Metrohm 772 Pump Unit - Manual (Page 29)

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6 Troubleshooting
772 Pump Unit
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6 Troubleshooting
6.1 Problems
Problem Cause Remedy
The flow is not set
correctly. The flow is too strong or
too weak. Loosen or tighten the locking lever with the
clamping screw.
The liquid is not
aspirated, but just
"bubbles" instead. The inlet tubing and the
outlet tubing have been
switched. Switch the tubings so that the inlet tubing
goes into the solution and the outlet tubing
goes into the waste canister.
The peristaltic pump
is not running. The connecting cable is not
connected. Connect the connecting cable.
The peristaltic pump
is pumping too little
or not at all. The pressure clamp is set
insufficiently or not at all. Set the correct pressure using the locking lever
and clamping screw.
The tubing clamp is pinch-
ing off the tubing. Fasten the tubing end piece and the tubing
olive in the tubing clip correctly. The tubing
clamp must clamp the tubing in the area of
the tubing olive.
The tubing connec-
tion of the inlet tub-
ing and/or outlet
tubing is dripping. The tubings are not
screwed on correctly. Check the screw connectors.
The tubing connec-
tion of the pump
tubing is dripping or
spraying. The pressure is too high. Loosen the locking lever of the pressure clamp
slightly.
If necessary, also use a cable tie to tie down
the cable ends at the tubing olives.