Owner manual

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.