Honeywell UDC 3300 Product Manual page 242

Step Description
3 Calibrate 100 %
4
Check the Cold Junction
Temperature
CAUTION
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.
5 Exit the Calibration Mode
230
Press
You will see:
FUNCTION
Upper Display
LOOP 1/2
Adjust your calibration device to an output signal equal to
the 100 % range value for your particular input sensor.
See Table 7-1 for Voltage or Resistance equivalents.
Wait 15 seconds, and
The calculations for zero and span are now stored and
FUNCTION
you will see:
LOOP 1/2
Upper Display
Lower Display
C-J TEMP
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
precision 500-ohm resistor, calibrate the cold junction as
77°F (25°C).
The controller will store the calibration constants and exit
FUNCTION
calibration mode.
LOOP 1/2
UDC 3300 Process Controller Product Manual
Action
APPLY
Lower Display
n = 1, 2, or 3
INn SPAN
If...
you are calibrating a
thermocouple input
(Input 1 or 2)
you are calibrating other
than a thermocouple input
The cold junction
temperature at the
rear terminals
or
key.
ATTENTION
When calibrating T/C inputs using a
Then...
Go to step 4
Go to step 5
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