YOKOGAWA vigilantplant DM8 User manual

Brand: YOKOGAWA

Model: vigilantplant DM8

Type: User manual

User’s

Manual

Model DM8

Vibration Type Density Meter

IM 12T03A01-02E

5th Edition

IM 12T03A01-02E

u Introduction

This manual describes the specications, installation, operation, maintenance, and

troubleshooting for the Model DM8 Vibration Type Density Meter. To use this manual

correctly, read this manual thoroughly.

This manual is applied to the following product.

Detector: VD6D (Style B), VD6DF (Style B), VD6DS (Style B)

Converter: DM8C (Style C)

Special Cable: DM8W (Style A)

For the Model VD6SM Sampling System, refer to IM 12T3S1-01E.

n Notes on Handling User’s Manuals

• Pleasehandovertheuser’smanualstoyourenduserssothattheycankeeptheuser’s

manuals on hand for convenient reference.

• Pleasereadtheinformationthoroughlybeforeusingtheproduct.

• Thepurposeoftheseuser’smanualsisnottowarrantthattheproductiswellsuitedtoany

particular purpose but rather to describe the functional details of the product.

• Nopartoftheuser’smanualsmaybetransferredorreproducedwithoutpriorwritten

consent from YOKOGAWA.

• YOKOGAWAreservestherighttomakeimprovementsintheuser’smanualsandproductat

any time, without notice or obligation.

• Ifyouhaveanyquestions,oryoundmistakesoromissionsintheuser’smanuals,please

contact our sales representative or your local distributor.

MediaNo.IM12T03A01-02E 5thEdition:Dec.2015(YK)

AllRightsReservedCopyright©2006,YokogawaElectricCorporation

5th Edition : Dec. 11, 2015-00

IM 12T03A01-02E

u Safety Precautions

n Safety, Protection, and Modication of the Product

• Inordertoprotectthesystemcontrolledbytheproductandtheproductitselfandensure

safeoperation,observethesafetyprecautionsdescribedinthisuser’smanual.Weassume

no liability for safety if users fail to observe these instructions when operating the product.

• Ifthisinstrumentisusedinamannernotspeciedinthisuser’smanual,theprotection

provided by this instrument may be impaired.

• Ifanyprotectionorsafetycircuitisrequiredforthesystemcontrolledbytheproductorfor

the product itself, prepare it separately.

• BesuretousethesparepartsapprovedbyYokogawaElectricCorporation(hereafter

simply referred to as YOKOGAWA) when replacing parts or consumables.

• Modicationoftheproductisstrictlyprohibited.

• Thefollowingsafetysymbolsareusedontheproductaswellasinthismanual.

WARNING

This symbol indicates that an operator must follow the instructions laid out in this manual in order

toavoidtherisks,forthehumanbody,ofinjury,electricshock,orfatalities.Themanualdescribes

whatspecialcaretheoperatormusttaketoavoidsuchrisks.

CAUTION

This symbol indicates that the operator must refer to the instructions in this manual in order to

prevent the instrument (hardware) or software from being damaged, or a system failure from

occurring.

CAUTION

This symbol gives information essential for understanding the operations and functions.

NOTE

This symbol indicates information that complements the present topic.

n Warning and Disclaimer

The product is provided on an “as is” basis. YOKOGAWA shall have neither liability nor

responsibility to any person or entity with respect to any direct or indirect loss or damage arising

from using the product or any defect of the product that YOKOGAWA can not predict in advance.

5th Edition : Dec. 11, 2015-00

iii

IM 12T03A01-02E

u After-sales Warranty

n Do not modify the product.

n During the warranty period, for repair under warranty consult the local sales

representative or service ofce. Yokogawa will replace or repair any damaged

parts. Before consulting for repair under warranty, provide us with the model

name and serial number and a description of the problem. Any diagrams or

data explaining the problem would also be appreciated.

• Ifwereplacetheproductwithanewone,wewon’tprovideyouwitharepairreport.

• Yokogawawarrantstheproductfortheperiodstatedinthepre-purchasequotation

Yokogawashallconductdenedwarrantyservicebasedonitsstandard.Whenthe

customer site is located outside of the service area, a fee for dispatching the maintenance

engineer will be charged to the customer.

n In the following cases, customer will be charged repair fee regardless of

warranty period.

