Full Text Searchable PDF User Manual

M U L T I C H A N N E L
5648 Copley Drive
San Diego, CA 92111
Phone 1-800-456-7741

M U L T I C H A N N E L

M U L T I C H A N N E L
6

1
2
M U L T I C H A N N E L
clockwise in relation to the handle, (Fig. 2), it is
possible to disable the ejector’s operation
in order to avoid accidental use, or to change
its position in such a way as to make filling
of microplates more convenient.
The specifications for accuracy and precision
given in the following table are obtained using
CLP
tips. These figures are only guaranteed
when
CLP
tips are used.
channel
channel
The specifications for the volumetric perfor-
mance are derived from extensive gravimetric
tests as prescribed by the Deutsches Institut für
Normung e.V. To verify the performance of your
pipette request document DIN 12650.
Condition of measurments: distilled water at tem-
perature 20±1°C
The pipette design enables the user to perform
the recalibration process according to the rules
presented in section 5.
CONTENTS
1 - INTRODUCTION
2 - VOLUME SETTING
3 - METHOD OF PIPETTING
4 - RECOMMENDATIONS
5 - RECALIBRATION
6 - MAINTENANCE
7 - PIPETTE KIT AND ACCESSORIES
8 - SPARE PARTS
1 - INTRODUCTION
series of adjustable multichannel
pipettes have been designed for the filling of la-
boratory microplates. The pipettes enable precise
and simultaneous delivery of 8 or 12 preset-vol-
ume doses of liquid.
pipettes are
produced in four ranges of volumes: 1-10 µl,
5-50 µl, 20-200 µl, 50-300 µl.
pipettes are equipped with a digital
readout counter, built into the pipette’s handle,
for measuring doses, (Fig. 1F). Volume settings
are continously adjustable and are controlled by
means of the rotating calibration knob, (Fig 1B).
The volume range of the pipette is shown on
the pipetting pushbutton, (Fig. 1A).
pipettes should be used with poly-
propylene disposable tips, to ensure safety and
accuracy, (Fig. 1C). The shafts without
O-rings ensure the compatibility of the pipettes
with a broad assortment of tips, and the special
ejector shape reduces the force required for
their ejection. In order to protect the user
against inadvertent contact with used tips, the
pipettes are equipped with tip ejectors,
(Fig. 1D). By turning the multichannel module
8.10
Min 1
±8.0
≤
8.0
Max 10
±2.0
≤
2.0
8.50
Min 5
±4.0
≤
3.0
Max 50
±1.6
≤
1.0
8.200
Min 20
±2.0
≤
1.5
Max 200
±1.0
≤
0.8
8.300
Min 50
±1.6
≤
1.5
Max 300
±1.0
≤
0.8
Cat. No.
Volume
Inaccuracy
Imprecision
[µl]
[%]
[%]
Cat. No.
Volume
Inaccuracy
Imprecision
[µl]
[%]
[%]
SPECIFICATIONS
12.50
Min 5
±4.0
≤
3.0
Max 50
±1.6
≤
1.0
12.200
Min 20
±2.0
≤
1.5
Max 200
±1.0
≤
0.8
12.300
Min 50
±1.6
≤
1.5
Max 300
±1.0
≤
0.8
SPECIFICATIONS

