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Trimming 4-20 mA via
the Keypad
Calibration
1. In the User Program, scroll to CAL with 4-20 Loop highlighted.
Press [ENT].
2. Scroll to Mode and press [ENT]. In the Mode window, scroll to
Test[Trim] and press [ENT].
3. Return to the Loop window, and scroll to Percent.
4. In the Percent window, use the arrow keys to set the percentage to
100%. Press [ENT]. Record the value shown on the current meter.
5. Now use the arrow keys to set the percentage to 0%. Press [ENT].
Record the value shown on the current meter.
6. Return to the Loop window, and scroll to Base Trim. Press [ENT].
7. Use the arrow keys to enter the base trim value, the value recorded
in step 5. (The loop current should now be the same as the current
meter. It should read 4.0 +/-0.01 mA.) Press [ENT]
8. Repeat steps 3 and 4.
9. Return to the Loop window, and scroll to Span Trim. Press [ENT].
10.Use the arrow keys to enter the span trim value, the value recorded
in step 4. (The loop current should now be the same as the current
meter. It should read 20.0 +/-0.01 mA.) Press [ENT].
11. Return to the Loop window, and scroll to Mode. Press [ENT].
Scroll to Normal, and press [ENT].
March 2004
5-3
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