Martel Electronics 235 - Manual (Page 34)

Select either Enable or Disable using the INC/DEC keys and press the
ENT key.
% Error Display
This option allows the user to configure the active input and output
function so the calibrator can internally compare them and display the
% error. For example, assume a 300°F to 1200°F calibrator output and
4-20mA calibrator input. If 300°F is being generated, 0% of scale will be
indicated on the right side of the display and if 4 mA is being received,
0% error will be displayed on the left.
Again assume, for the same signals, a 1200°F calibrator output and a 20
mA input.
This feature is particularly handy when using the pressure modules
because exact pressure need not be achieved or held. Even if the
pressure input is changing, the display will indicate any error between
input and output. For example, assume the calibration of a 0-1500 PSI
P/I transmitter. The configuration would be:
Input Zero = 4
Input F.S. = 20
Output Zero = 0
Output F.S. = 1500
Operation
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Input Dampening
Disable Enable
% error % scale
+0.00% +0.00%
% error % scale
+0.00% +100.00%