Barista Magazine

OCT-NOV 2017

Serving People Serving Coffee Since 2005

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Page 102 of 115

could be something like 18 grams in, 36 grams out, so a 1:2 ratio. I always recommend connecting with your roaster or coffee trainer to make sure you have the correct recipe. I have no doubt that the best roasters put in a lot of time devel- oping a recipe that highlights their coffees' best attributes. —Double J What's the best way a small, independent coffee shop could check their coffee machine's pressure stability if they can't afford a pres- sure meter? What's the next best way to fi gure it out? Virtually every commercial espres- so machine has a pressure gauge somewhere, but you need to be able to tell if it is reading accurately. One tool many technicians have in their kit is a portafi lter manometer. Manometer is basically a fancy word for pressure gauge. These tools are extremely handy, and range from super basic (literally just a pres- sure gauge attached to a portafi lter spout or handle), to super precise temperature- and pressure-reading combination tools. The one most people have heard of is the "Scace II thermofi lter," which is casually ref- erenced in our coffee world as simply the Scace, named for its designer, Gregory Scace. Greg is an engineer with a love for coffee who has been hugely infl uential with the develop- ment of systems to bring espresso machine temperature stability in line with other industry process controls (for example with PID controllers), among other things. If you've never heard of him, you should defi nitely look him up. We all owe a pretty big debt to his contributions to coffee. The Scace II is a fairly spendy tool for the average coffee shop owner and the procedure for using it is complicated and lengthy if you follow the proper procedures laid out by Greg, so it's probably best to leave the investment and application of one to experienced technicians. If all you need is to check your pressure at the group and compare it to what your machine's gauge reads, you can get a super basic portafi lter pres- sure gauge that screws onto a standard portafi lter if it has a threaded spout, for $50 or less. Or you can get the next step up with a fully integrated handle/gauge for around $100 from a few places. You would need to be sure you get the right one for your machine, and know how to properly interpret your results, but that's a whole other conversation. —Alex SELECTED ESTATE COFFEES. Contact us for samples and offers. Your partner for superior green coffees and outstanding services since 1922. 103

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