Heidolph PD 5001 Mode D'emploi page 56

IEI
When cassette is interlocked with multi-channel pump head exert some pull force on both ends of
the hose to prevent hose from looping.
To adjust roller contact pressure, turn setting knob until inboard wedge reads between 3 and 4 on
the scale; refer to Chapter 5.1.1 to optimize roller contact pressure.
56