Campbell-scientific CR800 and CR850 Measurement and Control Systems Manual de usuario descargar pdf (Pagina 446)

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101

Section 11. Glossary

446

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terminalemulator

Acommand‐lineshellthatfacilitatestheissuanceoflow‐level

commandstoadataloggerorsomeothercompatibledevice.A

terminalemulatorisavailableinmostdataloggersupportsoftware

availablefromCampbellScientific.

thermistor

Athermistorisaresistiveelementwhosechangeinresistancewith

temperatureiswide,stable,andwell‐characterized.Itcanbeusedasa

devicetomeasuretemperature.Theoutputofathermistorisusually

non‐linear,someasurementrequireslinearization,usuallybymeansof

theSteinhart‐Hartoranotherpoly

nomialequation.CampbellScientific

thermistors,models107,108,and109,arelinearizedbySteinhart‐Hart

asimplementedintheTherm107(),Therm108(),andTherm109()

instructions.

throughput

Thethroughputrateistherateatwhichameasurementcanbetaken,

scaledtoengineeringunits,andthereadingstoredinadatatable.The

CR800hastheabilitytoscansensorsatarateexceedingthethroughput

rate.Theprimaryfactoraffectingthroughputrateistheamountof

processingspecifiedbytheus

er.Insequential‐modeoperation,all

processingcalledforbyaninstructionmustbecompletedbefore

movingontothenextinstruction.

TTL

Transistor‐transistorlogic.Aserialprotocolusing0Vdcand5Vdcas

logicsignallevels.

TLS

Transportlayersecurity.AnInternetcommunicationssecurityprotocol.

toggle

Toreversethecurrentpowerstate.

UINT2

Datatypeusedforefficientstorageoftotalizedpulsecounts,port

status(statusof16portsstoredinonevariable,forexample)orinteger

valuesthatstorebinaryflags.

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