Campbell-scientific CR800 and CR850 Measurement and Control Systems Uživatelský manuál stáhnout pdf (Strana 447)

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Section 11. Glossary

447

UPS

Uninterrubtablepowersupply.AUPScanbeconstructedformost

dataloggerapplicationsusingaclinepower,anac/acorac/dcwall

adapter,achargecontroller,andarechargeablebattery.

UserProgram

TheCRBasicprogramwrittenbytheCR800userintheCRBasicEditoror

theShortCutprogramgenerator.

USR:

AportionofCR800memorydedicatedtothestorageofimageorother

files.

URI

uniformresourceidentifier

URL

uniformresourcelocater

variable

ApacketofCR800memorygivenanalphanumericname,whichholdsa

potentiallychangingnumberorstring.

Vac

Voltsalternatingcurrent.AlsoVAC.Mainsorgridpowerishigh‐level

Vac,usually110Vacor220Vacatafixedfrequencyof50Hzor60Hz.

High‐levelVacisusedasaprimarypowersourceforCampbellScientific

powersupplies.Donotconnecthigh‐levelVacdirectl

ytotheCR800.

TheCR800measuresvaryingfrequenciesoflow‐levelVacintherange

of±20Vac.

Vdc

Voltsdirectcurrent.AlsoVDC.TheCR800operateswithanominal12‐

Vdcpowersupply.Itcansupplynominal12Vdc,regulated5Vdc,and

variableexcitationinthe±2.5Vdcrange.Itmeasuresanalogvoltagein

the±5.0‐Vdcrangeandpulsevoltageinthe±20‐Vdcrange.

Voltmeter

Aninexpensiveandreadilyavailabledeviceusefulintroubleshooting

dataacquisitionsystemfaults.

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