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Problem
Cause
The plunger or the
O-ring is damaged due
to prolonged aspiration
of corrosive liquids.
The pipet-
tor
The inside of the pipet-
incorrectly
tor is contaminated.
aspirates
the liquid
or the liquid
drops out
The sealing elements
from the tip.
are not sufficiently
lubricated.
The inside of the pipet-
tor is contaminated due
to aspiration of corro-
sive substances.
Uneven
work of the
The inside of the pipet-
pipetting
tor is contaminated due
set, the
to the liquid entering
pipetting
the pipettor.
pushbut-
The sealing elements
ton gets
are not sufficiently
blocked.
lubricated
(e.g., after repeated
autoclaving
procedures).
Liquid with properties
other than water (den-
sity, viscosity).
incorrect
aspiration.
Tips with a filter
with increased flow
resistance.
if the problem persists after carrying out the above
steps, contact our regional representative.
Before returning the pipettor, please ensure the pipettor
is completely free of any chemical, radioactive, or micro-
biological contamination which could pose a threat
during transport and repair.
20 – VWR STandaRd Line PiPeTTORS
Solution
disassemble the
shaft set; wash
the shaft, the
plunger and the
seal (Section 10:
Cleaning). Replace
the elements
with new ones if
necessary.
apply a small
amount of lubricant
onto the plunger
and reassemble the
set in the correct
order.
Unscrew the shaft
set, wash the parts.
Replace the ele-
ments with new
ones if necessary.
apply a small
amount of lubricant
on the plunger and
reassemble the set
in the correct order.
Calibrate the
pipettor using the
liquid which is to be
pipetted.
Calibrate the pipet-
tor using the tips
which are to be
used for pipetting.
12. Spare Parts
Contact our Customer Service to inquire about avail-
ability of spare parts. Pipettor model and name of the
part required should be specified. The most common
parts are depicted below.
NOTE: The replacement of the plunger requires
conducting the calibration procedure according to
Section 9.
*Seal (J) used only in models 2, 5,000 and 10,000 μL
Item
Description
C,
Shaft with O-ring and
I,
seal
J*
B
S
F
G
G
J*
I
C
D
M
L
Model (μL)
Cat. No. Qty/Pk
2
SP19121
10
SP19122
20
SP19123
100
SP19124
200
SP19125
1,000
SP19127
5,000
SP19128
10,000
SP19129
instruction Manual – 21
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