• Failureofcomponentswhichareoutofscopeofwarrantystatedininstructionmanual.

• Failurecausedbyusageofsoftware,hardwareorauxiliaryequipment,whichYokogawa

Electric did not supply.

• Failureduetoimproperorinsufcientmaintenancebyuser.

• Failureduetomodication,misuseoroutside-of-specicationsoperationwhichYokogawa

does not authorize.

• Failureduetopowersupply(voltage,frequency)beingoutsidespecicationsorabnormal.

• Failurecausedbyanyusageoutofscopeofrecommendedusage.

• Anydamagefromre,earthquake,stormsandoods,lightning,disturbances,riots,warfare,

radiation and other natural changes.

n Yokogawa does not warrant conformance with the specic application at the

user site. Yokogawa will not bear direct/indirect responsibility for damage due

to a specic application.

n Yokogawa Electric will not bear responsibility when the user congures the

product into systems or resells the product.

n Maintenance service and supplying repair parts will be covered for ve years

after the production ends. For repair for this product, please contact the

nearest sales ofce described in this instruction manual.

5th Edition : Dec. 11, 2015-00

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IM 12T03A01-02E

Model DM8

Vibration Type Density Meter

CONTENTS

IM 12T03A01-02E 5th Edition

u Introduction ....................................................................................................i

u Safety Precautions .......................................................................................ii

u After-sales Warranty ...................................................................................iii

1. GENERAL .................................................................................................. 1-1

1.1 Standard Specications ................................................................................... 1-1

1.1.1 GeneralSpecications ....................................................................... 1-1

1.1.2 Detector .............................................................................................. 1-1

1.1.3 Converter Model DM8C ..................................................................... 1-2

1.1.4 Special Cable Model DM8W .............................................................. 1-4

1.1.5 Standard Accessories ........................................................................ 1-5

1.2 Models and Sufx Codes ................................................................................. 1-5

1.2.1 GeneralPurposeDetector ................................................................. 1-5

1.2.2 Flameproof Detector .......................................................................... 1-5

1.2.3 Sanitary Use Detector ........................................................................ 1-5

1.2.4 Converter ........................................................................................... 1-6

1.2.5 Special Cable ..................................................................................... 1-6

1.3 External Dimensions ........................................................................................ 1-7

1.3.1 Detector .............................................................................................. 1-7

1.3.2 Converter Model DM8C ..................................................................... 1-9

1.3.3 Special Cable Model DM8W ............................................................ 1-10

1.4 Cautions in Handling Flameproof, Explosion-proof Instruments ............. 1-11

1.4.1 OutlineofExplosion-proofInstruments ........................................... 1-11

1.4.2 LabelingtheExplosion-proofSpecications .................................... 1-11

1.4.3 Installation Area and Ambient Conditions ........................................ 1-12

1.4.4 ExternalWiringWork ....................................................................... 1-12

1.4.5 MaintenanceProcedure ..................................................................1-12

1.4.6 Repairs ............................................................................................. 1-12

2. PRINCIPLES OF OPERATION ................................................................. 2-1

2.1 Measuring Principle .......................................................................................... 2-1

2.1.1 Density Detector ................................................................................ 2-1

2.1.2 Density Converter .............................................................................. 2-1

2.2 Main Components ............................................................................................. 2-2

2.2.1 Density Detector ................................................................................ 2-2

2.2.2 Density Converter .............................................................................. 2-3

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IM 12T03A01-02E

3. INSTALLATION, PIPING AND WIRING .................................................... 3-1

3.1 Installation of Density Detector ....................................................................... 3-1

3.1.1 Mounting Density Detector ................................................................ 3-1

3.1.2 Sampling Unit for Vibration Type Density Meter ................................ 3-3

3.2 Installation of Density Converter .................................................................... 3-6

3.2.1 Installation Area.................................................................................. 3-6

3.2.2 Installation of Density Converter ........................................................ 3-6

3.3 Piping ................................................................................................................. 3-9

