Measurement Computing PCIM-DAS16JR/16 - Manual (Page 20)

Chapter 5
Calibrating the PCIM-DAS16JR/16
The PCIM-DAS16JR/16 is shipped fully calibrated from the factory. For normal environments, you should
calibrate your PCIM-DAS16JR/16 board using InstaCal's calibration procedures every six months-to-a year. If
frequent variations in temperature or humidity are common, recalibrate at least every three months. It requires
less than 20 minutes to calibrate the board using InstaCal.
Calibrating the A/D and D/A converters
InstaCal provides step-by-step on-screen instructions to guide you in calibrating your board. You calibrate the
board's A/D converters by applying a known voltage to an analog input channel and adjusting the board’s trim
pots for offset and gain.
Calibrate the PCIM-DAS16JR/16 for the range you intend to use it in. Slight variations in zero and full scale
may result when the range is changed. These variations can be measured and removed in software, if necessary.
Required equipment
To calibrate the PCIM-DAS16JR/16, you need a precision voltage source, or a non-precision source and a 5½
digit digital voltmeter and a few pieces of wire. Use a jeweler’s screwdriver to adjust the trim pots. An extender
card is not required to calibrate the board.
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