Oval EX DELTA II User manual

1
Ins. No. D-585-1-E
Fieldbus type
EX DELTA (In-line, fixed type)
(In-line, hottap type)
Totalizer provided
Less totalizer
Hottap type
Every OVAL EX DELTAⅡis fabricated and shipped from our factory under stringent quality control. In
order to maintain its design performance throughout its life, this manual offers the operator the necessary
installation, operation and maintenance information. Be well familiar with these instructions before you
place the meter in service and keep this manual for ready reference.
Ⅱ

D-585-1-E
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CONTENTS
1. BEFORE YOU BEGIN ................................................................................. 5
1.1 ConrmingtheSpecications ........................................................................ 5
1.2 Transit Considerations.................................................................................... 5
1.3 StorageConsiderations.................................................................................. 5
2. OPERATING CONDITIONS ........................................................................ 5
3. GENERAL ................................................................................................... 6
4. COMPONENT NAMES .............................................................................. 6
5. PIPING INSTRUCTIONS ............................................................................ 9
5.1 StandardPipingConditions .......................................................................... 9
5.2 PipestobeUsed......................................................................................... 10
5.3 LocationofPressureGageandThermometerTaps.................................... 10
5.4 Pulsation...................................................................................................... 11
5.5 PreventionofCavitation(liquidservice) ...................................................... 11
5.6 PreventionofExcessiveFlowrate ............................................................... 11
5.7 PreventionofSlugFlow .............................................................................. 12
5.8 KeepthePipeFilledwithProcessFluid...................................................... 12
5.9 Bypass Line ................................................................................................. 12
6. INSTALLATION ......................................................................................... 12
6.1 Installation Location ..................................................................................... 12
6.2 PhysicalOrientation .................................................................................... 12
6.3 InstallationProcedure,FixedType .............................................................. 13
6.4 Installation, Hottap Type............................................................................... 14
6.5 Lagging Work ............................................................................................... 16
6.6 Ambient Temperature .................................................................................. 17
6.7 PartiallyFilledPipe ...................................................................................... 17
6.8 WorkingStageandHoist.............................................................................. 17
6.9 HottapTypeDriveUnitRemoval ................................................................. 18
6.10HowtoChangePreamplierOrientation...................................................... 19
6.11How to Change Indicator and Totalizer Orientation ..................................... 20
7. WIRING CONNECTIONS.......................................................................... 21
7.1 WiringSpecications.................................................................................... 21
7.2 Wiring Connection........................................................................................ 21
7.3 WiringDiagram(anexample) ....................................................................... 22
8. OPERATION ............................................................................................. 23
8.1 FlushingthePipingAssembly ..................................................................... 23
8.2 OperationProcedure ................................................................................... 23

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9. BUILT-IN DISPLAY FUNCTIONS AND OPERATION ...................................... 24
9.1 DisplaySelection(totalizerequippedmodel) .................................................... 24
9.2 TotalFlowReset .......................................................................................... 24
10. RECONFIGURATION AND PARAMETER LISTS .................................... 25
10.1 ChangingtheFullScaleReadings ............................................................. 25
10.2 Simulation................................................................................................... 26
10.3 CPUReset.................................................................................................. 26
10.4 DescriptionofIndividualSwitches ............................................................. 27
10.5 PARAMETERLISTS.................................................................................... 28
11. FLOW SENSITIVITY ADJUSTMENT PROCEDURE ............................... 32
11.1 AmplierGain............................................................................................ 32
11.2 Trigger Level .............................................................................................. 32
12. PREAMPLIFIER OPERATION CHECK WITH SIMULATED
PULSE INPUT .......................................................................................... 33
12.1 TestSetup ................................................................................................. 33
12.2 FullScaleFrequencyCalculation.............................................................. 34
13. MAINTENANCE ....................................................................................... 35
13.1 DisassemblyandInspectionGuidelines .................................................... 35
13.2 DisassemblyandInspectionProcedure..................................................... 35
13.3 PreamplierInspection............................................................................... 37
14. ASSEMBLY DRAWING AND PARTS LIST, FIXED TYPE ........................ 38
15. ASSEMBLY DRAWING AND PARTS LIST, HOTTAP TYPE ................... 40
16. GENERAL SPECIFICATIONS .................................................................. 42
16.1 SensorSpecications ................................................................................ 42
16.2 TransmitterSpecications.......................................................................... 43
16.3 NominalMeterFactors............................................................................... 45
16.4 PressureLosses ......................................................................................... 46
17. OUTLINE DIMENSIONS ........................................................................... 47
17.1 EX DELTAⅡ................................................................................................ 47
17.2 FlowStraightenerandDownstreamPipe................................................... 49
18. FLAMEPROOF APPROVAL: DIMENSION OF
NON-THREADED JOINTS........................................................................ 50
19. PRODUCT CODE EXPLANATION .......................................................... 51

