sst digital•intelligent pressure / differential pressure transmitters manual.pdf · warning...

伟岸测器WECAN PRECISION INSTRUMENTS

CHONGQING WECAN PRECISION INSTRUMENTS CO., LTD

SST Digital•Intelligent Pressure / Differential Pressure Transmitter

User’s M

anualU

ser’s Manual

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User’s Manual for SST Digital•Intelligent Pressure / Differential Pressure TransmitterWarning

1. The transmitter is placed on the horizontal place before calibra-tion.2. Micro-range transmitter should be calibrated to zero after being mounted on-site.3. The transmitter is required to mounted in the dry environment to avoid the rain. In a harsh environment, the outdoor mounting is re-quired to use the protective housing.4. The user is prohibited to dismantle the device.5. The user is expected to check to see if the power supply of the transmitter is stable and clean (prevent the power supply from being AC disturbance).6. Fortheproductswiththeexplosion-proofcertificate,anyofitsele-ments or structure is not permitted to change.7. The grounding bolts of the transmitter are required to connect with the earth .8. Theoutfittedsafebarrieroftheintrinsicallysafetytypetransmittermust be used as per its users’ guide.9. In the case of the intrinsically safety type transmitter being used in the explosion hazardous environment, the power transformer for the safe barrier must conform to the requirements of the Standard GB3836.4-2000, Division 8.1.10. The special-purposed interconnection module of our company must be employed for the S-PORT communication interface.11. The communication equipment and the software of our company must be employed for the transmitter marking and temperature com-pensation with HART communications.

The user is expected to read this manual carefully after opening the box!

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User’s Manual for SST Digital•Intelligent Pressure / Differential Pressure Transmitter

Catalogue

Introduction ........................................................................................ 51. Overview........................................................................................ 71.1 SST Series Digital•Intelligent Pressure/ Differential Pressure Trans-mitter .................................................................................................. 71.1.1 Integral Appearance ................................................................. 71.1.2 Integral Structure ...................................................................... 81.1.3 Introduction to Working Principle .............................................. 91.2 SST Digital•Intelligent Direct-Coupled Pressure / Level Transmitter 101.2.1 Integral Appearance and Structure ........................................... 101.2.2 Introduction to Working Principle .............................................. 122. Mounting For Use .......................................................................... 132.1 SST Digital Series•Intelligent Pressure/Differential Pressure Trans-mitter .................................................................................................. 132.1.1 Integral Appearance Dimensional Drawing .............................. 132.1.2 On-site Mounting ...................................................................... 142.2 SST Series Digital•Intelligent direct-coupled Pressure/ Level Trans-mitter .................................................................................................. 192.2.1 Integral Appearance ................................................................. 192.2.2. On-site Mounting ..................................................................... 212.3 Issues Relating to Measurement Ways ....................................... 222.4 Electrical Mounting ...................................................................... 252.5 intrinsically Safety Type Explosion-Proof Transmitter System Wiring Drawing ............................................................................................. 273. Debugging and Operation ............................................................. 283.1 Summary ..................................................................................... 283.1.1KeysDefinition.......................................................................... 293.1.2 Description of Keys Functions .................................................. 303.1.3 Working State Display .............................................................. 303.1.4 Menu Description...................................................................... 303.1.5 Input Symbols ........................................................................... 313.1.6 Input Integer ............................................................................. 313.1.7 Input Decimal............................................................................ 313.2 Accuracy Micro-tuning of Transmitter .......................................... 32

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3.3 Instruction of Main Menu ............................................................. 333.4 Detailed Instruction of Sub-menu Operation ............................... 344. User’s Maintenance ....................................................................... 414.1 Summary ..................................................................................... 414.2 Soft Maintenance......................................................................... 414.3 Hard Maintenance ....................................................................... 424.4 Troubleshooting ........................................................................... 435. Instructions For Mounting and Use of Flange-Type Transmitter.... 465.1 Summary ..................................................................................... 465.2Specifications: ............................................................................. 465.3 Calibration of Instrument ............................................................. 505.4 Usage of Instrument .................................................................... 505.5 Instrument Maintenance .............................................................. 575.6 Instructions for Order ................................................................... 57Appendix............................................................................................ 60A.1 Model Composition ..................................................................... 60A.2 Accessories and Material Code................................................... 61A.3 Functional Indices ....................................................................... 62A.4 Accessories ................................................................................. 68A.5 Precautions ................................................................................. 68

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User’s Manual for SST Digital•Intelligent Pressure / Differential Pressure TransmitterIntroduction

SST Series Digital•Intelligent Pressure/Differential Pressure Trans-mitter is a multipurpose digitalized intelligent instrument developed by ChongQing WECAN Precision Instruments Co., Ltd., including capaci-tance pressure /differential pressure transmitter and direct-coupled pressure/ level transmitter. It is made on the basis of the mature and dependable sensing technology, combining the advanced single-chip computer technology and sensor digital convert technology.

16-bit single chip is adopted as its core element, with its powerful function and high-speed calculation capacity ensuring the excellent quality of the transmitter. The whole design frame focuses on its de-pendability, stability and high precision and intelligentization, meeting the growing demand in on-site industrial use. To get this goal, digi-talized signal processing technology is used in the software to ensure its disturbance capacity and zero point stability. Meanwhile, it has the Zero Stability Capacity (ZSC) and Temperature Supplementing Capac-ity (TSC).

The powerful interface functions guarantees an excellent interactivity with no need of manual operator. Its digitalized meter head can display 3 physical parameters including pressure, temperature and current, and0-100%analogue indications.Keystrokeoperationcanfinishthebasic settings of zero shift, range setting, damping setting under the circumstance of no standard pressure, greatly convenient for the on-site debugging.

S-PORT serial communication port can communicate with the com-puter through the special purposed interconnection module, while the uppercomputerinterfacecanfinishmorefunctionsthanthekeystrokeoperation. By connecting with module RS485, it can realize the remote transmission of digital signal, or the building up of RS485 industrial LAN.

SST series digitalized Intelligent Pressure/ Differential Pressure

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Transmitter has the optional HART module. After the transmitter is added the HART module, it has HART communication capacity, with the conventional operation being controlled with the general manual operator. The special communication equipment and software provided by our company can operate the marking and temperature supplemen-tation actions.

SST series digitalized Intelligent Pressure/ Differential Pressure Transmitter can be widely used in the sectors such as petroleum, chemical, iron & steel, power generator, light industry and environmen-tal protection, capable of realizing the measurement of various pres-sures,differentialpressures,flowsandlevel,adaptableforallkindsofharsh and hazardous environment and corrosive mediums.

