notation To control channels using matrix card notation use SRCC where S Slot number R Row number CC Column number always use 2 digits Matrix...

Страница 79: ...hen you request an operation be performed on a range of channels the Series 3700 performs the same operation on all channels within the channel range To select a channel range on the front panel as an...

Страница 80: ...e selected slot s module can be selected For example change the digits to 003 3 Press the navigation wheel a third time This accepts the channel selection above and selects edit mode for the channel r...

Страница 81: ...ng may contain a single channel channel pattern or analog backplane relay as well as multiple ones that are indicated by a range or comma delimited Use a colon to specify a range of channels Examples...

Страница 82: ...only operation on a single channel or range of channels This attribute is not applicable to channel patterns Refer to Channel patterns pole setting pole setting for multiplexer MUX channels indicates...

Страница 83: ...tions dmm close or dmm open the pole setting predominates for switch only operations channel close channel open channel exclusiveclose and channel exclusiveslotclose DMM configurations are part of sav...

Страница 84: ...annel getlabel query To set the DMM configuration attribute for a channel or group of channels use the dmm setconfig command and specify the desired channels in the ch_list parameter To retrieve the D...

Страница 85: ...annel close Close items in an append operation no channels will be opened channel exclusiveclose Close items such that only those specified are closed This will open any closed item that is not specif...

Страница 86: ...appropriate analog backplane relays to connect to the DMM Input and or DMM Sense terminals For 2 wire or two pole DMM operations the Series 3700 closes only the analog backplane relay to connect to t...

Страница 87: ...in Slot 1 of the mainframe and a 4 wire function such as 4 is selected When you perform a DMM close operation on Channel 1001 the Series 3700 closes Channel 1001 and Channel 1911 backplane isolation r...

Страница 88: ...mm close and dmm open commands To access the other switch only operations exclusive close and exclusive slot close use the CHAN key to choose and initiate the desired operation after selecting a chann...

Страница 89: ...el exclusive close 3002 open 3001 no longer being requested as closed close 3002 and 3915 no channel pair because 2 pole and 3915 is backplane relay attribute setting 4 channel exclusive close 3031 op...

Страница 90: ...ross all slots use the channel getstate command Viewing status from the internal web page The Cards page s on the internal web page diagram the relay configuration of the switching module and display...

Страница 91: ...sequential Off which permits the instrument to initiate close and open operations simultaneously NOTE You cannot guarantee the sequence of open and closure operations with the channel connect rule se...

Страница 92: ...Drive For a single close or open operation the state of all relays can be updated in no more than two steps The total settling time for a close or open operation does not exceed twice the settling tim...

Страница 93: ...rn image check that channels and backplane relays contained in the image are correct check that channels and backplane relays contained in the image create the desired path connection Check that any D...

Страница 94: ...00 mainframe for all channel pattern storage The number of channel patterns you can store varies with the number of characters of the channel pattern name the number of characters used in listing the...

Страница 95: ...ttern name for the ch_list parameter Pole settings and channel patterns NOTE Changing a channel s pole setting deletes all patterns containing that channel Set the pole setting of switching module cha...

Страница 96: ...orm a channel exclusive close or channel exclusive slot close operation To perform a particular operation on a channel pattern use the appropriate open or close command with the channel pattern name f...

Страница 97: ...y the first closure will be counted To view the close counts for channels 1 to 5 on Slot 2 using the remote command interface send the following ICL command count channel getcount 2001 2005 print coun...

Страница 98: ...s and channels that are closed print slot x idn where x slot number from 1 to 6 The following example uses the print slot x idn to determine which switching modules or pseudocards are installed in the...

Страница 99: ......

Страница 100: ...ccuracy 5 77 Optimizing measurement speed 5 79 DMM measurement capabilities The DMM of the Series 3700 can make the following measurements DCV DC voltage measurements from 303V to 303V ACV AC voltage...

Страница 101: ...cted to a high energy circuit when set to a current range or low resistance range the circuit is virtually shorted Dangerous arcing can result even when the multimeter is set to a voltage range if the...

Страница 102: ...to allow the internal temperature to stabilize If the instrument has been exposed to extreme temperatures allow extra warmup time Autozero To help maintain stability and accuracy over time and changes...

Страница 103: ...figuration includes OFF ON or ONCE See dmm autozero for remote programming information Line cycle synchronization Synchronizing A D conversions with the frequency of the power line increases common mo...

Страница 104: ...c Digital Multimeter DMM Operation 3700S 900 01 Rev C July 2008 5 5 Figure 5 1 Line cycle synchronization 4 Wire Ohms are sensitive to 50 60Hz power line noise due to cabling and Model 3700 switch car...

Страница 105: ...ation http www maxim ic com appnotes cfm appnote_number 1041 Figure 5 3 1plc Line Sychronization Block Diagram For Line Synchronization off and 1plc reading rate increases but measurement uncertainty...

Страница 106: ...ine Sync Off and On 1plc Voltage measurements DCV and ACV The Series 3700 can make DCV measurements from 0 01 V to 300V and ACV measurements from 0 1 V to 300V RMS 425V peak for AC waveforms DCV input...

Страница 107: ...ternal IBIAS through the 10M causes an open input to read 0 4mV With a short circuit and the input divider on or off the short circuit to read V The input divider can be enabled from the front panel w...

Страница 108: ...Series 3700 System Switch Multimeter User s Manual Section 5 Basic Digital Multimeter DMM Operation 3700S 900 01 Rev C July 2008 5 9 Figure 5 5 DCV connection Figure 5 6 ACV connection...

Страница 109: ...where you can save it as a csv comma separated variable file using File Save As and typing csv as the extension You can open csv files in Microsoft Excel or other spreadsheet application loadscript t...

