CALIBRATION PROCEDURE
NI 9219
4-Channel, 24-Bit, Universal Analog Input Module
This document contains information for calibrating the NI 9219. For more information on
calibration, visit
ni.com/calibration
.
Contents
Software.................................................................................................................................... 2
Documentation.......................................................................................................................... 2
Test Equipment......................................................................................................................... 2
Test Conditions......................................................................................................................... 4
Initial Setup............................................................................................................................... 5
Verification............................................................................................................................... 5
Voltage Accuracy Verification......................................................................................... 5
Thermocouple Accuracy Verification .............................................................................. 8
Current Accuracy Verification ......................................................................................... 10
2-Wire Resistance Accuracy Verification ........................................................................ 11
Quarter-Bridge Accuracy Verification ............................................................................. 13
4-Wire Resistance Accuracy Verification ........................................................................ 15
4-Wire RTD Accuracy Verification ................................................................................. 17
3-Wire RTD Accuracy Verification ................................................................................. 19
Half-Bridge Accuracy Verification .................................................................................. 22
Full-Bridge Accuracy Verification................................................................................... 27
Voltage and Thermocouple Accuracy Adjustment .......................................................... 31
Current Accuracy Adjustment .......................................................................................... 32
4-Wire and 2-Wire Resistance Accuracy Adjustment...................................................... 33
4-Wire RTD, 3-Wire RTD, and Quarter-Bridge Accuracy Adjustment .......................... 34
Half-Bridge Accuracy Adjustment................................................................................... 35
Full-Bridge Accuracy Adjustment.................................................................................... 37
EEPROM Update ..................................................................................................................... 38
Reverification ........................................................................................................................... 38
Accuracy Under Calibration Conditions .................................................................................. 38
NI Services ............................................................................................................................... 40