Input Calibration
3/07 UDC3500 Universal Digital Controller Product Manual 291
5.5 Input Calibration Procedure
Preliminary Steps
• Apply power and allow the controller to warm up for 30 minutes before you calibrate.
• Please read Subsection 5.3 before beginning the procedure.
• Make sure you have LOCK set to NONE. See Subsection 3.4 – Loop 1 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 or 2 is listed in Table 5-12.
Table 5-12 Input Calibration Procedure
Step Operation Press Result
1
Enter Calibration
Mode
Setup
until you see
Upper Display = CALIB
Lower Display = INPUTn [n=1 to 5]
Func
Loop 1/2
You will see:
Upper Display = DISABLE
Lower Display = CAL INn [n=1 to 5]
or
The calibration sequence is enabled and you will see:
Upper Display = BEGIN
Lower Display = CAL INn [n=1 to 5]
At the completion of the sequence, the selection
automatically reverts to disable.
2
Calibrate 0 %
Func
Loop 1/2
You will see:
Upper Display = APPLY
Lower Display = INn ZERO [n=1 to 5]
• 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.
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