Kyoto DA-640, Руководство по эксплуатации

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9. Additional Information
68
Density
Mass (e.g. gram) per unit volume (e.g. cm
3
).
Specific gravity (SG) (= relative density)
SG is the ratio of mass between a substance and reference standard.
Typically, water (4
°
C unless otherwise specified) is designated as reference
for solid and liquid.
Since it is the ratio of density, the unit is dimensionless.
Density of water at 4
°
C is 0.999972g/cm
3
while SG is approx. 30ppm.
DA-6xx series uses the following expressions on display or printout:
d: Density calculation at measuring temperature.
d(t/4): SG calculation for water density at 4
°
C. (For Fahrenheit
°
F,
d(t/4)
→
d(t/60) and SG calculation for water density at 60°F.)
d(t/t): SG calculation for water density at measuring temperature.
Brix
Brix is the name of scale for solid concentration in liquid, sometimes
expressed as °Bx. The unit is ‘‘%’’ or ‘‘degree.’’
Brix is used to express sucrose concentration (sugar content) in those
industries like foods, winery, sugar and fruit farm.
Usually they use the scale for density of sucrose at 20
°
C converted to weight
percent concentration (w/w%).
Sucrose solution of weight percent 30% (100g solution contains 30g sucrose
and 70g water) is expressed as Brix 30%.
Generally Brix is known as the measure of sucrose concentration (sugar
content) but some liquids contain density of solids other than sucrose.
Therefore, Brix does not necessarily express sucrose concentration only.
While soft drinks or fruit juice contain soluble solid in a large proportion, the
Brix shows its sucrose concentration (sugar content) as is without problems.
Baling
Baling is the name of German scientist Karl Baling who developed Baling’’s
concentration for weight percent of 17.5°C sucrose solution.
Brix comes from the name of Antoine Brix (Adolf Brix) who recalculated
Baling’’s reference temperature at 15.5°C.