Campbell-scientific CR3000 Micrologger Bedienungsanleitung Seite 467

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Seitenansicht 466
Section 11. Glossary
467
Thisistheprinciplebehindthermocoupletemperaturemeasurement.It
alsocausessmall,correctablevoltageoffsetsinCR3000measurement
circuitry.
Semaphore(MeasurementSemaphore)
Insequentialmode,whenthemainscanexecutes,itlockstheresources
associatedwithmeasurements,i.e.,itacquiresthemeasurement
semaphore.Thisisatthescanlevel,soallsubscanswithinthescan
(whethertheymakemeasurementsornot),willlockoutmeasurements
fromslowsequences(includingthesy
stembackgroundcalibration).
Lockingmeasurementresourcesatthescanlevelgivesnoninterrupted
measurementexecutionofthemainscan.
Send
TheSendbuttonindataloggersupportsoftware
(p.76).TheSend
commandsendsaCRBasicprogram,oranoperatingsystem,toa
CR3000.
serial
Aloosetermdenotingoutputoradevicethatoutputsanelectronic
seriesofalphanumericcharacters.
ShortCutsoftware
ACRBasicprogramgeneratorsuitableformanyCR3000applications.
KnowledgeofCRBasicisnotrequired.ShortCutisavailableatno
chargeatwww.campbellsci.com.
SI(SystèmeInternationale)
TheInternationalSystemofUnits.
signature
Anumberwhichisafunctionofthedataandthesequenceofdatain
memory.Itisderivedusinganalgorithmwhichassuresa99.998%
probabilitythatifeitherthedataorthedatasequencechanges,the
signaturechanges.
singleended
Denotesasensorormeasurementterminalwhereintheanalogvoltage
signaliscarriedonasinglelead,whichismeasuredwithrespectto
ground.
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