Table 1 provides a method of correcting hydrometer indications at temperatures between 0 and 100 degrees Fahrenheit to true proof. If distilled spirits contain dissolved solids, temperature correction of the hydrometer reading by the use of this table would result in apparent proof rather than true proof. Most hydrometers are calibrated to 20°C, but some are calibrated to 15°C - any good hydrometer will have the calibration temperature marked. This calculator, when working with a hydrometer calibrated to 20°C, is accurate over the approximate range 0-60°C, and when calibrated to 15°C, approximately 0-55°C. This expression is based on °F HYDROMETER ANALYSIS 1. Sample 4. Hydrometer No. 151 H 8. Temperature correction (Ct) 2. Specific gravity of the soil 5. Dispersing agent 9. Area of the jar 3. Weight of oven dried soil in 6. Correction for dispersing [See Table II] K See Table III L/T √L/T Particle size D=K√L/T (in mm) Percent Finer To use chart, choose s pecific gravity reading and temperature c'osest to the unknown sample and apply correction by moving the decimal point (3) places to the left. For example the For example the To estimate the actual % abv without a temperature correction table you just need to remember one general rule. For every 1 °C over 20°C subtract off 0.33% from your hydrometer reading. Let's test this method of estimation with our previous example. Actual Temperature of spirit is 30°C. Observed Hydrometer reading s 93%. To use chart, choos e specific gravity reading and t emperature c 'osest to the unknown sample and apply correction by moving the decimal point (3) places to the left. For example the. correction factor s pecific gravity 1,000 at 77F (25C) would be +0018. For corr ections not on chart, one must interpolate between given corrections. hydrometer when the particle density is 2.65 g/cm3 and fluid density is 1.00 g/ cm3 (see Table 1 for water density and viscosity at different temperatures). These conditions, however, are rarely met and corrections must be made for deviation from the standard conditions. The correction factors are available in the tables attached Correction (SG) = 0.2×Temperature - 4 (Temperature in degrees Celcius) Correction (Brix) = 0.03×Temperature - 1.8 (Temperature in degrees Fahrenheit) Last edited by Hownowbrowncow on Sat Jun 02, 2012 4:22 am, edited 2 times in total. View our Hydrometers products at Fisher Scientific. Please sign in to view account pricing and product availability. Sign In 2 Hydrometer Temperature Correction Chart Template free download. Download free printable Hydrometer Temperature Correction Chart Template samples in PDF, Word and Excel formats File Type: pdf . Size: 28.32 KB . Pages: 1 Page(s) The True Percents of Proof Spirit for Any Indication of the Hydrometer. File Type: pdf . Size: 1.45 MB . Based on Eq. (5.4), the variation of L with hydrometer reading is shown in Table 5-1. For actual calculation purposes we al~o need to know the values of A given by Equation (5.3). An example of this calculation is shown below. The temperature correction (F T) may be approximated as FT = -4.85 + 0.25T(for Tbetween 15°C and 28°C) Obtain the effective hydrometer depth (L in cm) for the corrected meniscus reading from Table 4-1. Obtain the value of K from Table 4-2 if the G s of the soil is known. If it is not known, assume that it is 2.65 for this purpose. Calculate the equiv