USB-205 - Analogue Channels

[EricW]

Just got a USB-205. If I have an open line on an analogue channel; not connected to anything or an open circuit, I get erratic measurements usually bouncing around 1.75V. I am using this for cable testing where the voltage should go to zero if there is an open circuit / wire break condition.

Is there a way to stop this from happening? 

 

[Fausto]

Hello @EricW.

Channel inputs should not be left open.  Either connect it to ground if not used or to a valid signal or do not select that channel in software.

Regards,

Fausto