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User’s Manual for SST Digital•Intelligent Pressure / Differential Pressure Transmitter1. Overview

1.1 SST Series Digital•Intelligent Pressure/ Differential Pressure Transmitter

1.1.1 Integral AppearanceLength/width/height/quality (noaccessories):98mm/78mm/169mm/2.4kg

Fig. 1-1

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1.1.2 Integral Structure

Fig. 1-2

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Temperaturesensor

4-20mA signal outputCurrent controlcircuit

16-bit singlechip computerSignal change

circuitCommunication

port

Pressure Pressure Linear constant

Measurementscope constant

Transmitterconfiguration

Zero alignmentbutton

ButtonDisplay module

1.1.3 Introduction to Working Principle

Fig. 1-3

As indicated in the working principle diagram Fig. 1-3, the outside pressure or differential pressure will cause some change in the sensor capacitance value. Through the digital signal conversion, it will change into the frequency signal, which is sent to the microprocessor. After the calculation by microprocessor, a current control signal will be output to the current control circuit, converted into analogue 4-20mA current output. Meanwhile, the microprocessor is responsible for the interactive and other actions (display and setting). The communication port used for digital communication needs the special port of our company. HART module will realize the transmitter HART communication.

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1.2 SST Digital•Intelligent Direct-Coupled Pressure / Lev-el Transmitter

1.2.1 Integral Appearance and Structure1) SST2001 Integral Appearance

Length/width/height/quality (noaccessories):98mm/78mm/152mm/0.75kg

Fig. 1-4

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2) SST2138 Integral AppearanceLength/width/height/quality (no accessories): 98mm/78mm/

131+(wire length) mm /0.75kg (varied in weight for different types)

Fig. 1-5

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TemperatureSensor

Current ControlCircuit

4-20mA Signal output16-bit single

chip computer

A/D ConversionCommunication

port

Linear constantMeasurement scope constantTransmitter Configuration

Zero alignmentbutton

buttonDisplay module

1.2.2 Introduction to Working Principle

Fig. 1-6

As indicated in the working principle diagram Fig. 1-3, the outside pressure or differential pressure will cause some changes in the sensor resistance value and the output value of bridge voltage. Through A/D conversion, it will change into the digital signal which is sent to the mi-croprocessor for calculation; then a current control signal will be output to the current control circuit, converted into analogue 4-20mA current output. Meanwhile, the microprocessor is responsible for the interactive and other actions (display and setting). The communication port used for digital communication needs the special port of our company. HART module will realize the transmitter HART communication.

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17 mm is the minimum backwarddistance of the wiring box cover.

2. MountingFor Use

2.1 SST Series Digital•Intelligent Pressure/Differential Pressure Transmitter2.1.1 Integral Appearance Dimensional Drawing

Fig. 2-1

MModel 1200 1300 1400 1500 1600 1700 1800 1900 1000

Size(mm) 54 55.6 57.2 58.4 59.2

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2.1.2 On-site Mounting1) Mounting Steps

The transmitter can be directly mounted onto the 2-inch conduit or onto the wall and the meter panel. (See Fig. 2-2.)

B1conduitcurvebracket B2platecurvebracket B3conduitflatbracketFig. 2-2

After releasing the bolt, electronics housing can be rotated 90°to the left and right.

Warning:Neverexceed90°toavoidtheinsideparallelwiresbreak-ing!

2) Way of Pressure Impulse

Thereare3kindsofwaysofpressureimpulse:

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Joint Flange Way

(Ordering Code G1)

Fig.2-4

Weld Conduit Connector

(Ordering Code G2)

Fig. 2-5

Integral 3-valve group

(Ordering Code G3)

Fig. 2-6

Notes:Pressuretransmitterusesoneterminalonly(H or L), with an-other terminal for reference .

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Vent Valve (up)

Drain Valve (down)

3) Vent/drain valve

Usually, vent/drain valve should all be locked up, and only put in use in need of dis-charge gas/fluid; our company has the default config.uration standard of up/down vent/drain valve.

Fig. 2-7

4) Cover Lock

Screw down the bolt to open up the cover; release the bolt to lock up the cover. Usually, the cover should be ensured of be-ing screwing down to avoid its inside being damaged.

Fig. 2-8

5) ProcessConnectionOrificeDistanceAdjustment

The process connection orifice on the pressure capacity room is NPT1/4-18. It isrequiredtoseal theseorifices. Intheuseof the jointflangeconnector,dismantlingtheupperandlowerboltsoftheconnec-tor can easily disassembly the transmitter from the production unit. The center distance between 2 process connection orifices is 54mm. the

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Zeroalignment

center distance can vary in the range of 50.8mm, 54mm and 57.2 mm byrotatingthejointflangeconnectorasindicatedasthefollowingFig-ure:

Fig.2-9 6) Mounting and Calibration

Due to the gravity of the diaphragm and silicone oil, the transmitter gravity to be mounted in horizontal plane will result in zero deviation (about 240Pa in the maximum amount), and particularly serious for the transmitters with middle & low range. Yet it can be calibrated to zero on the site. In operation, there is a calibration button on the left side of the housing body of the transmitter. Open the nameplate and keep press-ingitdownforabout5sectofinishthezeroalignment.SeeFig.(2-10):

SpecialNote: Pleasemakesure that the transmitter has a zero value of differential pressure in zero alignment. Or the trans-mitter will induct the zero shift!!!

Fig. 2-10

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7) Attention to Mounting Operation1. keep the transmitter away from the tested mediums such as cor-

rosiveorhightemperature(≥90℃ ) .2. Prevent the sediment from being left in the conduit.3. Make the pressure conduit as short as possible.4. Thefluidpressurehead inbothconduitsshouldbekept inbal-

ance.5. The pressure conduit should be mounted where temperature

grade and small fluctuationarea.6. Prevent the inside pressure conduit from being crystallized or

iced at low temperature.

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Process Port Screw (M20×1.5 as default )

2.2 SST Series Digital•Intelligent direct-coupled Pressure/ Level Transmitter2.2.1 Integral Appearance

SST 2001 Structure Dimensional Drawing

Fig. 2-11

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Electronic Box

Flange (optional)

Stainless Steel PipePipe

Armored Metal Sleeve

Armored Fluid Sensor Head

SST 2318 Structure Dimensional Drawing

Fig. 2-12

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2.2.2. On-site Mounting

SST 2001 Series direct-coupled Pressure Transmitter can be di-rectly mounted onto the conduits by use of M20×1.5 or NPT1/2 outer screw, with the screwing moment no more than 30ft-1bs (or 40N.m); SST 2318 Series direct-coupled Pressure Transmitter can be put into thefluid foruse,optional in3mountingways including local,bracketandflange.Trytomountthetransmitterinaplacewithsmalltempera-ture difference, and avoid vibration and concussion. When mounting in an open air, try to keep the transmitter in a dry and ventilated place, avoid the strong sunshine and raining, which may result in the decline in the integral performance and longevity. In the process of mounting a transmitter,thefollowingcasesarerequiredtotakeintoconsideration:

■ Prevent the cable from getting direct contact with the strong cor-rosive mediums

■ Avoid thesedimentor jamof residues inside theprobeandpressure impulse conduit

■ Pressure impulse conduit should be as short as possible

■ The transmitter or pressure impulse conduit should be mounted a place with small temperature difference.

