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Pipetman® pipettes are easy
to maintain. They can be easily dismantled and cleaned right
in your own laboratory. Original Gilson replacement parts
are always available from Mandel. Expert servicing is available
from recalibration to a complete overhaul. Gilson pipettes
will ensure the highest possible accuracy and precision, year
after year.
Here are a few symptoms of improper use and solutions
to keep maintenance costs down.
Caring for your Pipette
View or print the Gilson Pipetman®
Two-minute Inspection
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| Problem |
Leaking at the Base of the
Tip |
| Solution |
Use genuine Gilson tips
Not only do Gilson tips offer the finest quality but they
are also the only tips designed specifically for Pipetman.
A special sealing ring assures a perfect fit which is the
only way to obtain results which systematically conform with
Pipetman specifications.
Check the tip holder
Check the tip holder for scratches, wear, cracks or dirt at
the point where the tip fits on. Dirty tip holders should
be cleaned in a weak cleansing solution. Those with stubborn
stains or scratches should be replaced. Check for blockages
in the end of the tip holder. Removal of dirt or other foreign
matter should be restricted to washing or lightly tapping
on a bench. Never attempt to dig out blockages with a sharp
tool. Top |
| Problem |
Worn Piston |
| Solution |
Make sure the pipette is being used correctly
A worn piston can sometimes be temporarily corrected by replacing
the seal and the 'O' ring. However, more often this indicates
that the piston has become severely corroded due to improper
use of the instrument and should be replaced. A piston
should only be replaced by a qualified Gilson representative. Top |
| Problem |
Jamming of the Operation Rod |
| Solution |
Careful handling
When the push-button is depressed, the action should be smooth.
If this is not the case, the operating rod maybe damaged or
bent (this can occur when a pipette is dropped). The rod needs
to be replaced and the pipette should be recalibrated. A
rod should only be replaced by a qualified Gilson representative. Top |
| Problem |
Poor, Inconsistent Results |
| Solution |
Change the piston seal and the 'O' ring
Worn piston seals and 'O' rings can cause leaking and lead
to inaccuracies. A good seal should move freely about the
piston with a slight resistance to sliding. It should never
drop freely under its own weight. Pipetman seals will withstand
a minimum of 100,000 operations. But if they show any signs
of wear or collected dirt particles, both the seal and 'O'
ring should be changed. Top |
| Problem |
Corrosion or Staining |
| Solution |
Never leave pipettes on their side with
liquid still in the tip
When not in use, pipettes should be placed vertically on a
stable pipette stand such as the Gilson Carrousel™ or
a Single™ wall-hanger. Otherwise liquid will run back
into the tip holder and possibly damage the piston.
Operate with care
Like all precision instruments, Pipetman needs to be operated
with care. If the push-button is allowed to spring back too
quickly, the pistons will be splashed causing possible corrosion.
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