Страница 110: ...ic Digital Multimeter DMM Operation 3700S 900 01 Rev C July 2008 5 11 Schematic Refer to the following figure for a schematic of the rear panel backplane and DMM connect relays with a typical card Fig...

Страница 111: ...nder 4 wire ohms and RTD temperature measurement sections 1 Press the OPENALL key to open all switching channels 2 Select the voltage measurement function by pressing the CONFIG key and then pressing...

Страница 112: ...the AUTO key for autoranging For manual ranging use the lowest possible range for the best resolution 7 To measure other switching channels repeat steps 5 and 6 8 When finished press the OPENALL key t...

Страница 113: ...Section 5 Basic Digital Multimeter DMM Operation Series 3700 System Switch Multimeter User s Manual 5 14 3700S 900 01 Rev C July 2008 Figure 5 9 ACV measurements sine waves...

Страница 114: ...Series 3700 System Switch Multimeter User s Manual Section 5 Basic Digital Multimeter DMM Operation 3700S 900 01 Rev C July 2008 5 15 Figure 5 10 ACV measurements square pulse and sawtooth waves...

Страница 115: ...ental frequency to measure the signal exactly Because the amount of energy contained in the harmonics becomes smaller with increasing frequency very accurate measurements can be made with a limited ba...

Страница 116: ...s for autodelay and auto range time for the Series 3700 DMM functions Function Detector Bandwidth Range and delays Range 100mV 1V 10V 100V 300V DCV Autodelay 1ms 1ms 1ms 5ms 5ms Auto Range 1ms 1ms 1ms...

Страница 117: ...13ms 25ms 100ms 250ms 375ms Auto Range 2 5ms 2 5ms 12 5ms 25ms 100ms 250ms 375ms Range 1 10 100 2k Dry Ckt Autodelay 3ms 13ms Auto Range 2 5ms 12 5ms Range 1k Continuit y Autodelay 3ms Auto Range 2 5m...

Страница 118: ...ake n measurements This is useful in channel closures or a scan list where multiple measurements are required per channel If dmm measurecount is 1 the front panel TRIG key will perform the measurecoun...

Страница 119: ...g The following example illustrates how to optimize ACV The block diagram shows a two channel scan measuring 1Vrms on the first channel and approximately 100mV on the second channel Due to the interna...

Страница 120: ...ystem Switch Multimeter User s Manual Section 5 Basic Digital Multimeter DMM Operation 3700S 900 01 Rev C July 2008 5 21 Figure 5 13 Two Channel Scan alternating from 1Vac to 100mVac 1KHz with a Measu...

Страница 121: ...elay dmm OFF 1 or dmm ON dmm autodelay dmm ON 2 or dmm AUTODELAY_ONCE dmm autodelay dmm AUTODELAY_ONCE Applies a single 50msec trigger delay to DMM after channel closure DMM takes a 25 readings on the...

Страница 122: ...3 41259 0 427 MED 30 30Hz 300KHz 1ms fixed 200 N a 200 Off 20 6 00595 3 33 Once 6 22548 3 213 On 10 0174 1 997 FAST 300 300Hz 300KHz 8 33us 10us min 1 Off 50 Off 100 0 00765 13 070 Once 0 15072 663 5...

Страница 123: ...perature differences between the junctions of dissimilar metals These can be large compared to the signal that the Series 3700 can measure Thermal EMFs can cause the following conditions Instability o...

Страница 124: ...he displayed reading is 0 100005V The offset is seen as the last digit which is not displayed Therefore the offset is negligible If REL were used to zero the display the 100 counts of offset would be...

Страница 125: ...lat blade screwdriver and rotate the fuse holder one quarter turn counterclockwise 3 Remove the fuse and replace it with the same type 3A 250V fast blow 5 20mm The Keithley Instruments part number is...

Страница 126: ...in slot 4 Offset compensated ohms OC The presence of thermal EMFs voltages can adversely affect low resistance measurement accuracy To overcome these unwanted offset voltages you can use offset compe...

Страница 127: ...q or Period are assigned to Channel 41 or 42 error 1114 function mismatch in configuration is displayed 2 Apply the current s to be measured Refer to DCV section on channel closer assignments and trig...

Страница 128: ...imeter DMM Operation 3700S 900 01 Rev C July 2008 5 29 Connections Analog backplane connector rear panel Connections for resistance measurements are shown below For 2 wire resistance measurements 2 co...

Страница 129: ...8 For 4 wire resistance 4 connect the leads to INPUT HI and LO and sense 4 HI and LO Figure 5 15 Four wire resistance measurement Switching module Connections for the switching module are shown below...

Страница 130: ...the SENSE terminals Channel 1 is paired to Channel 21 Channel 2 is paired to Channel 22 and so on Figure 5 17 Four wire switching module resistance connection Shielding To achieve a stable reading it...

Страница 131: ...ts to channels and open close instructions Refer to the DCV section on triggering procedures 3 To measure other switching channels repeat steps 5 and 6 4 When finished press the OPENALL key to open al...

Страница 132: ...ce at its normal level V2 is the voltage measurement using the lowest current source setting The above 2 point measurement process and reading calculation eliminates the resistance contributed by the...

Страница 133: ...et Compensation annunciator is on OC Performing offset compensated ohms measurements Offset compensated ohms can only be performed on the 4 function using the 1 10 100 1k or 10k ranges Make sure you u...

Страница 134: ...or recalled resistance readings that are displayed With offset compensated ohms enabled it will be remembered by the 4W function after you change measurement functions that is DCV When 4W is again sel...

Страница 135: ...s in a measured contact junction This low open circuit voltage will not puncture the film and will therefore provide a resistance measurement that includes the resistance of the oxide film Oxide films...

