Calibrating Inputs
WBPEEUI240774A0 4 - 3
Calibrating Inputs
Calibration is done at the factory and the calibration data is
stored on the IMASI23 module in nonvolatile memory. No field
calibration is necessary. If, however, field calibration is
desired, use the procedure described in Field Calibration in
this section.
Field calibrate the ASI module with the controller by tuning FC
217. Refer to Appendix C for descriptions of FC 215, 216, and
217. It is necessary to define FC 215 and one FC 216 for each
input channel in a configuration to field calibrate the ASI mod-
ule. In addition, when field calibrating the module, the calibra-
tion type defined in S4 of FC 217 must be consistent with the
input signal type defined in S4 of FC 216. Consider the follow-
ing examples.
Example 1
If calibrating a channel for millivolts or thermocouples, then S4
of FC 217 must be set to zero and S4 of FC 216 must be set to
any one of the millivolt or thermocouple input types. In this
case, S4 of FC 216 must be within the following:
x01 ! S4 < x20
- or -
x60 ! S4 < x99
Example 2
If calibrating a channel for high level voltage, then S4 of FC 217
must be set to one and S4 of FC 216 must be set to one of the
high level voltage ranges (4 to 20 milliamperes is considered
high level input type). In this case, FC 216 should be within the
following:
x40 ! S4 < x60
- or -
S4 = x99
Example 3
If calibrating a channel for RTD mode, then S4 of FC 217 must
be set to two and S4 of FC 216 must be set to any one of the
RTD types. In this case, S4 of FC 216 should be within the fol-
lowing range:
x20 ! S4 < x40
The operator starts, guides, and ends the field calibration with
FC 217. Commands are initiated by tuning this block. The
command errors are provided as an output (N+4) of this
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