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CONVENTIONS
ShowninthismanualarethesignalwordsNOTE, CAUTION and WARNING, as described
intheexamplesbelow:
NOTE: Notesareseparatedfromthegeneraltexttobringtheuser’sattention
to important information.
CAUTION: Caution statements signal the user about hazards or unsafe practices
which could result in minor personal injury or product or property
damage.
WARNING: Warning statements signal the user about hazards or unsafe practices
which could result in severe personal injury or death.
This brochure gives the instruction for the proper functioning of the product, the safety
andthecompliancewithseveralCE-markingDirectives.Followtheinstructionsspecied
in this instruction manual.
OVAL will not take responsibility for any damage, injury, or form of loss caused where the
product is not installed and used as detailed in this instruction manual.

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1. BEFORE YOU BEGIN
1.1 Confirming the Specifications
(1) When received, the meter should be thoroughly inspected for indication of rough handling during
transit.
(2) Product code number and ratings are stated on themeter nameplate. Make sure that the ratings
shownconformtoyourparticularspecications.
1.2 Transit Considerations
(1) Itisdesirablethatthemeterbetransportedtotheinstallationsiteintheshippingcontainerusedfor
transit from the factory.
(2) Duringtransportation,exercisecaretoavoidimpactshockandrainwater.
1.3 Storage Considerations
(1) Themetercanbestbestoredintheshippingcontainerusedfortransitfromthefactory.
(2) Theplaceofstorageshouldmeetthefollowingrequirements:
Freefromrainandwater
Freefromvibrationandimpactshocks
Withleasttemperatureandhumidityvariation(around25°C(77°F)and65%R.H.)
(3) Ameterthathasoncebeenplacedinserviceforanylengthoftimeshouldbewashedcleantoremove
residue of the metered material completely from its inner walls before storage. Waterproofing the
wiring entrance should also be taken into consideration.
CAUTION: Unauthorized modification will invalidate the specifications.
2. OPERATING CONDITIONS
To maintain the stated high accuracy and long
service life of the meter, make sure that the operating
owrate,pressure,temperature,etc.,areheldwithin
the ratings specified. These ratings are stated on
the meter preamplier nameplate (tag). Read them
carefully before you place the meter in service.
Items Stated on the Nameplate
No. Item Description
➀Model
➁SerialNo.
➂Ratedmax.
owrate
Max.owratestatedinthe
cataloginactualowrate.
➃
Max.temperature
➄Max.pressure
➅Date of
manufacture
No. Item Description
➆Meterfactor Differs from meter to meter.
➇Totalowunits
➈Instant.owrate
full scale
➉Vortexsignal
freq. at full scale
11
Ambient temp. Max.allowableambienttemp.
12
Tag No. Powersupplyrange
•
•
•

