O2NE+ & Safe-Ox+
User Manual
Int. Approved
Document ref: P0120-820-14
August 2017
Page 16 of 23
Commercial in Confidence
6.4
Proof test
To verify that the system is still operating within specification, you will need the following
equipment:
1) A test gas cylinder containing 17% oxygen in nitrogen, +/-2% tolerance
2) A bump test gas (For Safe-
Ox+™ only) with 23.5% oxygen in nitrogen, +/-2% tolerance
3) 0.5 lpm regulator to suit calibration gas bottle
4) Flow adaptor - Part No: 8000-0069A
Then follow the procedure for the particular instrument type:
6.4.1
Ax
O2NE+™
1) Fit the flow adaptor to the O2 sensor and connect, with tubing, to the 17% oxygen
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 gas to diffuse out of the instrument
sensor, allowing the unit to recover to its normal non-alarm condition.
6.4.2
Ax Safe-
Ox+™
1) Fit the flow adaptor to the O2 sensor and connect, with tubing, to the 17% oxygen
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 gas 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 gas to diffuse out of the instrument
sensor, allowing the unit to recover to its normal non-alarm condition.
6.5
Adjusting alarm set points
The procedure is very similar for setting either Alarm 1 or Alarm 2.
1) Whilst the
O2NE+™/Safe-Ox+™ is switched on, enter technician mode by pressing the
mode switch 3 times. If entered successfully the green LED will flash off for 1.5 seconds
and on for 0.5 of a second.
2)
From technician mode, press the ‘Mode’ switch 2 times to set Alarm 1 or 3 times to set
Alarm 2. The buzzer will bleep on each press. If this is done successfully, the
instrument will show the ‘Fault’ indicator and the appropriate ‘Alarm’ indicator. If this is
done inadvertently, or if another mode is selected, press the ‘Mode’ switch once to
return to technician mode and then repeat this selection.
3) The display will indicate the present value of the alarm.
4)
Press the ‘Mode’ switch twice to proceed to define a new setting, or once to abort and
return to technician mode.
5)
Press and hold the ‘Mode’ switch. The displayed value will count down at approximately
one count per second. Release the switch when the displayed value is equal to the
desired alarm value.
6)
Upon release of the ‘Mode’ switch, the display will continue to show the new value.
Accept the new setting by pressing the ‘Mode’ switch twice, or alternatively ignore the
new setting by pressing the switch once. This will return to the technician mode.
7) To exit from technician mode, press the Mode switch once. The
O2NE+™/Safe-Ox+™
then restarts by performing the normal power on sequence (4 flashes).
