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Problem
Cause
The inside of the pipet-
tor is contaminated due
to aspiration of aggres-
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-
ton gets
No lubrication on the
blocked.
sealing elements,
(e.g., after repeated
autoclaving
procedures).
Liquid with properties
other than water (den-
sity, viscosity).
The volume adjustment
Incorrect
knob used in the "CAL"
aspiration.
mode.
Tips with a filter with in-
creased flow resistance.
If the problem continues 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.
22 – VWR UHP PIPETTORS
Solution
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 pi-
pettor using the
liquid which is to be
pipetted.
Calibrate the pipet-
tor according to
Section 9.
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.
NOTE: The replacement of the plunger requires
conducting the calibration procedure according
to Section 9.
Item
Description
A
Pipetting pushbutton
C,
Shaft
I,
with O-ring
(J)
(and seal*)
F
Shaft holder
Plunger assembly
G
with spring
and bushing
I,
O-ring set
(J)
(and seal*)
K
Calibration key
M
Shaft cap
S
Shelf clip
*Seal (J) used only in models 2 and 10 µL
Model
Cat. No. Qty/Pk
All
SP19643
1
2
SP19151
1
10
SP19152
1
20
SP19153
1
100
SP19154
1
200
SP19155
1
1,000
SP19156
1
2/10
SP19671
1
20/100
SP19673
1
2
SP19645
1
10
SP19646
1
20
SP19647
1
100
SP19648
1
200
SP19649
1
1,000
SP19650
1
2
SP19611
10
10
SP19612
10
20
SP19613
10
100
SP19614
10
200
SP19615
10
1,000
SP19616
10
All
SP19674
1
All
SP19644
1
All
SP19483
1
Instruction Manual – 23
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