Liquistation CSF48
Endress+Hauser 9
Mode of operation with a
peristaltic pump
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Sampling steps with a peristaltic pump
Sampling takes place in three steps:
1. Rinse
The peristaltic pump runs in reverse and forces medium back to the sampling point.
2. Intake
The peristaltic pump runs forward and draws in medium. If the medium detection system detects
the sample, the pump is controlled by the flow and the specified sample volume is calculated
automatically.
3. Drain
The pump runs in reverse again and forces the medium back to the sampling point.
One advantage this system offers for obtaining a representative sample is the possibility of rinsing the
suction line several times:
Medium is initially drawn in until the medium detection system reacts, then the pump switches and
forces the medium back to the sampling point. This process can be repeated a maximum of three times.
The sample is then taken as described.
The pump rollers deform the hose, thereby causing a negative pressure and the suction effect.
The medium detection system is based on a pressure sensor which detects the difference between a
pipe that is filled and not filled.
Thanks to a patented process for automatically detecting the suction height, the user does not have to
enter the suction height or suction line length. The self-learning software guarantees that the sample
volume remains constant.
An optional safety switch integrated in the pump housing immediately switches off the pump when
the pump is opened (recommended if third-party staff are performing maintenance work).
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Peristaltic pump
1
2
3
4
Pump tubing
Safety switch (optional)
Pump rollers
Medium detection system (patented)
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