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	FORUM ON BEER, HOMEBREWING, AND RELATED ISSUES
		Digest Janitor: pbabcock at hbd.org


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Contents:
  RE: bubble logger ("Brian Lundeen")


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Date: Thu, 18 Jun 2009 07:08:40 -0500
From: "Brian Lundeen" <blundeen at mts.net>
Subject: RE: bubble logger

> Date: Wed, 17 Jun 2009 14:46:31 +1000
> From: "Williams, Rowan" <Rowan.Williams at ag.gov.au>
> Subject: Bubble Logger [SEC=UNCLASSIFIED]
> 
> My dear Bwian,
> Would elevation impact on the formation and frequency of 
> bubbles?  
> 
> But how do we cater for those of us in the first world who 
> brew in metric and make 23 litre batches???
> 

Dearest Rowan,

Thank you for your contribution to this important topic. In regards to your
first question, did you not read the manual that came with your airlock
calibration kit? On page 42, Section 7.1.5 "Compensation for Elevation"
clearly points out that airlocks must be calibrated to a standard elevation
of 802 feet (sorry, 244.5 meters) above sea level. This of course is the
mean elevation of Ann Arbor, Michigan, center of the homebrewing universe.
Elevation compensation is done by precise adjustment to the liquid volume in
the airlock and must be checked and corrected daily. The optional
micropipette kit (if your vendor doesn't carry it, it can be ordered
directly through BLOW) contains a number of useful sizes from 1 through 50
micro-liters, and greatly simplifies this task.

As to your last point, being a Canadian I sympathize with your plight, but
brewers the world over know that a standard batch size is 5 US gallons and
we just have to deal with that. In any case, one could argue that REAL
metric brewers only make batches of 100 liters size, or multiples thereof.
;-)

Cheers
Bwian



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