Страница 136: ...e disable dry circuit ohms from the front panel Figure 5 20 Enabling dry circuit ohms NOTE The Series 3700 is in 4 wire ohm mode when the 4W is displayed Dry Circuit is active when the DRY is displaye...

Страница 137: ...ake 4 wire connections to the DUT See 4 wire connection information contained in analog backplane connector rear panel on page 5 29 and Switching module on page 5 30 4 Use the RANGE and keys to select...

Страница 138: ...ethod 1 through 1M ranges Sources a constant current to the DUT Voltage is measured by the Series 3700 and resistance is then calculated R V I Ratiometric method 10M and 100M ranges Test current is ge...

Страница 139: ...rrent source method Ratiometric method For the 10M and 100M ranges the ratiometric method is used to measure resistance Test current for this method is generated by a 6 4V voltage source through a 10M...

Страница 140: ...isplays the result RREF is learned during calibration and VSOUR is routinely self calibrated when the dmm autozero attribute is enabled dmm autozero dmm ON As shown the 4W function can also be used to...

Страница 141: ...2008 Note that VMEAS includes the voltage drops of the input test leads Input HI and Input LO Therefore the actual voltage drop across the DUT is VMEAS minus the two voltage drops in the test leads Be...

Страница 142: ...Series 3700 System Switch Multimeter User s Manual Section 5 Basic Digital Multimeter DMM Operation 3700S 900 01 Rev C July 2008 5 43 Figure 5 26 Fast Alternating Scan block diagram...

Страница 143: ...factory defaults reset Break before make off Fastest close method channel connectrule channel OFF dmm func dcvolts dmm range 10 dmm nplc 0 0005 dmm autozero 0 0 or dmm OFF dmm autodelay dmm OFF 1 or...

Страница 144: ...printbuffer x x buf buf relativetimestamps end Prints the reading and relative time from start of scan buf timestamp includes date and real time Note that x x prints reading and time vertically for e...

Страница 145: ...Section 5 Basic Digital Multimeter DMM Operation Series 3700 System Switch Multimeter User s Manual 5 46 3700S 900 01 Rev C July 2008 Figure 5 27 Simplified normal 4W open detection schematic...

Страница 146: ...voltage on the ohm ISOUR VOPEN HI LEAD terminal is 7 1V For the higher ohms ranges 100k through 1M open circuit voltage on the ohm ISOUR VOPEN HI LEAD terminal is 12 8V When an input lead HI or LO is...

Страница 147: ...0S 900 01 Rev C July 2008 Range VMEAS SHI or SLO High Limit Open Lead Detection VMEAS SHI or SLO Low Limit Open Lead Detection 1M 12 8V 1 0V Calculated measurement open voltage A calculated measuremen...

Страница 148: ...disabled and standard 4 wire is enabled VMEAS with open input If Sense HI is disconnected VMEAS will droop less than 1V causing an A D overflow VMEAS with valid connections For valid connections INPU...

Страница 149: ...83 250 0 06 0 010 240 10M 0 06 1 0 0 0083 250 0 06 0 010 240 1 For 10M and 100M Vmeasurement is made on Input HI Input Sense HI is unused 2 Default condition for 4 wire is dmm opendetector dmm ON 3 Fo...

Страница 150: ...m opendetector dmm ON is disabled when dmm drycircuit dmm ON The IOPENLEAD current pulse would exceed the dry circuit voltage application The follow schematic provides a simplified view of the Series...

Страница 151: ...y connected the measurement will read the VDUT and RLEADVOLTAGE drop 2 For dmm drycircuit dmm ON and dmm opendetector dmm ON IOPENLEAD will be disabled but a print dmm opendetector will still return 1...

Страница 152: ...it requires a reference junction that is at a known temperature Reference junctions A reference junction is the cold junction in a thermocouple circuit that is held at a stable known temperature The c...

Страница 153: ...0 measures the temperature of the cold junction screw terminals measures the input voltage and then calculates the temperature reading at the thermocouple To help maintain stability and accuracy over...

Страница 154: ...junction Open thermocouple detection Long lengths of thermocouple wire can have a large amount of capacitance that is seen at the input of the DMM If an intermittent open occurs in the thermocouple ci...

Страница 155: ...oltage on the ohm ISOUR VOPEN HI LEAD terminal If during a measurement cycle the input voltage on ISOUR VOPEN HI LEAD terminal is greater than 7 1V the A D will abort in 100 sec and return an overflow...

Страница 156: ...s Manual Section 5 Basic Digital Multimeter DMM Operation 3700S 900 01 Rev C July 2008 5 57 The following figure provides a schematic representation of the Series 3700 open thermocouple detection Figu...

Страница 157: ...French Yellow Blue K Yellow Red R U S Black Red Brown Blue British White Blue Red Green DIN Red White Red White Japanese Red White Yellow Purple French Yellow Green N Orange Red S U S Black Red Briti...

Страница 158: ...lated reference temperature in other words immersed in an ice bath For the thermocouple capable switching modules you can also use a simulated reference junction as shown or you can connect the thermo...

Страница 159: ...nction SIMULATED INTERNAL or EXTERNAL See Reference junctions on page 5 53 for more information Press the navigation wheel or the ENTER key to set the selection 3 If a SIMULATED reference junction was...

Страница 160: ...mperature coefficient As temperature increases the resistance decreases The Series 3700 measures the resistance of the thermistor and calculates the temperature reading Of all the temperature transduc...

Страница 161: ...0S 900 01 Rev C July 2008 Thermistor connections A thermistor can be connected directly to the analog backplane connector or to any of the applicable input channels of a thermistor capable switching m...

Страница 162: ...e THERMO menu item and press the ENTER key Turn the navigation wheel to scroll to the THERMISTOR temperature connection and press the ENTER key Turn the navigation wheel to select desired resistance 2...

