| 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 Output or Zero Drift |
Check electrical connections for discontinuity or damage. 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. Make sure there are no rapid changes in temperature. |
| Incorrect Output | Check actual input and output resistance against calibration sheet for possible changes or open bridge. 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 | |
| No Output | Make sure power supply voltage meets transducer reuirements. 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 bias. For pressure transducers, check for orientation bias. |
| Erratic/Intermittent Output or Zero Drift. |
Make sure pressure, load etc. is constant 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 voltmeter. Check for insulation resistance between amplifier wiring and transducer cell. |
| 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 | |
| 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; make sure wires are all connected, and transducer is within its range. |
| Incorrect Readout Value | Check transducer range on label. Verify that system was setup per instructions. Review set-up procedure. Refer to transducer troubleshooting guide and verufy that transducer operates properly. Use Shunt-Cal to verify calibration. |