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Series 3700A System Switch/Multimeter User's Manual 

Section 4: Applications 

Example: Take 4-wire ohm measurements using a background scan 

The following examples assume a Keithley Instruments Model 3720 card is installed in slot 4 of a 

Series 3700A. This script scans all the channels in slot 4 and takes 4-wire ohm measurements using 

a background scan. 

Example program code for the Series 3700A 

Code 

Notes and comments 

reset() 

Reset the Series 3700A to factory defaults. 

dmm.func = "fourwireohms" 

Set the DMM function to four-wire ohm 

measurements. 

dmm.setconfig("slot4", "fourwireohms") 

Set the configuration for all channels in slot 4 to 

4-wire ohms. 

scan.create("slot4") 

Create a scan for all channels on the card installed in 

slot 4. 

digio.trigger[1].mode = digio.TRIG_FALLING 

Set up digital I/O line 1 to detect a falling-edge 

trigger. 

digio.trigger[2].mode = digio.TRIG_FALLING 

Set up digital I/O line 2 to detect a falling-edge 

trigger. 

scan.trigger.channel.stimulus = 

scan.trigger.EVENT_MEASURE_COMP 

Set each channel so that it will close with a 

measurement complete event. 

digio.trigger[2].stimulus = 

scan.trigger.EVENT_CHANNEL_READY 

Set digital I/O line 2 to pulse when a channel ready 

event occurs. 

scan.trigger.measure.stimulus = 

digio.trigger[1].EVENT_ID 

Set each measurement to occur with a digital I/O line 

1 event trigger. 

scan.bypass = scan.ON 

Set bypass to on so that the first channel closes 

without taking a measurement. 

4WBuffer = dmm.makebuffer(1000) 

Make a buffer named "4WBuffer" and configure it to 

store up to 1000 readings. 

scan.background(4WBuffer)      

Start the scan and runs the scan in the background. 

Readings are saved to the 4WBffer that was created 

with 

dmm.makebuffer

. 

 

Example: Scan, measure and store 

The following examples assume a Keithley Instruments Model 3723 card is installed in slot 3 of a 

Series 3700A. 
This program code: 

•

 

Scans the entire Model 3723 card 

•

 

Measures DC volts on each channel 

•

 

Stores readings in a buffer called 

DCvoltBuffer

 

NOTE

 

For the Model 3723, the channels are reed relays, while the analog backplane relays are 

electromechanical relays. Therefore, to have the scan run faster, this example sets the scan mode to 

fixed ABR, which closes the backplane relays before scanning starts and keeps them closed during 

the entire scan. 

3700AS-900-01 Rev. A / July 2011 

4-3 

 

Содержание 3700A Series

Страница 1: ...www keithley com E C N E D I F N O C F O E R U S A E M R E T A E R G A Series 3700A System Switch Multimeter User s Manual 3700AS 900 01 Rev A July 2011...

Страница 2: ...gistered trademarks of their respective holders Keithley s standard terms and conditions of sale in effect at the time of acceptance of buyer s order by Keithley shall apply to all purchase of goods a...

Страница 3: ...control and data I O connections are for connection to Category I sources unless otherwise marked or described in the user documentation Exercise extreme caution when a shock hazard is present Lethal...

Страница 4: ...dangers that might result in personal injury or death Always read the associated information very carefully before performing the indicated procedure The CAUTION heading in the user documentation exp...

Страница 5: ...and DAC channel specifiers 2 8 Operating a channel from the front panel 2 8 Viewing the close or open status of a channel 2 9 Emulate a Model 3706 2 10 Channel patterns 2 10 Create a channel pattern 2...

Страница 6: ...alternating scan DC volts and two wire ohms 4 8 Example Thermocouple temperature measurement from the front panel 4 9 Example Thermocouple measurement through the remote interface 4 10 Example TSP Li...

Страница 7: ...able of Contents 3700AS 900 01 Rev A July 2011 iii Error when I try to close a channel 5 2 Switch relays will not close 5 3 Save the present state of the instrument 5 3 LabVIEW driver for the Series 3...

Страница 8: ...receive a tightly integrated switch and measurement system that can meet the demanding application requirements in a functional test system or provide the flexibility needed in stand alone data acquis...

Страница 9: ...o begin creation of applications refer to the User s Manual for a variety of specific examples Reference Manual Includes advanced operation topics and maintenance information Programmers looking for a...