3.3.1 SampleLiquidConduit ....................................................................... 3-9

3.3.2 AirPipingforMaintenance ............................................................... 3-10

3.3.3 SteamPiping .................................................................................... 3-11

3.3.4 PipingforAirPurge .......................................................................... 3-11

3.4 Wiring ...............................................................................................................3-12

3.4.1 Wiring between Detector and Converter ......................................... 3-13

3.4.2 Wiring for Analog Output Signal ....................................................... 3-14

3.4.3 Wiring for Digital Output Signal ........................................................ 3-14

3.4.4 Wiring for Abnormal Status Contact Output ..................................... 3-15

3.4.5 WiringforPowerSupply .................................................................. 3-15

3.4.6 Wiring for Grounding ........................................................................ 3-15

4. OPERATION .............................................................................................. 4-1

4.1 Component Names and Function ................................................................... 4-1

4.1.1 Density Detector ................................................................................ 4-1

4.1.2 Density Converter .............................................................................. 4-2

4.2 Operation ........................................................................................................... 4-3

4.2.1 Operation Mode ................................................................................. 4-3

4.3 Preparation for Measurement .......................................................................... 4-7

4.3.1 CheckforPiping ................................................................................. 4-7

4.3.2 CheckforWiring.................................................................................4-7

4.3.3 MeasuringLiquidFlow ....................................................................... 4-7

4.3.4 TurningONthePower ....................................................................... 4-8

4.3.5 Data Input ........................................................................................... 4-8

4.3.6 PressureCompensation .................................................................... 4-9

4.4 Calibration ....................................................................................................... 4-10

4.4.1 Calibration with Standard Solution .................................................. 4-10

4.4.2 Calibration with a Sample ................................................................ 4-11

4.4.3 Calibration Error ............................................................................... 4-12

4.5 Operation ......................................................................................................... 4-12

4.5.1 OperationProcedure ....................................................................... 4-12

4.5.2 CheckofMeasuredDensityValue................................................... 4-12

4.5.3 Shutdown ......................................................................................... 4-12

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IM 12T03A01-02E

5. MAINTENANCE ......................................................................................... 5-1

5.1 Daily Inspection/Maintenance ......................................................................... 5-1

5.1.1 Cleaning the Vibrator in the Detector ................................................. 5-1

5.1.2 ExchangeofDesiccantintheDetector ............................................. 5-1

5.2 Troubleshooting ................................................................................................ 5-2

5.2.1 CheckingtheVibrators ....................................................................... 5-2

5.2.2 CheckingtheRTD .............................................................................. 5-2

5.2.3 CheckingtheOscillationAmplier ..................................................... 5-3

Customer Maintenance Parts List .......................................... CMPL 12T3E1-01E

Customer Maintenance Parts List .......................................... CMPL 12T3H1-01E

Revision Information ...............................................................................................i

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<1. GENERAL>

1-1

IM 12T03A01-02E

1. GENERAL

Densityisoneofthefundamentalphysicalquantitiesrequiredwhenthepropertyorcomposition

ofaliquidsampleisbeingdeterminedinindustrialprocesses.Especially,densitymeasurement

ofasampleliquidisindispensableinmanyindustriessuchaselectricmanufactures,chemical

industries,oilreneriesandfood-relatedapplications.

The Model DM8 Vibration Type Density Meter is a higher reliable meter full of operation and

maintenance functions. The meter consists of a detector and a converter. The detector has a

vibrator and an RTD (resistance temperature detector), and outputs detected density signal

(frequency)andtemperaturesignal(voltage)totheconverter.Theconverterisequippedwitha

microprocessortoconvertthefrequencysignalsfromthedetectorintodensityvaluesanddisplay

them. It also calculates the density at the reference temperature according to these signals and

digitally displays them. Moreover, the converter outputs digital transmission signals besides

analog transmission signals and is further provided with a variety of functions such as one-touch

calibration, self-diagnosis.

