Only problem is small grain bills without the micro pipework where you still need to topup the mash from your sparge water. * No need to have seperate profiles for different brewtimes - you can adjust it on the recipe page ![]() * The first mash step should specify a Water/Grain ration of 2.7L/kg and subsequent should be 0 water to add * Your Mash step should all be "Temperature" steps * Cooling Shrinkage = 0% as you are initially measuring the water cold, it expands and contracts again * Top Kettle = 0, as mash tun addition is auto-added to boil volume oz per oz of grain) and 0.06 gallons of wort to dead space in your mash tun. From that 10.57 gallons, you are losing 2.61 gallons to the grain absorption (assuming standard 0.96 fl. This will then get BS to add the 3.41L to your initial mash step/strike water You are using 6.86 gallons for the infusion step, 3.71 gallons for the sparge. * Mash Tun Addition, not Lauter Tun Losses and tick "adjust mash vol for losses". I preheat my mash tun with 135 degree water, then let it drain out just before adding my grain. When it stops running, close the drain and pour out the remaining water into a measuring pail of some kind. One extra setting: Under Advanced Options, Grain Absorption of 0.77 fl oz/oz (This is the same as 0.8 l/kg in the grainfather calcs) So you can put a few gallons of water in the tun, then open the drain. I highlighted the key settings in the attached image I get basically identical volumes to the GF site and pretty consistent brews.Īlso wanted to add my rationale for settings. The process of measuring grain (or any substrate) absorption is simple, although grain bed depth should affect the final last runnings volume.I know there are several other threads, but thought I'd share my BS setup for my Grainfather. I don't see why mash tun differences would have any effect on grain absorption, it shouldn't. The same for other people posting values they measure, as long as they list grist sizes, method, etc. The variables you mention are why I provided the info I did, it should help other people use those data. I use the ratio for 2-row base malt I listed in the first post (1.4:1) as a sufficient mean. It makes sense to enter the value of the main grain comprising (often greater than 80%) the grain bill, or a mean of a brewer's most common grain bills, under the options setting. Ive searched these forums and used Google but cant figure out how to change the grain absorption rate. I doubt many users of BeerSmith know how to calculate values to adjust BeerSmith's default setting. absorption rate across the board as far as I can tell, which of course isn't accurate across the board. Yes, I'm aware there's no standard absorption for various grains. Valid goal values for grist size, depending upon brewing method and beer, is 50-55% coarse, 25-30% regular, 7-9% fine, and 6-8% pan (dust). Method to measure grist and gap: NIST certified sieves, mill gap adjusted just before test, 3 minutes shake with hard knock every 30 seconds, test repeated once to verify results grist collected as it fell from mill, not scooped from a pile.Mash was stirred well at first, and every so often over 60 minutes (to replicate actual mash time). Method to test absorption: Normal math used for such things, RO water at 170'F, 60 minute steep in a Styrofoam cooler with 170'F water bath surrounding the small 1 gallon kettle.Regular grist ratio: 24.2% (#30 screen).Mill roller number: 3 (The MM-3 Pro from Monster Brewing).Malt: 2-row (branded as "Brewer's Malt"). ![]() The format I think most useful is listing the maltster, malt, mill roller number, mill gap size, grist size percentages, and method. ![]() Which made me think a thread where people can post their absorption rates for various grains would be useful for everyone. It came out much higher than the default value in BeerSmith. BeerSmith default values, and today I tested the absorption ratio of our main base malt. We've been doing lots of testing verifying our data vs.
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