ANALOX O2 Portable Quick Start Manual

O2 Portable
Quick Start Guide
www.analoxgroup.com/products/o2-portable
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1. Introduction
The O2 Portable Oxygen Analyzer is designed to measure oxygen levels in the range
0.1 100% O2.
The Analyzer should be used for cylinder oxygen level verification or for monitoring
a gas mixing panel but should not be used for both. If the Analyzer is used for
measuring the oxygen level in the output from a mixing panel, another O2 Portable
should be used for cylinder verification purposes.
The O2 Portable 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 O2 Portable 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 O2 Portable 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 USE.
2. O2 Compensation chart
The O2 compensation chart should be used to check that the O2 Portable is reading
correctly in hot and humid conditions, as the higher the temperature and humidity
the less atmospheric oxygen there is. An air calibration should be performed prior
to checking any samples and the O2 Portable should be adjusted as per the below
chart.
visit the Analox
O2 Portable
web page
Document ref: MO2-870-01
3. Air calibration
Air calibration is essential before every use and is performed as follows:
1] Ensure that any flow adaptors are removed and the reading on the display has
stabilised.
2] Expose the Analyzer to clean air for two minutes and adjust the calibration knob
until the display reads the correct value using the humidity chart above. If this is not
possible refer to section 5 Troubleshooting and section 6 Maintenance.
3] 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.
5] The Analyzer is now ready for oxygen measurement.
WARNING: THE ANALYZER IS SENSITIVE TO OXYGEN
PARTIAL PRESSURE.
CALIBRATION MUST ALWAYS BE CARRIED
OUT AT THE SAME ATMOSPHERIC PRESSURE
AS OXYGEN MEASUREMENT.
4. Operation
DII flow adaptor
1] The Analox O2 Portable comes complete with the unique DII adaptor which allows
to you to directly apply the Analyzer to the outlet on your nitrox tank.
2] Connect the DII adaptor to the Analyzer by pushing the adaptor over the sensor
turret. The o-ring on the sensor should ensure a comfortable fit.
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 THE CYLINDER VALVE SLOWLY AS HIGH
PRESSURE CAN RESULT IN DAMAGE TO THE
SENSOR.
4] Close the pillar valve after fifteen seconds when a stable reading is observed on
the O2 Portable.
5] If in doubt repeat the procedure taking care to ensure a very low gas flow.
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, THIS WILL
RESULT IN INACCURATE READINGS.
5. Troubleshooting
Symptom Reason
Battery symbol Low battery
No display Switched off
Bad connection
Dead battery
Zero reading Sensor disconnected
Sensor expired
Reading erratic Pressure on sensor
Radio transmission
Sensor old or faulty
Condensation on sensor
Reading does not change Faulty connections
when calibration knob is Sensor failure
turned
Display segments missing Display faulty
Will not calibrate Sensor faulty
Sensor not in air
High altitude
Reading drifts Rapid temperature
change
Solution
Change battery
Switch on
Check display connection
Check battery connection
Check connection Change
sensor
Check flow
Move unit away
Change sensor
Dry sensor face
Check connections,
Change sensor
Return to dealer
Change sensor
Check flow adapter
Calculate percent
equivalent =20.9%xbar
Do not move Analyzer
from one temperature
to another immediately
before use