1.1 Standard Specications

1.1.1 General Specications

Measurementobject: Liquiddensity

Measurement principle: Vibration density measurement

Measurement range:

Density: 0.5 to 2.0 g/cm

Temperature: -10 to 100°C

DistancebetweenDetectorandConverter: Upto2km

Powersupply: 90to132VACor180to264VAC,50/60Hz

Powerconsumption: 20VA

n Characteristics

(overall characteristics after combing the detector and the converter)

Repeatability: 5x10

-4

g/cm

(for digital output)

1 % of span (for analog output)

Linearity: ±0.5 % of span (when span is 0.2 g/cm

or less)

±1 % of span (when span is more than 0.2 g/cm

)

Temperature characteristics: ±0.5 % of span/±10°C (Compensating error for changes in the

    measuringliquidtemperatureanddetectortemperature)

Flow characteristics: ±0.1% of span in the 0 to 5 L/min range

Pressurecharacteristics: ±0.0005g/cm

/±98kPachange

Viscosityerror: ±0.1%ofspaninthe0to1500cPrange

1.1.2 Detector

(1) General Purpose Detector Model VD6D

Detectorconstruction: Non-explosionprotection,rain-proofconstruction

Case material: Cast Aluminum alloy

Casecoating: Epoxyresin,bakednish

Casecolor: Jadegreen(equivalenttoMunsell7.5BG4/1.5)

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<1. GENERAL>

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IM 12T03A01-02E

Wetted part materials:

Base: 316 SS

 Vibrator: 316SSorNi(AuBrazing:BAu·4)

Measuringliquidtemperature: -10to100°C

Measuringliquidpressure: 2MPaGorless

Maximumpressure: 4.9MPaG

Steam tracing: Available

Processconnection: Rc1/4

Electrical connection: G3/4

Mounting: JIS 50A (2-inch) pipe mounting

Ambient temperature: -10 to 50°C

Weight: Approx.12kg

(2) Flameproof (Explosionproof) Detector Model VD6DF

Detector construction:

TIIS; d2G3 or

FM; Class I, Division 1, Groups C and D, Flameproof construction

Processconnection: Rc1/4or1/4NPTfemale(onlyforVD6DF-*B/FM)

Electricalconnection: G3/4or3/4NPSMfemale(onlyforVD6DF-*B/FM)

Specicationsarethesameasforthe(1)GeneralPurposeDetectorexceptfortheabove

construction.

(3) Sanitary Use Detector Model VD6DS

Processconnection: SpecialjointforconnectiontoJIS6Apipe(withingasket)

Wetted part materials: Added to the standard model

 Gasket: Fluororesin(PTFE)

O-Ring: Fluoro rubber (FKM)

Streamtracing: Notavailable

Specicationsarethesameasforthe(1)GeneralPurposeDetectorexceptfortheabovetwoitems.

Temperature detector protecting tubes are detachable.

(Note):Thesedetectorscannotbeusedwithhighlycorrosiveliquidsandsolutionslikelytosticktosensors.Ifitisdesiredtobeapplied

tosolutionscontainingslurryorsludge,consultwithYOKOGAWA.FormeasuringNaOHsolutions,usesensorswithanickel

vibrator.

1.1.3 Converter Model DM8C

Display: Digitaldisplay,vedigitsLED

Display contents:

Density (g/cm

) after conversion to reference temperature (center temperature)

Density (g/cm

) at the measuring temperature

 Measuringliquidtemperature(°C)

 Setdensityvalueforthecalibrationliquid(g/cm

) (displayed on call)

emperaturecoefcientsetvalueforthecalibrationliquid(x10

-5

g/cm

/°C) (displayed on call)

Output signal set value (%) (displayed on call)

Setting for output range low limit (g/cm

) (displayed on call)

Setting for output range high limit (g/cm

) (displayed on call)

Reference temperature (center temperature) set value (°C) (displayed on call)

Temperaturecoefcientsetvalueforthemeasuringliquid(x10

-5

g/cm

/°C) (displayed on call)

Fault contents display

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<1. GENERAL>

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IM 12T03A01-02E

Output signal:

 Analogoutput: 4to20mADC(loadresistance550Ωorless),and0to1VDC

   (loadresistance250kΩormore),isolatedoutput.

Density (g/cm

) after conversion to the reference temperature

Digital output: RS-232C

(1) Communicationspecications

• Asynchronoussystem

 Startbit;1bit,Stopbit;2bit,Parity;none

• Baudrate;1200bps

• Dataformat;ASCII,Datalength;8bit

• Wiringsystem;Two-wiresystem(outputonly)

(2) Output signal

• Transmittingcontents

Measured data; Density (g/cm

) after conversion to the reference temperature, density (g/

)atthemeasuredtemperature,measuredliquidtemperature(°C)

 Calibrationstate;calibrationstart,errorNo.,calibrationend

 Failurealarm;errorNo.

