How often do you have to re-calibrate your refractometer? - Home Brew Forums

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Old 05-03-2012, 12:46 AM   #1
kh54s10's Avatar
Aug 2011
Tiverton, Rhode Island
Posts: 11,083
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On my last brew day I checked and re-calibrated my refractometer before starting the mash. (I adjust it before every brew) I then thought my OG was low at 1.046 instead of the predicted 1.053 so I checked and it was off again. I re-calibrated and took another sample and got 1.052. Quite a difference.

Is it normal to have to re-calibrate this often?

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Old 05-03-2012, 12:54 AM   #2
Jul 2010
Pflugerville, Texas
Posts: 346
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I'm in a warmer climate so I tend to recalibrate with distilled water before every reading. Only takes a few seconds and gives me confidence in the reading.
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Old 05-03-2012, 12:26 PM   #3
Calichusetts's Avatar
Nov 2011
Plymouth, MA
Posts: 3,011
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I do it every two weeks or so, depending on how much I brew. Suprisingly, I've never really had to make any adjustments which is nice, maybe a tiny turn or so

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Old 05-05-2012, 02:05 AM   #4
May 2012
Rockland, Maine
Posts: 37
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Often it will vary by the amount you have mentioned between readings just based on temperature. You can often take readings from the same pipette 5 minutes apart and get the kind of variance mentioned above.
but distilled water at room temp should be done periodically to calibrate.

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Old 05-05-2012, 02:15 PM   #5
Jan 2008
Salem, OR
Posts: 120
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Due to changing temps throughout the day in the garage, I calibrate before nearly every reading. As mentioned previously, it only takes a few seconds.

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