Campbell-scientific CR800 and CR850 Measurement and Control Systems Manual de usuario descargar pdf (Pagina 430)

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Section 11. Glossary

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DHCP

DynamicHostConfigurationProtocol.ATCP/IPapplicationprotocol.

differential

Asensorormeasurementterminalwhereintheanalogvoltagesignalis

carriedontwoleads.Thephenomenonmeasuredisproportionaltothe

differenceinvoltagebetweenthetwoleads.

digital

Numericallypresenteddata.

Dim

ACRBasiccommandfordeclaringanddimensioningvariables.Variables

declaredwithDimremainhiddenduringdataloggeroperations.

dimension

Tocodeforavariablearray.DIMexample(3)createsthethreevariables

example(1),example(2),andexample(3).DIMexample(3,3)createsnine

variables.DIMexample(3,3,3)creates27variables.

DNS

Domainnamesystem.ATCP/IPapplicationprotocol.

DTE

Dataterminalequipment.Whilethetermhasmuchwidermeaning,in

thelimitedcontextofpracticalusewiththeCR800,itdenotesthepin

configuration,gender,andfunctionofanRS‐232port.TheRS‐232port

ontheCR800andonmanythird‐partytelecommunicationsdevices,

suchasadigit

alcellularmodems,areDCE.Attachmentofanull‐modem

cabletoaDCEdeviceeffectivelyconvertsittoaDTEdevice.

Duplex

Canbehalforfull.Full‐duplexissimultaneous,bidirectionaldata.

Duplex

Thepercentageofavailabletimeafeatureisinanactivestate.For

example,iftheCR800isprogrammedwith1secondscaninterval,but

theprogramcompletesafteronly100millisecond,theprogramcanbe

saidtohavea10%dutycycle.

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