Measurement Computing CIO-DAS160x/1x - Manual (Page 35)

7 CALIBRATION AND TEST
Every board was fully tested and calibrated at the factory. For normal environments, a calibration
interval of six months to one year is recommended. If frequent variations in temperature or humidity are
common, recalibrate at least once every three months. It requires less than 20 minutes to calibrate the
CIO-DAS1600.
The A/D is calibrated by applying a known voltage to an analog input channel and adjusting trim pots for
offset and gain. There are three trim pots requiring adjustment to calibrate the analog input section of the
CIO-DAS1600. There are also three pots associated with each of the analog output channels. The entire
procedure is described in detail in the InstaCal
TM , calibration routine.
The CIO-DAS1600 should be calibrated for the range you intend to use it in. When the range is changed,
slight variation in zero and full scale may result. These variations can be measured and removed in
software if necessary.
31