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14. Trouble shooting
Problem
Piston with difficulty to
move
Filling not possible
Instrument does not
dispense liquid
Air bubbles in the
instrument
Dispensed volume is too
low
Possible cause
Dirt, possible formation of crystals
-Volume adjusted to minimum setting
-Sticking filling valve
- Closing cap is on
-Discharge tube not firmly connected
or damaged
- Reagent with high vapor pressure
has been poured too quickly.
-Seal not inserted, knurled locking
nuts not firmly connected
-Air not expelled from the instrument
-Filling tube not firmly connected or
damaged
-Valves dirty, not firmly installed or
damaged
-Discharge tube not firmly connected
or damaged
-Filling tube not firmly connected or
damaged
-Valves
not
firmly
damaged
-Sticky filling valve
-Stop dispensing immediately.
Loosen the piston by circular
motion without disassembling.
Follow all the cleaning
instructions.
-Set the required volume
-Clean the filling valve and
replace with sealing washer if
necessary.
-Remove closing cap
-Push on the closing cap. Hold
the piston in place, and push
the original manufacturer's
discharge tube on firmly.
Replace a deformed or
damaged discharge tube.
-Pour the reagent slowly.
-Double check that seal (12) is
in place, and that the knurled
locking nuts at the discharge
tube are firmly seated and
finger tightened
-Priming the instrument
-Push the filling tube on firmly.
If necessary cut off
approx. 1 cm of tube at the
upper end and reconnect it
or replace filling tube.
-Cleaning procedure. Tighten
the valves using the mounting
tool. If necessary, replace the
valves and
sealing washers.
-Push
manufacturer's tube on firmly.
-Cleaning procedure. Push the
filling tube on firmly. If this
does not suffice, cut off
approx. 1 cm of tube at the
upper end and re-connect it or
replace filling tube.
installed
or
-Clean the instrument. Tighten
the valves using the mounting
tool, if necessary replace the
valves and sealing washers.
- Clean or replace discharge
tube, if necessary.
11
Corrective action
the
original
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