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Ambient temperature affecting grind weight/dry volume?
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Markarian
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Markarian
Joined: 27 Jun 2012
Posts: 656
Location: Seattle Area
Expertise: I love coffee

Espresso: ECM Technika IV Profi WT-WC
Grinder: Baratza Forte AP, HG One
Vac Pot: Bunn Trifecta MB
Drip: Moka, Aeropress, Hario V60
Roaster: Behmor 1600
Posted Tue Oct 23, 2012, 12:10am
Subject: Ambient temperature affecting grind weight/dry volume?
 

So it's getting cold up here in the PNW. Tonight's especially cold. I decided to make a decaf latte to relax with. Sure the beans were stale, but I figured I'd use them up before they got to be undrinkable. So I put them in my grinder, which never leaves 19.5g and I could swear it came out less than usual. I thought it might just be the beans, so I put some of my favorite Tanzanian Peaberry in because my roommate was wanting to pull an all-nighter. Same thing happened. It almost seemed like there was 10-15% less coffee than usual in the bin. I made sure the bin was empty and tared each time I ground, as I always do. Am I imagining things?
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NobbyR
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NobbyR
Joined: 10 Jul 2011
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Location: Germany
Expertise: I love coffee

Espresso: Poccino Opus One, Ariete
Grinder: Eureka Mignon Istantaneo
Vac Pot: N/A
Drip: Melitta Linea Unica de Luxe
Roaster: N/A
Posted Tue Oct 23, 2012, 12:55am
Subject: Re: Ambient temperature affecting grind weight/dry volume?
 

Maybe the answer is humidity. The colder the air gets, the less water it contains. The air in a heated room is also pretty dry.

 
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Markarian
Senior Member
Markarian
Joined: 27 Jun 2012
Posts: 656
Location: Seattle Area
Expertise: I love coffee

Espresso: ECM Technika IV Profi WT-WC
Grinder: Baratza Forte AP, HG One
Vac Pot: Bunn Trifecta MB
Drip: Moka, Aeropress, Hario V60
Roaster: Behmor 1600
Posted Tue Oct 23, 2012, 3:35am
Subject: Re: Ambient temperature affecting grind weight/dry volume?
 

Hmm, definitely a good point. Should I up my dose weight accordingly? Say to an even 21g? That seems a big much for a double basket, though 19.5 has been perfect for a while.
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Coffeenoobie
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Coffeenoobie
Joined: 11 Dec 2011
Posts: 3,023
Location: PNW
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Espresso: N S Oscar
Grinder: K30 & Vario W
Posted Tue Oct 23, 2012, 10:47am
Subject: Re: Ambient temperature affecting grind weight/dry volume?
 

Yes humidity affects the beans, my moving up the fine scale 2 bumps every day has swung wildly since the rains started here just this last week.  But check your weight on another scale to rule out an issue with your grinder.

 
Coffeenoobie

Buying advice: GRINDER GRINDER GRINDER. Don't cheap out on the grinder.

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