Kaman KD-2300 User 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.

Switch

lines.

3. Use an input noise filter to the module.