Measurement-computing PCIM-DAS16JR/16 Instrukcja Użytkownika Pobierz pdf (Strona 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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Measurement-computing PCIM-DAS16JR/16 Instrukcja Użytkownika Strona 20