
1/03 UDC 6300 Process Controller Product Manual 231
6.8 Input #5 - Low Level Inputs Calibration Procedure,
Continued
Table 6-7 Input #5 Calibration Procedure, continued
Step Description Press Action
3
Calibrate 100 %
FUNC
L1/L2
You will see:
IN5 SPAN
Lower Display
APPLY
Upper Displa
Adjust your calibration device to an output signal
equal to the 100% range value for your particular
input sensor. See Table 6-1 for Voltage or
Resistance equivalents.
Wait 15 seconds, and
If… Then…
you are calibrating a Go to step 4
Thermocouple input
you are calibrating other Go to step 5
than a Thermocouple input
4
Check the Cold Junction
Temperature
ATTENTION
The accuracy of the
controller is directly
affected by the accuracy
of this value. Change
this value only if the
zero and span
calibration procedures
did not bring the
controller within the
specified accuracy
requirements.
FUNC
L1/L2
The calculations for zero and span are now stored
and you will see:
Lower Display
Upper Display
C-J TEMP
The cold junction
temperature at the
rear terminals
The value in the upper display is in the 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
or
key.
ATTENTION
When calibrating T/C inputs using a
precision resistor, calibrate the cold junction as 77°F
(25°C).
5
Exit the Calibration
Mode
FUNC
L1/L2
The controller will store the calibration constants.
or
LOWR
DISP
To exit the calibration mode.
ATTENTION
Press the [FUNC/L1-L2] key first to
store constants.
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