Страница 10: ...Series 3700A is turned off and power is removed from all external circuitry Do not connect signals that will exceed the maximum specifications of any installed switching card If both the rear analog b...

Страница 11: ...range if the minimum voltage spacing is reduced in the external connections For details about how to safely make high energy measurements see High energy circuit safety precautions in the Series 3700...

Страница 12: ...the examples provided in this manual The Keithley Instruments Models 3706A and 3706A S front panels contain the following items 1 The USB port on page 2 2 2 The display on page 2 3 3 The navigation wh...

Страница 13: ...follows the figures For more detailed information about the Model 3706A front panel see the General operation section in the Model 3706A Reference Manual Figure 2 Model 3706A with DMM front panel Figu...

Страница 14: ...s 3700A during operation Figure 5 Series 3700A display during operation 1004 1004 OPN 2 4W OPN 2 4W R AUTO DRY R AUTO DRY OC OC N N REM 4W REM 4W AUTO AUTO 1 4 6 5 3 2 Series 3700A display during oper...

Страница 15: ...es the DMM attribute symbols that may appear on the front panel If the symbol has a value associated with it the third column in the table indicates the value definition DMM attribute symbols Front pa...

Страница 16: ...00A has three status lights on the front panel The 1588 status light indicates 1588 operation If this light is off the 1588 feature is disabled or improperly configured If the light blinks at a one se...

Страница 17: ...and the instrument including firmware revision model name and model number SCAN Allows you to run manage view and reset scan lists DMM Opens the DMM ACTION menu LIMIT Puts cursor in the compliance li...

Страница 18: ...1 A8 A9 B0 B1 Matrix channel examples Specifier Slot number Bank number Row number Column number 1104 1 N A 1 04 11104 1 1 1 04 1203 1 N A 2 03 213A4 2 1 3 104 3112 3 N A 1 12 62101 6 2 1 01 Analog ba...

Страница 19: ...0 1 020 Operating a channel from the front panel CAUTION Hot switching can dry weld reed relays causing them to always be on Hot switching is recommended only when external protection is provided You...

Страница 20: ...any other channels Select CLOSE Open the channel Press OPEN Close a channel and open any other closed channels on the instrument Select CHAN and select EXCLOSE Press ENTER to close the selected channe...

Страница 21: ...se the remote command localnode emulation to set emulation NOTE All other Model 3706A behavior is the same Emulation mode does not affect the changes to the IEEE 1588 features or the response times th...

Страница 22: ...t each character of the name 6 Press the ENTER key to apply the selection 7 Press the EXIT key to leave the menu NOTE Refer to Channel patterns in the Series 3700A Reference Manual for more details Pe...

Страница 23: ...ot contain spaces and they do not persist through a power cycle Channel labels can be up to 19 characters You can set labels only for channels that are installed in the instrument Exercise Create a ch...

Страница 24: ...the names of any user created DMM configurations For more information about user created DMM configurations see Save DMM configurations in the Series 3700A Reference Manual 3 Create a buffer required...

Страница 25: ...model number of the card installed in each slot The model number of a pseudocard is the same as the model number of an actual card except for Model 3732 cards see the Pseudocard support for the Model...

Страница 26: ...nalog backplane connector To take a measurement using the analog backplane connector 1 Connect the resistor to the input terminals 2 Configure the measurement by pressing the FUNC key until 2W is disp...

Страница 27: ...eb interface requires the web browser plug in JavaTM SE Runtime Environment Version 6 or later The instrument web interface uses Java applets and depending on your browser security settings may requir...

Страница 28: ...ent web interface is displayed Web interface home page The home page of the web interface gives you basic information about the instrument including The instrument model serial number firmware revisio...

Страница 29: ...U LAN STATUS PASSWORD Card pages The card pages are interactive pages where you can work with channels in each slot To open a card page on the left navigation click the slot number There is a specific...

Страница 30: ...17 Web interface relay closed To specify the type of close select a Channel Action Type from the box in the upper right before closing a channel The options are Channel Close Close the selected chann...

Страница 31: ...the left select the slot that contains the channels you want to close Figure 18 3700A web interface select slot 2 You must log into the instrument to work with the channels See Log in to the instrume...

