61-1020/61-0230 Molecular Property Spectrometer
Maintenance
•
13
Replacing the Detector
1. Turn off the controller.
2. Turn off power to the controller.
3. If the detector is installed in a junction box that is remote from a controller, remove the
junction box cover.
If the detector is installed directly on a controller, open the controller door.
4. For remote installations, disconnect the detector leads from the terminal block in the junction
box. Before removal, note the position of the color coded leads.
For direct installations, disconnect the detector leads from the detector terminal strip in the
controller. Before removal, note the position of the color coded leads.
5. Unscrew the detector from the controller conduit hub or junction box conduit hub.
6. Guide the detector leads of the replacement detector through the controller conduit hub or
junction box conduit hub, then screw the mounting threads of the detector into the hub.
7. If the detector is installed remotely from the controller in a junction box, use a sealant that is
designed for explosion proof installations.
If the detector is installed directly on the controller, apply any thread sealant appropriate
for the application’s environmental rating to the hub and/or detector head.
Slow or No
Response/Diffi
-
cult or Unable
to Calibrate
• Unable to
accurately set the
zero or response
reading during
calibration.
• Detector requires
frequent
calibration.
NOTE:
Under
“normal”
circumstances, the
detector requires
calibration once
every six months.
NOTE:
Some
applications may
require a more
frequent calibration
schedule.
• The calibration
cylinder is low,
outdated, or
defective.
• The detector is
malfunctioning.
1. Verify that the calibration
cylinder contains an adequate
supply of a fresh test sample.
2. If the calibration/response
difficulties continue, replace the
detector.
3. If the calibration/response
difficulties continue, contact RKI
for further instruction.
* If a fresh air environment cannot be guaranteed, apply zero air during the warmup period.
Table 3: Troubleshooting the Combustible Gas Detector (Continued)
Condition
Symptom(s)
Probable Causes
Recommended Actions
