Maintenance; Troubleshooting - HTL DISCOVERY PRO Manual Del Usuario

Pipette recalibration consists in setting the real value
obtained during weighing on the counter. To do so, the
following should be conducted:
A
B
Fig. 5
• Remove the cap (fig. 1D) using the calibration key
(fig. 5A),
• Set the calibration switch (fig. 1E) in its upper position
(fig. 5A),
• Insert the calibration key into the ejector orifice (fig. 1C)
and place it in the calibration screw of the counter
(fig. 5B),
• Turn the key so as the volume indicated by the counter
is equal to the average calculated volume.
• Remove the calibration key and set the calibration switch
in its lower position (fig. 5C), thus going to the pipetting
mode,
• Place the cap of the ejector pushbutton (fig. 5C).
After conducted the calibration procedure it is recom-
mended to record recalibration.
CAUTION: Before calibration, the volume adjustment
knob should be blocked. If the knob is shifted after
switching the pipette on the calibration mode ("CAL"),
calibration of the pipette will be changed without a visible
change in settings of the counter.

6. MAINTENANCE

The pipette requires periodic maintenance, depending
on the applications performed and intensity of use. The
subassemblies subject to action of aggressive solution
vapors, such as shafts elements, should be regularly
inspected and cleaned.
External surfaces of the handgrip, knob and pushbuttons
may be cleaned with a tissue dipped in isopropyl alcohol.
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C
CAUTION: Before using cleaning agents other than
those recommended by the manufacturer, check the
compatibility charts and consider chemical resistance of
the following plastics: PP, PC, POM, PA, PPS, PVDF
used to produce the pipette parts.
The pipette can be sterilized in the autoclave at the tem-
perature of 121°C for 20 minutes. After sterilization, the
pipette should be dried and cooled down to room tem-
perature. It is recommended to sterilize the pipettes in
autoclave with initial vacuum and drying cycle.
CAUTION:
- Sterilization in other conditions may cause the damage
of the pipette,
- Set the volume adjustment knob in its upper (unlocked)
position before sterilization.
Repeatability of obtained results does not change if the
pipette is operated properly and the autoclaving proce-
dure is conducted appropriately. As there can be a slight
change in the dosing accuracy it is recommended:
- To check calibration of the pipette after 1st, 3rd and 5th
autoclaving procedures, and every 10 autoclaving
cycles during further operation of the pipette.
The pipettes are UV resistant which was confirmed by
our tests. The recommended distance from the radiation
source to exposed element should be not less than
50 cm. Prolonged and very intense UV exposure can
cause de-coloration of pipette parts, without affecting
its performance.

7. TROUBLESHOOTING

If you notice an improper pipette operation, identify the
cause and eliminate the fault. To do this, follow the
instruction in the sequence provided. Replacement of
parts should be required only occasionally, and should
not occur under normal pipette use.
ENGLISH
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