Mettler Toledo Densito 30PX Instrucciones De Manejo página 14

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API (American Petroleum Institute)
The measured values are converted to a reference temperature of 15 °C or 60 °F.
This conversion is based on API tables: product group A: crude oil; product
group B: fuel, petroleum products; product group D: lubricants. The result can be
expressed as density (e.g. API A (Density)), or directly in API degrees (e.g.
API A (degrees)).
Brix (Sucrose)
Measurement of the sucrose concentration, percent weight at 20 °C.
Alcohol (Ethanol)
Measurement of the ethanol concentration in water, percent weight (Wt%) or
percent volume (Vol%) at 20 °C.
H2SO4 (Sulphuric acid concentration)
Measurement of the sulphuric acid concentration, percent weight at 20 °C.
Baume (°Baumé scale)
Measurement in °Baumé (heavy Baumé for d > 1, light Baumé for d < 1) calcu-
lated to a reference temperature.
10 temperature-compensation coefficients can be saved.
Input of temperature-compensation coefficients via Comp. Density.
For typical temperature-compensation coefficients, see Chapter 13.2; calcula-
tion of α, see page 11.
Plato
Measurement of the °Plato at 20 °C.
Proof
Measurement of the Proof degree at 60 °F.
The Proof degree is a unit used to determine the ethanol content.
Proof (US):
Proof (IP):
Conc. (Concentrations)
Measurement of the concentration via the input of the desired concentration-
conversion formula y = a + bx at a reference temperature.
y = concentration in % or without units
a, b = sample-dependent coefficients
x = measured density. The following units are possible for x:
• 1/compensated density – 1
• compensated density – 1
• compensated density
Calculation of the temperature-compensation coefficient α
- Measure density of the sample:
• at a temperature (T
• at a temperature (T
- Calculate α according to the formula:
density at T = density at T
2
or
α = ( density at T
density at T
- Enter value a x 1000 into the instrument.
10
Measurement with US unit (100 v/v % = 200 US Proof ).
Measurement with IP unit (100 v/v % = 175 British Proof ).
) above the normal measuring temperature,
1
) below the normal measuring temperature.
2
(1 + α
•
1
– 1 ) / ( T – T
2
1 2
1
• 1/specific gravity – 1
• specific gravity – 1
• specific gravity
( T – T ))
•
1 2
)
METTLER TOLEDO Densito 30PX