Pressure Systems 9022 - Manual (Page 125)

Pressure Systems, Inc. NetScanner™ System (9016, 9021, & 9022) User’s Manual
www.PressureSystems.com 4 - 15
4.5.2 Calibration Procedure
The calibration procedures may be summarized as follows:
1. Set all 9021/9022 channels for the desired gain (1, 20, 45, or 90).
(9022 temperature voltage input gain is fixed at gain = 1)
2. Apply a known upscale or full scale voltage to the 9021/9022.
3. Measure the applied voltage through the 9021/9022.
4. Calculate the 9021/9022 measurement error as a ratio of applied voltage.
5. Adjust the current reference network coefficient by the observed measurement error ratio.
6. Store the new coefficients to non-volatile 9021/9022 memory.