Страница 163: ...For faster RTD measurements when the most accurate measurements are not required offset compensation may be disabled for 3 wire or 4 wire RTD measurements Use of a 3 wire RTD requires a special math...

Страница 164: ...stem Switch Multimeter User s Manual Section 5 Basic Digital Multimeter DMM Operation 3700S 900 01 Rev C July 2008 5 65 Figure 5 37 Three wire RTD connections Figure 5 38 Three wire RTD switching modu...

Страница 165: ...RTD are connected to a primary channel 1 through 20 while the two sense leads are connected to its paired channel 21 through 40 Channel 1 is paired to Channel 21 Channel 2 is paired to Channel 22 and...

Страница 166: ...and then the DMM key The TEMP ATTR MENU will open 3 Set units of measurement degrees Turn the navigation wheel to scroll to the UNITS menu item right most menu item Press the ENTER key Using the navi...

Страница 167: ...alues are 0 to 5 00 dmm rtddelta 1 51 allowed values are 0 to 10 000 dmm rtdzero 125 default dmm ON dmm offsetcompensation dmm OFF dmm configure set my_rtd_user dmm setconfig 4001 4010 my_rtd_user sca...

Страница 168: ...el that it is paired to will close automatically a Use the navigation wheel to dial in the channel number b Press the CLOSE key 6 Press the TRIG key and observe the displayed reading 7 To measure othe...

Страница 169: ...0000 s will be returned Gate time The gate time is the amount of time the Series 3700 uses to sample frequency or period readings Use the RATE key to set the gate time SLOW sets the gate time to 0 25...

Страница 170: ...CONFIG key and then select the DMM key Select the FUNC menu by pressing ENTER Scroll through the menu until FREQ or PERIOD is displayed using the navigation wheel or left right arrows 3 Set threshold...

Страница 171: ...sured circuit is below the set threshold level the instrument will display the resistance readings When the measured circuit is above the threshold level the instrument will display the message OPEN N...

Страница 172: ...n the navigation wheel to scroll to the THRESHOLD menu item right most menu item and press the ENTER key Using the navigation wheel dial in the desired resistance to be used as a threshold 1 1000 Pres...

Страница 173: ...value The threshold value will be remembered after exiting when returning to the function unless reset Accuracy calculations The following information discusses how to calculate accuracy for both DC...

Страница 174: ...teristics accuracy is calculated similarly except that AC speci cations are given as follows Accuracy of reading of range As an example of how to calculate the actual reading limits assume that you ar...

Страница 175: ...voltage reading accuracy into the dB equation yields Thus the actual reading accuracy is 60dB 0 031213dB to 60dB 0 031326dB dBm and dB for other voltage inputs can be calculated in exactly the same m...

Страница 176: ...meter after an ICL command reset Enclosed are two charts that represent RMS Noise versus Aperture Time or NPLC and Reading Rate versus Aperture Time or NPLC Refer to these charts when selecting best a...

Страница 177: ...oltage DC current and resistance 1 or 5 PLC lter off xed range Use REL on DC voltage and 2 wire resistance measurements when appropriate Use 4 wire offset compensation On and Line Sync On for resistan...

Страница 178: ...sistance Select dmm autozero dmm OFF dmm autodelay dmm OFF dmm nplc 0 0005 dmm filter dmm OFF dmm autorange dmm OFF dmm measurecount 1000 For resistance assumed 2 wire ohms AC voltage and AC current S...

Страница 179: ......

Страница 180: ...be tied to either a ground or a positive DC voltage The Model 3750 offers 40 digital I O bits arranged in 5 banks Each bank is referenced as a channel from 1 through 5 The 8 bits in each bank or chann...

Страница 181: ...ter User s Manual 6 2 3700S 900 01 Rev C July 2008 Simplified jumper configuration model Digital outputs can be jumpered to either an internal 5 V or an external voltage The diagram below shows a simp...

Страница 182: ...h bank to the internal pull up resistors Connects those pull up resistors to the internal 5 V Connects VEXT1 to VEXT2 Removing the jumper allows for two different external voltage sources They are gro...

Страница 183: ...Sinking current and overload protection When outputs are set to logic low and the output current becomes greater than about 500 mA the output driver limits the current at this level to restrict intern...

Страница 184: ...d 4 to be read at the same time and returned The specified channel to the command is returned in the least significant byte and subsequent ascending channels are returned in the adjacent bytes For exa...

Страница 185: ...includes a parameter for the data value to be written and an optional width parameter For example to program DAC Channel 1 on the Slot 2 card to go to 5 V after scanning 60 channels on Slot 1 scan cr...

Страница 186: ...threshold voltage is programmable and can be either 0 V or a TTL level 1 5 V Counting occurs when the rising or falling edge on the input signal passes through the defined threshold The edge to be cou...

Страница 187: ...E_RISING_TTL_EDGE_READ_RESET Using the gating function The gate input determines whether the totalizer ignores or counts when the appropriate totalizer threshold is crossed Gating is enabled by defaul...

Страница 188: ...ll scale range This can be used to compensate for constant voltage drops in the system and cabling Each channel has its own separate common return line that provides the reference point for the output...

Страница 189: ...1 specifies 0 20 mA and MODE_CURRENT_2 specifies 4 20 mA To reconfigure the analog output as a voltage output channel setmode 1010 channel MODE_VOLTAGE_1 NOTE The analog output channels can only opera...

Страница 190: ...t_fault channel getstate 1010 channel IND_OVERLOAD If this returned value is true then the output is either currently in a fault condition or was in a fault condition in the past if the fault state is...

Страница 191: ...cuit_fault channel getstate 1010 channel IND_OVERLOAD If this returned value is true then the output is either currently in a fault condition or was in a fault condition in the past if the fault state...

