QUESTION
How do I verify the alarms on the O2NE+/ Safe-Ox+ and what does a unit in alarm look/ sound like?
ANSWER
To verify the alarm levels are correctly set, you will need the following equipment:
1. Test gas cylinder containing 100% nitrogen
2. Safe-Ox+ also requires a bump gas with 23.5% oxygen in nitrogen, ±2%tolerance
3. 0.5 lpm regulator to suit the calibration gas bottle
4. Flow adaptor kit - Part No. P0120-651K
Then follow the procedure for the particular instrument type:
Ax O2NE+™
1) Fit the flow adaptor including its gasket to the O2 sensor and connect, with tubing, to the 100% nitrogen cylinder and open the regulator to allow for the flow of gas over the sensor.
2) After a few moments, the 'Alarm 1' alarm should operate, followed a little later by the 'Alarm 2' alarm.
3) Remove the test gas. It will take a little while for the N2 mixture to diffuse out of the instrument sensor, allowing the unit to recover to its normal non-alarm condition.
Ax Safe-Ox+™
1) Fit the flow adaptor including its gasket to the O2 sensor and connect, with tubing, to the 100% nitrogen cylinder and open the regulator to allow for the flow of gas over the sensor.
2) After a few moments, the 'Alarm 2' alarm should operate.
3) Remove the test gas. It will take a little while for the N2 mixture to diffuse out of the Instrument Sensor, allowing the unit to recover to its normal non-alarm condition.
4) Fit the flow adaptor to the O2 sensor and connect, with tubing, to the 23.5% oxygen bump test cylinder and open the regulator to allow for the flow of gas over the sensor.
5) After a few moments, the 'Alarm 1' alarm should operate.
6) Remove the test gas. It will take a little while for the mixture to diffuse out of the instrument sensor, allowing the unit to recover to its normal non-alarm condition.
For a brief demonstration of an Ax O2NE being subjected to an Oxygen depleted gas please watch the video below:
O2NE - 5. Unit alarms from Analox on Vimeo.