Kaman KD-2300 - Manual (Page 20)

KD-2300 Instruction Manual Part III: The Equipment
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17
Measuring Range
The specified linear measuring range for an inductive system is directly
proportional to the diameter of that sensor. For any given sensor diameter,
unshielded sensors have a greater measuring range than shielded sensors.
This is because the sensor’s field will “couple” with the shield, in effect,
limiting the amount of field available for interacting with the target.
TARGET
TARGET
UNSHIELDED SENSOR
SHIELDED SENSOR
Sensor Mounting
Sensor mounting is critical to the operation and accuracy of the measuring
system. Fixturing must be stable through changing environmental
conditions, such as temperature variation or vibration. The impact of these
changes is relative: a 0.00001" change is negligible when only 0.001"
accuracy is required.
Conductive vs. Nonconductive
Simply keep in mind that fixturing must be capable of maintaining the
accuracy required by your application. If you do need to mount the sensor,
note that the sensor’s field may interact with the fixture and change your
system calibration. Shielded sensors will interact less with a conductive
fixture than unshielded sensors. When using a conductive fixture, it is
important that you calibrate your sensor channels with the sensor in place
in the application fixture, or in a fixture that duplicates the actual loading
effects of the application fixture. Loading is the effect of conductive