Страница 192: ...s path of the voltage output experiences a voltage drop when current flows At levels of 10 mA or more this can be a significant portion of the accuracy specification For example only 0 1 Ohms of stray...

Страница 193: ...and do not touch other circuitry 1 Remove the top shield cover Unscrew the number 4 40 screw 1 as shown in the Shield removal figure below Slide the top cover in a direction away from the D sub connec...

Страница 194: ...e the following table for individual jumper locations and effects Desired effect P3 pin numbers Install all 8 pull up resistors on CH1 Jumper 1 2 Install all 8 pull up resistors on CH2 Jumper 3 4 Inst...

Страница 195: ...Calibration To maintain specified performance over time the analog output channels and the counter channels might need to be calibrated The Model 3750 supports automatic in system calibration if a DMM...

Страница 196: ...rformed in several steps In each step the hardware outputs a value and expects a measured value to be entered Once all the steps are complete the Model 3750 calculates new calibration constants to be...

Страница 197: ...k ch_list password Calibration example script The following script creates two functions You can use cal_dac and cal_tot to calibrate the analog outputs channels and counter channels respectively load...

Страница 198: ...7 delay 6 rdg dmm measure print rdg channel calibration step channel_num 8 rdg The current mode calibration follows in a similar fashion dmm func dccurrent dmm range 001 dmm nplc 1 dmm filter count 10...

Страница 199: ...n called cal_tot that takes slot number and channel number as parameters No external measurements need to be taken to calibrate the counter channels Be sure to disconnect all external circuits before...

Страница 200: ...mation and examples The command for controlling power is channel setpowerstate ch_list state where state is either channel ON or channel OFF NOTE If an analog channel has been turned off the specified...

Страница 201: ...after the count moves beyond the match value To clear it use channel resetstatelatch 1006 channel IND_MATCH Using match counts to generate an event A match can cause an event in the system that can t...

Страница 202: ...nt has overflowed To read the present status of a channel send status_now channel getstate 1001 If the digital I O matches a present match value the status_now value would be channel IND_MATCH Status...

Страница 203: ...slot basis respectively As a result the requested operation would not have been performed To perform the requested operation more available reserve power is needed as described in Options for working...

Страница 204: ...ed The normal upgrade procedure only upgrades to a higher level software version If any part of the system is already at a higher software revision that part of the system is skipped during the upgrad...

Страница 205: ...lank 2 Power on the Series 3700 3 Install a USB flash drive in the front panel connector 4 On the front panel press the MENU key NOTE If your model does not have a front panel upgrade over the bus wit...

Страница 206: ...gure is accessible from the rear panel just below the analog backplane connector The instrument fuse see item 2 in Fuse location figure is accessible from the rear panel below the GPIB Connector WARNI...

Страница 207: ...106 1 25 To replace a fuse 1 Using a flat tip screwdriver disengage the fuse holder by rotating it counter clockwise 2 Pull out the fuse holder and replace the fuse with the correct type see table 3...

Страница 208: ...hat key will be displayed to indicate that it is functioning properly When the key is released the message No keys pressed is displayed Press the EXIT key twice to end the test DISPLAY PATTERNS There...

Страница 209: ......

Страница 210: ...rse as design validation accelerated stress testing data acquisition and functional testing Plug in modules are capable of switching many relays at once which can take a substantial amount of system p...

Страница 211: ...that each plug in card consumes an amount of system power in order to operate This sustained and roughly constant power draw is known as quiescent power Quiescent power directly takes away from the po...

Страница 212: ...en power is disabled to each analog output channel 820 each or disabled to the totalizers 730 for all 4 cannot be individually disabled See Example 5 on page 9 7 Example 6 on page 9 8 and Example 7 on...

Страница 213: ...annel relays closed Backplane relays closed SLOT 1 3723 30 4 SLOT 2 3723 30 4 SLOT 3 3723 30 4 SLOT 4 3723 30 4 SLOT 5 3723 30 4 SLOT 6 3723 30 4 This produces the following power consumption Slot 1 P...

Страница 214: ...lot 2 Power Consumed 700 107 x 50 1 x 100 6150 Slot 3 Power Consumed 0 0 0 0 Slot 4 Power Consumed 700 107 x 50 1 x 100 6150 Slot 5 Power Consumed 700 107 x 50 1 x 100 6150 Slot 6 Power Consumed 0 0 0...

Страница 215: ...sumed 700 60 x 100 4 x 100 7100 Slot 3 Power Consumed 700 60 x 100 4 x 100 7100 Slot 4 Power Consumed 700 60 x 100 4 x 100 7100 Slot 5 Power Consumed 700 60 x 100 4 x 100 7100 Slot 6 Power Consumed 70...

Страница 216: ...0 Slot 3 Power Consumed 475 0 4 x 100 875 Slot 4 Power Consumed 700 25 x 100 2 x 100 3400 Slot 5 Power Consumed 780 0 4 x 100 1180 Slot 6 Power Consumed 1000 2 x 200 4 x 100 1800 Totals for each bank...

Страница 217: ...h 9 disabled 730 Static power is reduced by disabling the totalizers channels cannot be individually disabled CH 10 disabled 820 Static power is reduced by disabling analog output channel CH 11 disabl...

Страница 218: ...EUDO_3720 or 3720 Model 3721 for Dual 1x20 multiplexer card simulation slot PSEUDO_3721 or 3721 Model 3722 for Dual 1x48 multiplexer card simulation slot PSEUDO_3722 or 3722 Model 3723 Dual 1x30 reed...

Страница 219: ...ome switching modules are capable of switching high voltage signals For safety reasons hardware interlocks are provided The hardware interlocks are present on the switching module itself and are desig...

