Campbell-scientific CR3000 Micrologger Bedienungsanleitung PDF herunterladen (Seite 473)

100

101

Section 11. Glossary

473

watchdogtimer

Anerror‐checkingsystemthatexaminestheprocessorstate,software

timers,andprogram‐relatedcounterswhenthedataloggerisrunningits

program.Iftheprocessorhasbombedorisneglectingstandardsystem

updatesorifthecountersareoutsidethelimits,thewatchdogtimer

resetstheprocessorandprogramexecutio

n.Voltagesurgesand

transientscancausethewatchdogtimertoresettheprocessorand

programexecution.Whenthewatchdogtimerresetstheprocessorand

programexecution,anerrorcountisincrementedinthe

WatchdogTimerentryoftheStatustable

(p.530).Alownumber(1to10)

ofwatchdogtimerresetsisofconcern,butnormallyindicatestheuser

shouldjustmonitorthesituation.Alargenumber(>10)oferrors

accumulatingoverashortperiodoftimeshouldcauseincreasingalarm

sinceitindicatesahardwareorsoftwareproblemmayexist.Whenlar

ge

numbersofwatchdog‐timerresetsoccur,consultwithaCampbell

Scientificapplicationsengineer.

weathertight

Describesaninstrumentationenclosureimpenetrablebycommon

environmentalconditions.Duringextraordinaryweatherevents,

however,sealsontheenclosuremaybebreached.

WebAPI

ApplicationProgrammingInterface(seesectionWebAPI

,formore

information).

Glossary.WildCard

acharacterorexpressionthatsubstitutesforanyothercharacteror

expression.

XML

Extensiblemarkuplanguage.

UserProgram

TheCRBasicprogramwrittenbytheCR3000userinCRBasicEditoror

ShortCut.

11.2 Concepts

11.2.1 Accuracy, Precision, and Resolution

Three terms often confused are accuracy, precision, and resolution. Accuracy is a

measure of the correctness of a single measurement, or the group of

measurements in the aggregate. Precision is a measure of the repeatability of a

1 2 ... 468 469 470 471 472 473 474 475 476 477 478 ... 589 590

Kommentare zu diesen Handbüchern

Keine Kommentare

Campbell-scientific CR3000 Micrologger Bedienungsanleitung Seite 473

Kommentare zu diesen Handbüchern

Verwandte Produkte und Handbücher für Messgeräte Campbell-scientific CR3000 Micrologger