Sensor Troubleshooting_Motion Detector_Sensors_Data Acquisition and Sensors_

Type Classification：: Sicence Popularizing

Data Classification：: Motion Detector

Sensor Troubleshooting

Date Of Publication：2020-02-22 Click-Through Rate：576

Most issues with your Honeywell amplified and unamplified transducers, and transducers with instrument readout, can be resolved with some basic troubleshooting steps.

This section covers some of the common problems that can occur and provides troubleshooting steps you need to resolve the issue yourself.

Unamplified Transducers

Symptom/Problem	Action/Troubleshooting
No output	Verify correct wiring.
	Verify excitation per calibration sheet.
	Make sure pressure, load, etc. is being applied.
	Check strain gage bridge for continuity per calibration sheet.

Erratic/Intermittent	Check electrical connections for discontinuity or damage.
Output or zero drift	Check for isolation resistance between bridge wiring and transducer body.
	Make sure pressure, load, etc. is constant.
	Check stability of excitation power supply.
	Check millivolt output with volt meter.
	Check for RFI/EMI interference.
	Make sure there are no rapid changes in temperature.

Incorrect output	Check actual input and output resistance against calibration sheet data for possible change or open bridge.
Incorrect output	Check zero offset to see if high.
High zero Offset	Usually indicates transducer was overranged beyond specifications. Overranged transducers should be recalibrated.
	Check actual input and output resistance measurements against calibration sheet for possible changes or open bridge.
	Check for possible mechanical preload or damping on transducer body.

Amplified Transducers

Symptom/Problem	Action/Troubleshooting
No output	Make sure power supply voltage meets transducer requirements.
	Check wiring connections and wiring code.
	Check transducer specifications for type of output provided (i.e., voltage, frequency, etc.).
	Make sure pressure, load, etc. is being applied.
	Make sure that the output load is not shorted.
Incorrect zero level	Check for pre-load on transducer.
	Adjust zero or balance control.
	For load cells check mounting fixture bias.
	For pressure transducers, check for orientation bias.
Erratic/Intermittent	Make sure pressure, load, etc. is constant.
Output or zero drift	Make sure power supply remains within specifications.
	Check for RFI interference.
	Make sure there are no rapid changes in temperature.
	Check electrical connections for discontinuity or damage.
	Check output with volt meter.
	Check for insulation resistance between amplifier wiring and transducer shell.
Incorrect output	Check “shunt” calibration output value against calibration sheet and adjust span control per instructions.
	Verify that transducer is being operated within its temperature compensated range.
	Check transducer range on label.
	Check for insulation resistance between amplifier wiring and transducer shell.

Transducers with Instrument Readout

Symptom/Problem	Action/Troubleshooting
Erratic display	Check electrical connections for continuity and wiring code for pin layout.
No display/No output voltage	Check powerline fuse per instrument instructions.
Blinking display	Indicated overload; Ensure wires are all connected and transducer is within its range.
Incorrect readout value	Check transducer range on label.
	Verify that system was set up per instructions. Review setup procedure.
	Refer to transducer troubleshooting guide and verify that transducer operates properly.
	Use shunt-cal to verify calibration.

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