While doing the AIN reading with U6 Pro, is it OK (that it will not damage LabJack) to apply +/-10V when in 0.01V, 0.1V and 1V range? The specification mentioned there is a built-in amplifier for the AIN channels. If the gain selected for a +10V singal is 1000 for example, how would the the amplifier respond?
Yes that is okay (no damage). The limits from the specs (note 8 in particular) apply regardless of what range you are using:
https://labjack.com/support/datasheets/u6/appendix-a
If you are set to the 0.01V range, a signal of >0.01V will just saturate the amp (not harmful) and return the upper limit.
Thank you very much for the quick respond!