Oceanic Geo 2.0 Online Cl

Oxygen sensor calibration

Instructions and examples on how to use cootwo

Oxygen sensor calibration

Postby eDiver » Mon Nov 23, 2015 6:37 pm

It is a good practice to calibrate the Oxygen sensor frequently.

With cootwo you can perform an Oxygen sensor calibration either with the stand-alone unit or with the assistance of a smartphone.

The stand-alone O2 calibration is limited to air and it is time based while the smartphone assisted O2 calibration has more flexibility; as an example you can use 2 user-programmable gas mixes, you can check for validity ranges and even use the Auto-Estimation feature available in the My Nitroxbuddy app.

During an Oxygen sensor calibration it is very important to expose cootwo to a known source of gas flowing at a constant rate.

The most accurate results are achieved by using a BC Low Pressure adapter.
Alternatively you can put the cootwo directly in front of a tank as cootwo has a built-in tank adapter.
Lastly, you can calibrate the Oxygen sensor using ambient air

If you plan to perform an O2 sensor calibration by exposing cootwo to ambient air MAKE SURE cootwo acclimates for at least 5 minutes as the gas flow within the device is reduced and a shorter period might produce incorrect results.



Click on links below for more information.

STAND-ALONE OXYGEN SENSOR CALIBRATION

SMARTPHONE ASSISTED OXYGEN CALIBRATION

BC LOW PRESSURE INFLATOR ADAPTER

BARBED HOSE ADAPTER
Last edited by eDiver on Tue Dec 29, 2015 4:08 pm, edited 8 times in total.
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Stand-alone Oxygen sensor calibration

Postby eDiver » Mon Nov 23, 2015 6:38 pm

If you have a Nitroxbuddy2 or a cootwo with firmware released on or after May 1st, 2017, please refer to the instruction provided in the Nitroxbuddy2 User Manual or the cootwo User Manual .

If you have a cootwo with firmware released before May 1st, 2017, please see below.

The stand-alone O2 calibration is limited to air and lasts 30 seconds

You can perform a stand-alone O2 calibration only if cootwo is NOT connected to a smartphone/tablet.

To perform a stand-alone O2 calibration first turn on your cootwo by pushing the activation button for about one second.
Once the display is on, hold the activation button for more than 2 seconds and cootwo will display the O2 calibration prompt for 5 seconds.
This screen consists of the words O2 and CAL alternating on the top row and the question mark on the bottom row.

Image


To start the O2 sensor calibration press the activation button again and cootwo will display the O2 calibration screen. The O2 symbol will change to the O2V symbol indicating that the display is showing the mV output of the O2 sensor and the top row will alternatively display the word O2 and the output value of the O2 sensor.
If you do not push the activation button within 5 seconds, the screen will revert to the normal operating mode.

Image


The stand-alone O2 calibration will last 30 seconds. Make sure that during this period cootwo is properly exposed to a constant flow of air.
Last edited by eDiver on Thu May 18, 2017 11:04 am, edited 3 times in total.
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Smartphone assisted Oxygen sensor calibration

Postby eDiver » Mon Nov 23, 2015 6:55 pm

See this video:

Last edited by eDiver on Thu Jan 21, 2016 8:49 am, edited 1 time in total.
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BC Low Pressure Inflator adapter

Postby eDiver » Mon Nov 23, 2015 6:55 pm

coming soon
The DiveNav Team
eDiver
 
Posts: 4888
Joined: Thu Aug 26, 2010 1:28 pm

Barbed hose adapter

Postby eDiver » Mon Nov 23, 2015 6:56 pm

coming soon
The DiveNav Team
eDiver
 
Posts: 4888
Joined: Thu Aug 26, 2010 1:28 pm


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