Страница 220: ...NOTE Do not use the supplied 5 V power source for anything other than energizing the interlock relay It is not designed for external circuit use Be sure to provide a low resistance path between the in...

Страница 221: ...6 78 n911 through n916 Multiplexer 2 76 78 n921 through n926 3721 Multiplexer 1 Amps DMM 33 50 n911 through n917 n041 n042 Amps n928 DMM HI SHI Multiplexer 2 1 34 n921 through n927 3722 No Interlocks...

Страница 222: ...ations Other features of the Model 3720 include its ability to be reconfigured to coordinated four pole operation for additional measurement flexibility Furthermore the Model 3720 supports thermocoupl...

Страница 223: ...tem Switch Multimeter User s Manual 9 14 3700S 900 01 Rev C July 2008 7401 Type K thermocouple wire kit Connection information Model 3720 Refer to the following figure for Model 3720 D sub connection...

Страница 224: ...User s Manual Section 9 Series 3700 Module Schematics and Connections 3700S 900 01 Rev C July 2008 9 15 Schematics Model 3720 The following figure provides a switching schematic for the Model 3720 Fi...

Страница 225: ...Section 9 Series 3700 Module Schematics and Connections Series 3700 System Switch Multimeter User s Manual 9 16 3700S 900 01 Rev C July 2008 Figure 9 6 Models 3720 3723 and 3724 screw terminal...

Страница 226: ...700 Module Schematics and Connections 3700S 900 01 Rev C July 2008 9 17 Model 3720 connection log The following figures provide a sample of a connection log that can be used to record the wiring schem...

Страница 227: ...Section 9 Series 3700 Module Schematics and Connections Series 3700 System Switch Multimeter User s Manual 9 18 3700S 900 01 Rev C July 2008 Figure 9 8 Sample Model 3720 connection log 2 of 2...

Страница 228: ...cated inputs that enable 40 channels of 4 wire common side ohm measurements For thermocouple type measurements automatic cold junction compensation CJC is supported with the Model 3721 ST screw termin...

Страница 229: ...Amps Channel 42 AMP2 DMM HI SHI Channel n928 DMM No Connects NC When viewing this table remember Multiplexer number 1 channels are labeled 1 through 20 and the multiplexer output is labeled MUX 1 OUT...

Страница 230: ...tion 9 Series 3700 Module Schematics and Connections 3700S 900 01 Rev C July 2008 9 21 Connection information Model 3721 Refer to the following figure for Model 3721 D sub connection information Figur...

Страница 231: ...s Series 3700 System Switch Multimeter User s Manual 9 22 3700S 900 01 Rev C July 2008 Schematics Model 3721 The following figure provides a switching schematic for the Model 3721 in two pole mode Fig...

Страница 232: ...s information for channels 1 to 40 911 to 916 921 to 926 then 917 927 and 928 in the response message Therefore the three additional common side ohms backplane relays are listed last For example to pr...

Страница 233: ...enance on the Series 3700 Make sure 3721 card is removed from the system before replacing the AMPS fuse CAUTION Do not use a fuse with a higher current rating than specified or instrument damage can o...

Страница 234: ...anual Section 9 Series 3700 Module Schematics and Connections 3700S 900 01 Rev C July 2008 9 25 Figure 9 13 Removing the top shield Figure 9 14 Fuse location Rating Type Size Keithley Instruments part...

Страница 235: ...Section 9 Series 3700 Module Schematics and Connections Series 3700 System Switch Multimeter User s Manual 9 26 3700S 900 01 Rev C July 2008 Figure 9 15 Model 3721 ST...

Страница 236: ...700 Module Schematics and Connections 3700S 900 01 Rev C July 2008 9 27 Model 3721 connection log The following figures provide a sample of a connection log that can be used to record the wiring schem...

Страница 237: ...Section 9 Series 3700 Module Schematics and Connections Series 3700 System Switch Multimeter User s Manual 9 28 3700S 900 01 Rev C July 2008 Figure 9 17 Sample Model 3721 connection log 2 of 2...

Страница 238: ...gle 1 96 two pole multiplexer or to enable card to card expansion for even larger configurations Another feature of this card is the latching electromechanical relays that can accommodate 300 V 1 A sw...

Страница 239: ...ons Series 3700 System Switch Multimeter User s Manual 9 30 3700S 900 01 Rev C July 2008 Connection information Model 3722 Refer to the following figure for Model 3722 D sub connection information Fig...

Страница 240: ...User s Manual Section 9 Series 3700 Module Schematics and Connections 3700S 900 01 Rev C July 2008 9 31 Schematics Model 3722 The following figure provides a switching schematic for the Model 3722 Fig...

Страница 241: ...ystem Switch Multimeter User s Manual 9 32 3700S 900 01 Rev C July 2008 Model 3722 connection log The following figures provide a sample of a connection log that can be used to record the wiring schem...

Страница 242: ...Series 3700 System Switch Multimeter User s Manual Section 9 Series 3700 Module Schematics and Connections 3700S 900 01 Rev C July 2008 9 33 Figure 9 22 Sample Model 3722 connection log 2 of 3...

Страница 243: ...Section 9 Series 3700 Module Schematics and Connections Series 3700 System Switch Multimeter User s Manual 9 34 3700S 900 01 Rev C July 2008 Figure 9 23 Sample Model 3722 connection log 3 of 3...

Страница 244: ...igurations By using high speed reed relays with actuation times of less than 0 5ms this card can meet the requirements of demanding throughput applications Another feature of the Model 3723 is its sin...

Страница 245: ...s 3700 System Switch Multimeter User s Manual 9 36 3700S 900 01 Rev C July 2008 Connection information Model 3723 Refer to the following figure for Model 3723 D sub connection information Figure 9 25...