3
4
M U L T I C H A N N E L
Next, still holding the pipette vertically, the ope-
rator should press the pipetting button until the
first resistance point is felt, and immerse the tips
in the liquid to the depth of 2-4 mm, (Fig. 3B).
Releasing the pipetting button with a slow and
uniform movement during 2-3 seconds, the liquid
should be drawn into the tips, (Fig. 3B) which
should then be lifted above the liquid’s surface.
The pipette should next be positioned at an
angle of 10-45 degrees in relation to inner walls
of destination vessels and tips should
be emptied by pressing the pipetting button
slowly until the first resistance point is felt,
(Fig. 3C). After waiting one second, the pipetting
button should be pressed to the second resis-
tance point in order to expel remaining liquid,
(Fig. 3D). Then tips should be lifted out from the
vessels while maintaining contact between
the ends of the tips and the inner walls of the
vessel until the pipetting button has been rela-
sed, (Fig. 3E). Finally, pressing the ejector but-
ton, the operator should separate the tips from
multichannel module’s cones, (Fig. 3F).
4 - RECOMMENDATIONS
To achieve maximum safety, precision and re-
liability, the following principles should be ob-
served:
• do not draw liquids without tips fitted on the
pipette cones,
• do not lay down the pipette with tips filled,
• do not draw volumes of liquid exceeding the
pipette’s range,
• check if the tips are fitted properly,
• during operation, the pipette must be held ver-
tically, tips should be immersed in liquid
to the depth of 2 to 4 milimeters and the pipet-
ting button should be depressed and released
slowly and evenly,
• new tips must be re-wetted prior to pipetting,
by drawing and expelling the liquid to be me-
asured. This is especially important when wor-
king with liquids of viscosities and densities
different from that of water and in temperatu-
res different from ambient temperature,
2 - SETTING THE VOLUME
In order to set the volume of the dose to be deli-
vered, the calibration knob with counter is used.
The volume shown by the counter is represented
by three digits, which should be read from top
to bottom. Typical meter readings are shown in
the following table:
To achieve accurate delivery of the required
volume, the operator should turn the calibration
knob in the direction diminishing counter rea-
dings. If the volume being currently set is higher
than the previous one, the operator should turn
the calibration knob 1/3 of a turn beyond the
required value, and then slowly rotate it back-
wards, observing diminishing readings, until the
required value is achieved.
3 - METHOD OF PIPETTING
Fit the tips onto the cones of the multichannel
module. When you put the tips on the shafts the
pipette should be pressed against the tips in the
box. The liquid aspirated into the tips should
not flow out by gravity from properly fixed tips.
While holding the pipette in a vertical position,
tips should be immersed in the liquid to a depth
of 2-4 mm, and flushed once by drawing a dose
of liquid and dispensing it out with slow and
steady movement.
Cat.No.
Counter
readings
Set
volume
Basic
degree
0
3
5
2
5
0
0
8
5
0
6
5
8.10
8.50
12.50
8.200
12.200
8.300
12.300
3.5 µl
6.5 µl
85.0 µl
250.0 µl
0.02 µl
0.10 µl
0.20 µl
1.0 µl

M U L T I C H A N N E L
6
The recalibration can be performed within one
full turn of the key to the right or to the left only.
Recalibration conditions:
• Ambient temperature and the temperature of
the pipette, tips and liquid should be within
the range 20-25°C and stabilized during weigh-
ing within ±0.5°C
• Measurements should be conducted using
distilled water
• Balance sensitivity should be suitable for the
volume to be controlled
Recalibration procedure:
• Set the dose volume depending on the pipette
volume according to the following table:
• Perform three aspiration series (each series
should include the aspirations from all chan-
nels), weigh each time and calculate the aver-
age value of the aspirations.
• Calculate average aspirated volume in µl mul-
tiplying the average aspiration amount [mg]
by the distilled water density coefficient
[µl/mg], which depends on temperature and
pressure according to the following table:
5
• when pipeting liquids which tend to wet walls
of tips, such as serums, proteins, organic sol-
vents, measuring must be performed much
slower than with other liquids,
• tips must be replaced with new ones, when
changing from one liquid to another, or if drops
of liquid remain inside the tips,
• after work, the pipette should be stored verti-
cally in a holder with tips removed.
5 - RECALIBRATION
CLP
pipettes are calibrated by gravimetric met-
hod, using
CLP
tips and distilled water, at the
temperature 20±1°C, according to DIN 12650.
If during pipette operation you find that the
accuracy error (the difference between the real
aspirated volume and the preset volume)
exceeds the permissible value given in the table
in section 1, the pipette recalibration procedure
should be carried out.
Before starting the recalibration it is necessary
to check whether the following requirements
have been fulfilled during error determination:
• the ambient temperature, and the temperature
of the pipette, tips and water was identical
• the density of the liquid used is close to that
of distilled water
• the balance with appropriate sensitivity has
been used
• mg/µl conversion factor has been taken into
account
• the requirements given in sections 3 and 4
have been fulfilled
If the above conditions are satisfied and the accu-
racy error for selected volume given in section 1
exceeds the permissible value, the pipette
recalibration procedure should be carried out.
Volume checked [µl]
0.1 - 10
10 - 100
≥
100
Balance sensitivity [mg]
≤
0.001
≤
0.01
≤
0.1
Temperature [°C]
Pressure [hPa]
960
1013
1067
20
1.0028
1.0029
1.0029
21
1.0031
1.0032
1.0032
22
1.0032
1.0033
1.0033
23
1.0035
1.0035
1.0036
24
1.0037
1.0038
1.0038
25
1.0039
1.0040
1.0041
1 - 10
5 - 50
20 - 200
50 - 300
1
5
20
50
0.92 - 1.08
4.8 - 5.2
19.6 - 20.4
49.2 - 50.8
0.33
1.67
6.30
10.00
Range
of the pipette
volumes [µl]
Preset
volume
[µl]
Permissible
volumes
[µl]
Volume change
∆
V for
full turn of the calibra-
tion key [µl]
(24 increments)

