ANALOX O2 Portable User manual

Analox Limited
15 Ellerbeck Court, Stokesley Business Park,
North Yorkshire, TS9 5PT, UK
UK/RoW T: [phone] F: [phone]
US T: [phone]
W: www.analoxsensortechnology.com E: [email protected]
Copyright © 2017 Analox Ltd. All Rights Reserved.
O2 Portable
User Manual
Commercial in Confidence

O2 Portable
User Manual Int. Approved
Document ref: MO2-807-05 December 2017 Page 1 of 18
Copyright © 2017 Analox Ltd. All Rights Reserved.
Commercial in Confidence
List of Contents
1Introduction ................................................................................................................. 3
2Controls....................................................................................................................... 4
2.1 Controls of the O2 Portable..................................................................................... 4
3Calibration ................................................................................................................... 5
3.1 Air calibration ....................................................................................................... 5
3.2 Pure oxygen calibration for measuring oxygen purity up to 100%................................ 5
4Operation .................................................................................................................... 6
4.1 Universal flow adaptor ........................................................................................... 6
4.2 DII flow adaptor .................................................................................................... 6
5Troubleshooting............................................................................................................ 7
6Maintenance................................................................................................................. 8
6.1 Battery replacement. ............................................................................................. 8
6.2 Sensor replacement............................................................................................... 8
6.3 Care of the O2 Portable.......................................................................................... 9
7Safety Information O2 Portable .................................................................................... 10
7.1 Battery .............................................................................................................. 10
7.2 Sensor ............................................................................................................... 10
7.3 Sensor Handling Information. ............................................................................... 10
8Warranty ................................................................................................................... 11
9Specifications ............................................................................................................. 12
10 Spares & accessories............................................................................................... 13
10.1 Spares ............................................................................................................... 13
10.2 Accessories......................................................................................................... 13
11 Disposal ................................................................................................................ 14
12 Declaration of conformity......................................................................................... 15

O2 Portable
User Manual Int. Approved
Document ref: MO2-807-05 December 2017 Page 2 of 18
Copyright © 2017 Analox Ltd. All Rights Reserved.
Commercial in Confidence

O2 Portable
User Manual Int. Approved
Document ref: MO2-807-05 December 2017 Page 3 of 18
Copyright © 2017 Analox Ltd. All Rights Reserved.
Commercial in Confidence
1Introduction
The O2Portable Oxygen Analyser is designed to measure oxygen levels in the range 0.1 100% O2.
The analyser should be used for cylinder oxygen level verification or for monitoring a gas mixing
panel but should not be used for both. If the analyser is used for measuring the oxygen level in the
output from a mixing panel, another O2Portable should be used for cylinder verification purposes.
The O2Portable has a large digital display and operates from an internal temperature compensated
3-year life (Expected) electrochemical oxygen sensor. Power is provided by a 9V, 4000-hour life
battery giving up to 3 year operation before replacement is necessary.
The O2Portable is a water-resistant drop resistant totally self-contained unit designed specifically
for all the diving industry Sport (NITROX), Commercial and Military where hostile environmental
conditions are the norm not the exception.
Your O2Portable is supplied ready to use. On receipt of the unit, please check for damage. If there
is any damage, contact your supplier.
WARNING
It is important that
these instructions are read
before the analyser is used!

O2 Portable
User Manual Int. Approved
Document ref: MO2-807-05 December 2017 Page 4 of 18
Copyright © 2017 Analox Ltd. All Rights Reserved.
Commercial in Confidence
2Controls
2.1 Controls of the O2Portable
2.1.1 The analyser is fitted with an on/off switch located on the front of the unit. Push the switch
up or down to turn the unit on and return it to the central position to turn it off. When it is
switched on the analyser's display will show an oxygen reading but do not use before
calibration (see section 3.0).
2.1.2 The low battery warning is a battery symbol in the corner of the display. When present,
change the batteries before using the instrument (see section 8.0 Maintenance).
2.1.3 A waterproof calibration knob is located on the front. Turn it fully from left to right and then
fully left, the reading should increase and then decrease. (If the reading does not change
see section 8.0 Maintenance).
WARNING
Do NOT use when
the LOW BATTERY symbol is on!
ANALOX O2PORTABLE OXYGEN ANALYSER

O2 Portable
User Manual Int. Approved
Document ref: MO2-807-05 December 2017 Page 5 of 18
Copyright © 2017 Analox Ltd. All Rights Reserved.
Commercial in Confidence
3Calibration
3.1 Air calibration
3.1.1 Air calibration is essential before every use and is performed as follows.
3.1.2 Ensure that any flow adaptors are removed and the reading on the display has stabilised.
3.1.3 Expose the analyser to clean air for two minutes and adjust the calibration knob until the
display reads the correct value using the humidity chart (You can find the humidity chart on
the inside of the back cover). If this is not possible refer to paragraph 3.4 or to section 8.0
Maintenance.
3.1.4 It is possible that at very high altitude normal calibration is not achievable. In this event
you must ascertain the actual pressure in BAR and multiply the atmospheric oxygen percent
(20.9%) by this pressure and set the reading during calibration to the calculated level
(this is the surface equivalent oxygen percentage). When you measure the level of
oxygen in the sample you must divide the reading by the same atmospheric pressure value
to obtain the true percentage of Oxygen in your sample.
For Example: At an atmospheric pressure of 0.8 BAR the surface equivalent oxygen
percentage is 20.9% x 0.8 = 16.7%O2 Surface Equivalent. If the reading you then
obtain from your sample is 32.0% you must divide this by 0.8 to obtain the true
Oxygen percentage, 32.0/0.8 = 40.0%O2 True Percentage.
3.1.5 The analyser is now ready for oxygen measurement.
WARNING
The analyser is sensitive to oxygen partial pressure.
Calibration must always be carried out at the same
atmospheric pressure as oxygen measurement.
3.2 Pure oxygen calibration for measuring oxygen purity up to 100%.
3.2.1 Connect 100% bottled oxygen (Certified) to the universal flow adaptor (Available as an
accessory, see section 10.2) and adjust the flow rate to between 0.5 and 1.0 litre per minute.
3.2.2 Allow the reading to settle.
3.2.3 Expose to atmosphere, the reading should display +/- 0.4 of corrected humidity value i.e.
between 20.5 and 21.3

