Rockwell Automation 1771-IR , D17716.5.76 RTD INPUT MODULE - Manual (Page 35)

Module Calibration
Chapter 7
7Ć2
Calibration of the module consists of applying 1.00 ohm resistance across each
input channel for offset calibration, and 402.00 ohm across each input channel
for gain correction.
Offset Calibration
Normally all inputs are calibrated together. To calibrate the offset of an input,
proceed as follows:
1. Connect 1.00 ohm resistors across each input channel as shown in
Figure 7.1.
Figure 7.1
Resistor Location for Offset Calibration
18
16
14
12
10
8
6
4
2
C
B
A
C
B
A
C
B
A
C
B
A
C
B
A
C
B
A
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Channel 1
Channel 2
Channel 3
Channel 4
Channel 5
Channel 6
Terminal
Identification
1.00 ohm Resistor
Repeat for
each
channel
2. Apply power to the module.
3. After the connections stabilize, request the offset calibration by setting bit
00 in block transfer write word 15 and sending a block transfer write to the
module. Refer to Table 7.A.
Performing Auto-calibration