How To Install Pyvisa On Windows 10
pyVISA on Windows
21 Oct 2022 - fubar - Sreekar Guddeti
A tutorial on interfacing VISA compatible hardware using python's wrapper module `pyVISA`.
Abstract
Interfacing exam and measurement south
History of VISA
Requirements
- VISA implementation from National Instruments: NI- VISA
- Keithley USB488A and USB488B GPIB drivers
- PyVISA: Python package that is a frontend to the VISA library
NI- VISA
Download: Permanent
Documentation : Permanent
Documentation: Mirror
Keithley GPIB to USB drivers
488A is older version of the GPIB to USB adaptor. The commuter development is supported simply till Windows 7. So if trying to install the driver on later Windows versions, it might get tricky
Newer version is 488B
Download KUSB-488B GPIB driver
Download KUSB-488A GPIB driver
Installation
- Remove the previous installation
- Check the system is clean
- Install the Keithley GPIB2USB drivers
- Install the NI-VISA library
- [Digression] Alternative Installation of VISA library
- Install PyVISA
- Install python virtual environment
It is essential to have no traces of previous installations of either the GPIB2USB drivers or the VISA libraries. This is ensured from checking the device director and installed programs.
In instance PyVISA-py is already installed in a virtual environment, running
python -thousand visa infowill listing the VISA libraries(either NI'southward implementation or PyVISA-py's own pure Python implemenation). This cheque is optional and needed simply if i is non sure if the drivers and VISA libraries are completely uninstalled
Remove the previous installation
Plug the Keithley GPIB-USB adaptor and check the device manager listing. The hardware is non listed.
Check the installed programs. The driver is for KUSB-488B and the hardware is KUSB-USB488A. Hence information technology is non listed. Unplug the adaptor and remove the installed driver.
Check the organisation is clean
Run ` python -m visa info` and see if the sytem is clean and ready for proper installation
Once more plug the the Keithley GPIB-USB adaptor and cheque the device managing director listing. This confirms that the arrangement is ready for a proper installation of hardware.
Install the Keithley GPIB2USB drivers
Ensure the hardware is unplugged
Install the KUSB-488A commuter with version 9.2.0. Co-ordinate to the release notes within the source directory,
information technology is recommended to install the Keithley's adaptor driver kickoff followed by the NI'due south own GPIB-488.2 commuter to avoid vendor design conflict.
Rebooting the computer is a requirement after the completion of installations
Later on reboot, plug the hardware and check if it is installed in the device manager
Install the NI-VISA library
Install the NI'southward implementation of the VISA specification; version 19.0
Uncheck the boosted services provided by NI as these volition just increment the number of unneccessary processes and services running in the groundwork. In the older versions of NI-VISA, the selection to uncheck GPIB-488.2 driver from NI was present in the installer. However the current version automatically checks for the GPIB driver pre-installed and accordingly proceeds with the installation to avert conflict.
After installation, bank check for the installed components. Check that the GPIB driver is from Maintainer GPIB-488 whereas NI-VISA is from NI itself.
A successful installation creates visa32.dll and visa64.dll dynamically linked libraries. DLL files are shareable libraries which can exist ported as it is across systems offering convience of using software without recompiling on new systems. They deed like patches.
After the installation, look out for the install location; commonly the C:\\Windows\system32 and search for visa32.dll and visa64.dll. If they are nowadays there, then PyVISA-py tin discover them without fuss. If they are non present there (for some reason), then proceed to the alternative installation
[Digression] Alternative Installation of VISA library
For some reason, my VISA installation has not generated the DLLs at the location. I searched for visa* (* is called a wild bill of fare evaluating to whatever grapheme gear up like 32.dll or 64.dll) across the WINDOWS directory and institute a visa32.dll at C:\Windows\SysWOW64\visa32.dll.
To demonstrate the portability of DLL files, I copied the visa32.dll to the PyVISA virtual surroundings (described below) and checked for the detection of the visa library.
python -one thousand visa info lists the detection of the visa32 library at the path of the virtual environment.
However the bitness of Python installation (64 fleck) and that of VISA (32bit) practice not match. We need to fix this!
Create a virtual environment
Tools available with us:
32 bit VISAcd
Source: https://baalkikhaal.github.io/2019/10/21/Interface-VISA-hardware-with-Windows-using-Python.html
Posted by: kennedypheine1997.blogspot.com
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