Toshiba LF622 Manual

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Introduction
TheelectromagneticflowmeterusesFaraday’sLawof
electromagneticinductiontomeasuretheprocessflow.
Thedeviceconsistsoftwounits:adetector,through
which the fluid to be measured flows and in which
low-level signals proportional to flow rates are
obtained; and a converter, which supplies excitation
currenttothedetector,andamplifiesthesignalsfrom
thedetectorandthenprocessesandconvertsthesignals
intothe4–20mAdccurrentsignal orcommunication
signal. Combined with a multi-functional converter
LF620 (combined type) or LF622 (separate type)
equippedwithitsoriginalpatentednoise-suppression
circuitandadvancedalgorithms.TheGF630hasavery
hightolerancetonoise,givingtheunitaverystable
outputevenforslurryfluidmeasurement.IR(Infrared)
switchesenabletheparametersettingoftheconverter
withoutremovingthecover.Flowdirectioncanbeset
ineitherway,anditsunique128x128dotmatrixLCD
displayallowstheLCDtoberotatedelectronicallyto
90,180and270degreeswithoutopeningthecover.
TheterminalblockinLCDsidemakeeasytowirein
caseofthecombinedtype.
TheAF900hand-heldterminal(HART*
1
communicator)canbeusedtocommunicatewiththe
flowmeterfromaremoteplace.PROFIBUS-PA*
2
or
Modbus*
3
interfaceisavailableasanoption.

*1: HARTprotocol(HighwayAddressableRemoteTransducer)isacommunication
protocolforindustrialsensorsrecommendedbytheHCF(HARTCommunication
Foundation).
*2:PROFIBUSisthecommunicationprotocolforfactoryandprocessautomationthat
thePROFIBUSOrganizationrecommends.Insteadofanalogcontrolwitha
conventionalanalogsignal(4-20mA),itisfieldbuswhichdigitizesallsignals.
FlowmeterssupportPROFIBUS-PA.
*3:ModbusisthecommunicationprotocolthatModiconInc.developed.Physical
layerisRS485.
Combined type
Combined typeCombined type
Combined type
GF630/LF620
GF630/LF620GF630/LF620
GF630/LF620
GF630/LF620F
GF630/LF620FGF630/LF620F
GF630/LF620F
Separate
SeparateSeparate
Separate type
type type
type
GF632/LF622
GF632/LF622GF632/LF622
GF632/LF622
GF632/LF622F
GF632/LF622FGF632/LF622F
GF632/LF622F

Figure1.Configuration
 

GF630/LF600 GF632 LF602
 
Figure2.
Figure2. Figure2.
Figure2. GF630 Premium Value series
GF630 Premium Value seriesGF630 Premium Value series
GF630 Premium Value series
Flow
Flow Flow
Flowmeters
metersmeters
meters
Specifications
OverallSpecifications
Measurementrangeintermsofflowvelocity:
0
 –  0.3  m/sto0  –10  m/s(0  –1.0  ft/sto0  –  32.8  ft/s).
0
 –  0.1  m/sto0  –  0.3  m/s(0  –  0.3  ft/sto0  –  1.0  ft/s)
rangeisavailableoptionallyformetersize1/2”to
18”(15to450mm).
Accuracy:
<1/2"to18”(15mmto450mm)>
±
±±
±0.2%ofRate
*1.

*Thispulseoutputerrorresultisestablishedunderstandard
operatingconditionsatToshiba'sadmittedflowcalibration
facility.
*Individualmetermeasurementerrormayvaryupto±0.5%of
Rateat1.64ft/s(0.5m/s)ormore.Oritmayvaryupto±0.3%
ofrate±0.039inch/s(1mm/s)at1.64ft/s(0.5m/s)orless.
*Currentoutput:plus±8µA(0.05%ofspan).
*Refertoindividualcalibrationdataforeachindividualmeter's
measurementerror.
FieldIntelligentDevice–PremiumValueSeries
ElectromagneticFlowmeter
GF630/LF620

GF632/LF622

15to600mm(1/2"to24")

Certification
number
Z01207
GF630/LF620
GF630/LF620GF630/LF620
GF630/LF620
GF630/LF620F
GF630/LF620F GF630/LF620F
GF630/LF620F
GF632
GF632GF632
GF632
LF622
LF622LF622
LF622
LF622F
LF622F LF622F
LF622F
Certification
No.PM09896
ForPUlinedflowmeter


Toshiba LF622 Specifications

General

Brand	Toshiba
Model	LF622
Category	Measuring Instruments
Language	English