RKI Instruments 35-3000RK-OXY - Manual (Page 18)

18 • 35-3000RK-OXY Sample-Draw Oxygen Detector
Setting the Zero Reading
1. Screw the dispensing valve onto the 100% N
2
calibration cylinder.
2. Connect the sample tubing from the gas collection bag to the dispensing valve, then
open the tubing clamp.
3. Open the dispensing valve. The gas collection bag begins to fill.
4. Close the dispensing valve when the gas collection bag appears full.
5. Close the tubing clamp, then disconnect the sample tubing from the dispensing valve.
Open the tubing clamp, then connect the sample tubing from the gas collection bag to
the sample-draw detector’s inlet fitting.
6. Allow the sample-draw detector to draw the calibrating sample for 1 minute.
7. Follow the directions in the controller’s instruction manual for setting the zero
(oxygen free) reading.
8. Allow the sample-draw detector to draw out any residual gas in the gas collection
bag.
9. Disconnect the sample tubing from the sample-draw detector’s inlet fitting.
10. Reconnect the incoming sample line to the inlet fitting.
11. Unscrew the dispensing valve from the calibration cylinder.
12. Wait 1 to 2 minutes to allow the oxygen reading at the controller to return to normal,
then return the controller to normal operation.
NOTE: If you do not allow the oxygen reading to return to normal, then unwanted
alarms may occur.
13. Verify that the controller display reading stabilizes at 20.9%.
14. Store the components of the calibration kit in a safe and convenient place.