Author Topic: Mash Temperature consistantly 4 to 5 degrees low  (Read 538 times)

Offline rjfvt

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Mash Temperature consistantly 4 to 5 degrees low
« on: June 29, 2019, 06:52:18 AM »
hello, I have entered the proper equipment weight and volume for my mash tun. I've entered the actual temperature of the grain and mash tum into Beersmith 3. my mash temperature has been consistently low by 4 to 5 degrees. this is frustrating because it changes the type beer I'm trying to make. how can I fix this.


Thank you,
Rick

Offline dtapke

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Re: Mash Temperature consistantly 4 to 5 degrees low
« Reply #1 on: June 29, 2019, 07:07:10 AM »
Can you provide a recipe with your brewing equipment profile?

What are you using to check the temperature of the water, grain, and equipment? is it calibrated?

you say "consistently 4-5 degrees low", Fahrenheit? Celsius? how are you mixing your mash and checking the temperature? how many batches have been 4-5 degrees low?
« Last Edit: June 29, 2019, 07:10:28 AM by dtapke »
32g eHERMS
Drinking: Dopplebock, NEIPA, Pils
Primary: empty
Secondary/Lagering:
Next Brew: RIS

Offline rjfvt

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Re: Mash Temperature consistantly 4 to 5 degrees low
« Reply #2 on: June 29, 2019, 07:36:26 AM »
I enter the temp of the grain and mash tun just prior to brewing so I have an accurate temp for the software to do its calculating. I also use a digital Fluke Meter with a heat probe.
 
Mash Tun: 15 gallon plastic cooler mash with a copper pipe drain. 15 Gallon, 15LBS, Mash Tun Specific Heat 0.30 Cal gram degree C

Maple Imperial Stout rev.C   (5.5 Gal Batch)                        
10%   ABV                  
56.9   SRM                  
71.4   IBU                  
19.75 Lbs.   Various grains                  
1.7 oz   Warrior Hops                  
1.081 OG   "OG" Pre Boil Original Gravity after Mash                  
1.072 SG   "SG" Starting Gravity post boil                  
1.022 FG   "FG" Final Gravity after fermentation is complete                  
6.36 Gal   Mash in volume                  
160.5? F   Mash starting temperature to compensate for equipment and grain temperatures  160?F                  
19.75 Lbs.   Grain                  
150? F   Mash Temperature  144.2? F               
XX Grams   AddWater additions                  
10 Min   At Ten minutes into the mash check PH 5.4(The Required PH is 5.4)                  
75 Min   Mash steep time                  
50 Min   Mash drain                  
3.48 Gal   Batch sparge Volume                  
XX Grams   Add Water additions                  
170? F   Batch Sparge temperature 170?F                  
30 Min   Batch Sparge steep time                  
30 Min   Batch Sparge drain                  
6.47 Gal   Pre Boil volume, add water if needed  (Pre boil actual amount 8.5 Gallons                  
1.081 OG   Pre boil SG reading at 70? F  1.081OG                  
90 Min   Boil time                  
90 Min   Add 1.70 oz Warrior Hops                  
10 Min   2 Tablets Whirlfloc                  
10 Min   Add 1lb Non-Fermentable Lactose Sugar                  
10 Min   Add 2.5 tbsp Yeast Nutrient                  
Flame Out   Add 12 oz's Grade B Maple Syrup                  
1.072 SG   Post boil SG reading at 70? F   1.099 SG                  
5.50 Gal   Post Boil Volume needed (Post boil actual amount 6.4 Gallons                  
2 pks   Wyeast Labs #1332 Yeast. One package per carboy                  
                     
Water additions      Mash      Batch Sparge         
Gypsum      2.5 Grams      1.4 Grams         
Chalk      3.2 Grams      0 Grams         
Calcium Chloride      1.9 Grams      1.0 Grams         
Lactic Acid      2.6      0 ML         
                     
Water Target Profile:      Ca: 100   Mg: 5   Na: 35   Cl: 60   SO4: 50   HCO3: 260
RO Water End Profile:      Ca: 99   Mg: 0   Na: 29   Cl: 59   SO4: 68.3   HCO3: 185.2
« Last Edit: June 29, 2019, 07:38:59 AM by rjfvt »

Offline Oginme

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Re: Mash Temperature consistantly 4 to 5 degrees low
« Reply #3 on: June 29, 2019, 09:08:00 AM »
The easiest way to fix this is to first make sure your thermometer is calibrated using an ice bath and boiling water.  Next, I would recommend making a copy of your brewed recipe in BeerSmith.   

Now go to the mash profile in the recipe, edit and change the  target mash temperature to match your actual measurement.

Go to the design tab and adjust the specific gravity of your equipment.  You can access this in the recipe by clicking on the check mark button next to the equipment profile on the design tab. 

Make an adjustment until the recommended strike temperature matches you actual strike temperature.

Once you have this set, save the equipment profile by clicking on the disk icon next to the equipment profile.   You will need to update all your recipes with this new profile so I recommend giving it a new name to make it differentiated from your old profile.
Recycle your grains, feed them to a goat!

Offline dtapke

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Re: Mash Temperature consistantly 4 to 5 degrees low
« Reply #4 on: June 29, 2019, 10:02:30 AM »
16 degrees of temp loss seems a bit excessive to me, i generally see around 10F on my system which I'm sure is different than yours.

make sure you're mixing and measuring in your initial water accurately, and mixing your grain and water thoroughly as well. If you're just checking the water temp at the top of water that's being heated it will be different than the average temperature of the water.

as a side note, 150 v 145 will only result in a slight (1-1.5%) change in attenuation. So it shouldn't change the profile of the beer drastically.

Oginme's "work around" will work, as long as the issue isn't in your process or inaccurate measurements.

I was hoping you'd post a .bsmx file as that provides all of the data of your setup as well.
32g eHERMS
Drinking: Dopplebock, NEIPA, Pils
Primary: empty
Secondary/Lagering:
Next Brew: RIS

 

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