Buchi PrepChrom C-700 Manuel d'utilisateur télécharger pdf (Page 24)

4|Descriptionoffunction BÜCHILabortechnikAG

24/110 PrepChromC700

4.3.3 Controlunit

Thesystemiscontrolledbythecentralprocessingunitviaa10.1"touchscreen,

thekeyboardandmousecanbeusedoptionally.Theoperatorusesthecontrol

softwaretorunthedevice.

Thecontrolunitcentralizestheconnectionfordatatotheothermodules.

4USBconnectorsareavailable,1intherearand3ontherightsideofthe

touchscreen(cablemaximumlength=2m).

4.3.4 Pump

Fig.7:Pumpmodulecomponents

1 Checkvalve 2 Pumphead

3 Fromthe4wayaspirationvalve 4 Leaksensor

5 Chamber,pressuresensor 6 Tothemixingchamber

The2headpumpdeliversmobilephaseatflowratesbetween5–250mL/min

withlowresidualpulsation.Itisahighperformancedoublepistonpump(recip

rocalmovement).Asystem(pulleys+belt),asteppermotordrives2camson

whichleanthe2pistons.Theirmotiongeneratesacycleandthencreatesthe

aspiration.

Astaticmixingchamberattheoutletensuresasuitablemixingofsolvents

whatevertheworkingflowrateis.

Asensordetectsleakages.Thepumpisinterruptedifaleakageoccursandthe

userisinformedviathetouchscreen.

Apressuresensormonitorsthecurrentpressure.Ifthepressureishigherthan

100barthepumpwillbeswitchedofftopreventanydamagetothesystem.

NOTE

Whenworkingwithaqueoussolutions,residuesmightcollectbehindthepiston

seals.Theseresiduesmustberemovedsincetheycancontributetoafaster

wearingoftheseals.Rinsingofthepistoncleaningdiscisdescribedin7.2.4

Piston cleaning disc, cleaning [} page90]

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Buchi PrepChrom C-700 Manuel d'utilisateur Page 24