Concerning SCXI 1121 and 1321..gain settings

[JLy]

I am reading in a 0 to 30 millivolt signal. I have the jumpers set to 100. In max I still only read in 0 30 millivolts. Isn't it supposed to be 0 to 3 volts?

I have the 1321 hooked up to an omegadyne LCH series load cell. I can not null the offset. I tested the potentiometer and it is working. Why am I not able to null the offset. The jumpers are enabled.

[Jeremy_C]

Even though a gain of 100 is applied to a signal, the driver actually automatically adjusts the value back to the original range after the analog to digital conversion. The gain is applied prior to the A to D conversion in order to take advantage of the full range of the A to D converter in order to maximize resolution. As for the null offset, I would recommend taking a look at the LabVIEW example below that illustrates how to accomplish this. Respond if you still have problems.

Example