Just got my refractometer in the mail. Just wanted to get the proceedure down so i get proper measurements and properly care for it.
I don't think it should matter whether it's sugar or salt a refractometer measures the specific gravity which is merely a measurment of relative density, whether its dissolved salt or sugar in water, a solution with a SG of 1.020 is the same from SG purposes.
Calibrate to 0.0 brix/plato with distilled or RO water that is roughly the same temperature as the wort sample. That's the ATC part of it...the calibration solution needs to be the same temp as the 'live sample' since large differences will skew the sample reading.
I use a refractometer for my reef tank, but we are measuring sugars in the wort here and not salt. How does this affect the reading?
Set it on stun and watch the perimeter for romulans.
That was my interpretation of what I read about ATC being you needed to calibrate it at the temp its going to be used at. You are right that you don't really have to 'actively' cool the wort since 3 drops just doesn't carry enough thermal mass. The plastic dropper probably sinks 90% of the heat from the 1ml I draw in to dropper onto the prism.
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