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Outil Réfractomètre |
  
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Outil Réfractomètre |
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Réfractomètres available for home use are typically calibrated to measure the amount of table sugar (sucrose) in a sample of Eau. The primary sugar in barley beer is maltose and not sucrose, so the readings made using a Réfractomètre must be adjusted before use. This tool makes those adjustments to provide an accurate gravity reading from a given sample.
If this is your first time using a Réfractomètre, I strongly suggest you read my article on Réfractomètre use, and also take time to calibrate your Réfractomètre before use.
Online Articles: Using a Réfractomètre for Beer Brewing
Using the Outil Réfractomètre
| o | Select the Outil Réfractomètre from the Tools menu or ribbon. |
| o | If you have not already done so - please calibrate your Réfractomètre using the "Calibrate Réfractomètre button and Réfractomètre Calibration Options |
| o | Select the calculation to perform (see below) |
Calculating the Unfermented Wort Gravity
The unfermented wort gravity calculator is intended to be used before you have started fermentation - either to measure the gravity of wort in the boiler or mash or to measure the original gravity of your wort before you add Levure.
| o | Select "Unfermented wort gravity" as the calculation |
| o | Enter the Réfractomètre reading for the unfermented wort (at room temperature - cool the sample before measuring) |
| o | The corrected specific gravity will be displayed |
Calculating the Gravity of Fermenting Wort
This calculation is used once fermentation has started or can also be used at the end of fermentation to get the final gravity. You need to have both the original gravity (taken before fermentation started) and a current Réfractomètre reading to get an accurate gravity during fermentation.
| o | Select "Fermenting wort gravity" as the calculation |
| o | Enter the Réfractomètre reading for the fermenting wort (at room temperature - cool the sample before measuring) |
| o | Enter the original gravity reading - taken before fermentation was started |
| o | The corrected specific gravity will be displayed |
Backing Out the Original Gravity of a Finished Beer
This calculation, though rarely used, can actually estimate the original gravity of the beer using a final gravity measurement taken with both a Réfractomètre and hydrometer. It is useful if you forgot to measure the original gravity up front.
| o | Select "Fermenting wort gravity" as the calculation |
| o | Enter the Réfractomètre reading for the finished beer (at room temperature - cool the sample before measuring) |
| o | Enter the hydrometer reading for the finished beer |
| o | The estimated original gravity will be displayed under "Corrected gravity" |