Question O2 sensor calibration

[lermontov]

Don't you need to know what MV the cells calibrate to in O2 to do this? Say you have 3 cells and they read 42 mv, 50 mv and 57 mv to start with (at surface) duing o2 calibration.

How do you remember on the dive what the cells started at and which cells had the assigned value? How do you know during the dive that the cells don't drift with temperature change. How can a combination of cell drift and poor memory, make an real sense of the during a dive?

My mental maths level approximates that of a 3 year old, whilst diving at any depth below 6m.

im assuming you check your MV reading at calibration so youll know what RANGE you have and if that range is acceptable. Your mv reading as above are only an example Im assuming as 42mv to 57mv is large difference, so with a top end PO2 of 1.6m, even 10% variation is significant

Im not sure how much of an impact temperature will make but were taking about checking the cells to find anomalies

If you want to check linearity using your mv readings then you can do it with a depth that doesnt necessarily demand your reach po2 of 1.6 so Im not using any math under water - just checking on where the linearity if any starts to flatten off


Ive put in a couple of links for you to look at they will add further info

J

Thread 'Cell linearity checks'

Dec 4, 2019

I have recently been reviewing my knowledge of cells and have read several useful threads on here. This prompted me to resurrect a thread on a UK board that I started some time ago.

I am now a bit concerned that my understanding of the concept is flawed and would appreciate a sense check.

It's probably easiest to understand by reading the following thread if you have time:

Current Limiting and Linearity - Page 8

• JonG1
• Replies: 16
• Forum: Rebreather Diving