Hach TenSette plus Basic User Manual page 11

9.4 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 10.
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.
Section 10 Troubleshooting
Problem
Leakage
Inaccurate
dispensing
Inaccurate
dispensing with
certain liquids
Not dispensing
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.
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