PyVisa | Trouble I identifying Resources | Rigol DS1054 | Keithly 2200-20-5

dustin1986 over 2 years ago

Hi I am new to automating lab equipment. I am playing around with an oscope and psu to learn. I am using the usb connections. I am using Manjaro linux. I have the usbtmc driver installed and working. My linux box does see the instruments when I plug them in. However, pyvisa doesnot seem to find them. I just get a long list of ASRL "devices" no way to identify which one is the hardware I attached.

Does pyvisa not see the hardware or is thee another way to find devices?

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charlieo21 over 2 years ago

You can try this.

i = 1
for key, value in rm.list_resources_info().items():
    print('\nInstrument ', str(i), ': ', key)
    print('  Interface type: ', value.interface_type)
    print('  Interface board number: ', value.interface_board_number)
    print('  Resource class: ', value.resource_class)
    print('  Resource name: ', value.resource_name)
    print('  Resource alias: ', value.alias)
    i += 1

dustin1986 over 2 years ago in reply to charlieo21

Thank. Let me give this a try.
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Jan Cumps over 2 years ago in reply to charlieo21

On my Windows PC with Python 3.9, that works:
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dustin1986 over 2 years ago in reply to Jan Cumps

[deleted]
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Jan Cumps over 2 years ago in reply to Jan Cumps

... and after adding a Rigol PSU:

I'm preparing for an analogue blog, related to op-amps , Schmitt triggers, and automating the measurements such a circuit. That's why my instruments are currently plugged in and visa-ready
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dustin1986 over 2 years ago in reply to Jan Cumps

I get this output ( 32 of them. I am only showing the first 2 because if I post the whole output it gets flagged as spam)

Instrument  1 :  ASRL1::INSTR
  Interface type:  InterfaceType.asrl
  Interface board number:  1
  Resource class:  INSTR
  Resource name:  ASRL1::INSTR
  Resource alias:  None

Instrument  2 :  ASRL2::INSTR
  Interface type:  InterfaceType.asrl
  Interface board number:  2
  Resource class:  INSTR
  Resource name:  ASRL2::INSTR
  Resource alias:  None

Jan Cumps over 2 years ago in reply to dustin1986

Indeed, those are serial entries. It does not seem to pick up the scope
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charlieo21 over 2 years ago in reply to dustin1986

It's possible that is a read only access. Check this python - Unable to get full VISA address that includes the serial number - Stack Overflow
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dustin1986 over 2 years ago in reply to charlieo21

I will check out this possibility as soon as I get back from lunch. Many thanks.
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shabaz over 2 years ago

Hi,

This is asking for trouble, having what looks like an entire lab of test equipment all in one network!

You should ask your lab person to provide separate networks (i.e. separate VLANs) for testbeds, otherwise it's just a matter of time before you interfere with someone else's testbed by accidentally connecting to them.

If you have a separate network, then your equipment would be nicely isolated.
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