Troubleshooting/Service
96 UDC2300 Controller Product Manual 12/00
9.2 Current Proportional Output Calibration
Introduction
Calibrate the controller so that the output provides the proper amount of current over the
desired range. The controller can provide an output current range of from 0 to 21
milliamperes and can be calibrated at 4 mA for 0 % of output and 20 mA for 100 % of
output, or any other values between 0 mA and 21 mA.
Equipment Needed
You will need a standard shop type milliammeter, with whatever accuracy is required,
capable of measuring 0 to 20 milliamps.
Calibrator Connections
Refer to Figure 9-1 and wire the controller according to the procedure given in Table 9-1.
Table 9-1 Set Up Wiring Procedure for Current Proportional Output
Step Action
1
Apply power and allow the controller to warm up 30 minutes before you calibrate.
2
Set LOCK in the Tuning Set Up group to NONE.
3
Tag and disconnect the field wiring, at the rear of the controller, from terminals
4 (–) and 5 (+). See Figure 9-1.
4
Connect a milliammeter across these terminals.
24880
Milliammeter
5
4
+
_
+
_
+
_
Figure 9-1 Wiring Connections for Calibrating Current Proportional Output
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