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3. GENERAL
Inthisvortex flowmeter, apiezoelectricsensortype Deltaflowmeterprovenineveryindustrialfield
(EX DELTAⅡand EX DELTAⅡ) is combined with the data transmission technology pursuant to the H1
low-rate Fieldbus specications prescribed by the Fieldbus Foundation, enabling the operator to make
sophisticated ow measurements. It replaces the traditional 4-20mA analog one-way communications
with digital interactive communications; can acquire various information at the same time. When linked
withotherFieldbuscompatiblecontrollers,theoperatorcanbuildauser-friendlyandreliableeldnetwork
systemintheprocessautomationeld.
Theeld-provenEXDELTAⅡDiaisaliquid-serviceorientedvortexowmeterdedicatedfor“dirty”ows.
It justies its use particularly in applications where rusty components present a problem, or where the
processuidcontainslargequantitiesof foreignmatterthat tendtobuildup intheline.It substantially
reduces problems that come with other type owmeters or traditional vortex owmeters, and ensures
stableowmeteringovermanyyears.
Features
(1) Abroadowrangewithhighmeteringaccuracy.
(2) Thesensorisolatedfromtheprocessuidandsimplemeterdesignwithnomovingpartscontributes
to long life.
(3) Nolossofaccuracywithage.
(4) Awidetemperatureandpressurerange.Acceptsmostuids,includingliquids,gasesandsteam.
(5) Smallpressurelossacrossthemetertosaveenergy.
(6) Pipelineclosureisnotrequiredintheeventofanemergency.
(7) Outputbeingpulsesproportionaltoowvelocitymakestotalizationsimple.
(8) Economyisevidentwhenitcomestoowmeasurementsinlargediameterpipelines.
4. COMPONENT NAMES
RefertoFigs.4.1and4.2onthefollowingpages.
➀ Meter Body (probe): Consists of a measuring pipe and a vortex shedding body (bluff body). As the
meteredmaterialows,vonKarmanvorticesformandshedbehindthebluffbody.
➁ Sensor (vortex sensing element): Has a built-in piezoelectric sensor. All wetted parts are made of
stainlesssteelformaximumlifeexpectancy.
➂ Adapter(shaftassembly):Connectsthemeterbodywiththepreamplier.Tobeinstalledinthepipeline
withaange.Alsoservestoguardthesensoragainstdamageanddissipateheat.
➃ Preamplier:Transformschangesinelectricchargesgeneratedfromthesensorintoanoutputsignal
representingtheowrate.Consistsoftheinterfaceboard,amplierboard,isolationboard,CPUboard,
and display. Output comes in three types - unfactored pulse output, factored pulse output and analog
output.
➄ PreamplierPA65S(totalizeranddigitalindicator)
Physicalorientationofthepreamplierisadjustableinstepsof90deg.aroundthe
adapteraxis(seeSec.6.3onpage13).Thedisplaycanalsobeorientedinsteps
of90deg.withinthepreamplierhousing.
➅ SelectorMagnet:Theindicator-equippedmodelisprovidedwith aselector
magnet with which to change display modes.

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Fig.4.1ComponentNames,FixedType
➄PreamplierPA65S(Totalizer,digitalindicator)
➃Preamplier
(PA65)
FlowDirection
➂Adapter
➀MeterBody
(probe)
➁Sensor
(vortexpickup)
Probe
➅SelectorMagnet
8-digit LCD TotalizerDisplaySelectSwtichField

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➀MeterBody
(Probe)
➁Sensor
(VortexPickup)
Mounting
Nozzle
FlowDirection
Hold-down Disc
Vent Valve
Handwheel
➂Adapter
GateValve
➃Preamplier
Fig.4.2PartNames,HottapType

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5. PIPING INSTRUCTIONS
For general considerations to be observed refer to JIS Z 8766, “Flowrate Measurement Methods with
VortexFlowmeters”.
5.1 Standard Piping Conditions
It is generally required that the flow pattern of a material moving into an inferential type meter be as
uniform as possible for accurate metering. Accordingly, proper flow straightening measures must be
taken when the application engineer considers installation of a Delta meter. In applications where OVAL
straightening devices (flow straightener, Honey vane, and downstream pipe) are used, a straight pipe
sectionisnotrequiredunlessotherwisespecied.Butifyouplantosolvetheowpatternproblemwitha
straightpipesectionalone,securethelengthofastraightpipeconformingtotheISOstandardsgivenin
Table5.1below:
(1) OVAL flow straightener combined with downstream pipe (25 mm and up in nom. dia.)
D = Nom. Dia.
No. Arrangement Remarks
1 Honey vane L
8D
Flow
⇨SeeFig.5.1onpage9.
2FlowStraightener
12D
Flow
⇨Seepage49forface-to-face
dimension.
(2) Straight pipe alone without flow straightener
Tomatchthemeterdiameter,useaSch,40pipeforthestraightpipe.
 Table5.1StraightPipeLengthsRecommendedbyISO-5167 D=Nom.Dia.
No. Arrangement Remarks
1Reducer
15D
Flow
A concentric reducer is upstream
of a meter.
2 Elbow
23D
Flow
An elbow is upstream of a meter.
25D
Flow
Two elbows are horizontally
upstream of a meter.
40D
Flow
Two elbows are vertically
upstream of a meter.
3Gatevalvefullyopen
15D
Flow
A full-open gate valve is upstream
of a meter.
4Gatevalve,partially
open
50D
Flow
A partially open gate valve, a
narroworice,orsomethingthat
considerablydisturbstheow
pattern is upstream of a meter.

