Andrea C

Andrea C

Joined: 10/2/2022

  • RE: Series 2200 - USBTMC Error - Device not found

    Tue, 18 Oct 2022 12:54:54 GMT – Series 2200 - USBTMC Error - Device not found
    The link to the post on the older forum does illustrate the procedure to update the firmware on the 2200-60-2 and similar models.
    The firmware update procedure is expecting a connection on the (otherwise factory use only) RS-232 port.

    I'm not sure the revised firmware will address your initial issue of no detection of the USBTMC.
    But it is worth a try certainly.
    I do not expect the SCPI commands to be functional over RS-232;  only USB or GPIB.

    If your PC with NI VISA and that USB cable can detect other instruments (DAQ6510), but not the 2200 power supply, I suspect the 2200 power supply may have a malfunction and requires service.

  • RE: DMM7510 how to use auto-zero once with trigger model?

    Tue, 18 Oct 2022 00:27:28 GMT – DMM7510 how to use auto-zero once with trigger model?
    Do you feel the auto zero needs updated within the 500 second measurement time?  Do you think the instrument is drifting within the 500 seconds?  Is it fully warmed up (1 hr)?
    How much drift are you seeing?

    Auto zero updates every 2 seconds does not seem likely to give benefit.

    If no need to update so frequently, I would just call the auto zero with setting once to force the update then.
    Next command to trigger init the 500 second acquisition.

  • RE: Keithley 7002 switching mainframe with excess noise current

    Tue, 18 Oct 2022 00:15:40 GMT – Keithley 7002 switching mainframe with excess noise current
    Since you have a number of new changes in behavior, I wonder if one of the power supplies in the 7002 is having some trouble.
    The instruction manual on Tek.com for the 7002 has a section on maintenance and running diagnostics.

    On the DB9 connector for the digital IO, a 5V supply is available (pin 2).  Look at that on a scope.  Is it steady DC average value?

    Our service dept will perform functional check and repair of 7002 still.
    https://www.tek.com/en/service-quote

  • RE: 2614b model external output trigger

    Sun, 16 Oct 2022 22:42:50 GMT – 2614b model external output trigger
    Just expanding on the information provided.

    Given that a Keithley SMU is likely to see a few decades of use for perhaps a lot of different tasks, the absence of digital IO for triggering with external equipment is one likely way you will wish you had the 2612B instead of 2614B.

    However, there is still the ability to coordinate the SMU action with bus trigger or sending *TRG command to it after arming it for a task.

    In the attached PDF, I provide a little more detail on it.