RKI Instruments 61-1000RK - Manual (Page 11)

61-1000RK Combustible Gas Detector • 7
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 quarterly
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 length of sample tubing.
Preparing for the response test
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 operator’s manual for directions to set the zero reading.
3. Screw the regulator into the calibration cylinder.
4. Screw the calibration cup onto the bottom of the detector.
5. Use the calibration kit sample tubing to connect the regulator to the calibration cup.
Performing the response test
1. Turn the regulator’s on/off knob counterclockwise to open the regulator. Gas will
begin to flow.
2. Allow the gas to flow for one minute.
3. Verify that the reading is within ± 20% of the gas concentration.