16
(10) Measurement of Plato degree
Measurement of Plato degree at 20
°
C from density obtained at measurement temperature
(11) Measurement of Proof degree
ok
Measurement of Proof degree at 60
°
F from density obtained at measurement temperature
Proof degree is one of the units for alcohol content, and there is US Proof and British Proof. Each of
them is different in conversion degree.
Proof (US)
: Measure in US Proof unit (100v/v%=200 US Proof)
Proof (IP)
: Measure in UK Proof unit (100v/v%=175 British Proof)
(12) Concentration measurement by setting desired concentration conversion formula
Set “Comp. Temp” and “
α
” in the previous (2), measurement of density with temperature
compensated or in the previous (4), measurement of specific gravity with temperature compensated.
Then, concentration can be calculated using the calculated “Comp D” or “SG”.
User defined concentration conversion formula (Linear expression: y = a + bx)
Conc.(%) Den.(g/cm
3
) at 20
°
C Conc.(%) Den.(g/cm
3
) at 20
°
C
10.0 0.9820 10.6 0.9842
10.1 0.9824 10.7 0.9845
10.2 0.9827 10.8 0.9849
10.3 0.9831 10.9 0.9852
10.4 0.9835 11.0 0.9855
10.5 0.9838
For example from the above data, a conversion formula can be obtained as follows.
Suppose take y for concentration and x for density, you can obtain y=283.2x–268.1 by the
approximate formula from regression line using commercially available spread sheet software.
Therefore, you input –2.681E+2 for coefficient ‘a’ and 2.832E+2 for coefficient ‘b’.
Example of input:
Example of measurement:
(when density is 0.9820 g/cm
3
)
