Work Safety Instructions; Technical Parameters - VWR VE2 Manual De Instrucciones

1.2. WORK SAFETY INSTRUCTIONS

Used symbols:
WARNING!: Risk of injury
CAUTION: Potential damage to the device or pipet-
ting errors
Long-lasting and faultless working of the pipettor
depends to a large extent on its operation. Read the
pipettor operating instructions carefully and comply with
the principles included.
CAUTION:
• Pipettor is designed to work with the tips only. Do not
aspirate liquids without tips attached.
Aspirated liquid should not get into the pipettor as this
may damage it.
• Use only the pipettor with the tips attached.
• One time use of a tip guarantees safety and eliminates
possible contamination of the aspirated liquid.
• Keep the pipettor clean; do not clean it with chemically
aggressive substances (e.g. acetone).
• Do not hold the pipettor horizontally if there is liquid in
the tip.
• Only use pipettes in accordance with the manufacturer
instruction to ensure the proper parameters of pipettes.
• The pipettor should be calibrated after replacing the
plunger.
• In case of improper operation of the pipettor, clean the
pipettor carefully following the instructions given or
send it to the service representative.
WARNING!
• Follow the laboratory work safety regulations.
• Exercise extreme caution while pipetting chemically
aggressive substances. Use the protective equipment,
glasses and gloves.
• Never direct the pipette with the tip attached towards
yourself or anyone else when there is the liquid in it.
• Use only the spare parts and accessories recommended
by the manufacturer.
3

1.3. TECHNICAL PARAMETERS

VWR UHP (Ultra High-Performance) pipettors are high
quality laboratory instruments, which provide the highest
measurement accuracy and precision.
Accuracy errors and repeatability of liquid volume mea-
surements depend on quality of the applied tips. The
errors provided in the table have been obtained using
VWR tips.
CAUTION: Only those tips guarantee correct compatibility
with the pipettors and ensure accurate and repeatable
liquid aspiration.
Volume Accuracy
Model
[μl] [%]
Min 0.2 ± 12.0
VWR VE2 1.0 ± 2.7
Max 2.0 ± 1.5
Min 0.5 ± 4.0
VWR VE10 5.0 ± 1.0
Max 10.0
± 0.5
Min 2 ± 3.0
VWR VE20 10 ± 1.0
Max 20
± 0.8
Min 5 ± 2.5
VWR VE50 25 ± 1.0
Max 50 ± 0.8
± 1.6
Min 10
VWR VE100 50 ± 0.8
Max 100
± 0.8
± 1.2
Min 20
VWR VE200 100 ± 0.8
Max 200
± 0.6
± 0.9
Min 100
VWR VE1000 500 ± 0.7
Max 1000
± 0.6
Table 1
Accuracy errors and repeatability have been determined
with VWR tips, using a gravimetric method, performing at
least 10 measurements of distilled water at the tempera-
ture 20°±1°C, according to EN ISO 8655 standard.
The pipettor design enables the user to perform calibra-
tion process according to the rules presented in section 5.
ENGLISH
Precision Increment Fits to tips
[%] [μl] [μl]
≤ 6.0
≤ 1.3
0.002
≤ 0.7
10
≤ 2.8
≤ 0.6
0.01
≤ 0.4
≤ 1.5
≤ 0.5
0.02
≤ 0.3
≤ 1.3
≤ 0.5
0.05
≤ 0.3
200
≤ 0.80
≤ 0.24
0.1
≤ 0.20
≤ 0.60
≤ 0.25
0.2
≤ 0.20
≤ 0.40
≤ 0.20
1 1000
≤ 0.15
4