Kaman KD-2300 - Manual (Page 43)

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Appendix C: Troubleshooting KD-2300 Instruction Manual
1.CAUSE:
Intermittent cable.
This problem is typified by large output changes (full volts vs
millivolts) when the cable is moved.
SOLUTION:
1. Visually inspect the cable,
2. Test it with an ohmmeter and confirm the variable/short problem
while moving the cable,
3. Replace the cable.
2.CAUSE:
Open sensor coil, shorted or open cable.
A short will yield very low to zero voltage while an open will yield
saturation voltage.
SOLUTION:
1. Visually inspect,
2. Test it with an ohmmeter: zero to near zero for a short; infinite to
full scale for a deflection or open. A good sensor will test 1 to 5 ohms
on the average; a sensor/cable combination will be higher.
2. Replace the sensor and/or cable.
3.CAUSE:
Excess loading (static or dynamic) on the sensor caused by the
fixturing.
Conductive material too close to the sensor can cause excess loading.
SOLUTION:
1. If the sensor is mounted in a conductive fixture, make sure that you
have met the requirements outlined in Part 3: EQUIPMENT.
2. Remove any conductive material that you do not want to measure
away from the sensor area.
3. Calibrate for a certain degree of loading. You cannot compensate
for excess loading since it can only be determined empirically.
4.CAUSE:
Noisy AC feed power to the system.
SOLUTION:
1. Check for power tools, motors, soldering irons etc. on the same
line; turn them off or remove them.
2. Switch lines.
3. Use an input noise filter to the module.