• Signallevel

 Outputvoltage;ON;6±1V,OFF;-6±1V

 Outputimpedance;300Ω

• Outputformat

Measured data

space space

# * . * * * * _ * . * * * * _ * * * . * C

(Note):Dataareoutputintheorderofdensity(dataconvertedintothatatareferencetemperature),density(atmeasuringtemperature),

andmeasuringliquidtemperature.Holddata(dataimmediatelybeforeenteringthemode)isoutputduringthetimeofcalibration

ormaintenancemode.However,holdingisreleasedimmediatelyaftercalibrationormaintenancemode.

Calibration status

space

# CALIBRATION _ START C

(Note):Nothingisoutputduringcalibration.However,whenaparametererroroccurs,outputbecomesasfollows.

# ERROR - *C

(*: 5 or 6)

space

# CALIBRATION _ END C

(Note):IfthefunctionNo.keyispressedduringcalibration,calibrationiscanceled,andtheoutputbecomesasfollows.

space

# CALIBRATION _ CANCEL C

Fail alarm

space

# ERROR - * _ ERROR - * C

(Note):Whenmultipleerrorsoccur,eacherrorNo.fortherespectiveerrorsisoutput.

space

Example: # ERROR - 1 _ ERROR - 3 C

5th Edition : Dec. 11, 2015-00

<1. GENERAL>

1-4

IM 12T03A01-02E

Output signal span: 0.05 to 0.5 g/cm

settable

Reference temperature set range: 0 to 100°C (in increments or decrements of 1°C)

Contact output on failure: One point. Contact closed on failure or power failure. Contact open when normal.

 Permissiblevoltage: 220VDC,250VAC

 Permissiblecurrent: 2A(resistiveload)

 Permissiblecontactpower: 60W

Fault detecting contents: Detector failure and converter failure

Failure output:

Analog signal: Falls down to about -10 % of the output signal span

Digital signal: Error message outputs

Outputsignalhold: HoldsintheCAL.orMaintenancemode.

Settablerangefortemperaturecoefcient: 0to0.002g/cm

/°C

Calibrationprocedure: One-touchcalibrationbystrongcalibrationliquiddensity(one-pointcalibration)

Ambient temperature: -10 to 55°C

Powersupply: 90to132VACor180to264VAC,50/60Hz

Case construction: Dust and rain proof construction

EMC: Korea Electromagnetic Conformity Standard Class A

Coating color:

 Door: EquivalenttoMunsell2.8GY6.4/0.9

 Case: EquivalenttoMunsell2.0GY3.1/0.5

Coatingnish: Bakednishepoxyresin

Mounting: To panel, wall or 2-inch pipe

Airpurgeconnector: Rc1/8,Rc1/4,or1/4NPTfemaleisalsooptionallyavailable

Electrical connection: Five holes, 27 mm dia.

   AttachedwithfourplasticwaterproofplugsequivalenttoJISA15,and

   oneplasticwaterproofplugequivalenttoJISA20.

Weight: Approx.7.0kg

1.1.4 Special Cable Model DM8W

Type:  Six-conductordoubleshieldcable

Insulator: Polyethylene

Sheath: Polyvinylchloride

Insulationresistance: 1000MΩ/km

Conductorresistance: 15.31Ω/km

Finished O.D.: 15.8 mm

Weight: Approx.0.3kg/m

5th Edition : Dec. 11, 2015-00

한국 전자파적합성 기준

A급 기기　(업무용 방송통신기자재)

　이 기기는 업무용(A급) 전자파적합기기로서 판매자 또는

사용자는 이 점을 주의하시기 바라며, 가정외의 지역에서

사용하는 것을 목적으로 합니다.

<1. GENERAL>

1-5

IM 12T03A01-02E

1.1.5 Standard Accessories

Detector (VD6)

Syringe(forinjectingstandardsolutionorsolvent) 1 pc.

Brush (for cleaning the detector) 1 pc.

