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Input Calibration
144 UDC2500 Universal Digital Controller Product Manual 4/07
5.5 Input 1 Calibration Procedure
Preliminary Steps
• Apply power and allow the controller to warm up for 30 minutes before you calibrate.
• Please read Subsection 5.4 – Input 1 Set Up Wiring before beginning the procedure.
• Make sure you have LOCK set to NONE. See Subsection 3.4 - Tuning Set Up
Group.
• See
Table 5-1 for Voltage vs. Resistance equivalents or 0 % and 100 % range values.
CAUTION
For linear inputs, avoid step changes in inputs. Vary smoothly from initial value to final 100 % value.
Procedure
The calibration procedure for Input #1 is listed in Table 5-10. The numeric codes are also
listed.
Table 5-10 Input 1 Calibration Procedure (Numeric Code 10000)
Step Operation Press Result
1
Enter Calibration
Mode
SetupSetup
until you see
Upper Display = CAL ( - - - - )
Lower Display = INPUT1 (10000)
FunctionFunctionFunction
You will see:
Upper Display = DIS ( 0 )
Lower Display = CALIN1 (10001)
The calibration sequence is enabled and you will see:
Upper Display = BEGN ( 1 )
Lower Display = CALIN1 (10001)
At the completion of the sequence, the selection
automatically reverts to disable.
2
Calibrate 0 %
FunctionFunctionFunction
You will see:
Upper Display = APLY ( 2 )
Lower Display = IN1ZRO (10002)
• Adjust your calibration device to an output signal equal
to the 0 % range value for your particular input sensor.
See
Table 5-1 for Voltage, Degrees, or Resistance
equivalents for 0 % range values.
• Wait 15 seconds, then go to the next step.