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(3) Space Saving Arrangement
If requiredstraight pipe space is not obtainableupstreamof the vortex flowmeter due to existing
restrictionsoninstallationlocation,theOVALHoneyVaneScombinedwithashortpipemaybeused
to avoid the space problem.
Honey Vane Outline Dimensions
Honey Vane“S” Honey Vane“L”
t
φD
L
Dimensions in millimeters
Fig.5.1
Nom.
Dia.
（mm）
φD 1
HoneyVaneS Honey Vane L
t L
200 270 36 1600
250 333 42 2000
300 378 48 2400
1
: DimensionsatJIS10K.
5.2 Pipes to be Used
Pipeshavingtheinsidediameterspeciedatthetimeyouplacedanorderforthismetershouldbeused
for upstream and downstream pipes of this meter.
5.3 Location of Pressure Gage and Thermometer Taps
Tapsforthepressuregaugeand/orthermometer,ifdesired,shouldbelocatedasillustratedinFig.5.2at
right.
●
6
Thermo-
meter Tap
Gage Tap
D = Nom. dia.
Meter Body
Flow
Direction
4 to 6.5D
2 to 4.5D
Fig.5.2

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5.4 Pulsation
Compressors, Roots blowers and other pulsation pressure generating sources could adversely affect
meterperformance.Minimizepulsatingpressuresbyreferringtothefollowingformula:
N <2.25 ρV2(mmH2O)
 whereN :Pulsationpressure(mmH2O)
ρ :Density(kg/m3)
  V :Minimumvelocity(m/s)
Ifpulsationpressureisexcessive,thefollowingmeasuresshouldbetakenintoconsideration:
➀Locate the source of pulsation downstream of the meter or locate it as far from the meter as possible.
➁ Provideapulsationattenuator,suchasachamberorpulsationsnapper.
➂ Shutoffvalvesupstreamanddownstreamofthemeterwhenuidowisinterrupted(asaprecaution
againsterraticsignalgenerationatzeroow).
5.5 Prevention of Cavitation (liquid service)
To prevent cavitation, line pressure should be maintained above the level calculated by the following
formula:
  P≧2.60ΔP+1.25P0(MPaabs.)
where ΔP:Pressureloss(MPa)=2.4
・
γ/2g
・
V2× 10-4
  P0:Steampressureofliquid(MPaabs.)
γ :Specicweight(kg/m3)
  V :Flowrate(m/s)
  g:Accelerationofgravity(9.8/s2)
5.6 Prevention of Excessive Flowrate
Toensurelongmeterlife,transientowratesshould
beheldbelow1.6timesthemeter’smaximum
rating.Shownbelowaretypicalexamplesin
steammeasurementwhereexcessiveowis often
encountered:
Examples where meter’s maximum rating is
exceeded on a momentarily basis
In steam measurement
When P1 ≫P2,quicklyopeningthevalvewill
result in a fluid flow at a rate dependent on the line
resistance(mainlyvalveportpositionin“A”ormeter
resistance in “B”). The resultant rate of incoming
owisthesumofdownstreampipelinevolumeand
consumption, but if pressure differential across the
valveisgreat,theuidvelocitywilleasilyreachthesonic
speed,momentarilywellinexcessofmeter’s
maximumrating. (Suchphenomenonisoften
experiencedatsystemstartuporinbatchoperation.)
Fig.5.3
P1 P2
P1 P2
Valve
Valve
Meter
Meter
Gauge
Gauge
Flow
Direction
Flow
Direction
“Ｂ”
“Ａ”

