Multichannel Systems PPS2 Manual - Manual (Page 8)

Peristaltic Pump Manual
6
For connecting or changing the tubes, please open the screw and remove the bracket of the
pump revolver. Insert the provided tube and fix it with the luer tube connectors in the denoted
way. To remount the bracket, take care to insert the bar of the bracket into the corresponding
socket on the pump housing. Fix the screw firmly.
If you do not need the droplet isolator, please use the circlet and connect the heads
of the tube with a luer adapter.
2.2.1 Use of Droplet Isolators
The droplet isolators can be used to disrupt the direct liquid column from the pump to the
sample. This can help to remove low frequency noise originating from the pulsation of the
pump head. On the other hand, the droplet isolators make the flow speed inaccurate, and
cause a continued flow even after the pump is stopped. If the flow rate is high (approximate
> 6 – 8 ml/min) the droplet isolators will fill up over time and might even overflow.
The suggested procedure is to start working without the droplet isolators, and use them only
in case unacceptable fluctuations caused by the pump occur in the recordings which can not
be removed otherwise, for example by using a 10 Hz high pass filter.