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TROUBLESHOOTING
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PIPETMAN L®
Chapter 6
TROUBLESHOOTING
A quick inspection of the pipette may help you to detect a potential problem.
NOTE
You may download the
2 Minute Inspection Poster
from the Gilson website (
www.gilson.com
),
which shows how to perform a quick diagnosis of your pipette.
WARNING
Before returning any pipette to your local Gilson Service Center, ensure that it is
completely free of chemical, biological, or radioactive contamination. Refer to
CLEANING AND DECONTAMINATION
on page 17. Please use the included safety bag to return
the pipette to your local Gilson Service Center.
Troubleshooting Table
The following table may help you to identify and correct the potential problem you might encounter.
For single channel variable and fixed volume models
SYMPTOM
POSSIBLE CAUSE
ACTION
Pipette is leaking
sample
Damaged tip holder
Replace the tip holder
Worn O-ring or seal
Replace both parts and lubricate
Pipette won’t
aspirate
Worn O-ring
Replace both parts and lubricate
Damaged tip holder
Replace the tip holder
Connecting nut is loose
Tighten connecting nut
Damaged or corroded piston
Return pipette to supplier
Improper repair or assembly
Refer to page 14 -
MAINTENANCE
Pipette is inaccurate
Improper repair or assembly
Refer to page 14 -
MAINTENANCE
Unscrew tip holder
Tighten connecting nut
Connecting nut is loose
Tighten connecting nut
Pipette is not precise
Tip holder is loose
Tighten connecting nut
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(s)
Worn O-ring or seal
Replace both parts and lubricate
Tips fall off or do not
fit correctly
Low quality tips
Use PIPETMAN DIAMOND tips
Damaged tip holder(s)
Replace the tip holder(s)
Damaged tip ejector
Replace the tip ejector
Dirty tip holder
Clean the tip holder with isopropanol or ethanol
The tip ejector is loose
Assemble the tip ejector properly
The ejector lock is misaligned
Align the ejector lock
Pipetting seize up
Piston needs lubricant
Lubricate piston assembly
For variable volume multichannel models
SYMPTOM
POSSIBLE CAUSE
ACTION
Tips fall off or do not
fit correctly
Low quality tips
Use PIPETMAN DIAMOND tips
Damaged tip ejector
Replace the tip ejector
Damaged ejector spacer
Replace the ejector spacer
Dirty tip holder(s)
Clean the tip holder(s)with isopropanol or ethanol
Damaged tip holder
Contact your local Gilson authorized service center
Pipette won’t
aspirate
Connecting nut is loose
Tighten the connecting nut
Pipette is inaccurate
Connecting nut is loose
Tighten the connecting nut
Pipette is not
precise
Connecting nut is loose
Tighten the connecting nut
Incorrect operator technique
Operator training
