Maintenance
2106M0525 Iss 2 Nov 05 27
Fault Finding
The following table provide fault finding information. Readings are seen at the controller.
Contact Honeywell Analytics if the problem isn't resolved, see back page for contact information.
Symptom Action Reference
False/inconsistent
reading(s)
Check:
1. Detector wiring/grounding
2. Sensor filter condition — replace if dirty
3. Sensor expiration date
See page 26
Reading non-zero
all the time
Check to ensure that there is no target gas in the
atmosphere. Background or other volatile organic
gases, e.g. solvents, can interfere with the
operation of the sensor.
Reading non-zero with no
gas present
Adjust the zero setting at the controller.
Controller’s user
document
Reading low when
gas applied
Adjust the span setting at the controller.
Controller’s user
document
For oxygen versions, check that the protective
plug has been removed from the cell and the RFI
screen and filter have been fitted.
See page 17
Reading high when gas
applied
Adjust the span setting at the controller.
Controller’s user
document
Reading zero when gas
applied
Check the sensor Protective Disc, fitted to the cap
when the sensor is supplied, has been removed.
See page 17
For oxygen versions, also check that the
protective plug has been removed from the
sensor cell and the RFI screen and filter have been
fitted.
See page 17
Check that the filters are not blocked.
Replace the sensor if failure is suspected. See page 22
Cannot adjust span or
zero
No adjustments can be made at the detector, only
at the controller.
Controller’s user
document
Calibration fails at
controller
Replace detector See page 22
To Next Page
Loading...
