Honeywell UDC2500 Product Manual page 159

Step Operation
3 Calibrate 100 %
Check the Cold
4
Junction
Temperature
5 Exit the
Calibration Mode
4/07
Press
You will see:
Function Function Function
Upper Display = APLY ( 2 )
Lower Display = IN1SPN (10003)
•
Adjust your calibration device to an output signal equal
to the 100 % range value for your particular input
sensor. See Table 5-1 for Voltage, Degrees, or
Resistance equivalents for 100 % range values.
•
Wait 15 seconds, and
If ...
you are calibrating a Thermocouple input go to step 4
you are calibrating other than a
Thermocouple input
The calculations for zero and span are now stored and you
Function Function Function
will see:
Upper Display = The cold junction temperature at the rear
terminals
Lower Display = CJTEMP (10004)
The value in the upper display is in tenths of a degree. It is
the current reading of the temperature as measured at the
thermocouple terminals and recognized by the controller.
You can change this value, if it is in error, using the
WARNING: The accuracy of the controller is directly
affected by the accuracy of this value. It is recommended
that this value not be changed under normal circumstances.
The controller stores the calibration constants and exits the
Function Function Function
calibration mode.
then
Lower Lower Lower
Display Display Display
UDC2500 Universal Digital Controller Product Manual
Result
or keys.
Input Calibration
Then ...
go to step 5
145