236
Step Operation Press Result
4 Calibrate 100
%
Increment
key or
Decrement
key
You will see Input N Span (N=1 or 2)
l
Adjust your calibration device to an output
signal equal to the 100 % range value for
your particular input sensor. See the table
Voltage, Milliamp and Resistance
Equivalents for Input Range Values for
Voltage, Degrees, or Resistance
equivalents for 100 % range values.
l
Press the function key twice, and if
l
you are calibrating a Thermocouple
input, go to step 5.
l
you are calibrating other than a
Thermocouple input, go to step 6.
NOTE: It is recommended to wait 15
seconds before pressing the function
key for stable readings from the source.
5 Check the
Cold Junction
Temperature
Increment
key or
Decrement
key
The calculations for zero and span are now
stored and you will see Cold Junction Temp N
(N=1 or 2):
The value 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 Increment key or Decrement key.
NOTE: Users must measure the
temperature on the rear terminals before
calibrating the Cold junction.
CAUTION: 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.
Chapter 6 - Input Calibration