• RE: Using 2450 SMU in 4200 UTM

    Let’s summarize:  you have two older 4200-SCS/F running either WinXP or Win7.
    The 4200 have some SMU and you use KITE software.

    You now have some 2450, 2461 and 2601B and looking for software to operate them.
    Is allocating a Win10 or newer computer not an option?
    If yes, you could use ACS-Basic or KickStart.

    But if constrained to using the 4200 as the computer for the new SMUs, you need to use WinXP vintage tools.

    Does older 4200 have the Microsoft compiler installed and is KULT functional?
    Perhaps walk through the KULT tutorial in the manual to verify it is functional.

    If functional, it has GPIB read and write and you could connect to external SMUs.
    Existing sample libraries on the 4200 for LCR meter would be an example of GPIB to external instrument.
    (newer 4200A supports usb, lan and gpib to external instruments)

    With KULT you can interact with internal 4200 related SMUs and external SMUs over GPIB.
    Just depends on the use case you are trying to support.
  • RE: DAQ6510 OverflowHz/V Issue

    if you put known DC on the channel, does DCV read it correctly?

    For the AC signal, can you close the channel and use the Digitize V function on the signal?
    You can slow the digitizer to 1KHz sample rate and auto aperture to get boxcar average from 1MHz digitizer.
    What does that think you signal looks like?
  • RE: Queue full error in 2636A SUM

    Can you set break points and/or single step your code to identify which line causes an error?
    And what is the error?
    Queue Full means you have a lot of errors.
    Try errorqueue.clear() at start of code.

    If it worked well with older Python, then probably just a syntax issue/mistake in the conversion.
    The SMU has no awareness of what is sending the commands.
  • RE: 6517B

    Have you evaluated the 6517B response to the motion/vibration?  I suggest to remove any cable at triax connector and put metal cap on triax input to shield it.  Use foil if you do not have metal triax cap.  Run your test.  Is 6517B unaware of motion?

    But pertaining to your question, in amps mode, the 6517B is essentially a dead short between HI and LO.  For static situation, if charge is stored on a capacitor and a voltage results, when you connect amps measure….big whoosh of charge, and voltage depleted.
    I would not expect appreciable voltage potential to develop while amp meter is attached.  The voltage burden spec tells you the max expected value.

    is the setup well shielded?

  • RE: 2000

    I disagree about the part availability.
    As a repair part, item TF-245 is available component.  Contact your local Tektronix sales office.
    It is a resistor network in SOIC-16.
  • RE: How can Power Supply behave as a current source? How to access the CC mode of operation?

    In contrast to our SourceMeter products which can directly be current source or voltage source, a power supply is always a voltage source.

    But even for voltage source, there is also the parameter setting for the current compliance limit.
    A power supply can achieve current source (CC mode) behavior by deliberately operating it in current limit.

    Suppose you have a device that is approximately 10Ω and you want to source 100mA through it.
    So you’d expect a 1V potential to develop.
    Configure the power supply for the 100mA limit and ask it to source more than 1V…..let’s say 10V.
    It will not be able to achieve the 10V because it will first encounter the 100mA limit.
    The power supply read back functions will show the appx 1V of potential and the 100mA of current.

  • RE: Differeing behavior between Keithley 2400 and 2450

    Can you post a bit more information about your coding approach?
    I am not fully understanding the situation.

    Not sure this applies, but keep in mind that 2450 will process commands more quickly than 2400.
    So a loop running on PC certainly can blast through more quickly.
  • RE: Keithley DAQ6510 - problems with USB connection

    It seems Windows has not properly associated the DAQ as a USBTMC device.
    Until that is resolved, all the NI VISA based communications will not succeed.

    In Device Manager, can you have it update the driver for the entry?
    Or delete that entry and scan for changes.
    You need Windows to associate the detected USB device as USB Test and Measurement device.

    Sometimes, if a driver is not present when the plug-n-play device is first connected to Windows, Windows will make generic other device association.  With driver installed, need Windows to take a fresh look and make proper associations.
  • RE: High scan rate resistance measurement using Keithley 2010 multimeter ( I do have a 7002 too)

    Your description of connections seems correct.

  • RE: Resistance measurement with a Keithley 2002, how to adjust current sourced

    A multimeter does not typically allow adjustable source current for the ohms measure function.

    To achieve what you describe, you need a current source and then use the dmm to measure voltage to have insight about the R.
    A SourceMeter such as 2450 can be the current source.  It might also serve as the voltage measure, but check the specs against what you need.

    The 2002 is 8.5 digit instrument whereas the 2450 is 6.5 digit.