wtw PB 150, Operating Manual

Page: 15 / 108

Overview
15
1.4 Sampling modes
A sample to be analyzed must be representative for the sampling loca-
tion and the conditions prevailing there.
Using the different modes of the PB 150, you can adjust the sampling
to the local conditions.
The following sampling modes are possible:
l
Sampling according to time
l
Sampling according to flow
– with analog flow signal
– with digital flow signal
l
Sampling according to events
(example: if the measured value is above or below the limit value, a
signal is transmitted to the sampler)
l
Combined sampling:
according to time or flow and according to events
1.4.1 Sampling according to time
Samples are taken at regular intervals, e. g. every 10 minutes. The
dosing volume of the individual samples remains the same.
Example: Setting in the menu:
Time interval: 10 min
Filling of the sample bottles: 2 hours
Result:
Each sample bottle is filled with the specified dosing
volume 12 times within 2 hours.