RKI Instruments 65-2497RK - Manual (Page 16)

12 • 65-2494RK/65-2497RK Oxygen Detector
4. Allow the gas to flow to the detector for 2 minutes.
5. Set the zero reading according to the controller operator’s manual.
6. After setting the zero reading, turn the regulator’s on/off knob clockwise to turn it
off.
7. Unscrew the regulator from the cylinder.
8. Unscrew the calibration cup from the oxygen detector. Make sure that you do not
loosen the detector housing cap when you unscrew the calibration cup.
NOTE: For convenience, leave the regulator and calibration cup connected by the
sample tubing.
9. Allow about 45 seconds for the gas reading to increase above the decreasing alarm
point and then return the controller to normal operation.
NOTE : If you do not allow the gas reading to increase above the decreasing alarm point,
then unwanted alarms may occur.
10. Verify that the controller display reading increases and stabilizes at 20.9% oxygen.
11. Store the components of the calibration kit in a safe and convenient place.