6 replies to this topic

[ermips]

Hello,
Is Voltage battery measure single-ended or differential analog reading ?

Thanks

[LabJack Support]

For 1 battery, you would usually do single-ended where you connect the - to GND and the + to AINx.

[ermips]

ok, Thanks for your reply.

And if i have two batteries to check what is the good practise ?

[LabJack Support]

You have to consider ground location and common-mode voltage, among other things:

 

http://labjack.com/s...l-analog-inputs

 

What is the voltage of each battery?  Are they connected in series?  Which LabJack are you using?

[ermips]

Each batterys is  12 V and they 're independent of each other.
Labjack is U3 HV 

[LabJack Support]

If they are independent of each other, the best option is to connect the negatives of both batteries together and run a single wire from there to GND on the U3.  Then connect each positive to an AINx channel to make a single-ended measurement of each.  Note that you need to use the special range (which is -10 to +20 volts), so depending on software that means you need to set the negative channel to 32.

[ermips]

Thanks for your reply. I m going to use this setup.