12
* Not applicable for multichannel models
However, if you can’t solve the problem, contact your
Gilson representative.
Symptom Possible Cause
Action
Pipette is
Tip-holder is loose
Tighten connecting nut*
not precise
Connecting nut is loose
Tighten connecting nut
Incorrect operator technique Operator training
Damaged or corroded piston(s) Return pipette to supplier
Damaged tip-holder(s)
Replace the tip-holder*
Worn O-ring or seal
Replace both parts*
Tips fall off or
Low quality tips
Use PIPeTMaN DIaMOND tips
do not fit
Damaged tip-holder(s)
Replace the tip-holder*
correctly
Damaged tip-ejector
Replace tip-ejector
ejector spacer is missing
Mount the spacer on the tip- ejector
The ejector spacer is damaged Replace the ejector spacer
The tip-ejector is loose
assemble the tip-ejector properly
The ejector lock is misaligned align the ejector lock
10 - Leak test
This test may be performed at any time to check that
the pipette does not leak, especially after performing a
maintenance or decontamination procedure. If a pipette
fails this test, replace the O-ring and seal. After making
sure that the pipette is correctly reassembled, repeat this
test (not applicable to multichannel pipettes).
For the P2n to P200n, 8x20, 12x20, 8x200 and 12x200
models:
Fit a PIPETMAN DIAMOND Tip.
Set the pipette to the maximum volume given in the
specifications, and pre-rinse.
Aspirate the set volume from a beaker of distilled
water.
Maintain the pipette in the vertical position and wait
for 20 seconds.
If a water droplet appears at the end of the tip there
is a leak.
If you see no droplet, re-immerse the tip below the
surface of water.
