Operating instructions

32 METTLER TOLEDO DE40/50/51 Density Meter
8.4 Limit time
This option is used to set the limit time. When this time limit is reached, the measurement is
stopped and the measured value taken, even if it is not stable.
Enter the limit time (enter 0 s for no
limit time).
8.5 Sequence (sampling, drain, rinse, purge)
This option is used to set a sample sequence. This sample sequence is mainly used together
with the sampling pump ASU-DE or with the sample changer SC24. It can be used as a SOP
(Standard Operating Procedure) with the ASU-DE. This sample sequence allows you to
define sampling time, drain time, rinsing times (for two different solutions) and purge time.
Select sequence "On" with the →
key to set a sample sequence.
Confirm with <ENTER>.
Select the input mode of the
sampling time:
Set : Manual input, time is set by
operator.
Auto: Automatic setting of sampling
time. (see section 8.7)
Off : No sampling.
If you have selected "Set" you have to enter the sampling time (0 to 9999 s). For most of the
non viscous samples we recommend a sampling time of 5 s. Once you have set the sampling
time, adjust the sampling speed (Sampling Adj. control on the ASU-DE or on SC24) in order
to get the sample in with this sample time.
If you have selected "Auto" you have
to enter the "Over Sampling Rate"
and the "Sampling Limit".
Measuring parameters
Method 0 < Meas.Parameter > VA
Method Name :[Method-0]
Measurement Temp.:[ 20.00]°C
Stability :[1]
Limit Time :[ 600]s
Sequence : Off On
Method 0 < Meas.Parameter > VA
Sampling : Off Set Auto
Sampling Time :[ 5]s
Drain : Off Set Auto
Drain Time :[ 10]s
Rinse-1 : Off Set
Method 0 < Meas.Parameter > VA
Sampling : Off Set Auto
O.S.Rate :[ 70]%
Sampling Limit :[ 0]s
Drain Time : Off Set Auto
Drain Time : [ 10]s
Method 0 < Meas.Parameter > VA
Method Name :[Method-0]
Measurement Temp.:[ 20.00]°C
Stability :[1]
Limit Time :[ 600]s
Sequence : Off On