MCTB
182
If the new coefficient value is -1999 or 1999, the calibration failed. Check the source connections and insure
the proper signal is applied. Press the Calibrate button to repeat the process or press the coefficient
display/entry field and enter the previous coefficient value recorded to return the loop/limit back to its previous
state. To skip the input high coefficient calibration or to proceed to the next step after calibration has been
performed, press the “Next” button. The final step of the procedure is calibrating the cold junction.
To calibrate the cold junction, a K-Type thermocouple is required. Connect the K-Type thermocouple source
to the input terminals of the loop or limit control using K-Type thermocouple wire. Adjust the source signal to
0C and allow several seconds for the source signal to stabilize. Record the current calibration coefficient value.
Press the “Calibrate” button to calibrate the cold junction. A dialog will be shown indicating the new coefficient
is being calculated. DO NOT alter the source signal during the process. Once complete, the dialog will close
and the new coefficient value will be shown.
If the new coefficient value is -5.00 or 40.00, the calibration failed. Check the source connections and insure
the proper signal is applied. Press the Calibrate button to repeat the process or press the coefficient
display/entry field and enter the previous coefficient value recorded to return the loop/limit back to its previous
state. To skip the cold junction calibration or to complete the calibration procedure
, press the “Next” button.
Once the calibration steps have been completed, connect a calibration source matching the type of input
configured for the loop/limit control. Adjust the reference signal to the low and high end of the operational range
to verify that the process value matches the reference signal within the accuracy limits for the input type.
Содержание MCTB 4.3
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