D-585-1-E
12
5.7 Prevention of Slug Flow
Thismetercanmeasurebothgasesandliquids,butslugows(wheregasesexistintheprocessliquid)
will produce a loss of metering accuracy.
5.8 Keep the Pipe Filled with Process Fluid
When making a liquid measurement, ensure that the piping remains full of the process liquid. Installation
inlocationswhereitisdifculttokeepthepipinglledwiththeprocessliquid,orwherebubblestendto
collect should be avoided.
5.9 Bypass Line
Formaintenanceandservicingpurposes,itisa
good practice to provide a bypass line. Valves
upstream and downstream of the meter should be
ofadesignthatwillnotdisturbuidowpattern,
suchasballvalves(fullboretype),inthis
arrangement(seeFig.5.4).
For general considerations to be observed, refer
to JIS Z 8766, “Flowrate Measurement Methods
with Vortex Flowmeters”.
6. INSTALLATION
WARNING: Whenever you open the preamplifier and/or terminal covers for maintenance,
installation and/or electrical adjustment, be sure to de-energize before your work
and not to work in hazardous atmospheres.
6.1 Installation Location
Selectalocationwithambienttemperatures–10to+80°C(14to176°F),or–10to+60°C(14to140°F)for
metersconguredtoexplosionproofrating. Installationinsuchlocationsas describedbelowshouldbe
avoided:
➀hardly accessible for maintenance and servicing
➁ temperaturechangeand/orvibrationisexcessive
➂possible immersion in water
➃corrosive atmosphere
➄ untforthemeter’sexplosionproofconguration
6.2 Physical Orientation
Thismetermaybeinstalledeitheronahorizontalorverticalrun.Avoid,however,suchphysicalorientationas:
➀Inconvenient for inspection and maintenance ➁ Rainwatermayenterfromwiringentry
(ifinstalledoutdoors)
Fig.6.1InstalledUpsideDown
Top
Bottom
Fig.6.2WiringEntryPointedUpward
Top
Bottom
CAUTION: The hottap type requires installation in a horizontal pipeline.
Fig.5.4
MeterUpstream Valve Downstream Valve
Valve in Bypass Line
Flow
Direction

D-585-1-E
13
6.3 Installation Procedure, Fixed Type
Install the meter body in the following manner:
The piping may run either horizontal or vertical. Install the meter in a position illustrated in the sketches
below.
6.3.1 Typical Orientation
Fig.6.3
Horizontal Line Vertical Line
Preamplier
PreampFitting
Screw
Adaptor
FlowDirection: Right →Left and Left →Right
Preamplier
FlowDirection: Top →Bottom and Bottom →Top
6.3.2 Installation Procedure
Install the meter in the following manner:
➀The meter probe body is provided with blind
caps. Be sure to remove them before you install.
➁Determine the location by the flow direction
arrow mark and the center mark (V-groove) on
theshaftassembly(102).
➂Be sure to install the gasket.
IMPORTANT:
(1) Do not forget to install the gasket in place and
tighten bolts.
(2) A leak test should be conducted before
commencing operation. Fig.6.4
Ｖ
-GrooveMark
（Center mark）
Bolt
Gasket
Pipe
ProbeBody

D-585-1-E
14
6.4 Installation, Hottap Type
6.4.1 Part Names
Fig.6.5
Drive
Unit
Handwheel(Probegoesupordownasyouturnit
inorout.)
Stud
FlowDirection
Gaskets
Cover
ShortPipe
(Withventvalve)
MatchMarkB(Indicatestheprobeisatthefully
raisedposition.)
MatchMarkA(Indicatestheprobeisatthefully
insertedposition.)
Guide
PackingRetainer
GlandPacking
ScrewAxis
GateValve
Retaining
Hold-DownDisc(Preventsnoisescausedbyline
oscillation.)
MountingNozzle
Caution:Careshouldbetaken
in physical orientation.
Probe(Flowratesensingassembly,consistsof2"
body,bluffbodyandsensor.)

