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westthebest

Registered: 09/17/11
Posts: 312
Last seen: 2 years, 2 months
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meat thermometer calibration....
#19207361 - 11/30/13 04:29 AM (10 years, 2 months ago) |
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so I have spawned two monotubs now using proper pasteurization with a cheap meat thermometer from walmart, yet checking the calibration I have noticed that calibrating it with freezing water sets it far below 212f when placed in boiling water. should I calibrate to the boiling water or the ice water? or just buy a better thermometer maybe? thanks guys. tubs look okay so far but I'd like to get it figured out for my third
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jamvan
Stranger
Registered: 03/17/12
Posts: 97
Last seen: 6 hours, 38 minutes
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Re: meat thermometer calibration.... [Re: westthebest]
#19207401 - 11/30/13 05:12 AM (10 years, 2 months ago) |
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The elevation comes to mind when considering the properties of water. How is it where you are?
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westthebest

Registered: 09/17/11
Posts: 312
Last seen: 2 years, 2 months
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Re: meat thermometer calibration.... [Re: jamvan]
#19207413 - 11/30/13 05:24 AM (10 years, 2 months ago) |
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Quote:
jamvan said: The elevation comes to mind when considering the properties of water. How is it where you are?
ah, very good point. quite high. around 9,000ft, a bit over, according to my drunken research... when calibrated correctly with the ice water test, it registers boiling water at about 180-190f
edit: and calibrating to boiling water at 212f gets me a supposed temperature of just below 60f in ice water. although I haven't looked into this much before, it would appear that the boiling temp of water should be 190-195 at my elevation. calibrating to ice water will put the boiling temp a little bit below that, but considering the elevation like you mentioned I'm thinking I should adjust it to the ice water?
Edited by westthebest (11/30/13 05:41 AM)
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krypto2000
Unknown


Registered: 12/05/06
Posts: 11,579
Last seen: 4 years, 3 months
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Re: meat thermometer calibration.... [Re: westthebest]
#19207654 - 11/30/13 08:05 AM (10 years, 2 months ago) |
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You can do it to either so long as you know what the temp is supposed to be, but it sounds like it was right when you did it with the freezing water. Didn't you say it'd register boiling as 190f? That falls within your stated range.
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bodhisatta 
Smurf real estate agent



Registered: 04/30/13
Posts: 61,889
Loc: Milky way
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Re: meat thermometer calibration.... [Re: krypto2000]
#19207864 - 11/30/13 09:12 AM (10 years, 2 months ago) |
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water boils at 195F @ 9000FT elevation. The calibration should be set in both the boiling water and ice water and should match for both of them. If not toss it and buy a good thermometer. If it's reading 190 or so that's boiling at ~11,000 FT. Check your elevation and look up a boiling water vs elevation chart on google and make sure your thermometer matches the boiling temp at your elevation.
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krypto2000
Unknown


Registered: 12/05/06
Posts: 11,579
Last seen: 4 years, 3 months
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Re: meat thermometer calibration.... [Re: bodhisatta]
#19208081 - 11/30/13 10:32 AM (10 years, 2 months ago) |
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5 degrees is accurate enough to pasturize something though, you have a 20 degree pasturization window as it is.
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westthebest

Registered: 09/17/11
Posts: 312
Last seen: 2 years, 2 months
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Re: meat thermometer calibration.... [Re: krypto2000]
#19209392 - 11/30/13 05:36 PM (10 years, 1 month ago) |
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Quote:
krypto2000 said: 5 degrees is accurate enough to pasturize something though, you have a 20 degree pasturization window as it is.
that's what I was thinking... definitely a shit thermometer, even with boiling at 190-195 the two tests don't exactly match up. set it to a middle ground that minimized how far off it was of both, I would imagine that would work alright but I should probably just spend the money on something better
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