VWR VWRA613-6688, Manual

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• To decrease the volume, turn the
volume setting knob clockwise.
• To increase the volume, turn the
volume setting knob counterclock-
wise.
• Do make sure that the desired
delivery volume is set in-line with
pointer.
• Turn the volume lock to “lock” the
volume setting, preventing any
accidental change in the volume
during pipetting.
For this pipette the delivery volume
of liquid is set using the digital
display. A pointer is used to set
exact or intermediate volumes
using the scale on the last wheel of
digital display (refer point # 4.6)
The Locking mechanism ensures that the volume
adjustment knob remains at the setpoint while aspirating or
dispensing sample liquids. Any effort to rotate the volume
adjustment knob with the locking mechanism engaged will
damage the locking mechanism and void the warranty.
5.2 SETTING THE VOLUME
• To set the volume turn the volume lock lever to the “unlock”
position so that the volume can be adjusted to the desired
setpoint within the permitted volume range. Refer
following images
• After pipetting acids or other corrosive liquids that emit
vapors, remove the tip-cone and rinse the piston, O-ring
and seal with distilled water.
• Do not pipette liquids having temperatures above 70°C.
(Not recommendable)
• Make sure that liquids never enter the tip-cone. To
prevent this:
Avoid laying the pipette horizontally when tip is filled
with sample. As liquid may enter in and contaminate the
sample during next pipetting cycle.
When there is liquid in the tip, press and release the
volume adjustment knob slowly and smoothly.
Never turn the pipette upside down.
• Always store the pipette without tip on a shelf mounting
stand supplied with or a pipette carousel stand.
• Highly recommended to calibrate the pipette once in
every 3-6 months (depending on the sensitivity of
usage) for better performance. The calibration must be
carried by gravimetric method in accordance of DIN ISO
8655-6.