15
Symptom
Possible Cause
Refer to page
Pipette is leaking sample
Damaged tip-holder(s)
17-19
(one or more channels)
Worn O-ring.
17-19
Pipette won’t aspirate
Worn O-ring.
17-19
Damaged
tip-holder(s).
17-19
Connecting nut is loose.
18
Damaged or corroded piston.
17-19
Improper repair or assembly.
16-19
Noisy operation
Piston(s) needs lubricating.
20
Pipette is inaccurate
Improper repair or assembly.
16-19
Pipette is out of adjustment.
29-31
Connecting nut is loose.
18
Pipette is not precise
Connecting nut is loose.
18
Volume setting not locked.
7
Incorrect operator technique.
9-12
Damaged or corroded piston(s).
17-19
Damaged
tip-holder(s).
17-19
Worn
O-ring. 17-19
Tips fall off
Low quality tips.
8-9
or Damaged
tip-holder(s).
17-19
don't fi t
Adjustment of tip-ejector stroke
12-13
No LCD display
Pipette is not swiched on.
5
Battery has failed.
24-25
• Flashing display when volume set is out of
specifi cations.
• Cycle counter when pipette has been readjusted
(see Chapter 15).
• Channel number embossed on the head of each
pipette for Multichannel.
• Useful volume-range is printed on the push-button
and the cover-ejector.
11 TROUBLESHOOTING
Before returning any pipette, ensure that it
is completely free of chemical, biological, or
radioactive contamination. Use the safety
bag provided by Gilson.
You may be able to identify and to correct the problem
by reference to the following table.
Summary of Contents for Pipetman Ultra 12x20
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