In wiring of the transmitter the signal wire should not go through with other power wires the wiring pipe or groove, nor through the nearly po-sition of the equipment with bigger power. The measurement of steam or other high temperature mediums can be done through the process by cooling device. The measurement of steam agent may be done by wayofgettingthepressure impulseconduitfilledwithwaterorotherfluidstoavoidthedirectcontactofthetransmitterwithsteam.

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2.3 Issues Relating to Measurement WaysFluidMeasurement:

In the measurement of fluid flow, the pressure taps should be breached on the side of the process conduit to avoid the sediment of dregs. Meanwhile, the transmitter should be mounted beside or under the pressure taps, to prevent the air bubbles from being discharged into the process conduit.GasMeasurement:

Inthemeasurementofgasflow,thepressuretapsshouldbeopenedbreached at the top or side of the process conduit. And the transmitter should be mounted beside or on the process conduit, to make the col-lectedfluidfloweasilyintotheprocessconduit.SteamMeasurement:

In the measurement of steam flow, the pressure taps should be opened breached on the side of the process conduit. And the transmit-ter should be mounted under the process conduit, to make the cooled collectedfluidflowintotheprocessconduit.

To be noted, in the measurement of steam or other high temperature mediums, its temperature should not exceed the limited level for the use of transmitter.

As for the measured agent like steam, the conduit is required to be filledwithwatertopreventthesteamfrombeingdirectcontactwiththetransmitter. Thus when the transmitter is in working state, its capaci-tance variation would be ignored with no need of mounting cooling pot.LevelMeasurement:

The differential pressure transmitter used for measuring the fluid levelistodetectstaticpressureheadforthemeasurementoffluidbar.Thispressuredependsonthefluid levelandthefluidproportion,withitsvalueequaltothefluidheightoftheupperpartofthepressuretapsmultiplyingthefluidproportion,andirrelevanttothecontainer’svolumeor form. Fluid Level Measurement of Breached Container

In this kind measurement, the transmitter is mounted at the bottom near the container so as to measure the corresponding pressure of the upperpartoffluidlevel.

Thepressureof thecontainerfluid levelactsonthehigh-pressure

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side of the transmitter, while its low-pressure side open to the atmo-sphere.Ifthelowestvalueintherangeofthetestedfluidlevelisattheupper position of the transmitter mounting location, the transmitter must undergo the positive shift.Fluid Level Measurement of Sealed Container

In the sealed container, the pressure P0oftheupperfluidcontaineraffects the tested pressure of the container bottom. So the pressure of thecontainerbottomisequaltothatthefluidlevelheightmultipliesthefluidproportionthenplusthepressureP0 of the sealed container.

Totesttherealvalueoffluidlevel,itisrighttominusthepressureP0 of the container from the tested pressure of the container bottom. For this, a pressure taps should be breached at the container top, and have it connected to the low-pressure side of transmitter. Thus, the pressure inside the container will act on both high and low sides of the transmit-ter.Theresultobtainedisadirectproportiontotheproductofthefluidlevelheightmultiplyingwithfluidproportion.

Pressure Impulse Connection Ways1) Dry Pressure Impulse ConnectionInthecaseofthegasonthefluidrefusedtocondensate,thecon-

nection conduit at the low side of transmitter will keep dry. This is so called Dry pressure impulse connection. The way determining the mea-surerangeoftransmitteristhesametothatofbreachedcontainerfluidlevel.

2) Wet pressure impulse ConnectionInthecaseofthegasonthefluidgettingcondensate,therewillbea

gradualfluidaccumulationinsidethepressureconduitatthelow-pres-sure side of transmitter, leading to an error on measurement. To avoid thiserror,certainfluidisfilledintothelow-pressuresideoftransmitterbeforehand; this is called Wet pressure impulse Connection.

The above situation will make the transmitter be with a head at the low-pressure side, so a negative shift is needed.

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Decrease ErrorPressure conduit makes transmitter connect with process technic

conduit, and transfer the pressure at the pressure taps along the tech-nic conduit to the transmitter. In the process of pressure transmission, thefollowingreasonsmaycausetheerrors:

1) Leakiness;2) Abrasion loss (particularly in the use of detergent);3) Some gas existing in the fluid conduit (resulting in pressure

head error);4) Accumulatedfluidinthegasconduit(resultinginpressurehead

error);5) Density difference caused by the time difference between con-

duits (resulting in pressure head error);Thefollowingwayscanbeusedtodecreasetheerrors:

1) Pressure conduit should be as short as possible;2) When measuring fluid or steam, the pressure conduit should

be connected up to the process technic conduit, with its rake less than 1/12;

3) For the measurement of gas, the pressure conduit should be connected down to the process technic conduit, with its rake not less than 1/12;

4) The layout of fluid pressure conduit should avoid an extruded point in the middle part, while the gas pressure conduit avoids the sunken part;

5) Both pressure conduit should keep in the same temperature;6) To avoid the friction, the diameter of pressure conduit should be

wide enough;7) Nogasisfoundinthepressureconduitfilledwithfluid;8) Whenusing isolatingfluid, thefluids inbothpressureconduits

should be the same;9) When using detergents, the connection part of detergent should

be near to the pressure taps of technic pipe; the conduit way passed through by the detergent should be the same in length and diameter. Try to avoid detergent passing through the transmitter.

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Amperemeter

PowerSupply

Standard 24V DCSupply

2.4 Electrical Mounting

SystemWiringDrawing:

Fig.2-13(Note1:Usercaninstall thedistributororsafebarrierspertheon-

site and design requirements. For details, see the usage of distributor and safe barrier.)

It is recommended to choose the explosion-proof impulse terminal with thecablediameterofφ8–φ12. The connection terminal is set with test terminal, convenient for the online test of the operator.

Signal terminal is situated in a separate housing of the electrical box. Screw up the meter cover for wiring. The upper end is for signal, while the lower end is for test meter. Fig. 2-13 indicated the terminal location. The test terminal is used for connecting any optional indicator head or test. The power supply goes to the transmitter through the si nal line, with no need of additional wiring.

!SpecialAttention:Donotconnect thepowersignal lineto thetestterminal; otherwise the diode inside the test terminal would be de-stroyed.

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In case of the diode being damaged unfortunately, shortcutting the test terminal can keep the transmitter working on, except the indicator unable to connect.

