Campbell-scientific CR3000 Micrologger Uživatelský manuál stáhnout pdf (Strana 461)

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Section 11. Glossary

461

multi‐meter

Aninexpensiveandreadilyavailabledeviceusefulintroubleshooting

data‐acquisitionsystemfaults.

multipler

aterm,oftenaparameterinaCRBasicmeasurementinstruction,to

designatetheslope,scalingfactor,orgaininalinearfunction.For

example,whenconverting°Cto°F,theequationis°F=°C*1.8+32.The

factor1.8isthemultiplier.

mV

TheSIabbreviationformilliVolts.

NAN

Notanumber.Adatawordindicatingameasurementorprocessing

error.Voltageover‐range,SDI‐12sensorerror,andundefined

mathematicalresultscanproduceNAN.

NeighborDevice

DevicesinaPakBus®networkthatcancommunicatedirectlywithan

individualdevicewithoutbeingroutedthroughanintermediatedevice.

SeePakBus

(p.463).

NIST

NationalInstituteofStandardsandTechnology

Node

PartofthedescriptionofadataloggernetworkwhenusingLoggerNet.

Eachnoderepresentsadevicethatthecommunicationsserverwilldial

throughorcommunicatewithindividually.Nodesareorganizedasa

hierarchywithallnodesaccessedbythesamedevice(parentnode)

enteredaschildnodes.Anodecanbebot

haparentandachild.

NSEC

Eight‐bytedatatypedividedupasfourbytesofsecondssince1990and

fourbytesofnanosecondsintothesecond.

Null‐modem

Adevice,usuallyamulti‐conductorcable,whichconvertsanRS‐232

portfromDCEtoDTEorfromDTEtoDCE.

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