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Prior pipettes calibration start, it is necessary to install a dedicated set inside the draft shield. The set
is not a standard balance equipment. The picture below presents set installation. Evaporation ring
minimizes measurement errors being a result of evaporation of liquid occurring in course of the
weighing process.
Prior to pipettes calibration pour 2/3 of the evaporation ring with distilled water. The set is ready to be
used after about 1 hour – it takes this long for humidity to stabilize. Excess water can be removed
using automatic pump or an external pipette.
To minimize any humidity changes inside the chamber and to avoid air draft influence while opening
the door, dose the liquid from a pipette to an evaporation ring via an opening of a weighing chamber
lid.
With thus prepared balance you can start pipettes calibration procedure.
11.14.1. Additional settings of pipettes calibration mode
Apart from standard settings for this mode (i.e. weighing mode settings) some additional parameters
have been designed to describe operation of the mode.
Additional settings list:
•
VOLUME DETERMINATION
– allows to predefine number of tested volumes for a particular
pipette. For pipettes with fixed volume please set parameter <1>, for pipettes with adjustable
volume set parameter <2> and <3>.
•
MEASUR. NO
– allows to predefine number of measurements for each tested volume. Number
of measurements ranges from 6 to 20.
•
AUTOMATIC TARING
- allows to turn on function of automatic taring of dosed portion of water
after confirmation of measurement (value set to <YES>)
Remember to select correct values of the above options before pipettes calibration procedure is
performed. The settings should reflect expectations and needs being a result of working environment.
F Shortcut Keys
You can declare which particular weighing function is to be launched using F1, F2, F3 or F4 keys.
For procedure informing you how to declare the particular function, read
F Shortcut Keys
section.
11.14.2. Means of Operation
•
Enter <PIPETTES CALIBRATION.> mode.
•
Start the process.
•
Follow the prompts to set the correct options.
•
Enter the ambient temperature, next press ENTER for confirmation. The computer software
proceeds to the next step, i.e. ambient humidity settings.
Summary of Contents for PS 200/2000 R2
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