Campbell-scientific CR800 and CR850 Measurement and Control Systems Manual de usuario descargar pdf (Pagina 431)

100

101

Section 11. Glossary

431

EarthGround

Agroundingrodorothersuitabledevicethatelectricallytiesasystem

ordevicetotheearth.Earthgroundisasinkforelectricaltransientsand

possiblydamagingpotentials,suchasthoseproducedbyanearby

lightningstrike.Earthgroundisthepreferredreferencepotentialfor

analogvoltagemeasurements.Noteth

atmostobjectshavea"an

electricalpotential"andthepotentialatdifferentplacesontheearth‐

evenafewmetersaway‐maybedifferent.

engineeringunits

Unitsthatexplicitlydescribephenomena,asopposedtotheCR800

measurementunitsofmilliVoltsorcounts.

ESD

Electrostaticdischarge

ESS

EnvironmentalSensorStation

excitation

Applicationofaprecisevoltage,usuallytoaresistivebridgecircuit.

executiontime

Timerequiredtoexecuteaninstructionorgroupofinstructions.Ifthe

executiontimeofaprogramexceedstheScan() Interval,theprogramis

executedlessfrequentlythanprogrammed.

expression

Aseriesofwords,operators,ornumbersthatproduceavalueorresult.

Glossary.FileControl

File Control is a feature of LoggerNet, PC400 and RTDAQ

(p. 76)

datalogger support software. It provides a view of the CR800 file

system and a menu of file management commands:

Delete facilitates deletion of a specified file

Send facilitates transfer of a file (typically a CRBasic program file) from

PC memory to CR800 memory.

Retrieve facilitates collection of files viewed in File Control. If

collecting a data file from a CF card with Retrieve, first stop the

CR800 program or data corruption may result.

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