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Device Faults
Loop Fault
Current loop below fault threshold
Supply Voltage
24 volt power supply voltage too low
Fault
Calibration Fault
bad calibration
Memory Fault
Self-detected memory fault
ADC Fault
Self-detected ADC fault
internal Voltage
Self-detected voltage fault
Fault
Zero Drift
Sensor signal has drifted negative
Temperature
Temperature sensor is out of range
Sensor Fault
Wrong Sensor
Wrong sensor type is installed
Type
Lamp Fault
Open or shorted lamp
Alignment Fault
Open path alignment problem
blocked Optic
Optical path is blocked
Fault
Cal Line Active
Cal line is active at start-up
Sensor Fault
Self-detected fault with the sensor
Noise Fault*
Excessive noise on signal
Align ADC Fault*
Alignment ADC saturated
Align Fault*
Alignment fault
Align Warning*
Alignment warning
DAC Fault
DAC fault detected
General Fault
Unspecified fault
High Fault
Detector output is higher than specified limit
Low Fault
Detector output is lower than specified limit
Dirty Optics
Detector optics are dirty
Start Cal Fault
Calibration fault
*OPECL only.
4.3
Table 4—Troubleshooting Guide - Device Faults
Description
14
Recommended Action
Check 4-20 mA loop wiring for shorts or opens.
Verify proper wiring to the device and correct
voltage output from the power supply.
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.
Return to factory.
Return to factory.
Check supply voltage.
Return to factory.
Device may have been calibrated with background
gas present. Recalibrate the detector. Purge with
clean air if needed.
Return to factory.
Sensor type must match configuration. Change
sensor or configuration.
Replace lamp.
Return to factory.
Align the device as specified in the instruction
manual.
Locate and remove obstruction from the optical
path.
Ensure that the Cal line wiring is not shorted and
the switch is open.
Check sensor wiring.
Calibrate sensor.
Ensure that sensor type matches configuration.
Check OPECL alignment.
Check OPECL alignment.
Check OPECL alignment.
Check OPECL alignment.
Return to factory.
Verify correct power wiring and supply voltage.
Consult the factory.
Verify correct sensor type and calibration.
Verify correct sensor type and calibration.
Perform the cleaning procedure as described in
the detector manual, then perform calibration.
Verify correct sensor type and calibrate.
95-8618
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