Campbell CR850 - Page 437

Section 11. Glossary
437
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.438).
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.
offset
aterm,oftenaparameterinaCRBasicmeasurementinstruction,to
designatethey‐intercept,shiftingfactor,orzeroingfactorinalinear
function.Forexample,whenconverting°Cto°F,theequationis°F=
°C*1.8+32.Thefactor32istheoffset.
Ohm
Theunitofresistance.SymbolistheGreekletterOmega(Ω).1.0Ω
equalstheratioof1.0Voltdividedby1.0Amp.
Ohm'sLaw
Describestherelationshipofcurrentandresistancetovoltage.Voltage
equalstheproductofcurrentandresistance(V=I*R).
on‐linedatatransfer
Routinetransferofdatatoaperipherallefton‐site.Transferis
controlledbytheprogramenteredinthedatalogger.