Hach-Lange TENSETTE plus User Manual - Handbuch (Seite 31)

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Section 6 Maintenance
When the Hach TenSette plus is not in use, make sure it is stored in
an upright position. We recommend the Hach pipette stand (Cat. No.:
BBP088) for this purpose.
6.1 Daily checking
The pipette should be checked at the beginning of each day for dust
and dirt on the outside surfaces of the pipette. Particular attention
should be paid to the tip cone. No other solvents except 70% ethanol
should be used to clean the pipette.
6.2 Maintenance
If the pipette is used daily it should be checked and lubricated every
three months.
1. The maintenance procedure starts with choosing the
Service-mode from the menu (MENU → OPTIONS →
SERVICE).
2. Press the trigger ( Figure 3 on page 32 , item 2 ) before
disassembling the pipette.
3. Pull down the complete tip cone module ( Figure 4 on page 33 ).
4. Note that the tip ejector button is in fully up position ( Figure 3 on
page 32 , item 1 ).
5. Remove the complete tip cone module ( Figure 4 on page 33 ) by
pulling it out.
6. Seperate the tip ejector sleeves (top and bottom) by pulling it into
two parts.
7. Push the snap fittings ( Figure 4 on page 33 , item 6 ) to release
the cylinder and remove the cylinder ( Figure 4 on page 33 ,
item 4 ).
8. Push forward and clean the piston ( Figure 4 on page 33 , item 7 )
with a dry napless cloth.
9. Check the the complete tip cone module for foreign particles.
10. Grease the cleaned parts with the lubricant that comes with the
pipette.
11. Reassemble the the tip cone module in reverse order.
Note: In order to make the reassembling of the tip cone module easier,
position the connecting pieces of the upper and the lower part
accordingly one above the other. Press now both parts together until you
hear a “click”.