Operating instructions

34 METTLER TOLEDO DE40/50/51 Density Meter
Measuring parameters
Method 0 < Meas.Parameter > VA
Cell Test :Off On
Calib. :<Other STD>
STD-1 Density :[ 0.99821]
STD-2 Density :[ 1.49320]
Exit :[Execute]
If you have selected "Set" you have to enter the Rinse-2 time (0 to 9999 s). We recommend
to use a volatile solvent as Rinse-2 solution (e.g. acetone). This will allow to speed up the
purging of the measuring cell.
Select the input mode of the Purge time:
Set: Manual input, time is set by
the operator.
Off: No Purging.
Auto: Purge will stop automatically
when the cell is dry, i.e. when
the oscillation value doesn't
change anymore.
If you have selected "Set" you have to enter the Purge time (0 to 9999 s).
If "Set" or "Auto" has been selected for the purge action you can set a "Cell Test" to be
performed after the end of the drying action (purge).
Select Cell Test: "On" to perform an
automatic cell test at the end of the
purge sequence.
Enter the reliability value.
The "Cell Test" measures the density of the empty cell (air) and compares it to the theoretical
density of air at this temperature (value is stored in the instrument). A reliability value can be
entered, which stands for the maximum tolerated difference between the measured and
theoretical density of air. Its default value is 10.
A reliability of 10 means: - DE40: ±10 * 10
-4
g/cm
3
- DE50 and DE51
:
±10 * 10
-5
g/cm
3
8.6 Adjustment mode (Calibration selection)
This option is used whenever you want to select special standards for adjustment. The
standard adjustment mode is with air & water.
Select Calib.:<Other STD> to
perform the adjustment with your
own density standards.
Enter the values of these two
density standards.
Method 0 < Meas.Parameter > VA
Rinse-1 :Off Set
Rinse-1 Time :[ 10]s
Rinse 2 :Off Set
Rinse-2 Time :[ 10]s
Purge: :Off Set Auto
Method 0 < Meas.Parameter > VA
Cell Test :Off On
Reliability :[10]
Calib. :<Air & Water>
Exit :[Execute]