Страница 32: ...en operations on channel patterns compared to performing the same operations on individual channels or a list of channels Exercise Create channel pattern Test1Pattern using the Snapshot feature To cre...

Страница 33: ...the web interface 1 Click Pattern above the Channel Action Type box The Channel Pattern Configuration dialog box is displayed 2 Select Test1Pattern from the list at the top of the dialog box 3 In the...

Страница 34: ...ons across channels You can set up a scan using the trigger model to precisely time and synchronize the Series 3700A between channels and multiple instruments You can also use triggers without the tri...

Страница 35: ...steps in the scan For example enter 5 Run the scan You can run a scan in one of several ways Background Runs the scan in the background so that you can perform other tasks while the scan is running Yo...

Страница 36: ...starts and at what rate triggers will occur You can select the trigger to use to continue channel action for each scan The options to continue channel action are Immediate When immediate is selected t...

Страница 37: ...use TSB Embedded or TSP Express make sure you have the JavaTM SE Runtime Environment JRE Version 6 or later installed on your computer Create a script using TSB Embedded NOTE If you are using TSB Emb...

Страница 38: ...ded 2 You must log in to the instrument to use TSB Embedded After logging in you can access the options on the TSB Embedded page 3 To create the example script enter the name CardStats in the TSP Scri...

Страница 39: ...er digio 1 then print Start digital i o channel is slot SlotNumber startchannel digitalio print End digital i o channel is slot SlotNumber endchannel digitalio else print no digio channels end if slot...

Страница 40: ...t Script to USB Place a flash drive in the USB port on the front panel of the instrument In TSP enter the name as appropriate and click OK Scripts are saved to a file with the extension tsp TSP files...

Страница 41: ...interface 3700AS 900 01 Rev A July 2011 3 15 6 To resend a command click the arrow on the left side of the Console box Figure 27 Web interface console More information about commands that can be used...

Страница 42: ...to its factory default value which may or may not be 0 Example Scan the card with no measurement switch only The following examples assume a Keithley Instruments Model 3720 card is installed in slot 3...

Страница 43: ...r which a measurement is integrated to 0 1 This helps improve measurement quality by canceling line noise dmm configure set measureDCV Save the DMM configuration as measureDCV DCVbuffer dmm makebuffer...

Страница 44: ...ment complete event digio trigger 2 stimulus scan trigger EVENT_CHANNEL_READY Set digital I O line 2 to pulse when a channel ready event occurs scan trigger measure stimulus digio trigger 1 EVENT_ID S...

Страница 45: ...osed at the start of the scan and maintained closed throughout the scan without being opened or closed scan create 3001 3060 DCVreadings Create a scan list of channels 1 to 60 on slot 3 scan backgroun...

Страница 46: ...ist of channels 1 to 60 on slot 1 scan scancount 10 Set the scan count to 10 scan execute reading_buffer Scan in the foreground dmm savebuffer reading_buffer usb1 mydata csv Write the data out to a fi...

Страница 47: ...function to DC volts with a range of 100 mV line sync of 0 NPLC of 0 0005 no autodelay no autozero and set to measure once Output the last measurement taken buf dmm makebuffer 30 buf clear buf append...

Страница 48: ...my 1Vac buf dmm makebuffer 200 buf clear buf appendmode 1 Set the buffer size set to 200 readings clear the buffer and set the readings to be appended to the existing buffer content scan create 4004 4...

Страница 49: ...channel OFF Set the connect rule off The instrument closes relays as efficiently as possible to improve speed performance without applying a rule dmm func dcvolts dmm range 10 dmm nplc 0 0005 dmm auto...

Страница 50: ...the navigation wheel or the ENTER key Turn the navigation wheel to scroll to the THERMOCOUPLE temperature connection and press the ENTER key Turn the navigation wheel to select the desired thermocoupl...

Страница 51: ...Note that x x prints reading and time vertically so you can copy and paste the information into Microsoft Excel Example TSP Link and interactive triggers This example uses a TSP script to configure an...

Страница 52: ...gure the TSP Link communication interface each instrument must have a unique TSP Link node number Configure the node number for the Series 3700A to 1 and the SourceMeter Instrument to 2 To set the TSP...

Страница 53: ...s example can be run using TSB Embedded The Series 3700A sends all commands in the shaded rows to the System SourceMeter instrument through the TSP Link interface Commands in unshaded rows are execute...

