Kaman KD-2300 - Manual (Page 9)

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Service Information KD-2300 Instruction Manual
Application Information
The system speeds gaging and precision measurements by eliminating
errors caused by “feel”. It uses modern electronics (eddy current
operating principle) to replace LVDT’s, air gages, capacitance systems,
dial indicators, and micrometers.
Applications include precision displacement (proximity) measurements
of shafts, plates, foils, and other ferrous and non-ferrous metal targets.
Environments that have oil, dirt, and humidity between the sensor and
target will not affect the system accuracy. The system output has high
noise immunity (low impedance).
As a non-conductive medium between a sensor and a metal target
doesn’t affect a calibrated system, the thickness of non-conductive
materials (i.e. rubber, plastic, insulation, wood) can be measured when
the material is against metal. If the non-conductive material is moving,
the sensor can be mounted on a rider or shoe and look through to the
metal reference target.
The electrical zero can be offset up to half of the measuring range;
therefore, + and - deviation from a nominal can be obtained.
Long term stability, resolution and thermal stability improve
exponentially as the operating gap between the sensor and target
decreases. Therefore, in extremely critical applications, the first half of
the measuring range permits the best performance.