Instrument Control (GPIB, Serial, VISA, IVI)

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Keithley 2400 is not identified on device manager/NI MAX

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I have connected the Keithley 2400 to my PC using a RS232-USB adapter, and my PC cannot identify the device.

On the device manager, it is not listed under COM, but instead it is listed as "USB-Serial Controller" as on the screenshot file below. NI MAX does not identify the device either. 


Can anybody help me on this issue?

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Accepted by topic author YeonsooPark

It looks like the drivers aren't properly installed in windows.  What kind of RS232-USB adaptor?   


Each manufacturer of the RS232-USB adaptor usually provides its own Windows drivers you have to install.

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