No need to shield the signal wire, and litz wire can be used for better effect. Do not lay together the signal wire and other power wires, to get near to the heacy current installation.

The wiring orifice on the housing body of transmitter should be sealed or inserted in a plug smeared with seal glue to prevent the hu-midity being accumulated in the housing. In the case of the wiring not beingsealed,thetransmittershouldbemountedwiththewiringorificeupside down to discharge the moisture.

The signal line may ignore the grounding (hanging) or get to ground at any point on the loop line. The transmitter housing can have ground-ing or not, and the power has no need of being stabilized, even if the power ripples has a peak-to-peak value of 1V. And the output ripples of transmitter can also be ignored.

Since the transmitter gets grounded by way of capacitance coupling, it is not appropriate to use a high-voltage mega-ohm meter to check the insulation resistance. The voltage used for checking the line should be no more than 100 V.

The transmitter circuitry is designed as intrinsic safe circuitry, limiting the output current below 30 mA DC (35 mA DC under the condition of high temperature or high voltage).

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Ui: 28vDC Um≥250VAC/DCIi: 30mA Uo≤28VDCPi: 0.84W Io≤30mA Po≤0.84W

2.5 intrinsically Safety Type Explosion-Proof Transmitter Sys-tem Wiring Drawing

Note:SeeGB3836,4-2000standardforthedefinitionsofUm,Uo,Io,Po,

Ui, Ii, Pi .The connection wire or cable between safe barrier and transmit-

ter has a largest allowed distribution capacitance CP of no more than 0.02uF, and the largest allowed distribution inductance LP of not more than 2.0mH.

Dangerous Zone Safe Zone

Tran

smitt

er

Intrinsically safety type Terminal

Saf

e ba

rrie

r Non-intrinsically safety type Terminal

Con

nect

to

Sec

onda

ry

Met

er

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User’s Manual for SST Digital•Intelligent Pressure / Differential Pressure Transmitter 3. Debugging and Operation

3.1 Summary

Meter Head Panel Diagram (All Liquid Crystal Display)

Fig. 3-1

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0 50 100%

InstructiontoDisplay:PV-----Transmitter in measurement stateSV-----Transmitter in setting stateEr-----Excessive pressure or sensor circuit faultmA-----SignifiesLCDdisplayofoutputcurrentvalue%-----SignifiesLCDdisplayofpercentageofmeasurementpressure

corresponding to setting range℃ -----Signifiestheaveragevalueofmeasurementagentandenvi-

ronment temperature√-----SignifiestheoutputcurrentoftransmitterinsquarerootstatekPa-----SignifiesLCDdisplayofpressureunitMPa----SignifiesLCDdisplayofpressure unit

--------Signifiestheanalogueindicationof pressure measurement correspond-ing to setting range

S-PORT---Special Communications Port

3.1.1KeysDefinition

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Measurementstate Main Menu sub-menu parameters

setting/marking

3.1.2 Description of Keys FunctionsESC:cancelthecurrentoperationandreturntothepreviousopera-

tionMOVE:movecursoranddecimalpointintypingdataENTER:enteramenuandconfirmaoperationDOWN:Aspagingdownamenuandinputtingdata,cursorposition

digital less 1Up:Aspagingupamenuandinputtingdata,cursorpositiondigital

plus 1

3.1.3 Working State DisplayPVDisplay:inmeasurementstateSVDisplay:insettingstateErDisplay:signalcircuitfailureorpressureexceeded

3.1.4 Menu DescriptionMenu is constructed in levels, and the maximum is 4 levels, as fol-

lows:

RollingandSelectionofMenu:Press the UP key roll to display the items in ascending orderPress the DOWN key , roll to display the items in descending orderPress the ENTER key , enter the corresponding sub-menu or spe-

cificfunctionoperationsPress the ESC key , return to the previous menu

As indicated below,

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3.1.5 Input SymbolsUse UP or DOWN to change the highest digital (the left-most one of

the 6-digital LED), and its loop order is 0…9, -0, …; the common digi-talshavethelooporderas:0…9,0…

3.1.6 Input Integer When an integer is input, the screen displays XXXXXX, and the low-

estdigitalflashestoindicatethecursorposition.Press the UP key to increase 1 number of the cursor locationPress the DOWN key to decrease 1 number of the cursor location When a negative number is input, the negative symbol is input at the

location of the highest digitalPress the MOVE key to move 1 digital to the left in cursor loopPress the ESC key to return without savingPress the ENTER key to save and return

3.1.7 Input DecimalWhen a decimal is input, the screen displays XXX.XX (depending on

thedecimaldigital),andthedecimaldigitalflashestoindicatethecur-sor position.

Press the UP key once and release to increase 1 number of the cursor location

Press the DOWN key once and release to decrease 1 number of the cursor location

When a negative number is input, the negative symbol is input at the location of the highest digital

Press the MOVE key to loop the cursor by 1 digital to the left, and decimal will follow the move

Press the ESC key to return without a savePress the ENTER key to save and returnUse UP and DOWN to change the highest digital number and input

the negative symbol

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3.2 Accuracy Fine tuning of Transmitter

(Instruction:since thedifferencesof thestandardandgravityac-celeration may result in accuracy error of transmitter. Users can do the output micro tuning through this operation to enhance its accuracy.)

1) Reset:pressdowntheUP and DOWN keys at the same time for about 5 sec will reset the transmitter, and the program restarts.

2) EnterMenu:PressdownENTER forabout5sec toenterMain Menu for the corresponding operations.

3) CalibrationOperation:i)Instruction:Atransmitterhas3valuesofcalibration:ZeroPoint,shiftZeroPoint

and Range Point.ZeroPoint:differencevalue iszero,e.g.HandLroomshavethe

samepressure,definedasthephysicalzeropoints.ShiftZeroPoint:4mApressurepoint (thepossiblephysicalzero

point),definedaslogiczeropoint.RangePoint:20mApressurepoint(thepossiblephysicalzeropoint).ii) OperationA) Under the condition of no standard pressure, only the physical

zero point can be calibrated.Method:Pressdownthehousingbodybuttonforzeroalignmentor

the DOWN key for about 5 sec, then “GOOD” will display after releas-ing it, prompting the completion of physical zero point calibration, “0” will display after calibration.

B) Under the condition of standard pressure source, it is available for the calibration of transfer range point and zero point. But these op-erations cannot be done usually. A password is a must to acquire the authority before doing these operations.

① When the authority is acquired and the shift zero point is not “0”, the shift zero point can be calibrated.

Method:after thepressure isaddedup to thestabilizedpressurevalue of transfer zero point, press down the DOWN key and the MOVE key for about 5 sec for a short moment display of “00”, the calibration of shift zero point will be completed.

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② When the authority is acquired and only the range point is not “0”, the range point can be calibrated.