Allenwrenchforterminalbox 1 pc.

Allenwrenchforlockingthecover 1 pc.

O-Ring 1 bag

Silica gel 2packs

Converter (DM8C)

Fuse for the converter (3A) 1 pc.

Ferrite cores *1

2 pcs.

Cable straps *1

4 pcs.

*1 : For /KC

1.2 Models and Sufx Codes

1.2.1 General Purpose Detector

Model Sufx Code Option Code Description

VD6D ••••••••••••••••••••• •••••••••••••••••• GeneralPurposeLiquidDensityDetector

Vibrator material -S3

-N1

••••••••••••••••••

316 SS

— *B •••••••••••••••••• Style B

1.2.2 Flameproof Detector

Model Sufx Code Option Code Description

VD6DF ••••••••••••••••••••• •••••••••••••••••• FlameproofLiquidDensityDetector

Vibrator material -S3

-N1

••••••••••••••••••

316 SS

— *B •••••••••••••••••• Style B

(Option) /FM NECClassI,Division1,GroupCandD,

explosion-proof

1.2.3 Sanitary Use Detector

Model Sufx Code Option Code Description

VD6DS ••••••••••••••••••••• •••••••••••••••••• SanitaryUseLiquidDensityDetector

Vibrator material -S3 •••••••••••••••••• 316 SS

— *B •••••••••••••••••• Style B

5th Edition : Dec. 11, 2015-00

<1. GENERAL>

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IM 12T03A01-02E

1.2.4 Converter

Model Sufx Code Option Code Description

DM8C ••••••••••••••••••••• •••••••••••••••••• VibrationTypeLiquidDensityConverter

Powersupply -A1

-A2

••••••••••••••••••

90to132VAC,50/60Hz

180to264VAC,50/60Hz

— *D •••••••••••••••••• Style D

(Option)

Air purge connector

/AP1

/AP2

/KC

Rc1/4

1/4NPTfemale

for Korea

*1: Be sure to select this if you want to use the converter in Korea.

1.2.5 Special Cable

Model Sufx Code Option Code Description

DM8W ••••••••••••••••••••• •••••••••••••••••• SpecialCableforLiquidDensityMeter

Cable length

-L

•••••••••••••••••• Length (unit: m)

— *A •••••••••••••••••• Style A

(Note):Enterthecablelengthin“-L in m.”

 [Example] L0050for50m

L0100 for 100 m

   L2000for2km

5th Edition : Dec. 11, 2015-00

<1. GENERAL>

1-7

IM 12T03A01-02E

1.3 External Dimensions

1.3.1 Detector

General Purpose and Flameproof Detector Models VD6D and VD6DF

Unit: mm

246

100

192

ø110

104

153

342

100

200

G3/4 *2

ø160

146

ø116

ø74

Sample lnlet

Rc1/4 *1

Steam Connection Rc1/4 *1

Steam Outlet Rc1/4 *1

2-inch Pipe

(Horizontal or Vertical)

Electrical Wiring Port

For VD6DF-

B/FM

*1: 1/4NPT

*2: 3/4NPSM

5th Edition : Dec. 11, 2015-00

<1. GENERAL>

1-8

IM 12T03A01-02E

Sanitary Use Detector Model VD6DS

Unit: mm

246

100

192

ø110

104

153

166

345

103

200

G3/4

ø160

146

ø116

ø74

Gland

Sample lnlet *1

Sample Output *1

2-inch Pipe

(Horizontal or Vertical)

Electrical Wiring Port

*1: The ends of sample inlet and outlet are connected with 1/8-inch

pipe in welding. The pipe may be removed by loosing the gland.

5th Edition : Dec. 11, 2015-00

<1. GENERAL>

1-9

IM 12T03A01-02E

1.3.2 Converter Model DM8C

Unit: mm

31 35

272

240

183

138

116

212±1 222

275±1

200

288

34 34 34 34

Wiring port holes (5-ø27)

(with rubber plugs)

Purge air outlet

(with seal sheet)

Mounting pipe

(2-inch pipe)

Pipe mounting bracket

Purge air inlet Rc1/8 *1

Mounting bracket (applicable with any mounting

method to panels, walls or pipes)

Mounting panel thickness

Max. 12

*1: When option code is specified, Rc1/4 or 1/4 NPT female connector is attached.

