Gilson PIPETMAN F Series, Manual

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10
PIPETMAN
®
F
8 - trouBLESHootInG
If there is a leak or the pipette is not accurate,
check for the following:
• The connecting nut is loose.
Tighten the connecting nut.
• The tip-holder is cracked or scored.
Remove the tip ejector and inspect the tip-
holder. For F2 to F20 models, if the tip-holder
is damaged, the piston may also be damaged.
Replace the damaged parts (see Chapter 9).
When re-assembling the pipette, the connecting
nut should be hand tightened.
• Chemical damage to the piston and seals.
Replace the piston and seals (see Chapter 9).
Wash the inside of the tip-holder using distilled
water.
• Improper reassembly.
Disassemble the pipette and reassemble the
pipette correctly.
If there is liquid in the tip-holder, clean the
pipette as follows:
• Remove the tip ejector. Unscrew the connecting
nut and rinse the tip-holder, piston, seal and
O-ring with distilled water. Dry these parts and
reassemble the pipette.
If necessary, the tip-holder, connecting nut and
the tip ejector can be autoclaved for 20 minutes
at 121°C and at 0.1 MPa pressure. The seal and
the O-ring should not be autoclaved.
If there is an air bubble when the sample is
aspirated:
• Dispense the sample into its original vessel.
• Ensure that the tip is properly immersed in the
sample liquid.
• Aspirate the sample more slowly.
If the bubble appears a second time, replace
the tip.