Troubleshooting
Trouble
Piston difficult to move
Air bubbles appear
in the Instrument
Dispensing not possible
Wrong Dispenser
Volume
Barrel does not
fill with liquid
Filling Not Possible
12. vwr.com I Instruction manual VWR
Possible cause
Formation of crystals, dirty
Reagent with high vapor
pressure has been drawn
in too quickly
The instrument has not
been primed
Filling tube is loose or
damaged
Liquid reservoir is empty
Too fast filling action
Leaking Piston
Leaking discharge valve
Blocked Dispense nozzle
Discharge valve stuck
Instrument not calibrated
Inlet tube not fitted
firmly
Volume adjustment to
minimum setting
Bottle Top Dispenser with Recirculation Valve
®
Solution
Stop dispensing immedately.
Loosen piston with circular
motion, but do not
disassemble.
Follow all cleaning instructions.
Slowly draw in reagent.
Prime the instrument.
Push the filling tube on firmly. if
necessary cut off approx. 1 cm
of the tube at upper end and
then re-connect it or replace
filling tube.
Refill reservoir and prime unit.
Fill & Dispence slowly
Clean piston, If Problem persist
replace piston.
Clean by flushing throughly
with distilled water.
Disassemble the dispense
nozzle and flush through
with distilled water.
Clean Unit by immersing valve
assembly in distilled water
Follow steps of user
calibration.
Connect inlet tube correctly.
Set to required volume.