Rockwell Automation 1771-PD PID MODULE (+DU) - Manual (Page 147)

Chapter 5
5Ć12
+lead to TP3
-lead to TERMINAL 8
21. Adjust R18 for a reading of 0.0000V dc.
22. Reconnect the DC voltage standard as follows, set to +5.0000V dc.
+lead to TERMINAL 14
-lead to TERMINAL 8
23. Adjust R17 until the full scale VAD voltage recorded in step 9 is
obtained.
24. Return the E13 programming plug to its factory configured lower
position.
Isolation Amplifiers
Using the following procedure, adjust the offset to zero, gain to 1, and
optimize common mode rejection. Loop 2 information is presented in
parentheses, ie (loop 2). The loop 2 procedure should not be started until
the entire procedure for loop 1 has been completed.
1. Jumper TERMINALS 17 and 18 (15 and 16) to TERMINAL 8.
2. Connect the digital voltmeter as follows:
+lead to TP4 (TP5)
-lead to TERMINAL 8
3. Adjust R19 (R16) for a reading of 0.0000V dc.
4. Remove the jumper from TERMINAL 17 (15), only.
5. Connect the DC voltage standard as follows, set to +5.0000V dc.
+lead to TERMINAL 8
-lead to TERMINAL 17 (15)
6. Adjust R62 (R59) for a reading of +5.0000V dc.