D-585-1-E
15
6.4.2 Installation Procedure
 (SeeassemblydrawinginFig.6.5onpage14andFig.15.1onpage40.)
Byturninginoroutthehandwheel,theprobeofthisowmetergoesdownorupand,withouttheneedof
interrupting the line, it can be drawn out. When the meter is placed in service for measurement, the hold-
downdiscissopositionedastocomeincontactwiththeretainingring(theguideisatmatchmark“A”
onthestud).
Duringmaintenanceorinspection,allowtheprobetobehousedcompletelyintheshortpipe(theguideis
atmatchmark“B”onthestud)andremovethemeterfromabovethegatevalve.
Whenremoving orinstallingit,exercisecaretominimizethepossibilityofunexpectedtrouble by
observingthefollowinginstructions:
(1) Installthehold-downdiscintherightphysicalorientation.
(2) Astheprobepassesthroughtheopeninginthegatevalve,makesurethatthegatevalveisinitsfully
opened position when the probe is inserted, and that the probe is hoisted completely above the gate
valve when the gate valve is closed before attempting to remove or install.
(3) Be aware of the internal pressure when you remove the flowmeter. (Allow the pressure to escape
throughtheventvalvebeforeattemptingtoremovethemeter.)
(4) Directionsofhandwheelrotation
  Clockwiserotation(viewedfromtop)→Probedescends.
  Counterclockwiserotation(viewedfromtop)→Probeascends.
Installation Instructions
(1) Installthehold-downdiscbetweenthemounting
nozzle(mountingange)andgatevalve.
Useextracaretoinstallthehold-downdiscin
the right physical orientation at this time.
Ensure that the arrow mark on the side of
hold-down disc conforms to the actual flow
direction and that the arrow mark is on the left
hand side as viewed from the flow direction
(upstreamside).
Install a gasket on top and bottom of the hold-
down disc.
(2) Installthemeter.
Removeprotectivecapsprovidedonthe
sides.
Ensure that the arrow mark on the cover
conforms to the flow direction.
Ensure that the flanges of short pipe, gate
valve and hold-down disc are flush and in line
withtheperipheryandthecentermark(V-groove).
(3) With the gate valve fully open, insert the probe until the retaining ring comes into contact with the
hold-downdiscbyturningthehandwheel.Theguideshouldbeatthematchmark(V-groove)onthe
stud at this time.
Ensure that the vent valve is fully closed and that the fitting bolts are tight.
In the event a leak persists through the gland packing, retighten the bolts holding the packing
retainer.
•
•
•
•
•
•
•
Fig.6.6
Flow
Directin
Hold-down Disc
TaperedFaceUp
ArrowMark

D-585-1-E
16
Removal Procedure
(1) Disconnectwiringofthepreamplier.
(2) Byturningthehandwheel,retracttheprobe.
Retractituntiltheguidearrivesatmatchmark“B”onthestud.
(3) Conrmingthattheprobehasbeenretractedcompletely,fullyshutoffthegatevalve.
(4) Takingprecautionsagainstinternalpressure,carefullyopentheventvalve,allowingtheinternal
pressure to escape.
(5) Dismounttheowmeterfromthegatevalve.
6.4.3 Preamplifier Orientation
Asviewedfromthedirectionofflow(upstream
side),thepreamplifiertypicallyinstallsinclinedto
the left. The cable entrance points downward. In
the standard installation, the display of a display-
equippedpreamplier(PA65S)facesinthedirection
ofoutow(downstreamside).
6.5 Lagging Work
If heat insulation is considered for the piping,
simpliedlagging(withoutmortarnish)issuggested
for the area where the meter is installed to facilitate
disassemblyandinspection.Suchconsideration
will simplify meter connecting bolt removal without
the need of breaking the coat of lagging material at
servicing.
Fig.6.7
Preamplier
Wiring Entry
Display
Fig.6.8
PreampFitting
Screw Adaptor
Preamplier
FlangeConnecting
Bolt
PipelineLagging
SimpleLaggingWork
（Splitlaggingdesign
desirable for ease of
maintenance）
Lagging Work

D-585-1-E
17
6.6 Ambient Temperature
GiveninFig.6.9istheallowableprocessfluid
temperature relative to the ambient temperature.
Ensure that the ambient temperature is held within
the rating.
If there is a possibility that the ambient temperature
exceedstheallowablelimit,thefollowingmeasures
should be taken into consideration.
Avoidexposuretothedirectraysofthesun.
Separatefromthepipingandequipmentof
elevated temperatures or provide a heat shield.
Thermallyinsulatethepreamplifier(inalow
temperatureenvironment).
6.7 Partially Filled Pipe
Whenmaking measurementof a liquid, make surethat thepiping remainsfull of uid and contains no
trappedairorgases.Inapplicationswheretheexistingpipingconditionspotentiallycauseapartiallylled
pipeline, a purge valve should be provided.
6.8 Working Stage and Hoist
To facilitate hottap type DELTA meter inspection and maintenance, we recommend that a working stage
and a hoisting device are provided.
•
•
•
Fig.6.9AmbientTemperatureRange
AmbientTemperature(°C)
FluidTemperature(°C)
NonexplosionproofRated
ExplosionproofRated
Allowable
Range
300
250200
150100
500-30
125
-40
-20
0
20
40
60
80

