Campbell CR850 - Page 430

Section 11. Glossary
430


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.