BrandTech Scientific Dispensette TA - Manual (Page 45)

English
45
Liquid is above the
piston Piston is leaking. Perform a standard cleaning, replace the piston/
cylinder assembly (see page 39-41).
Piston difficult
to move Formation of crystals, dirty Stop dispensing immediately. Follow all cleaning
instructions (page 39-41).
Filling
not possible Volume adjusted to
minimum setting Set to required volume (see page 33).
Filling valve stuck Clean the filling valve.If the valve is stuck use a
200 µl pipette tip to loosen it (see page 40). If
necessary, replace the filling valve and sealing
washer.
Dispensing
not possible Discharge valve stuck Clean discharge valve. If necessary replace dis-
charge tube (see page 40).
Air bubbles in
the instrument Reagent with high vapor
pressure has been drawn in too
quickly Draw in reagent slowly.
Seal not inserted, knurled
locking nuts not firmly
connected Confirm that the seal is in place, and that the
knurled locking nuts at the discharge tube and the
SafetyPrime
™ recirculation valve are firmly seated
and finger tight.
The instrument has not
been primed Prime the instrument (see page 32).
Filling tube is loose or
damaged Push the filling tube on firmly. If necessary, cut
off approx. 1 cm of tube at the upper end and re-
connect it or replace filling tube.
Valves not firmly connected
or damaged Follow cleaning procedure (see page 39, 42).
Tighten the valves using the mounting tool. If nec-
essary, replace the valves and sealing washers.
Recirculation tube not
connected Connect recirculation tube (see page 31, Fig. 5).
Dispensed volume
is too low Discharge tube is loose Push the discharge tube on firmly and finger
thighten locking nuts.
Filling tube is loose
or damaged Cleaning procedure (see page 39-40). Push the
filling tube on firmly. If necessary, cut off approx.
1 cm of the tube at the upper end and re-connect
it or replace filling tube (see page 40).
Filling valve is loose, con-
taminated, or damaged Cleaning procedure (see page 39-40). Tighten
the valves using the mounting tool. If necessary,
replace filling valves and sealing washers.
Liquid leaking at the
safety ring Dispensing cartridge is loose,
or the piston seal is damaged Tighten the safety ring, and if necessary replace
the dispensing cartridge
Leaking liquid
between instrument
and bottle Recirculation tube not con-
nected Connect recirculation tube (see page 31, Fig. 5).
Volatile reagent dispensed
without sealing ring Mount sealing ring.
Problem Possible cause Corrective action
Troubleshooting