RKI Instruments 65-2480RK - Manual (Page 33)

65-2480RK Multi Point Detector • 29
Maintenance
This section describes maintenance procedures. It includes preventive maintenance,
troubleshooting, and component replacement procedures.
Preventive Maintenance
This section describes a preventive maintenance schedule to ensure the optimum
performance of the multi-point detector. It includes daily, monthly, and quarterly
procedures.
Daily
At the controller, verify a display reading of:
• 0 %LEL for combustible gas
• 20.9% for oxygen
• 0 ppm for CO or H
2
S
Investigate significant changes in the display reading.
Monthly
This procedure describes a test to verify that each detector in the multi-point detector
responds properly to its target gas. It describes a test using a fixed flow regulator with an
on/off knob. RKI Instruments, Inc. recommends using a 0.5 LPM (liters per minute) fixed
flow regulator.
NOTE: Performing a response test on the multi-point detector may cause alarms. Be sure
to put the controller into its calibration program or disable external alarms before
performing this test.
Preparing for the response test
1. Place the controller into its calibration program or disable external alarms.
2. Verify that the controller display reading for the channel you are testing is:
• 0 %LEL for combustible gas
• 20.9% for oxygen
• 0 ppm for CO or H
2
S
If the display reading is not the appropriate fresh air reading, set the zero reading of
the detector as described in the Start Up section of this manual, then continue this
procedure.
WARNING: Do not remove the junction box cover or the detector housing cap while the
circuits are energized unless the area is determined to be non-hazardous.
Keep the junction box cover and detector housing cap tightly closed during
operation.
3. Screw the calibration cup onto the bottom of the detector you are testing.
4. Screw the regulator into the calibration cylinder.