O2 Portable
User Manual Int. Approved
Document ref: MO2-807-05 December 2017 Page 6 of 18
Copyright © 2017 Analox Ltd. All Rights Reserved.
Commercial in Confidence
4Operation
4.1 Universal flow adaptor
Note: The universal flow adaptor is available as an accessory, see section 10.2
4.1.1 Connect the universal flow adaptor to the sensor and pass the gas to be analysed over the
sensor slowly at 0.5 to 1 litre per minute until the reading stabilizes. There should be no
significant rapid change in reading when the gas flow is stopped as this indicates that the
flow was too high and the sensor pressurized. If a rapid change is seen within 2 or 3 seconds
of the gas being turned off, repeat at a lower flow.
4.1.2 When a stable reading is observed with the gas flow on and 2 to 3 seconds after being turned
off, take the reading.
4.1.3 Note that after a few seconds of the gas flow being stopped the reading will begin to change
towards the level in the surrounding air of 20.9% O2 you should therefore take the reading
while flow is on.
WARNING!
Do not pressurise the sensor as inaccurate readings will result.
4.2 DII flow adaptor
4.2.1 The Analox O2Portable comes complete with the unique DII adaptor which allows to you to
directly apply the analyser to the outlet on your nitrox tank.
4.2.2 Connect the DII adaptor to the analyser by pushing the adaptor over the sensor turret. The
O ring on the sensor should ensure a comfortable fit.
4.2.3 Hold the DII adaptor firmly against the cylinder outlet facing you. Very slowly open the pillar
valve until gas can just be heard hissing through the flow adaptor.
WARNING
Open cylinder valve
EXTREMELY CAREFULLY
4.2.4 Close the pillar valve after fifteen seconds when a stable reading is observed on the O2
Portable.
4.2.5 If in doubt repeat the procedure taking care to ensure a very low gas flow.
4.2.6 Note that after a few seconds of the gas flow being stopped the reading will begin to change
towards the level in the surrounding air of 20.9% O2 you should therefore take the reading
while flow is ON.
WARNING
Do not pressurise the sensor
as inaccurate readings will result.

O2 Portable
User Manual Int. Approved
Document ref: MO2-807-05 December 2017 Page 7 of 18
Copyright © 2017 Analox Ltd. All Rights Reserved.
Commercial in Confidence
5Troubleshooting
SYMPTOM
REASON
SOLUTION
Battery symbol
Low battery
Change battery
No display
Switched off
Bad connection
Switch on
Check display connection
Check battery connection
Zero reading
Sensor disconnected Sensor
expired
Check connection Change
sensor
Reading erratic
Pressure on sensor
Radio transmission
Sensor old or faulty
Condensation on sensor
Check flow
Move unit away
Change sensor
Dry sensor face
Reading does not
change when
calibration knob is
turned
Faulty connections Sensor
failure
Check connections Change
sensor
Display segments
missing
Display faulty
Return to dealer
Will not calibrate
Sensor faulty
Sensor not in air
High altitude
Change sensor
Check flow adapter
Calculate percent
equivalent =20.9%xbar
Reading drifts
Rapid temperature change
Do not move analyser from
one temperature to another
immediately before use

O2 Portable
User Manual Int. Approved
Document ref: MO2-807-05 December 2017 Page 8 of 18
Copyright © 2017 Analox Ltd. All Rights Reserved.
Commercial in Confidence
6Maintenance
6.1 Battery replacement.
a) Remove the 4 screws located at each corner of the unit and carefully lift the lid.
b) Slide the battery out of its spring bracket and disconnect the lead.
c) Connect the lead to the new battery and slide the battery behind the spring bracket.
d) Replace the lid carefully and screw down taking care that the sensor locates properly.
e) Ensure that you do not trap any wires.
6.2 Sensor replacement.
a) Replacement sensor part number: 9100-9212-5AD
b) Remove the 4 screws located at each corner of the unit and carefully lift the lid.
c) Remove the flow adapter if fitted and slide the sensor out of the lid.
d) Disconnect the in line sensor connector.
e) Dispose of the old sensor according to local regulations for Lead and Potassium Hydroxide
solution.
f) Remove the new sensor from its bag and check it for leaks, connect to the inline connector
and slide through the lid.
g) Replace the lid carefully and screw down taking care that the sensor locates properly. Ensure
that you do not trap any wires.