5V signal on unused channels

[Tobias23]

Hello everyone,

I am using a NI DAQ-Pad 6016 to measure analog voltages on all 8 differential channels. Every once in a while I will only use one or two channels. But when I do that I always get a 5V signal on the unused channels. Can anyone explain why that is?


With regards

Tobias

[Dennis_Knutson]

Read this.

[Tobias23]

It is simple enough, however, to ground channels that would otherwise be floating by simply shorting the positive and negative terminals of the channel.

That's written in the document I was supposed to read and I have already done this. Why do I still get the 5V signal?

[rpursley8]

Shorting the positive and negative terminals together will only make them the same value.  This value is still floating in reference to GND.  I would tie them directly to GND since you are seeing this behavior.

Message Edited by rpursley8 on 01-26-2007 11:14 AM