Campbell-scientific CR800 and CR850 Measurement and Control Systems Instrukcja Użytkownika Pobierz pdf (Strona 425)

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Section 11. Glossary

11.1 Terms

ac

SeeVac

(p.447).

accuracy

Ameasureofthecorrectnessofameasurement.Seealsotheappendix

Accuracy,Precision,andResolution

(p.449).

A/D

Analog‐to‐digitalconversion.Theprocessthattranslatesanalogvoltage

levelstodigitalvalues.

Amperes(Amps)

Baseunitforelectriccurrent.Usedtoquantifythecapacityofapower

sourceortherequirementsofapower‐consumingdevice.

analog

Datapresentedascontinuouslyvariableelectricalsignals.

argument

Seeparameter

(p.438).

ASCII/ANSI

AbbreviationforAmericanStandardCodeforInformationInterchange/

AmericanNationalStandardsInstitute.Anencodingschemeinwhich

numbersfrom0‐127(ASCII)or0‐255(ANSI)areusedtorepresentpre‐

definedalphanumericcharacters.Eachnumberisusuallystoredand

transmittedas8binarydigits(8bits),resulti

ngin1byteofstorageper

characteroftext.

asynchronous

Thetransmissionofdatabetweenatransmittingandareceivingdevice

occursasaseriesofzerosandones.Forthedatatobe"read"correctly,

thereceivingdevicemustbeginreadingattheproperpointinthe

series.Inasynchronouscommunication,thiscoordinationis

accomplishedbyhavingeachcharactersurr

oundedbyoneormore

startandstopbitswhichdesignatethebeginningandendingpointsof

theinformation(seesynchronous

(p.445)).

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