RKI Instruments 65-2512RK - Manual (Page 13)

65-2511RK/65-2512RK Oxygen Detector • 9
1. Screw the calibration cup onto the detector housing.
2. Screw the regulator into the zero air calibration cylinder.
3. Use the sample tubing to connect the regulator to the calibration cup.
Setting the Fresh Air Reading
NOTE: If you can verify that the oxygen transmitter is in a fresh air environment, you do
not need to apply zero air to the detector before adjusting the zero reading.
1. Follow the directions in the controller’s instruction manual for setting the fresh air
reading to 20.9% oxygen.
2. When the instructions call for exposing the detector to zero air, turn the regulator’s
on/off knob counterclockwise to open it.
3. Allow the gas to flow to the detector for 2 minutes before continuing with the
instructions. The detector signal should be stable after two minutes.
4. After setting the zero reading, turn the regulator’s on/off knob clockwise to close it.
5. Unscrew the regulator from the zero air calibration cylinder.
NOTE: Depending on the size of your zero air cylinder, it is possible that you will have a
different regulator for the zero air cylinder and the 100% nitrogen cylinder. If
necessary to fit the nitrogen cylinder, change the regulator.
Setting the Zero Reading
1. Screw the regulator into the 100% nitrogen calibration cylinder.
2. Follow the instructions in the controller’s operator’s manual for setting the oxygen
zero reading.
3. When the instructions call for exposing the detector to gas, turn the regulator’s on/off
knob counterclockwise to open it.
4. Allow the gas to flow to the detector for 2 minutes before continuing with the
instructions. The detector signal should be stable after two minutes.
5. After setting the zero reading, turn the regulator’s on/off knob clockwise to close it.
6. Unscrew the regulator from the calibration cylinder.
7. Unscrew the calibration cup from the detector.
NOTE: For convenience, leave the components of the calibration kit connected by the
sample tubing.
Returning to Normal Operation
1. When the display reading rises above the decreasing alarm setpoint, return the
controller to normal operation.
NOTE : If you do not allow the oxygen reading to increase above the decreasing alarm
point, then unwanted alarms may occur.
2. Verify that the controller display reading increases and stabilizes at 20.9% oxygen.