Gilson pipetman - Standard Readjustment

ENGLISH
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Adjustment
Pressthemode-buttontoenterthemenu.Select“conguration”byrotatingthepush-buttonandclick
toconrmyourselection.Enterthesub-menuinthesamewayandselectthe“adjustment”menu.
The adjustment menu allows you to access the following items:
• StandardReadjustment
• ResetSettings
Standard Readjustment
Thismenuallowsyoutoadjustthepipetteusing3calibrationpoints:10%,50%and100%ofnominal
volume(inaccordingwithISO8655recommendations).
You may want to calibrate your pipette for solutions with a density, viscosity, surface tension or vapour
pressure that are dierent to that of water. To return to the factory settings, choose “ResetSettings”,
your PIPETMAN M will be reset to the three factory calibration values which are permanently stored
inthepipette’srmware.
InaccordancewithISO8655Gilsonrecommendsagravimetricprocedureforpipettecalibration.This
gravimetric method is used to establish the mean mass of a given volume of water (taking into account
evaporation losses, where necessary). After converting the mean mass to a volume (using the Z factor,
see appendix II), enter the measured volumes(s) into the pipette’s memory and the software readjusts
the pipette accordingly. This method requires the strict monitoring of environmental conditions and
the use of routinely controlled equipment that is adapted to the volume being measured.
Conversion to volume must take into account the density of the liquid as well as evaporation during
thecycletime.Foreachmeasurement,thecorrespondingvolume(Vi)canbecalculatedasfollows:
Wiistheweightasreadonthebalance
e is the mean evaporation loss during the cycle time
Z expressed in L/mg, is a conversion factor incorporating density of water buoyed in air,
at test temperature and barometric pressure (see Appendix II)
Forvolumesgreaterthan20μL,theevaporationfactorcanbedisregarded.
Formoreinformationpleasereferto“VericationProcedureforAccuracyandPrecision”whichyoucan
download from the Gilson website (www.gilson.com).
Maintenance operations
(disassembly of your PIPETMAN M to change and clean parts)
It is best to inspect your pipette regularly and to routinely
clean and change parts as required. To help you to keep
up a regular schedule and in the interests of GLP, you can
congureyourpipettetodisplayanalarmbeforeservicing
isdue(refertoServiceSettings,page18).
Vi=(Wi+e)Z
The following maintenance
operation should only be done
when the pipette is in Mode
DISASSEMBLY (see page 18)!