Operating instructions
METTLER TOLEDO DE40/50/51 Density Meter 35
Note: The Cell Test is not available if you select "Other STD". Only very accurate density
standards should be used for adjustment with other standards, otherwise your
density meter could give wrong results.
8.7 Explanation of auto-sampling and auto-draining
You have selected "Auto" for the sampling and for the draining, for example with:
Over Sampling rate = 30%
Drain rate = 70%
If the time measured from starting the pump until the sample reaches the measuring cell
(with ASU-DE or SC24) is 10 s, then the sampling and the drain time will be:
Sampling time = 10 + (10 x 0.30) = 13 s
Drain time = 13 x 0.70 = 0.91 s
When using this oversampling rate (O.S.Rate) make sure that the measurement cell as well
as the ingoing tubings are empty and dry when you press the <MEASURE> key. The
instrument detects the sharp change of the measurement signal caused by the sample
entering the cell.
Measuring parameters