Operating instructions

76 METTLER TOLEDO DE40/50/51 Density Meter
14.2.2 Temperature measured in °C, with a reference temperature at 20 °C:
This option is activated by selecting the temperature unit °C (see Section 11.6). The stored
values are based on table IVa of OIML Guideline No. 22 (OIML: Organisation Internationale
de Métrologie Légale). You must perform your measurements at 20 °C to obtain the correct
ethanol content.
Under the parameters of the concentration calculation, select "Alcohol [%]" instead of a
calculation function (see also Section 9.2). The density and the alcohol concentration are
printed out as the result, e.g.:
Accuracy Reproducibility
DE40: Alcoh 42.1 % ± 0.1 % ± 0.1 %
DE50/51: Alcoh 42.09 % ± 0.01 % ± 0.01 %
Note: The alcohol values of measurements with, e.g. whisky, are relative values: They do
not specify the actual concentration as the density also depends on all other
dissolved substances of this beverage.
14.3 BRIX software
With the BRIX software the measured density of a sucrose/water solution can be converted
to the weight percent sucrose content (°BRIX). The stored tabulated values are based on
table 109 of NBS Circular 440 (NBS: National Bureau of Standards, since 1988: National
Institute of Standards and Technology). The measurement temperature for the automatic
conversion is 20 °C.
Under the parameters of the concentration calculation, select "BRIX [%]" instead of a
calculation function (see also Section 9.2). The density and the BRIX degrees are printed out
as the result, e.g.:
Accuracy Reproducibility (within 0 - 40 %)
DE40: BRIX 10.23 % ± 0.03 % ± 0.03 %
DE50/51: BRIX 10.234 % ± 0.003 % ± 0.003 %
Note: The BRIX values with, e.g. milk are relative values: They do not specify the actual
sucrose concentration as the density also depends on all other dissolved
substances of this beverage.
14.4 Viscosity correction
When measuring samples with higher viscosities (over 10 mPs), the oscillation tube
technique shows a slightly higher value than the real density of the samples. This application
corrects the systematic viscosity error when measuring samples with higher viscosities. See
section 6.2. for more information.
Special application cards