Method:after thepressure isaddedup to thestabilizedpressurevalue of range point, press down the key UP for about 5 sec, then “GOOD” will display for seconds after releasing it, prompting the com-pletion of range point calibration.

3.3 Instruction of Main Menu

Usually, the main menu has 7 items for rolling display, respectively asfollows:

Sub0:displaysetting(unitsetting)Sub1:zeroshiftSub2:rangesettingSub3:pressureportH.LterminalsswitchingSub4:settingcommunicationsaddressSub5:dampingsettingSub6:passwordverifyingandsetting(afterverificationissuccess-

ful)

Afterthepasswordisinputandverified,themenuswillchangetoarolling display of 14 items. A restart will go back to the 7-item menu.

Thefirst6 items in the14-itemmenusarethesameto theabovementioned,andtherestitemsarerespectivelyasfollows:

Sub7:currentparameterssetting(R0,R100)Sub8:P100setting(maximumratingrange)Sub9:displayorinputdifferentialpressuremarkingpointSub10:markdifferentialpressuresinroomtemperatureSub11:reversemarkdifferentialpressuresinroomtemperatureSub12:displayorinputtemperaturepointSub13:displayorinputtemperaturecompensationpoint

In the state of main menu, no key operation for 2 min will return to the measurement state.

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3.4 Detailed Instruction of Sub-menu Operation

I. Sub 0 display unit setting

After entering Sub 0 menu, the display will be the current measure-ment value and the corresponding unit; when the current is output in square root, it will display “√” unit optional menu, 6 items in rolling dis-playareasfollowsinsequence:

0 kPa1 MPa2 mA3 %4√mA5 ℃

Press the UP key and the above items will roll to display in ascend-ing order

Press the DOWN key and the above items will roll to display in de-scending order

Press the ENTER key will complete selection, and save into memo-rizer, then return to main menu

Press the ESC key will cancel the operation and the unit remains unchanged, then return to main menu.

In the state of this menu with no key action for 2 min, the menu will return to the measurement state with the unit remaining unchanged.

Note:outputwayofcurrentdependsonlyonitem2and4,andtheother options will not change the original current output way. No square root function is configured with the digital•intelligent direct-coupled pressure/level transmitter.

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II. Sub 1 Zero Shift

Upon entering Sub 1 menus the display will prompt the input of a floating-pointnumber.Thedisplayistheoriginalsetting.Inputthezerotransfer point (unit kPa), press ENTER and then return to main menu after this operation. The setting of zero point transfer will have no impact on the range, but the setting is not allowed to exceed the maxi-mum rating range.

III. Sub 2 Range Setting

Same to the operation of Sub 1 menu, Sub 2 is only used for set-ting the full-range, which is not allowed to exceed the maximum rating range as well.

IV. Sub 3 Switching Between High-Pressure Terminal and Low-Pressure Terminal

Notes:thisfunctionisnotavailableforSSTSeriesDigital•Intelligentdirect-coupled Pressure/Level Transmitter.

Usually,differentialpressuretransmitterisdefinitewiththeH-L,setupon leaving the factory, and the user is not permitted to change it.

After entering this menu, it will display the current setting status and achangeisnotpermitted.Toresetit,inputthepasswordinSub6firstto get the calibration authority, then use UP and DOWN keys to set the options,andENTERtoconfirm.ESCwillkeeptheoriginalsettingandreturn.

V. Sub 4 Setting of Communications Address

As more than one instruments are connected and communicate with the upper computer, each instrument must have different address. Oth-erwise,aresponseconflictionmayoccur, failingtofinishcommunica-

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tions task. Upon entering this menu, an integral will display, the original addresspoint. Input thenewaddressandpressENTERtofinishthesetting, and return to the main menu. Press ESC will keep the original setting and return to main menu.

VI. Sub 5 Damping Setting

Same to the operation of Sub 4, Sub 5 is only used for setting damp-ing value (0-32 sec or more).

VII. Sub 6 Password Management

Upon entering Sub 6 menu, input an integral, the password, at the screen prompt, the program will verify whether or not the password is correct. If the input password is wrong, it will display “ERROR”, press ENTER will return to main menu. If the input password is the access password or user password, the menu system will be extended into 14-item menu, allowing more operations. Meanwhile, at this moment, Sub 6 will reset the user’s password.

If a special password is input, and the corresponding function can befinishedasdescribedbelow:

040820:cancelshiftzeroalignmentandobtaincalibrationauthority.040821:cancelrangecalibrationandobtaincalibrationauthority.050728:clearphysicalcalibration

Note:theoperationsinSub7throughSub13arerelatingtothecoreparameters, and forbidden to use without the authority. This manual has no instruction on these operations.

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ExamplesForTheOperations:1) Zeropointsetas–5kPa(negativeinput)Press down the ENTER key for about 5 sec, and release it to enter

mainmenu.Thedisplayisasfollows:

Press UP to roll the menu and repeat it once, the display is as fol-lows:

PressENTERtoentersub-menuandthedisplayisasfollows:

The current value is 0The cursor flashes before the decimal point

Press the MOVE key to move the cursor and decimal point and re-peatitfor3times,thedisplayisasfollows:

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Press the UP key to regulate number and repeat it for 5 times, the displayisasfollows:

Press the MOVE key to move the cursor and decimal point and re-peatitforonce,thedisplayisasfollows:

Press the DOWN key to input the negative symbol and repeat it for once,thedisplayisasfollows:

Press the MOVE key to move the cursor and decimal point and re-peatitfor5times,thedisplayisasfollows:

Press ENTER to save the setting and return to main menu

Press ESC to return to measurement state.

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2) Range set as 7.2 kPa (decimal input)Press down ENTER for about 5 sec, and release it to enter main

menu,thedisplayisasfollows:

Press UP to roll the menu and repeat it for twice, the display is as follows:

Press ENTER to enter Sub 2 sub-menu, and the display is as fol-lows:

Display the previous value (8kPa), the cursor flashesattheunits’digit

PressDOWNonce,lessthecursordigits,thedisplayisasfollows:

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Press MOVE to move the cursor to the 2nd digit in the right as fol-lows:

Press UP to increase the cursor digits for a consecutive 2 times in thefollowingdisplay:

Press MOVE to move the cursor to the 3rd digit in the right as fol-lows:

Press ENTER to save the setting and return to main-menu

Press ESC to enter the measurement state.

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User’s Manual for SST Digital•Intelligent Pressure / Differential Pressure Transmitter4. User’s Maintenance

4.1 Summary

Our digital•intelligent pressure/ differential pressure transmitter is smartandfixed,withZeroStabilityCapacity(ZSC)andTemperatureSupplementing Capacity (TSC) plus seldom-regular maintenance. Functionally, a digital transmitter is largely comprised of 3 parts includ-ingsensormodules,maincircuitboardandmeterhead.Where:maincircuit board is fastened with sensor modules with bolts, and coagu-lated with sol as a whole. This integrated design structure can stabilize the distributed capacitance and parasitic capacitance between them. Meanwhile, the decreasing of signal collecting circuit and signal source distance reduces the disturbance. This compact structure also provide a more solid and reliable transmitter with few problems occurred.

