Keithley 3700 series User Manual Download Page 100

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In this section:

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 measurements from 0V to 303V

DCI

: DC current measurements from -3.1A to 3.1A

ACI

: AC current measurements from 0A to 3.1A

: 2-wire resistance measurements from 0 to 120M

: 4-wire resistance measurements from 0 to 120M

: Common side ohms resistance measurements from 0

to 120M

FREQ

: Frequency measurements from 3Hz to 500kHz

PERIOD

: Period measurements from 2 s to 333ms

Section 5

Basic Digital Multimeter (DMM) Operation

Summary of Contents for 3700 series

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Page 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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Page 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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Page 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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Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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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Page 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...

Page 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...

Page 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...

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Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

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Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 179: ......

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 209: ......

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 281: ......

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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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Summary of Contents for 3700 series

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