Det-Tronics UD10 FlexVu Explosion-Proof Universal Display Unit - Manual (Page 19)

17 95-8661 4.2
Table 4—Troubleshooting Guide - Device Faults
Device Faults Description Recommended Action
loop Fault Current loop below fault threshold Check 4-20 mA loop wiring for shorts or opens.
Supply Voltage
Fault
24 volt power supply voltage too low
Verify proper wiring to the device and correct
voltage output from the power supply.
Calibration Fault bad calibration
This fault can be caused if the calibration is
allowed to time out. if so, recalibrate.
Ensure that there is enough gas in the calibration
bottle to complete the calibration.
Ensure that the gas being used for calibration is
the correct type and concentration. it must match
the configured setting.
Memory Fault Self-detected memory fault Return to factory.
ADC Fault Self-detected ADC fault Return to factory.
internal Voltage
Fault
Self-detected voltage fault
Check supply voltage.
Return to factory.
Zero Drift Sensor signal has drifted negative
Device may have been calibrated with background
gas present. Recalibrate the detector. Purge with
clean air if needed.
Temperature
Sensor Fault
Temperature sensor is out of range Return to factory.
Wrong Sensor
Type
Wrong sensor type is installed
Sensor type must match configuration. Change
sensor or configuration.
lamp Fault open or shorted lamp
Replace lamp.
Return to factory.
Alignment Fault open path alignment problem
Align the device as specified in the instruction
manual.
blocked optic
Fault
optical path is blocked
locate and remove obstruction from the optical
path.
Cal line Active Cal line is active at start-up
Ensure that the Cal line wiring is not shorted and
the switch is open.
low Cal line Cal line is shorted. Check wiring.
Sensor Fault Self-detected fault with the sensor
Check sensor wiring.
Calibrate sensor.
Ensure that sensor type matches configuration.
noise Fault* Excessive noise on signal Check oPECl alignment.
Align ADC Fault* Alignment ADC saturated Check oPECl alignment.
Align Fault* Alignment fault Check oPECl alignment.
Align Warning* Alignment warning Check oPECl alignment.
DAC Fault DAC fault detected Return to factory.
General Fault Unspecified fault
Verify correct power wiring and supply voltage.
Consult the factory.
High Fault Detector output is higher than specified limit Verify correct sensor type and calibration.
low Fault Detector output is lower than specified limit Verify correct sensor type and calibration.
Dirty optics Detector optics are dirty
Perform the cleaning procedure as described in
the detector manual, then perform calibration.
Start Cal Fault Calibration fault Verify correct sensor type and calibrate.
*oPECl only.