4.2 Soft Maintenance

The digital transmitter is an intelligentized product with its param-etersopentotheusers,whomayadjustaspertheactualsituationthezero point, and set range and damping, even re-mark it. Likewise, this could cause the confused parameter setting or core parameter being modifiedresultinginasoftfault.Inthecaseofcoreparameters(markedvalue upon ex-factory) being changed, it is necessary to re-mark it as per the operational instruction or reset the parameters through the way of communications, so as to make it work normally.

In the actual need of zero point re-calibration, press down the button for zero alignment on the side of the transmitter for about 5 sec to real-ize the manual operation. In need of the setting of other parameters, justscrewupthemeterheadcover,andfinishtheoperationwiththekeystrokes or communications.

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4.3 Hard MaintenanceGenerally, sensor modules, circuit board and meter head are not in

the range of on-site repair. The hard fault maintenance item is only lim-ited to circuit connection check, transmitter cleaning, changing meter head and wiring terminals check.

Testing TerminalsThe testing terminals are connected with the both terminals of a

diode, wit the loop signal power passing through inside. When the indi-cator head or testing equipment is connected with the testing terminals, the diode is shortcut. Except the voltage between both terminals less than the valve voltage of the diode, no current would pass through the diode. In testing or connecting the indicator head, to ensure no current passing through diode, the testing equipment or meter head should not havearesistanceofnomorethan10Ω(for4-20mADCmodel).Theresistance value over the above value by 3 times would generate an error of less than 1%. There are conductive copper components on the lower left side of “+”, and the lower right side of “-”, which can be used, in theelectrifiedstateof transmitter, to test theoutputcurrentwithadigital multi-meter.

Meter Head CheckScrew up the meter head cover, release the two M3 bolts with Phil-

ips screwdriver and take out the meter head; plug out the Parallel wires and the power supply to dismantle the meter head. It is also the time to check to see if there is either any dirt or any problems with the line connection board. For any of the problems, deal with it in time. Reas-sembly of the meter head should be done in the reverse order of dis-mantling.

Check Main Body of Process Sensor (Capacitance Sensor)Payattentiontothefollowingrespects:

1) Before the disassembly of the sensor main body, it is required to dismantle the transmitter from the working point.

2) After reassembly, it is required to undertake the cycling of the

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temperature and pressure to ensure its precision. This is included in the reassembly steps of process sensor main body.

3) Dismantlethe4majorboltstodismantlethepressureroom.4) Use the soft cloth or mild detergent to clean the isolating dia-

phragm, and then wash it with water.5) Pressure room can be rotated or assembled in reverse for con-

venience.

Check Wiring TerminalsScrew up the rear cover, the wiring terminals can be seen. Release

the 2 locating bolts to take down the wiring terminal cover, and the wiring circuit board is visible. Check to see if the board is connected correctly and reliably, pay a special attention to the assembly of feedthrough capacitors and testing diode.

4.4 TroubleshootingSymptom:OveroutputPotentialreasonsandtroubleshootingmethods:

Primaryelements:checktherangeoftheprimaryelements

Pressureconduit: Checkthestateofleakageandjam If the cut-off valve is in full-open state Checkthegasinthefluidconduitandfluidinthegasconduit. Ifthefluidproportionofconduitischanged. Check the dregs in the pressure room.

ElectricalConnectionofTransmitter:confirmiftheplugseatofPar-allel wires is clean.

Electricalpartiallytest:checkifthetestdisplaypressurevaluehasabigger deviation with the actual pressure value. If yes, it is required to re-mark it or send it back to factory for a proper treatment.

��


Circuitcheck: if thedisplaypressurevalue isconsistentwith thecurrent output. If not, the current is needed to re-regulate.

SensorModule:seethissection”CheckMainBodyofProcessSen-sor”.

PowerSupply:checktheoutputofpowersupply.

Symptom:unstableoutputPotentialreasonsandtroubleshootingmethods:

ParameterCheck:ifthezeroshiftandrangesettingarecorrect.LoopWiring:ifthetransmittervoltageisnormal.Checktheintermit-

tent shortcut, open circuit and multiple grounding points.Testedagentpulse:regulatethedampingvalue.Pressureconduit:Checkthegasinthefluidconduitandthefluidin

the gas conduit.ElectricalPartTest:check tosee if thepressurevalue isstable

through meter head, and then confirm if the instability is caused by sensor and circuit board. If yes, change the senor and circuit board.

Symptom:under-outputornooutputPotentialreasonsandtroubleshootingmethods:

ParameterCheck:ifzerotransferandrangesettingarecorrect.

PrimaryElements:Check elements assembly and working conditions. Any changes of tested mediums characteristic

would affect input state.

LoopWiring:ifthetransmittervoltageisinanormalstate. Check short circuit and multiple grounding points. If the polarity is right connected. Check the loop impedance.

��


Pressureconduit:ifthepressureconnectioniscorrect. Checkthestateofleakageorjams. Checkthegasinthefluidconduit Check the dregs in the pressure room. If the cut-off valve is full open and the balance valve is closed. Checktoseeifthefluiddensityischangedinthe pressure conduit.Electricalconnection:if thesensormodulewiringhasashortcircuit

, ConfirmiftheParallelwiresplugseat is clean.Check the wiring state of sensor modules. Check if the 8 pin of the plug seat is correctly connected to the housing.

DiodeFaultTest:changethediodeorshortcircuitthetestingtermi-nals.

ElectricalFaultofTransmitter:useastandbyboardtotestifthecir-cuit has a fault and change the faulted board.

SensorModules:seethissection“CheckMainBodyofProceSen-sor”.ter

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User’s Manual for SST Digital•Intelligent Pressure / Differential Pressure Transmitter5.1 SummaryCapac i tance f lange

differential pressure/ pres-suretransmitter is linkedinaflangewaywiththetestedpartusedforthefollowingoccasions:

① It is required to isolate the high-temperature mediums from the transmitter;

② The tested mediums is corrosive to the sensitive elements of transmitter;

③ Thetestedmediumisfloatingfluidorofhighviscosity;④ Thetestedmediumisliabletosolidifiedorcrystallizedduetothe

change of environment or process temperature;⑤ The change of the tested medium needs to purify the testing

head;⑥ The testing head must keep clean.

