Operating instructions
38 METTLER TOLEDO DE40/50/51 Density Meter
Select "Coefficient" with the → key.
Confirm with <ENTER>.
Select "x <- d" with the → key.
Confirm with <ENTER>. See also
paragraph "Constants used" on
page 41.
Enter the A, B and C values
Confirm with <ENTER>.
Now the DE40 (DE50 or DE51) has been programmed to measure APPARENT EXTRACT
in beer. Load the measuring cell with degased beer (any air bubbles would lead to wrong
results). After pressing <MEASURE>, the following values will be displayed:
During the measurement the
temperature and the concentration
are displayed.
At the end of the measurement the
final result will be displayed
(APPARENT EXTRACT
concentration).
Note: you can select the number of
decimal places under "Calc.
Para.-Decimals".
Note: This concentration function can also be used to convert the density into other units,
e.g. into API degree. The function used to convert density into API degree is:
API degree = [(1/d
20
20
) - 1] x 141.5 + 10
Case 2: Input of concentration table (concentration function unknown)
We will describe this function using an example: measurement of sulfuric acid concentration
(aqueous solution). You will have to enter a concentration table (data pairs of density and
corresponding concentration), the DE40 (DE50, DE51) will determine automatically the
correct coefficients for the concentration function.
Calculation parameters
Method 0 < Result >
Result : <Conc. >
Conc.Unit : <% >
Conc.Formula : <A+Bx+Cx
2
>
Parameter Set : Table Coefficient
Data Replace : <x<-d >
Method 0 < Result >
A :[ -460.234]x10[ 0]
B :[ 662.649]x10[ 0]
C :[ -202.414]x10[ 0]
Exit :[Execute]
0.Method-0 01-01
Temp.(°C) Conc.(%)
Set 20.00
Cell 20.00
Measuring
1.8804
0.Method-0 01-01
Temp.(°C) Conc.(%)
Set 20.00
Cell 20.00
1.88
Result