Страница 54: ...tion during the sweep node 2 smua trigger measure v node 2 smua nvbuffer1 node 2 smua trigger measure action node 2 smua ENABLE Configure sweep voltage measurements Enable voltage measurements during...

Страница 55: ...ete an output trigger is asserted on TSP Link line 1 waitcomplete node 2 smua source output 0 channel open allslots print done After all switch and measure actions have completed turn off the SMU outp...

Страница 56: ...e been completed Set up communication In this example in addition to the TSP Link interface serving as a communication bus it will also serve as triggering bus to enable hardware handshaking between t...

Страница 57: ...nnels 2 1003 1204 muxChannels 3 1005 1206 muxChannels 4 1007 1208 muxChannels 5 1009 1210 muxChannels 6 1011 1212 for i 1 6 do scan addimagestep muxChannels i end Add entries to the table Use the valu...

Страница 58: ...mua trigger measure action node 2 smua ENABLE Configure sweep voltage measurements Enable voltage measurements during the sweep node 2 smua trigger count 11 node 2 smua trigger arm count 6 Set trigger...

Страница 59: ...To retrieve data from the System SourceMeter instrument through TSP Link use the printbuffer command to print the data to the computer communication interface An example is shown below Example Retrie...

Страница 60: ...res the System SourceMeter instrument and turns on its output Initiate the System SourceMeter so that it is ready to sweep once a trigger signal is received Note that the output turns on but no power...

Страница 61: ...me is a Lua function that can be used to return the current time or convert a local date and time to UTC based seconds elapsed since January 1 1970 When used without parameters os time returns the cur...

Страница 62: ...s over any remote interface and not just LAN To initiate a specific action at the firing of the alarm you must use the event identifier for the scheduled alarm schedule alarm N EVENT_ID as the stimulu...

Страница 63: ...lative offset enable off autozero off and autodelay off Name this DMM configuration dc_10V and set it as the DMM configuration for measurements on channel 14 on slot 1 dmm range 100e 3 dmm nplc 0 0005...

Страница 64: ...acy DMMs The pull up of the Series 3700 is too strong on lines 1 to 9 scan trigger sequence stimulus scan trigger EVENT_CHANNEL_READY Allows the trigger model to drop to next layer immediately scan tr...

Страница 65: ...PC Labview to wait for the scan to finish digio trigger 4 wait 5 Waits up to 5 seconds for the last CHANNEL_READY digital I O 4 to be triggered digio trigger 2 assert Triggers measurement on an exter...

Страница 66: ...rel enable dmm OFF dmm autozero 0 dmm linesync 0 dmm offsetcompensation dmm OFF dmm autodelay dmm OFF dmm measurecount 1000 Determines the DMM settings dmm measurecount display prompt 00000 Meas_Cnts...

Страница 67: ...nits 1 Creates stdev numeric to string variable e for expodential f for floating point String variable formatted with four leading digits and 4 digits after decimal point display clear display settext...

Страница 68: ...autorange on an NPLC of 0 005 autozero off and autodelay off dmm configure set commonside4w Name this DMM configuration commonside4w dmm setconfig 1038 1039 commonside4w Set the configuration as the D...

Страница 69: ...ce Manual Need different line frequency or voltage I need to use a Series 3700A at a different line frequency or voltage What do I need to do The Series 3700A only supports a line frequency of 50 or 6...

Страница 70: ...hod and you have a one to one connection between the instrument and the computer verify that the computer is set to receive an IP address automatically If you are using the manual configuration method...

Страница 71: ...en Switch relays will not close Why are the switch relays not closing Verify that the system power is sufficient to close the switch relays Check the front panel or script output for error that might...

Страница 72: ...Series 3700A for your real world applications For more detailed information about the Series 3700A refer to the Keithley Instruments Series 3700A Reference Manual part number 3700A 901 01 For informat...

Страница 73: ...ress 5 2 J Java plug in 3 1 K Keys 2 5 L LabVIEW drivers 5 3 LXI Discovery Tool 3 1 Downloading from website 3 1 M Manuals 1 2 matrix card notation 2 7 Measure and switching capabilities 1 3 capabilit...

Страница 74: ...ge without notice All Keithley trademarks and trade names are the property of Keithley Instruments Inc All other trademarks and trade names are the property of their respective companies A G R E A T E...

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