Capacitance flange differential pressure/ pressure transmitter is manlyusedforcontinuouslyandpreciselymeasurethefluids,gasesandvapourregardingtotheirdifferentialpressureandthefluidlevel,in-terface and density, etc. Working with the throttling device, it is capable ofcontinuouslymeasuretheflowofgases,fluidsandvapour.Andthetested signal can be converted into 4-20mA DC 2-wire system signals, which can be matched with other unit instruments or industrial control computers as the input signal of indication, recording and regulator to form the industrial automatic system for testing, recording and control.

5.2Specifications:5.2.1Flange-Type(Single-flat,Single-insert)LevelTransmitter5.2.1.1 Measurement Range

0-1.2kPa-2.5MPa(0-120mmH2O-250000mmH2O)5.2.1.2 Working Pressure (Static Pressure)

0.1–4Mpa

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5.2.1.3 Model

No. Name Model RangeRating working

pressure(MPa)

1Single-flatflangediffer-ential pressure transmit-

ter

SSTCC-3312 0-1.2-7.2kPa 2.52 SSTCC-4412 0-6-40kPa 43 SSTCC-4512 0-30-180kPa 44 SSTCC-4612 0-0.16-1MPa 45 SSTCC-4712 0-0.4-2.5MPa 46

Single-in-lineflangedifferential pressure

transmitter

SSTCC-3332 0-1.2-7.2kPa 2.57 SSTCC-4432 0-6-40kPa 48 SSTCC-4532 0-30-180kPa 49 SSTCC-4632 0-0.16-1MPa 4

10 SSTCC-4732 0-0.4-2.5MPa 4

Table 5-1

5.2.1.4 Flange Fluid Level Transmitter (e.g. Flat Flange and In-line Flange)

FlangeStandard:(HG20592-20635-97)ChineseStandard/T82.1-94and (JB/T82.2-94) Chinese Mechanical Standard

SeeFig.5-1andTab.5-2:forthespecificassemblysizes:Tab.5-2 PN4.0 Flange Size

DN d1D

D1 D2 bScrew hole In-line Flange

Inserted DepthFlange theo-retic weightJB GB Diameter Quantity Bolt

80 78 195 200 160 120 24 18 8 M16 50 100 150 5.02kg100 96 230 235 190 149 26 22 8 M20 50 100 150 7.63kg

Fig.5-1

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5.2.1.5 Mounting PositionFlange Level transmitter is directly mounted onto the box body or

potwallinflangeform.Asthepressurediaphragmisintheverticalpo-sition, the possible zero change occurred is the maximum 28mmH2O. As the diaphragm is in horizontal position, the zero point change is less than 100mmH2O (An additional length variation is needed for the in-lineflange)withno influenceontherangethough.Thiserrorcanbeeliminated through calibration.5.2.2 Remote Flange Differential Pressure/ Pressure Transmitter5.2.2.1RangeofMeasurement:DifferentialPressure:0 - 1.2kPa - 2.5MPa（0 - 120mmH2O - 250000mmH2O）

Pressure:0 - 6kPa - 10MPa（0 - 600mmH2O - 1000000mmH2O）

5.2.2.2 Working Pressure (Static Pressure)0.1-4MPa5.2.2.3 ModelSee Table 5-3 for the models of the Remote Flange Differential

Transmitter Table 5-3

No. Name Model RangeRating working

pressure(MPa)

1Double-flatflange

differential pressure transmitter

SSTCC-4422 0-6-40kPa 42 SSTCC-4522 0-30-180kPa 43 SSTCC-4622 0-0.16-1MPa 44 SSTCC-4722 0-0.4-2.5MPa 45

Double-in-lineflangedifferential pressure

transmitter

SSTCC-4442 0-6-40kPa 46 SSTCC-4542 0-30-180kPa 47 SSTCC-4642 0-0.16-1MPa 48 SSTCC-4742 0-0.4-2.5MPa 4

Note:single-flatandsingle-in-linetypesarenotlistedinthetable

PN100-DN65 (only used for SSTYC-1812, 1832)

Remotecapillarylength:1.5m–13m

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5.2.2.4 Mounting SizeAllRemoteFlangeTransmittershavetheflanges.SeeFig.5-2and

Tab.5-4 for PU mounting sizes.Fig. 5-2

PN DN d1 D D1 D2 bScrew hole

Inserting DepthDiameter Quantity Bolt

4.0 80 78 200 160 120 24 18 8 M16 50 100 1504.0 100 96 235 190 149 26 22 8 M20 50 100 150

10.0 65 62 220 170 138 32 26 8 M24 50 100 150

Tab.5-4

5.2.2.5 Mounting PositionIn mounting the remote flange transmitter, there are some limita-

tions in the height difference between the pressure transmitter and the flange,andtheheightdifferencebetweenthetwoflangesofdifferentialpressure transmitter. See Tab.5-5 for details.

Tab.5-5

Range No.Allowed Deviation of Height (m)

Silicone Oil Fluorine Oil4 3.84 1.895 19.2 9.48

6.7.8 Not applicable for this limitation

Asthepressuretransmitterandflangeorthe2flangesofdifferentialpressure transmitter are not at the same height, zero point changes mayoccurresultingfromthefluidbaractioninsidetheremotecapillary.So zero point calibration should be done again after mounting.

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5.2.2.6 Changes in the tested agent temperature and environment will result in the zero point shift of transmitter, which can be diminished bytheuseofthefollowingmountingmethod:

1. Avoid the sunshine directly reflecting on the transmitter and remote devices;

2. Regulate the zero point along with the change of seasons;3. Maintain a constant temperature of remote capillary.

5.3 Calibration of Instrument

The calibration of flange transmitter is basically same to the gen-eral transmitter, except the device needed for the sealed linkage with flange.Thisconsequentlydeterminesthetestedstandardpressure.

5.4 Usage of Instrument5.4.1 Flange Level Transmitter

In the use of Flange Fluid Level Transmitter, it should be noted that aflat-flangefluidleveltransmitterisforthegeneralviscidagent;andfortheagentwithastrongviscosity,itisrequiredtousethein-lineflangefluid level transmitter. Inmounting, themeasurementdiaphragmmustbe deep inside the internal wall of the tower, at least tangent to the in-sidewall.Ifthetestedagenthasalargerflowingspeedandastrongergrinding capacity, it is likely to wear the isolating diaphragm. So the corresponding measures need to be adopted before use. Single-flat and single-insert flange level transmitters have the same method of calculation in measurement.

5.4.1.1Usagewithouttransfer:(SeeFig.5-3)

The instrument is mounted onto the identical horizontal height of the lowestfluid level. Inthemeasurementofbreachedcontainers, the in-strument gets its negative pressure diaphragm access to atmosphere. In measuring the sealed containers, the upper part of the container gets access to the diaphragm of the negative side. If the negative pressure can keep dry, it has no need to mount the condensate pot. Otherwise,

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acondensatepotisneededandthecondensatefluidisdischargedona regular basis. In discharge, close the normally open-valve to avoid the transmitter bearing the single-direction pressure.

