Technical data
ASP station 2000 peristaltic
124
Hauser
10
Technical data
10.1
Function and system design
10.1.1
Sampling principle
A hose pump is used to suck in and dose the sampling liquid. The pump hose is periodically twisted
by rollers running along the circumference of the hose, thereby generating a pump effect. The
medium detection system controls the electronic volume calculation.
The medium detection system is a new system developed by Hauser. A pressure sensor is
at the heart of the system. The pressure sensor detects the difference between a full and empty
pump line.
The advantages of the Hauser system:
• Intelligent: the suction height is automatically detected and does not have to be configured
• Maintenance-free: ceramic membrane
Fig. 64:
How the hose pump works
Sampling takes place in three steps:
Fig. 65:
Sampling steps
• Rinsing the suction line: the sampling liquid is sucked in until the medium detection system is
triggered. Then the pump runs backwards and pushes the liquid back to the sampling point. The
rinsing process can be repeated up to three times.
• Sucking the sampling liquid: the sampling liquid is sucked from the sampling point to the sampler
and the sample volume is calculated electronically by totalising the pump rotations.
• Emptying the suction line: after sampling, the liquid left over in the suction line is pumped back
to the sampling point.
Medium
detection
Pump
hose
Rotor
roller
Pump
rotor
Rinse
Suck
Purge
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