Kaman KDM-8206 - Manual (Page 10)

ZERO
INITIAL CALIBRATION
ZERO
AFTER CONTROL
ADJUSTMENT
TARGET
DISPLACEMENT
+OUTPUT
-OUTPUT
After calibration, the MIN controls can be used to shift system output anywhere from 40-60% below
the x-axis, depending on sensor, sensor mounting and gain. This feature is useful in applications
where a ± deviation from a standard or a bipolar output is required.
The MIN controls can be utilized for final positioning of the output after installing the sensor in it a
mechanical fixture. In general, limit the amount of adjustment to tens of mili-volts of output
adjustment to avoid altering the factory calibration.
4.1.2 MID Controls
The MID controls (Coarse & Fine) affect the change in output of a system in volts due to a given
change in displacement. The MID control sets the sensitivity or scale factor (Volts/mil or mm). The
diagram shows how the slope of the output curve changes as gain is increased and decreased.
INCREASED GAIN
INITIAL CALIBRATION
DECREASED GAIN +OUTPUT
-OUTP
U
T
4.1.3 MAX Controls
The Coarse and Fine MAX controls affect the shape of the system output curve. The closer the
output is to a straight line, the more accurate the measurement readings. When calibrating,
adjustment of the Max controls interacts with the MIN and MID controls. The MAX controls are
primarily used to swing the full-scale endpoint. Due to the effect of the log amp, it will have some
effect on the MID and less effect on the MIN.
Kaman Precision Products PART NO: 860516-001
www.kamansensors.com Last Revised: 6/20/2011
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