Страница 246: ...3700 System Switch Multimeter User s Manual Section 9 Series 3700 Module Schematics and Connections 3700S 900 01 Rev C July 2008 9 37 Figure 9 26 D sub connection information for the Model 3723 one po...

Страница 247: ...s Series 3700 System Switch Multimeter User s Manual 9 38 3700S 900 01 Rev C July 2008 Schematics Model 3723 The following figure provides a switching schematic for the Model 3723 in two pole mode Fig...

Страница 248: ...s Manual Section 9 Series 3700 Module Schematics and Connections 3700S 900 01 Rev C July 2008 9 39 The following figure provides a switching schematic for the Model 3723 in single pole mode Figure 9...

Страница 249: ...Section 9 Series 3700 Module Schematics and Connections Series 3700 System Switch Multimeter User s Manual 9 40 3700S 900 01 Rev C July 2008 Figure 9 29 Models 3720 3723 and 3724 screw terminal...

Страница 250: ...Series 3700 System Switch Multimeter User s Manual Section 9 Series 3700 Module Schematics and Connections 3700S 900 01 Rev C July 2008 9 41 Figure 9 30 Model 3723 ST 1...

Страница 251: ...h Multimeter User s Manual 9 42 3700S 900 01 Rev C July 2008 Model 3723 connection log 60 channel The following figures provide a sample of a connection log that can be used to record the wiring schem...

Страница 252: ...ries 3700 System Switch Multimeter User s Manual Section 9 Series 3700 Module Schematics and Connections 3700S 900 01 Rev C July 2008 9 43 Figure 9 32 Sample Model 3723 connection log 60 channel 2 of...

Страница 253: ...Multimeter User s Manual 9 44 3700S 900 01 Rev C July 2008 Model 3723 connection log 120 channel The following figures provide a sample of a connection log that can be used to record the wiring schem...

Страница 254: ...ries 3700 System Switch Multimeter User s Manual Section 9 Series 3700 Module Schematics and Connections 3700S 900 01 Rev C July 2008 9 45 Figure 9 34 Sample Model 3723 connection log 120 channel 2 of...

Страница 255: ...ction 9 Series 3700 Module Schematics and Connections Series 3700 System Switch Multimeter User s Manual 9 46 3700S 900 01 Rev C July 2008 Figure 9 35 Sample Model 3723 connection log 120 channel 3 of...

Страница 256: ...ries 3700 System Switch Multimeter User s Manual Section 9 Series 3700 Module Schematics and Connections 3700S 900 01 Rev C July 2008 9 47 Figure 9 36 Sample Model 3723 connection log 120 channel 4 of...

Страница 257: ...s connection allows the mainframe to reconfigure the card to a single 1 60 two pole multiplexer or to enable card to card expansion for even larger configurations Other features of the Model 3724 incl...

Страница 258: ...3791 KIT78 R 78 pin female D sub connector kit contains 2 female D sub connectors and 156 solder cups 3720 MTC 3 78 pin D sub female to male cable 3 m 9 8 ft 3720 MTC 1 5 78 pin D sub female to male c...

Страница 259: ...Section 9 Series 3700 Module Schematics and Connections Series 3700 System Switch Multimeter User s Manual 9 50 3700S 900 01 Rev C July 2008 Schematics Model 3724 Figure 9 39 Model 3724 schematic...

Страница 260: ...01 Rev C July 2008 9 51 Figure 9 40 Models 3720 3723 and 3724 screw terminal Model 3724 connection log The following table provides a sample of a connection log that can be used to record the wiring...

Страница 261: ...h Multimeter User s Manual 9 52 3700S 900 01 Rev C July 2008 Channel Color Pin Number CH8 H L CH9 H L CH10 H L CH11 H L CH12 H L CH13 H L CH14 H L CH15 H L CH16 H L CH17 H L CH18 H L CH19 H L CH20 H L...

Страница 262: ...Schematics and Connections 3700S 900 01 Rev C July 2008 9 53 Channel Color Pin Number L CH30 H L OUTPUT 2 H L CH31 H L CH32 H L CH33 H L CH34 H L CH35 H L CH36 H L CH37 H L CH38 H L CH39 H L CH40 H L...

Страница 263: ...ematics and Connections Series 3700 System Switch Multimeter User s Manual 9 54 3700S 900 01 Rev C July 2008 Channel Color Pin Number CH50 H L CH51 H L CH52 H L CH53 H L CH54 H L CH55 H L CH56 H L CH5...

Страница 264: ...lays This allows for easy matrix column expansion A matrix of up to 6 rows by 96 columns can be supported within a single Model 3706 mainframe with six Model 3730 cards The Model 3730 uses two 50 pin...

Страница 265: ...s Series 3700 System Switch Multimeter User s Manual 9 56 3700S 900 01 Rev C July 2008 Connection information Model 3730 Refer to the following figure for Model 3730 D sub connection information Figur...

Страница 266: ...trix channels Unlike MUX channels matrix channels do not have a DMM configuration associated with them Therefore specifying a matrix channel in the channel list parameter to the dmm setconfig function...

Страница 267: ...Section 9 Series 3700 Module Schematics and Connections Series 3700 System Switch Multimeter User s Manual 9 58 3700S 900 01 Rev C July 2008 Figure 9 44 Model 3730 ST...

Страница 268: ...s 3700 Module Schematics and Connections 3700S 900 01 Rev C July 2008 9 59 Model 3730 connection log The following figures provide a sample of a connection log that can be used to record the wiring sc...

Страница 269: ...ted on the card Custom configurations can be created with the user accessible terminal blocks For additional protection an onboard temperature sensor notifies the mainframe when the card s operating t...

