Kaman Extreme Environment Sensors - Manual (Page 7)

High Temperature Displacement System
During factory calibration the grounding was maintained via the electronics only.
Further grounding along the cabling or sensor should have minimal effect on the
sensitivity since special high temperature cabling was developed to alleviate this
effect.
Careless handling of the sensor either directly during installation or indirectly during
operation may seriously damage the sensitive front portion of the sensor. Impinging
high velocity debris, including bulk contaminants, may be as injurious as an
impacting target.
The standard "zero" calibrated displacement is the offset as listed in appendix A from
the front of the sensor for safety. This offset can be modified or eliminated by
recalibration. Calibration data furnished with each sensor lists output voltage versus
the absolute displacement values from the face of the sensor. Sensitivity and
linearity performance at elevated temperatures are similar the ambient temperature
record except for a zero shift related to the sensing technique and the properties of
the target material. Typical performance curves for some standard targets are shown
in figures 4, 5, and 6.
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