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MCT-CM
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10.11 Monitor Offset Calibration
The monitor option provides up to 15 additional process inputs, which can be configured from any combination
of thermocouple, analog and RTD inputs from the optional monitor input modules. The monitor input option
can also be configured to display the second input from compatible loop controllers attached to the system (one
from each available control loop).
The calibration range is fixed within the thermocouple, analog and RTD monitor input cards; however, the user
can input a linear offset in order to adjust for sensor tolerances and lead affects. When the second input of a
control loop is used for the monitor input, the loop controller provides calibration, range and input bias
adjustments. The input bias of the loop control can be used to set the linear offset for the input, or the monitor
offset calibration of the MCT can be used.
The left and right navigation buttons at the upper right of the screen allow the user to scroll through each
available monitor input. To adjust the input reading, enter the offset value in the ‘Offset’ field and verify the
reading. The offset range is -32760 to 32760 for a decimal point resolution of zero, -3276.0 to 3276.0 for a
decimal point of one, -327.60 to 327.60 for a decimal point of two and -32.760 to 32.760 for a decimal point
resolution of three. Be sure to press the ‘Save’ button to save the new offset value before proceeding onto
other inputs or exiting the monitor input offset screen or the offset value will revert back to its original value.
NOTE: If using the monitor input offset of the MCT to offset the reading for the second input of a loop control,
the value for the monitor input as shown on the MCT
will not match that on the loop controller’s display.
The monitor input offset of the MCT only offsets the reading on the display, not on the loop control.
Therefore, to avoid confusion when using the second input of the loop controls for monitor points, it
is recommended that any input offset is applied through the loop controller’s input bias setting and
not the monitor input offset of the MCT.
10.12 Display Settings
The Display screen provides access to the touch screen calibration utility, back light settings and alarm volume
adjustment.