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james zabel

james zabel

Joined: 11/2/2023

  • RE: Triggered Sweep with 2182 and 2400 configured and controlled remotely

    2 years ago – Triggered Sweep with 2182 and 2400 configured and controlled remotely
    Hello,
    Yes, I do have a digital triggering cable between the two devices, and yes, I do have each device individually connected to my computer via an RS232 cable.

    I am configuring the following trigger and sweep settings for the Source Meter found on page 5-12 from the 2182 Manual (Steps 3 & 5). 
    1. # Set up the Keithley 2400 (source meter)
    2. sourcemeter.write("*CLS")            # clear errors
    3. sourcemeter.write("*RST")            # reset
    4. # configure trigger settings...
    5. sourcemeter.write(":ARM:SOUR IMM")   # set Arm-Layer: Arm-In Event to IMMEDIATE
    6. sourcemeter.write(":ARM:OLIN 3")     # set Arm-Layer: Arm-Out TLink Line to #3
    7. # can't find the following control command...  seems to be fine with the default value
    8. # sourcemeter.write(":ARM:")         # set Arm-Layer: Arm-Out Events to OFF
    9. sourcemeter.write(":ARM:COUN INF")   # set Arm-Layer: Arm Count to INFINITE
    10. sourcemeter.write(":TRIG:SOUR TLIN") # set Trig-Layer: Trigger-In Source to TRIGGER LINK
    11. sourcemeter.write(":TRIG:ILIN 1")    # set Trig-Layer: Trigger-In TLink Line to #1
    12. # can't find the following control command...  seems to be fine with the default value
    13. # sourcemeter.write(":TRIG:")        # set Trig-Layer: Trigger-In Event Detect Bypass to NEVER
    14. sourcemeter.write(":TRIG:INP SOUR")  # set Trig-Layer: Trigger-In Events to SOURCE=ON DELAY=OFF MEAS=OFF
    15. sourcemeter.write(":TRIG:OLIN 2")    # set Trig-Layer: Trigger-Out TLink Line to #2
    16. sourcemeter.write(":TRIG:OUTP SOUR") # set Trig-Layer: Trigger-Out Events to SOURCE=ON DELAY=OFF MEAS=OFF
    17. sourcemeter.write(":TRIG:DEL 0")     # set Trig-Layer: Delay to 000.0000 s
    18. sourcemeter.write(":TRIG:COUN 2")    # set Trig-Layer: Trig-Count to 0002
    19. # configure sweep settings...
    20. sourcemeter.write(":SOUR:FUNC CURR")          # set to a current source sweep
    21. sourcemeter.write(":SOUR:CURR:MODE LIST")     # select current sweep mode (this is not set to custom)
    22. sourcemeter.write(":SOUR:LIST:CURR .01,-.01") # sets the number of points to the number of values given
    23. sourcemeter.write(":SENS:VOLT:PROT 21.0")     # set voltage compliance
    I had to simulate button presses to set SWEEP TYPE to CUSTOM and to set SWEEP-COUNT to INFINITE.

    I am also using the following settings for the Voltmeter:
    1. # Set up the Keithley 2182 (voltmeter)
    2. voltmeter.write("*CLS")               # clear errors
    3. voltmeter.write("*RST")               # reset
    4. voltmeter.write("SYST:CLE")           # Flush buffers
    5. voltmeter.write("SYST:AZER:STAT OFF") # Turn off autozero
    6. voltmeter.write(":SENS:CHAN 1")       # set up Ch1 as voltage
    7. voltmeter.write(":TRIG:DEL 0")
    8. voltmeter.write(":SENS:FUNC 'VOLT'")
    9. voltmeter.write(":SENS:VOLT:DELTA ON") # set up Ch1 as differential voltage
    10. voltmeter.write(":SENS:VOLT:NPLC 10")  # use signal averaging
    11. voltmeter.write(":TRIG:SOUR EXT")      # external trigger

  • Triggered Sweep with 2182 and 2400 configured and controlled remotely

    2 years ago – Triggered Sweep with 2182 and 2400 configured and controlled remotely
    Hello,
    I am trying to remotely configure and remotely control (via RS232) a triggered sweep using a Keithley 2182 and a Keithley 2400.  The configuration seems to work fine (though a few items I am configuring with button pushes).  I can provide the commands if warranted...

    To start a triggered sweep by hand, I must first take both devices out of remote mode (press LOCAL), then turn on the output (press ON), and finally press TRIG followed by SWEEP.  I would like to do this through RS232 commands.

    I have tried simulated button presses: 
    1. sourcemeter.write(":SYSTEM:KEY 24") # press the on/off output button
    2. sourcemeter.write(":SYSTEM:KEY 20") # press the trigger button
    3. sourcemeter.write(":SYSTEM:KEY 27") # press the sweep key button
    4. sourcemeter.write(":SYSTEM:KEY 24") # press the on/off output button
    but this does not start the triggered sweep and the 2400 no longer responds to remote commands.

    If you switch the order: 
    1. sourcemeter.write(":SYSTEM:KEY 24") # press the on/off output button
    2. sourcemeter.write(":SYSTEM:KEY 27") # press the sweep key button
    3. sourcemeter.write(":SYSTEM:KEY 20") # press the trigger button
    4. sourcemeter.write(":SYSTEM:KEY 24") # press the on/off output button
    then the 2400 no longer responds to manual button presses and requires a reboot.

    I have also tried the following commands: 
    1. sourcemeter.write(":OUTP:STAT ON") # turn on the output (press the on/off output button)
    2. sourcemeter.write(":INIT")
    3. sourcemeter.write(":SYSTEM:KEY 27") # press the sweep key button
    4. sourcemeter.write(":OUTP:STAT OFF") # turn off the output (press the on/off output button)
    Turning on and off the output works as expected.
    If I send an INIT command between ON and OFF then the device seems to longer respond to remote commands.
    If I send a SWEEP button press then the system locks up as before.

    Is there a way to initiate a triggered sweep from remote commands?

    Thanks.