D-585-1-E
18
6.9 Hottap Type Drive Unit Removal
The drive unit (retractable assembly including the handwheel and screw shaft) can be separated. It is
benecialinapplicationswherelinevibrationisgreat,orwhereasingledriveunitissharedby multiple
owmeters.
Drive unit removal procedure
➀ Installingtheshaftttingbolts(Fig.A)
SecuretheadaptorAtothecoverwithshaftttingboltsandhexnutsA.(Thispreventstheshaftfrom
beingforcedupwardunderlinepressure.)
➁ Separatingtheshaftfromitsconnection(Fig.B)
Takingofftwohexnuts,turnthehandwheeltoextracttheconnectingstudsfromtheadaptorA.
➂ Removingthedriveunit(Fig.C)
Takingoffthreehexbolts,removethedriveunit.Exercisecarenottobumpagainstthepreamplieror
other components.
Drive unit installation is the reverse of the removal instructions.
Fig.6.10
Option
Fig.A Fig.B Fig.C
Retract
Handwheel
ScrewAxis
No. PartName Q’ty Remarks
309 Cover 1
311 Adaptor A 1
340 ShaftRetainingBolt 2M12
341 HexNutA 2M12
411 ConnectingStud 2
414 HexBolt 3M16
415 HexNut 2M16

D-585-1-E
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6.10 How to Change Preamplifier Orientation
The preamplifier can be oriented to the desired
directionin90°stepsasshowninFig.6.11.
NOTE:Tochangetheorientation,hexkey(JIS
B 4648), nominal size 4, is required. The
preamplier can be rotated by loosening
its four hex socked head screws, but be
sure to disconnect sensor leads before
attempting to rotate it.
CAUTION:Turning the preamplifier with
sensor leads in place may damage
the sensor.
WARNING: Be sure to remove power before
yo ur wor k a nd n o t to wor k i n
hazardous atmospheres.
Procedure
RefertoSections14and15,“ASSEEMBLYDRAWING
ANDPARTSLIST”onpages38through41.
➀Turn off power.
➁ Removetheterminalboxcover(Fig.6.12).
NOTE:Ifthepreamplifierisofexplosionproof,
disengage the latch ( ) before removing
the cover.
➂ Separatetheshieldstrip(Fig.6.13).
➃Disconnect sensor leads from the terminal block.
➄ Loosen a total of four hex socket head screws
securingthepreamplier’sneck(Fig.6.14).
➅Turn the preamplifier to the desired direction,
exercisingcarenottoforcethesensorleads.
➆ When the preamplier orientation has been set,
assemble in the reverse order of removal.
Fig.6.11
HexSocketHeadScrew
90°
Cover
Fig.6.12
Fig.6.13
ShieldStrip
Fig.6.14
SensorLeads
HexSocketHead
Screw
Turn

D-585-1-E
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6.11 How to Change Indicator and Totalizer Orientation
If the preamplifier is equipped with local display
(indicatorandtotalizer),thedisplayassemblycanbe
rotated to the desired direction in 90°steps through
360°.Bychangingtheangleofdisplayassembly
(internalassembly),theindicatorortotalizerappears
formaximumreadabilityonaverticalrunora
horizontal run.
How to Change Display Angle
RefertoSec.13.2“PreamplierInspection”onpage
37andSec.15,“EXPLODEDVIEWANDPARTS
LIST”onpage40.
WARNING: In the case of externally powered
model, be sure to de-enegize
before you work.
➀ Intheexplosionproofmodel,removethelatch
securingthewindowcover(Fig.6.16).
➁ Removethewindowcover(Fig.6.16).
➂Loosen four screws holding the display assembly
and remove the display assembly from its
connector(Fig.6.17).
NOTE: The procedure above applies to the
separate-mountedtypepreamplier.
➃Orient the display assembly to the desired angle,
install it as far into the connector as it will go
andsecureitwithfourscrews(adjustablein90°
steps).
NOTE:Makesureitispushedinasfarasitwill
go.
➄Install the window cover in place.
➅ Explosionproofmodelrequirespositive
installation of the latch assembly.
CAUTION: The cover must be screwed in as
far as it will go.
Fig.6.15
HorizontalRun VerticalRun
LatchWindow Cover
Fig.6.16
Fig.6.17
Display Assembly
Rotatabiein90°
step
Connector