Author Topic: FG goes up?  (Read 517 times)

Offline Pope of Dope

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FG goes up?
« on: January 13, 2018, 09:15:52 PM »
took a gravity reading before cold crashing, 1.022, then after cold crash during kegging 1.024.  What?
Generally you don't see that kind of behavior in a major appliance.

Offline denny

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Re: FG goes up?
« Reply #1 on: January 13, 2018, 09:23:43 PM »
took a gravity reading before cold crashing, 1.022, then after cold crash during kegging 1.024.  What?

Misreading.  Different wort temp.  Could be a number of things.  Close enough to not sweat it.
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Offline Pope of Dope

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Re: FG goes up?
« Reply #2 on: January 13, 2018, 10:05:37 PM »
It was a different temp.  The second reading was way colder, like 40f versus 70f.  How does the temp affect a hydrometer reading?  Didn't know that.
Generally you don't see that kind of behavior in a major appliance.

Offline Bob357

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Re: FG goes up?
« Reply #3 on: January 13, 2018, 10:40:35 PM »
Density changes with temperature. You probably got a sheet with your hydrometer that had information including a temperature correction table.
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Offline Robert

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Re: FG goes up?
« Reply #4 on: January 13, 2018, 10:52:34 PM »
Search "hydrometer temperature correction," you'll find calculators.  Just have to know if yours is calibrated for 59°F or 68°F (most inexpensive homebrew ones are 59.)
EDIT stupid typo
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Offline Pope of Dope

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Re: FG goes up?
« Reply #5 on: January 13, 2018, 11:05:05 PM »
Got it. Thanks everyone.  That makes more sense. Been doing it wrong this whole time.  That's what she says. 
Generally you don't see that kind of behavior in a major appliance.