Is a meg some how different to my unit ?

I calibrate my unit (Hammer Head Inspo, VR3, Shearwater or KISS) and leave it calibrated till it reads wrong.

That could take weeks, even months.


On assembly i check the hand sets in air and expect 0.19-0.25 and then I flush the unit three times with 02 and i expect to see 0.97-100%


If I do, I go diving. If i find then at the limits or just outside my personal tolerance for error, I recalibrate the unit.


If I find one cell is significantly out or all three cells are showing significantly high or low I will first check the unit for an issue rather than recalibrate.


Ill re-check the gas against a known source (Usually my Js of premix or 02) and then Ill look for dodgy connections on the cells or Fischer cables/connections.
Ill swap the cells about to see if the error followed the cell and only when totally satisfied its not one of these issues will I recalibrate.


I never liked the Inspo thing about "calibrate first and ask questions later". It seemed to me the unit is telling you there is a problem but we just recalibrate the cells to work around the issue.

ATB

Mark Chase