Finished beer to monitor O2 pickup and potential for future oxidation. But yes.
Purge verification process and thresholds I use (and way I measured the tank) are pretty standard in the industry. And like I said, mixed stories from Anton Paar. Especially since zeroing out the O2 (calibration) value is done with super high purity nitrogen gas and not liquid (though daily verifications done pushing distilled water with less high grade nitrogen). I've never done it myself but I know we have to use a higher purity than the standard nitro tanks we have. But seems odd it could be calibrated with gas phase but not measured with it. I'm not an engineer, so what do I know.
Perhaps what I should take away is that the numbers it spits out for gas values are useful and repeatable ones, but not face value ones. Similar to fermentation refractometer readings being useful for telling if fermentation is over but can't be taken at face value for gravity. That seems reasonable enough.
Where I'm confused now is the discrepancy between my bulk supply and bottle supply then. To my knowledge they are same grade and definitely same supplier. Does that discrepancy both in measured value and behavior with dissolved oxygen levels in the beer tell me that there is indeed a purity difference? Or is something else going on? Process stays the same, just a little smaller scale.
Purge verification process and thresholds I use (and way I measured the tank) are pretty standard in the industry. And like I said, mixed stories from Anton Paar. Especially since zeroing out the O2 (calibration) value is done with super high purity nitrogen gas and not liquid (though daily verifications done pushing distilled water with less high grade nitrogen). I've never done it myself but I know we have to use a higher purity than the standard nitro tanks we have. But seems odd it could be calibrated with gas phase but not measured with it. I'm not an engineer, so what do I know.
Perhaps what I should take away is that the numbers it spits out for gas values are useful and repeatable ones, but not face value ones. Similar to fermentation refractometer readings being useful for telling if fermentation is over but can't be taken at face value for gravity. That seems reasonable enough.
Where I'm confused now is the discrepancy between my bulk supply and bottle supply then. To my knowledge they are same grade and definitely same supplier. Does that discrepancy both in measured value and behavior with dissolved oxygen levels in the beer tell me that there is indeed a purity difference? Or is something else going on? Process stays the same, just a little smaller scale.