Reading channel saturation

[altami]

The reading of the output of a Wheastone bridge plus amplifier is most of the time wrong, going to the limit values set for the channel. These reading values are not real probably, as the voltimeter doesn´t give so high values.

[srm@viewpointusa.com]

If you are collecting the channel differential, your source may be exceeding the common mode voltage spec of the card which shows up as very high or very low voltages. Your voltmeter will have much better common mode voltage specs allowing better (wider common mode voltage) differential measurements. Use your voltmeter to measure a leg compared to analog ground while measuring with the DAQ card, >15 V common mode is out of range for DAQ card