Agilent 34970A

[anbix]

Hi, I want to use the Agilent 34901A (20 Channel Multiplexer) only to switch between sensors (data will be read by an oscilloscope) and without using the internal DMM. How can I implement the switch in Labview? How can I just close the corresponding channel connected to my sensor, without closing the Internal DMM Input (4W Sense) and without closing the bank switch. So that it is kind of working like the 34903A.

Thanks a lot!

[Jeremy.Peterson · Accepted solution]

You can do this, just leave channels 97 and 98 open to avoid connecting to the internal DMM (see diagram below).

The command to close or open a channel is:

ROUT:CLOSE(@<CHANNEL LIST>)

ROUT:OPEN(@<CHANNEL LIST>)

Note the caveat on the bottom of the snippet below, you must clear the scan list before the instrument will allow you to connect more than one channel at the same time. The command to clear the scan list is:

ROUT:SCAN(@)

I tested this on a DAQ970A which is a newer model but as far as I've seen is functionally identical. It worked fine.

See also:

https://www.keysight.com/us/en/assets/9018-02644/user-manuals/9018-02644.pdf

[anbix]

Tried it out, worked well, thanks!