Panel cutout dimensions

Wall mounting hole drilling dimensions

2-ø9 holes or M8 screws

5th Edition : Dec. 11, 2015-00

<1. GENERAL>

1-10

IM 12T03A01-02E

1.3.3 Special Cable Model DM8W

Unit: mm

A B

GRAY

YELLOW

BROWN

RED

WHITE

BLUE

GREEN

BROWN

YELLOW

GRAY

130(from A)

Density detector

(from B)100

Density converter

(from B)

120

(from B)

110

(from B)100

(from B)90

(from B)80

110(from A)

60(from A)

(from A)

60(from A)

(Note) Cable length is specified by the suffix code of “-L”,  is specified in meter.

e.g. for 50 m, -L0050

for 100 m, -L0100

for 2 km, -L2000

ø15.8

Specified length

by “-L”

(Note)

5th Edition : Dec. 11, 2015-00

<1. GENERAL>

1-11

IM 12T03A01-02E

1.4 Cautions in Handling Flameproof,

Explosion-proof Instruments

1.4.1 Outline of Explosion-proof Instruments

Specicationsof“Explosion-proofInstruments”conformtotheregulationsofrelevantpublic

organizations.

ModelDM8VibrationTypeLiquidDensityMeterconsistsofadensitydetectorandadensity

converter.ModelVD6DFdensitydetector,explosion-proofinstrument,canbeinstalledin

hazardousareawhereexplosivegasesmaybegenerated.

It should be noted, however, that the method of installation, ambient conditions, and the handling

of these instruments must conform to the regulations of relevant public organizations. The

applicableexplosion-proofregulationsandthecautionsmarkedontheanalyzershallbestrictly

observed when using Model VD6DF in a hazardous location.

WARNING

ModelVD6DandModelVD6DSDensityDetector,whicharenot“explosion-proofinstrument”,

cannot be installed in hazardous location.

ModelVD6DFdensitydetectorhaseitherTIISorFMameprooftypeofexplosion-proof

specications.TheTIIStypehaspassedtestsconductedbyapublicauthorityinaccordancewith

theLaborSafetyandHealthLaw(Japan)whichregulatesdomesticexplosion-proofelectrical

equipment.TheFMtypehasbeencertiedtohaveanexplosion-proofconstructionmeetingthe

requirementsofNEC(NationalElectricalCode)byFactoryMutualResearchCorporation,U.S.A.

(FM),atestingorganization.ItalsoconformstorequirementsofOSHA(OccupationalSafetyand

HealthAct,U.S.A.).

Items 1.4.2 to 1.4.6 cover general cautions in using the Model VD6DF density detector. For

further details, see the following publications:

• ForTIISameproofrequirements

 ‘RECOMMENDEDPRACTICE’forElectricalEquipmentsforUseinExplosiveGas

Atmosphere published by The Research Institute of Industrial Safety, Ministry of Labor.

• ForFMFlameproofrequirements

 NationalElectricalCode,Chapter5,SpecialOccupancies.

1.4.2 Labeling the Explosion-proof Specications

TIIS Flameproof type of explosion-protected construction

TheModelVD6DFdensitydetectorislabeleddataplateonwhichtypeoftheexplosion-

protectionconstructions,approvalnumber,symbolsforthetypeandworkingambient

temperature range.

Table 1.1 TIIS Flameproof Type (Explosion-proof) Construction of Vibration Density Detector

Model and codes Type Approval No.

Symbol for the type (including

explosion class and ignition group)

ModelVD6DF-N1

Model VD6DF-S3

No.T21726

No.T21727

d2G3

FM Explosion-proof Specications

TheModelVD6DFdensitydetectorscomplyingwithFMexplosion-proofspecicationsislabeled

dataplatewhichismarkedwithanapprovalmark,classicationofhazardouslocation,working

ambient temperature range, and handling cautions.

5th Edition : Dec. 11, 2015-00

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YOKOGAWA vigilantplant DM8 User manual

YOKOGAWA vigilantplant DM8 User manual

YOKOGAWA vigilantplant DM8 User manual

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