Страница 270: ...tion 9 Series 3700 Module Schematics and Connections 3700S 900 01 Rev C July 2008 9 61 Connection information Model 3740 Refer to the following figure for Model 3740 D sub connection information Figur...

Страница 271: ...cs and Connections Series 3700 System Switch Multimeter User s Manual 9 62 3700S 900 01 Rev C July 2008 Schematics Model 3740 The following figure provides a switching schematic for the Model 3740 Fig...

Страница 272: ...Series 3700 System Switch Multimeter User s Manual Section 9 Series 3700 Module Schematics and Connections 3700S 900 01 Rev C July 2008 9 63 Figure 9 49 Model 3740 ST...

Страница 273: ...ystem Switch Multimeter User s Manual 9 64 3700S 900 01 Rev C July 2008 Model 3740 connection log The following figures provide a sample of a connection log that can be used to record the wiring schem...

Страница 274: ...40 bidirectional digital I O bits arranged in five banks of eight bits each Each bank can be configured as either inputs or outputs One bank of I O is equivalent to one system channel The two analog o...

Страница 275: ...52 Model 3750 Multifunction I O Card Available accessories Model 3750 3750 ST Screw terminal panel 3790 KIT50 R 50 pin female D sub connector kit solder cup contacts See Connection information Model 3...

Страница 276: ...0 System Switch Multimeter User s Manual Section 9 Series 3700 Module Schematics and Connections 3700S 900 01 Rev C July 2008 9 67 Connection information Model 3750 Figure 9 53 Model 3750 connection i...

Страница 277: ...Manual 9 68 3700S 900 01 Rev C July 2008 Schematics Model 3750 Figure 9 54 Model 3750 screw terminal schematic Model 3750 connection log The following figures provide a sample of a connection log that...

Страница 278: ...2008 9 69 Channel Color Pin Number CH1 DIO3 CH1 DIO4 CH1 DIO5 CH1 DIO6 CH1 DIO7 CH1 DIO8 CH2 DIO1 CH2 DIO2 CH2 DIO3 CH2 DIO4 CH2 DIO5 CH2 DIO6 CH2 DIO7 CH2 DIO8 CH3 DIO1 CH3 DIO2 CH3 DIO3 CH3 DIO4 CH3...

Страница 279: ...y 2008 Channel Color Pin Number CH5 DIO4 CH5 DIO5 CH5 DIO6 CH5 DIO7 CH5 DIO8 CH6 Gate CH6 Gate CH6 Input CH6 Input CH7 Gate CH7 Gate CH7 Input CH7 Input CH8 Gate CH8 Gate CH8 Input CH8 Input CH9 Gate...

Страница 280: ...Series 3700 System Switch Multimeter User s Manual Section 9 Series 3700 Module Schematics and Connections 3700S 900 01 Rev C July 2008 9 71...

Страница 281: ......

Страница 282: ...AC voltage and AC current 5 78 5 79 measurements and crest factor 5 13 accessories available 9 13 9 19 9 29 9 35 9 55 9 60 accuracy calculations 5 74 ACI current measurements 5 25 action keys action...

Страница 283: ...operation definition 3 12 C cable leakage 5 31 calculated measurement open voltage 5 48 5 52 calculating AC characteristics accuracy 5 75 DC characteristics accuracy 5 74 open voltage 5 75 calculatio...

Страница 284: ...t 5 39 low level 5 23 performance 5 3 constant current source method 5 39 contact information 1 1 continuity testing connections 5 72 overview 5 72 procedure 5 73 CURSOR keys 2 31 D dB channel type in...

Страница 285: ...t 5 22 external reference junction 5 55 switch with DMM operations 4 13 switch only 4 13 EXIT key 2 24 F fast alternating scan 5 44 fast DCV measurements 5 10 FILTER key 2 24 key configuration 2 21 2...

Страница 286: ...3 AUTO 2 31 CHAN See CHAN key CLOSE 2 32 CONFIG 2 10 CURSOR 2 31 DELETE 2 19 DISPLAY 2 15 ENTER 2 23 EXIT 2 24 FILTER 2 24 FUNC 2 25 INSERT 2 25 key 2 19 LIMIT 2 26 LOAD 2 26 MENU 2 27 OPEN 2 33 OPEN...

Страница 287: ...age 5 39 MENU key 2 27 Model 3720 9 13 9 17 Model 3721 9 19 9 20 9 24 9 27 Model 3722 9 29 9 32 Model 3723 9 35 9 42 9 44 Model 3730 9 59 Model 3740 9 60 9 64 modules channel assignments 3 11 cold jun...

Страница 288: ...TRIG 2 31 P p 4 20 PATT configuration 2 29 key 2 28 performance considerations 5 3 power budgeting 9 2 9 4 POWER switch 2 16 power usage 9 1 precautions 5 2 pseudocards 3 11 9 9 R RANGE 2 22 RANGE ke...

Страница 289: ...andard resistance measurements 5 32 STEP key 2 33 STORE key 2 34 key configuration 2 34 switch with DMM operations example 4 13 switching capabilities 1 2 switch only examples 4 13 synchronization AC...

Страница 290: ...Series 3700 System Switch Multimeter User s Manual Index 3700S 900 01 Rev C July 2008 Index 9 V voltage autozero 5 3 calculated measurement 5 48 ISOUR open 5 47 W warm up 5 3 wheel navigation 2 32...

Страница 291: ...Unstable Will not read applied input Overload Calibration only Certificate of calibration required Data required attach any additional sheets as necessary Show a block diagram of your measurement sys...

Страница 292: ...of Keithley Instruments Inc All other trademarks and trade names are the property of their respective companies A G R E A T E R M E A S U R E O F C O N F I D E N C E Keithley Instruments Inc Corporate...

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