RKI Instruments 65-2515RK - Manual (Page 10)

6 • 65-2515RK Oxygen Detector
NOTE: If you can verify that the detector is in a fresh air environment (environment
known to be of normal oxygen content and free of toxic and combustible gases),
it is not necessary to apply zero air when verifying or setting the fresh air
reading.
The procedure below describes applying zero air using a calibration kit that includes a
calibration cup, calibration gas, sample tubing, and a fixed flow regulator with an on/off
knob. RKI Instruments, Inc. recommends using a 0.5 LPM (liters per minute) fixed flow
regulator.
1. Screw the calibration cup onto the bottom of the oxygen detector.
2. Screw the regulator into the zero air calibration cylinder.
3. Use the sample tubing to connect the regulator to the calibration cup.
4. Turn the regulator’s on/off knob counterclockwise to open it. Gas will begin to flow.
5. Allow the gas to flow for two minutes.
6. Verify a reading of 20.9% oxygen at the controller.
If the display reading is 20.9% oxygen, the oxygen detector is in normal operation and
start up is complete. Proceed to step 7 to disassemble the calibration kit.
If the display reading is not 20.9% oxygen, set the fresh air reading according to the
controller’s operator’s manual.
7. Turn the regulator’s on/off knob clockwise to close it.
8. Unscrew the regulator from the zero air calibration cylinder. For convenience, leave
the sample tubing connected to the regulator and the calibration cup.
9. Unscrew the regulator from the cylinder and remove the calibration cup from the
detector.
10. Store the components of the calibration kit in a safe and convenient place.
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 oxygen detector. It includes daily, monthly, and quarterly procedures.
Daily
Verify a display reading of 20.9% oxygen at the controller. Investigate significant changes
in the reading.
Monthly
This procedure describes a test to verify that the oxygen detector responds properly to
oxygen deficiency.
WARNING: The controller is not an active gas monitoring device during the response
test procedure.