Troubleshooting - Hach Thermo Fisher TenSette plus Manuel De L'utilisateur

Storage
When the Hach TenSette plus is not in use, make sure it is stored in an upright position. The use of
the Hach pipette stand (Item no. BBP088) is recommended for this purpose.
Sterilization
Burn hazard. Obey safe handling protocols during contact with hot components. Wear the appropriate
protective equipment during maintenance or service activities.
The tip cone module can be sterilized by autoclaving it at 121 °C (250 °F) for 20 minutes. You can
use steam sterilization bags if needed. Disassemble and reassemble the tip cone module. Refer to
Pipette lubrication on page 15.
After autoclaving, the module must be cooled to room temperature for at least two hours. Before
pipetting, make sure that the module is dry. It is recommended to check the calibration after every
sterilization cycle.

Troubleshooting

Problem
Leakage
Inaccurate dispensing
Inaccurate dispensing
with certain liquids
Not dispensing
16 English
W A R N I N G
Possible cause
Tip incorrectly attached
Foreign particles between tip and tip cone
Foreign particles between the piston, the
O-ring and the cylinder
Insufficient amount of grease on cylinder
and O-ring
O-ring damaged
Incorrect operation
Tip incorrectly attached
Calibration altered: caused by misuse, for
example
Unsuitable calibration. High viscosity
liquids may require recalibration
Pistons stuck or not connected
Solution
Attach firmly
Clean tip cones. Attach new tips.
Clean and grease the O-ring and cylinder.
Grease accordingly
Change the O-ring.
Follow the instructions carefully.
Attach firmly
Recalibrate according to the instructions.
Recalibrate with the liquids in question.
Remove the tip cone module. Move the
piston by hand or with piston removal tool.
Attach the module in service mode.