20
19
User Calibration Procedure
MICROLIT BEATUS is laboratory calibrated at its nominal volume.
However, due to changes in environmental conditions and the viscosity
of the media / fluids which are dispensed, we recommend gravimetric
volume testing every 3-12 months.
Gravimetric volume testing, in accordance with DIN EN ISO 8655-6, is performed
as follows (for measurement conditions, see section12):
Re-calibration
Set the instrument to the nominal volume or any other volume which is most
commonly used by you. Follow the common rules for calibration used in
statistical quality control (ISO 8655-5).
Set the volume and dispense five full volumes of distilled water at 20°C on an
electronic balance to establish the actual mean volume of liquid dispensed.
If the gravitational average result varies from the volume displayed, you should
re-calibrate the instrument.
12.
1.
2.
3.
4.
Maintenance / Cleaning
MICROLIT BEATUS should be cleaned in the following situations:
Immediately when the piston is difficult to move
Before changing the reagent
Prior to long term storage
Prior to dismantling the instrument
Prior to autoclaving
Prior to changing the valve
Regularly when using liquids which form deposits (e.g. crystallizing liquids)
Regularly, when liquids accumulate in the cap.
All maintenance/cleaning procedures should be carried out while wearing
suitable eye protection and protective clothing.
When in doubt, consult your safety officer.
Make sure that the instrument is completely empty.
Place the instrument into an empty sink together with its reservoir.
Unscrew the threaded platform base from the reservoir and lift the instrument's
intake tube carefully out of the reservoir, whilst tapping it against the reservoir's
aperture to shake off any droplets from the intake tube.
Hold the dispensing nozzle over the aperture of the reservoir and apply gentle
piston strokes in order to return any contents into the reservoir.
Empty the instrument completely and flush thoroughly with distilled water.
If the piston barrel is still not completely clean, you need to disassemble
the instrument. (Refer to section 14)
13.
•
•
•
•
•
•
•
•
•
•
•
•
•
•
Fig.
12.2
For re-calibration, pull the cap outwards to
expose the calibration nut.
(Fig. 12.1)
Using the calibration tool, turn the calibration nut
clockwise to reduce the volume and anticlockwise
to increase it.
Repeat this procedure till the desired volume is
achieved on the electronic balance.
(Fig. 12.2)
Fig.
12.1