Accessories
8 - SPARE PARTS
Please see Fig.1 and Fig. 4:
1. Pushbutton
2. Ejector pushbutton
3. Calibration knob
4. Ejector
5. Piston assembly
6. Calibration key
These items can be ordered from Continental
Laboratory Products. (Please specify pipette
type and part name when ordering).
Before returning a pipette to us for service,
please ensure that the pipette is completely free
of any chemical, biological or radioactive conta-
mination please provide information on the kind
of liquids that have been measured.
Warning: The replacement of the plunger
requires conducting of calibration proce-
dure according to section 5.
7
8
M U L T I C H A N N E L
If the average aspirated volume exceeds the
permissible value, the following should be done:
• Remove the pipetting pushbutton, (Fig. 4A),
• Holding the volume setting knob to protect
it against rotation, insert the calibration key
into the cuts of the calibration screw, (Fig. 4B),
• Turn the key clockwise to reduce the aspirat-
ed volume, or counter-clockwise to increase
the volume. One full turn of the calibration key
changes the pipette aspiration volume by the
amount given in the table, (Fig. 4C),
• Take out the key and fix the pipetting push-
button, (Fig. 4D).
Determine the average aspirated volume. The
average volume should be within the permissi-
ble range given in the table. If the volume
exceeds the values stated, the recalibration pro-
cedure should be repeated.
6 - MAINTENANCE
Cones should be kept clean using ethyl alcohol.
7 - PIPETTE KIT AND ACCESSORIES
Pipette kit
The pipettes are delivered in the kits including:
• Pipette
• Instruction manual
• Calibration key
• Pipette shelf clip
• Identification labels
The pipette shelf clip diagram is shown in Fig. 5.
B/02/2001
Pipettor
Tip Choices
2342 10 µl, XL, 10 racks of 96
2040 10µl, 10 racks of 96
BT10 10µl filter tip, sterile, DNase, RNase and pyrogen free, 10 racks of 96
BT10XL 10µl filter tip, extra long, sterile, DNase, RNase and pyrogen free,
10 racks of 96
2102.C 200µl tip, graduated, slimline, 10 racks of 96
BT100 100µ filter tip, sterile, DNase, RNase and pyrogen free, 10 racks of 96
2092 300µl tip, graduated, slimline, 10 racks of 96
BT200 200µl filter tip, sterile, DNase, RNase and pyrogen free,
10 racks of 96 (max volume is 200µl)
8.10
8
12
8 and 12
8.50
12.50
8.200
12.200
8.300
12.300
Pipettor
Stand Choices
9575 Stand for 8 channel
9576 Stand for 12 channel
9577 Carousel Stand for single and multichannels