Maintenance – RKI Instruments 61-0190RK User Manual
Page 10
6 • 61-1003RK/61-0190RK Combustible Gas Detector
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 combustible gas detector. It includes daily, monthly, and biannual
procedures.
Daily
Verify a display reading of 0% LEL at the controller. Investigate significant changes in the
reading.
Monthly
This procedure describes a test to verify that the combustible gas detector responds
properly to the target gas.
WARNING: The controller is not an active gas monitoring device during the response
test procedure.
NOTE:
Performing a response test on the combustible detector may cause alarms. Be
sure to put the controller into its calibration program or disable external alarms
before performing this test
NOTE:
The following procedure assumes the use of a calibration kit which includes a
calibration gas cylinder, a 0.5 LPM fixed flow regulator with an on/off knob, a
calibration cup for the detector, and a short piece of sample tubing to connect the
regulator to the calibration cup.
1.
Place the controller into its calibration program or disable external alarms.
2.
Verify that the controller display reading is 0% LEL.
If the controller reading is not 0% LEL, set the zero reading then continue this
procedure. See the controller instruction manual for directions to set the zero reading.
3.
Screw the calibration cup onto the detector.
4.
Use the sample tubing to connect the regulator to the calibration cup.
5.
Screw the regulator into the calibration cylinder.
6.
Turn the on/off knob on the regulator counterclockwise to open the regulator.
7.
Apply gas to the detector for one minute.
8.
Verify that the reading is within ± 20% of the gas concentration.
NOTE:
If the reading is not within ± 20% of the gas concentration, calibrate the detector
as described in “Calibration” on page 8.
9.
Turn the on/off knob clockwise to close the regulator.