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95-8618
4.3
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.
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.
