Setting The Volume - VWR Signature Ergonomic Benutzerhandbuch

button to expose the top of the ejector stem. Using a
small screwdriver, turn counter clockwise to increase the
length of the ejector and clockwise to reduce the length.
If the above method is not sufficient or the diameter of
the ejector opening is too large to eject the tip properly,
it is necessary to place the ejector cap "M" onto the ejector
(Fig. 6C).
- Model VWR VE2 and VWR VE10 pipettors (Fig. 6D):
The 2 μl - 10 μl pipettors may require the use of an ejec-
tor cap to efficiently eject certain brands of pipettor tips.
Simply place the cap, supplied with the pipettor, on the
bottom of the pipettor shaft and slide the cap upwards
until it surrounds the bottom of the tip ejector.
The VWR Signature ™
instrument, which offers excellent accuracy and precision.
The figures for accuracy and precision given in the
following table were obtained using VWR tips. These
figures are only guaranteed when VWR tips are used.
Volume
Model
[μl]
0.2
VWR VE2
1.0
VWR V2*
Max. 2.0
Min. 0.5
VWR VE10
5.0
VWR V10*
Max. 10.0
Min. 2
VWR VE20
10
VWR V20*
Max. 20
Min. 5
VWR VE50
25
VWR V50*
Max. 50
Min. 10
VWR VE100
50
VWR V100*
Max. 100
Min. 20
VWR VE200
100
VWR V200*
Max. 200
Min. 50
VWR VE250
125
VWR V250*
Max. 250
Min. 100
VWR VE1000
500
VWR V1000*
Max. 1000
Min. 1000
VWR VE5000
2500
VWR V5000*
Max. 5000
Min. 1000
VWR VE10000
5000
VWR V10000*
Max. 10000
* no ejector
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Pipettor is a high quality
Accuracy Precision
[%] [%]
± 12.0 6.0
± 2.7 1.3
± 1.5 0.7
± 4.0 2.8
± 1.0 0.6
± 0.5 0.4
± 3.0 1.5
± 1.0 0.5
± 0.8 0.3
± 2.5 2.0
± 1.0 0.6
± 0.8 0.4
± 1.6 0.80
± 0.8 0.24
± 0.8 0.20
± 1.2 0.60
± 0.8 0.25
± 0.6 0.20
± 1.0 0.4
± 0.8 0.3
± 0.6 0.3
± 1.6 0.40
± 0.7 0.20
± 0.6 0.15
± 0.6 0.25
± 0.6 0.20
± 0.5 0.15
± 2.5 0.6
± 0.8
0.3
± 0.5 0.2
These specifications are obtained in forward mode, using
a gravimetric method with the temperature of the distilled
water, tips and all other conditions stabilized between
19°C and 21°C. Number of measurements - minimum 10.
The values given include all components of error due to
both normal handwarming and the chan ging of the tip.
Performance tests: The VWR Signature
calibrated based on EN ISO 8655. Performance can be
verified by checking the pipettor using the procedures
outlined in the EN ISO 8655 standard.
The pipettor design enables the user to perform the
recalibration process according to the rules presented
in section 8.

2 - SETTING THE VOLUME

The volume display consists of three numbers and is
read from top to bottom. The three numbers indicate
the volume selected and are colored black and red.
For the VWR VE2/V2 to VWR VE250/V250 pipettors, the
numbers in black represent microliters and the numbers
in red represent tenths and hundredths of microliters.
For the VWR VE1000/V1000 to VE10000/V10000 pipettors,
the numbers in red represent milliliters and the numbers
in black represent hundredths of milliliters.
AN EXAMPLE FOR EACH
OF THESE PIPETTORS IS GIVEN BELOW
VWR VWR VWR
VE2/V2 VE10/V10 VE20/V20
1 0
2 red 7
red red
5 5
1.25 μl 7.5 μl 12.5 μl
VWR VWR VWR
VE200/V200 VE250/V250 VE1000/V1000
1 2
2 2
5 5
125 μl 225 μl 0.75 ml
The volume of the pipettor is set by the knob in the pipet-
ting pushbutton (Fig. 1A2) or by the adjustment knob
(Fig. 1B).
The volume adjustment can be performed when the locking
ring is set in the lower position (Fig. 5A). When the
desired volume is selected, the locking ring should be
set in the upper position (Fig. 5B).
ENGLISH
™
Pipettor is
VWR VWR
VE50/V50 VE100/V100
1 0 0
2 3 7
red
5 5 5
35 μl 75 μl
VWR VWR
VE5000/V5000 VE10000/V10000
red red
0 1 0
7 2 7
5 5 5
1.25 ml 7.5 ml
red
red
4