Author Topic: Good video showing proper way to calibrate with an ice bath  (Read 1992 times)

Offline ccfoo242

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Good video showing proper way to calibrate with an ice bath
« on: February 29, 2012, 09:05:54 AM »
Found this today and thought I would share, its from the makers of the Thermapen:

The Truth About Ice Baths: Five Secrets Revealed

Intra cervisiam est deus.

Offline mabrungard

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Re: Good video showing proper way to calibrate with an ice bath
« Reply #1 on: February 29, 2012, 10:09:59 AM »
Great info!  It also points out that a Thermopen should be accurate to 300+ degrees when calibrated in a 'proper' ice bath.  Other thermometers may not have that sort of accuracy span.  And that invites the potential for trouble even if you perform your ice bath calibration check properly. 

An important thing to note: In food service, their main concern is in the proper maintenance and storage of perishible food stuffs at near freezing temperatures.  That makes it completely appropriate to calibrate most thermometers with an ice bath.  The target temperatures that the Users are aiming for are typically only 10 or 20 degrees F away from that freezing point. 

Unfortunately in brewing usage, our target temperatures are well over 100 F away from that freezing point.  Its great to see that Thermopen acknowledges that their product will maintain measurement accuracy over the temperature span we are interested in brewing.  For any other thermometer, you would be wise to calibrate to a NIST-certified thermometer in the typical mashing temperature range to assure your working thermometer is reading correctly.  The freezing point and boiling point calibration still doesn't work for you if you don't have a Thermopen. 
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Offline ccfoo242

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Re: Good video showing proper way to calibrate with an ice bath
« Reply #2 on: February 29, 2012, 10:38:11 AM »
I came across it because the temp controller I bought allows for calibration, and I'd never done an ice bath calibration before.

I thought it was interesting how he says to leave it alone if its within the accuracy rating for a given thermometer.

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Offline denny

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Re: Good video showing proper way to calibrate with an ice bath
« Reply #3 on: February 29, 2012, 10:51:00 AM »
Unfortunately in brewing usage, our target temperatures are well over 100 F away from that freezing point.  Its great to see that Thermopen acknowledges that their product will maintain measurement accuracy over the temperature span we are interested in brewing.  For any other thermometer, you would be wise to calibrate to a NIST-certified thermometer in the typical mashing temperature range to assure your working thermometer is reading correctly.  The freezing point and boiling point calibration still doesn't work for you if you don't have a Thermopen.

So true!  For those of us not lucky enough to own a Thermapen, I wouldn't recommend using the freezing/boiling calibration method.  I've had thermometers that were off as much as 10F at mash temps, even when they were right on at the extremes.
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Offline oscarvan

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Re: Good video showing proper way to calibrate with an ice bath
« Reply #4 on: February 29, 2012, 07:34:37 PM »
Which is not a problem, as long as you know, and apply the correction.
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Offline narvin

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Re: Good video showing proper way to calibrate with an ice bath
« Reply #5 on: February 29, 2012, 07:53:33 PM »
That video made me want a Fluke 1595a super-thermometer.  Until I looked up the price...
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