Martel Electronics 135 - Manual (Page 44)

Input Reading in Percent of Scale
This feature allows the input measurements to be displayed as a
percent of scale rather than in engineering units. This allows error
calculations in percent to be quickly calculated.
The feature is accessed through the Setup option InpRdg, and is
normally utilized with output Calibration Points which are also
programmed in percent of scale.
An example would be the testing of a turbine meter transmitter. The
output CalPts would be setup for 0-25-50-75-100 percent and the zero
and full scale frequencies entered. Next the input mA function would
be selected. Press SETUP and select the menu for InpRdg. Enter 4 as
the zero point and 20 as the full scale point.
Step through the CalPts using the INC key and observe the input
readings. The transmitter’s error in percent of scale will be the
observed reading minus the CalPts value. For example, if on the third
calibration point (50%) the input reads 50.15, the error is 0.15% of scale
(50.15-50.00).
Input Functions
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