Troubleshooting - BRAND Titrette 4760141 Mode D'emploi

13 Troubleshooting

Problem
Liquid is above the piston
Piston sluggish
Filling not possible
Filling not possible / liquid moves back
when filling in the titration tube
Air bubbles in the instrument
Titration not possible
Dispensed volume less than indicated
The instrument does not show any
function
9974 69
Possible cause
Piston leaky
Dispensing cartridge contam-
inated or damaged by crystal
deposits
Filling valve stuck
Discharge valve contami-
nated or titration tube dam-
aged
Instrument filled too quickly Fill instrument slowly
Filling tube is loose or dam-
aged
Filling valve loose or seal
possibly not inserted
Filling tube does not im-
merse into
liquid
Recirculation tube not in-
stalled or installed incor-
rectly
Discharge valve stuck
The instrument has not been
fully primed
Seal possibly not inserted or
filling valve loose
Filling valve is stuck or dam-
aged
Internal error
13 Troubleshooting
What to do
Perform cleaning, replace
dispensing cartridge (see
Cleaning, p. 68).
Perform cleaning, possibly
replace dispensing cartridge,
see Cleaning, p. 68).
Clean filling valve, possibly
dislodge valve ball with a 200
µl plastic pipette tip (see Dis-
lodging a stick valve
ball, p. 73).
Clean discharge valve, or re-
place titration tube (see
Cleaning, p. 68).
Firmly attach telescopic fill-
ing tube, possibly cut the
tube off approx. 1 cm from
top, or replace tube.
Check if the seal is inserted
and tighten valve with as-
sembly tool.
Fill bottle, or correct the
length of the telescopic filling
tube.
Install the recirculation tube.
The opening must face away
from the bottle wall.
Clean titration tube with inte-
grated discharge valve, or re-
place titration tube (see
Cleaning, p. 68).
Prime instrument again (see
page 9)
Check if the seal is inserted
and tighten valve with as-
sembly tool.
Clean filling valve. If neces-
sary, replace it (see Intensive
cleaning, p. 70).
Restart instrument:
Remove battery, wait 1
minute and reinsert battery
(see Replacing the batter-
ies, p. 74).
Operating manual
75