Campbell-scientific CR800 and CR850 Measurement and Control Systems Manuel d'utilisateur Page 441

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Vue de la page 440
Section 11. Glossary
441
resistor
Adevicethatprovidesaknownquantityofresistance.
resolution
Ameasureofthefinenessofameasurement.SeealsoAccuracy,
Precision,andResolution
(p.449).
ringline(Pin3)
Linepulledhighbyanexternaldeviceto"awaken"theCR800.
RingMemory
Amemoryconfigurationfordatatablesallowingtheoldestdatatobe
overwritten.Thisisthedefaultsettingfordatatables.
ringing
Oscillationofsensoroutput(voltageorcurrent)thatoccurswhen
sensorexcitationcausesparasiticcapacitancesandinductancesto
resonate.
RMS
Rootmeansquare,orquadraticmean.Ameasureofthemagnitudeof
waveorothervaryingquantitiesaroundzero.
RS232
RecommendedStandard232.Aloosestandarddefininghowtwo
computingdevicescancommunicatewitheachother.The
implementationofRS232inCampbellScientificdataloggerstoPC
communicationsisquiterigid,buttransparenttomostusers.
ImplementationofRS232inCampbellScientificdataloggertoRS232
smartsensorc
ommunicationsisquiteflexible.
samplerate
Therateatwhichmeasurementsaremade.Themeasurementsample
rateisprimarilyofinterestwhenconsideringtheeffectoftimeskew
(i.e.,howcloseintimeareaseriesofmeasurements).Themaximum
sampleratesaretheratesatwhichmeasurementsaremadewhen
initiatedbyasingleinstructionwithm
ultiplerepetitions.
scaninterval
ThetimeintervalbetweeninitiatingeachexecutionofagivenScan()of
aCRBasicprogram.IftheScan()Intervalisevenlydivisibleinto24hours
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