Fig. 5-3 Level Measurement Without ShiftHighest Fluid Level

Lowest Fluid Level

Transmitter

H L

Transmitter

H L

5.4.1.2 Usage With Negative Transfer (See Fig. 4)If it is not convenient to mount a condensate pot, or for the purpose

of isolating the corrosive agent from entering the negative pressure side,theisolatingfluidcanbeusedasindicatedinFig.4.Undersuchcircumstance,thepressuredifferencetheinstrumenthas:ΔP=r1(H+H0)-r2h=r1H-(r2h-r1H0)TransferAmount:B=r2h-r1H0

Range:P=r

ForInstance:fortheknownr1=1.4g/cm3, r2=0.89g/cm3

H=500mm,H0=100mm,h=1700mmRange:(formulaomitted)ΔP=r1·1=1.4×500=2100（mmH2O）

NegativeTransferAmount: (formulaomitted)B=r2h-r1h0=0.8×700-1.4×100=1220(mmH20)Beforemounting,rangeisrequiredtoregulateto–1220–880(mmH2O)

Condensate pot

Open-valve

Close-valve

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H

H0

Highest Fluid Level

Lowest Fluid Level

Mounting Line

hr2

r1

Hr1

hr2-Hr1

o

Output 100%

H

H0

a:opencontainerbsealedcontainer

r1---Tested Agent Proportion r2--- Isolating Fluid Proportion h---Isolating Height H---level range H0----constantfluidlevelheight

Fig. 5-4 Fluid Level measurement Method With Isolating Fluid5.4.1.3 Usage Of Instrument With Positive Transfer (see Fig. 5-4)

Inthecaseoftheinstrumentbeingmountedbelowthelowestfluidlevel, the usage is indicated as Fig. 5-5

Transmitter

H L

Fig. 5-5 Use Positive Transfer to Enhance the Sensitivity of Measurement

Highest Fluid Level

Lowest Fluid Level

Transmitter

H L

Transmitter

H LNormally Open-Valve

Normally Close-Valve

Mounting Line

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H1

H

H0

H2

H L

r2

r1Highest interface

Normal interface

Lowest interface

DifferentialPressure:ΔP=(H0+H)rPositiveShiftAmount:A=H0rForexample:testedagentproportionr=1.1g/cm3,H=910mm,H0=820mmRange:P=H•r=910×1.1=1001≈1000mmH2OPositiveTransferAmount:A=H0r=820×1.1=902≈900mmH2OBeforemounting, it isrequiredtoregulatetherangeto900–1900

mmH2O

5.4.1.4MeasurementofFluidinterface:(SeeFig.5-6)Ifthefluidhasastrongerviscosityinthelowerpartofcontainer,and

liable tocrystallize,whereasupperfluiddoesn’tgetcrystallizedandhave no sediments, it is recommended to use single-flat flange fluid level transmitter for the measurement of interface.

Fig.5-6usesingle-flatflangefluidleveltransmittertomeasureinterface

PressuretoPositiveSide:PH=r1(H1+H-H2)+r2(H2+H0)PressuretoNegativeSide:PL=r1(H1+H+H0)DifferentialPressure:ΔP=PH-PL=(r2-r1)H0+(r2-r1)H2

PositiveTransferAmount:A=(r2-r1)H0

Range:P=(r2-r1)HRange=P=(r2-r1)H

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Fluid Level Constant tempera-ture layer

3 3 3

hH

H0

14

L H

5

4

1

24

5

4

1

L H

5

4

42

2

L H

For the measurement of those with a strong viscosity, liable to sedi-mentorfloatingcharacteristic,useSSTCCsingle-in-lineflangetrans-mitter as indicated in Fig. 5-7.

Fig. 5-75.4.2 Remote Flange Transmitter5.4.2.1 some agents would get crystallized as inducted with a con-

stant temperature pressure conduit. In such a case, it is recommended touseadouble-flangedifferentialpressuretransmittertodothemea-surement. Depending on the crystallized degrees of different agents, thefollowingmethodscanbeadoptedrespectively:

a. Double-flatflangetransmitterb. One-flat&one-insertflangetransmitterc. Double-insertflangetransmitter,AsindicatedinFig.5-8

Fluid LevelIsolating

Fluid

Transmitter

H L

Transmitter

H L

a.Double-flatflangeb.One-flat&one-in-sertflangec.Double-indrtyflangeH-fluidlevelvariedscopeH0-constantfluidlevelheightK-flangebreachedheight1.Flatremote2.In-lineremoteflange3.Constanttemperaturelayer4.Capillary5.Transmitter

Fig. 5-8

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Duetotheheightdifferencebetweentwoflangesinmounting,itisrequired to add transfer amount in regulating. Negative pressure re-moteflangeaddsthenegativetransferatitsupperpartwiththecalcu-lationmethodasfollows:

Range:P=rNegativetransfer:B=r0h - rH0Where:r--testedagentproportion0--silicone oil proportion 0.97g/cm3

Forexample:fortheknownH=800m,H0=250mm,h=1300mm,r=1.2g/cm3

Range:P=r·H=1.2×800=960mmH2ONegativeTransferamount:B=r0h-rH0=0.97×1300-1.2×250=961≈

960mmH2OBeforemounting,itisrequiredtoregulatetherangeto–960-0mm-

H2O

5.4.2.2 Fluid interface MeasurementPressuretopositiveside:PH=r1(H0+H1+H-H2)+r2(H2+h0)Pressuretonegativeside:PL=r1H0+r0(H1+H+h0)Differentialpressure:ΔP=PH-PL=r1(H1+H)+r2h0-r(H1+H+h0)+(r2-r2)H2

Transferamount:B=r1(H1+H)+r2h0-r0(H1+H+h0)Range:P=(r2-r2)HWhere:r0—silicone oil proportion H---height of the highest interface

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H0

H1

HH2

h0

h

r1

r2

L H

(r2-r1)H

Negative transfer amount

Input differen-tial pressure

mmH2O

Output

100%

BDouble-flange

HL

H L

Throttling device

Fig.5-9usedoubleflangetransmittertomeasureinterface

5.4.2.3 Use Double Flange Differential Pressure Transmitter To Mea-sure Flow

For the agents unable to induct with pressure conduit, the double-flange differential pressure transmitter can be used to measure the flow, as indicated in Fig. 5-10. In measuring horizontal conduit, both flangesatthesamehorizontalhavenofluidleveldifferencewithoutthetransfer being involved. In measuring vertical conduit, it will bear all the timethefluidpressuredifferenceof(r - r0)H. So the instrument should have the positive transfer amount of (r - r0)H.

Fig. 5-10 Instrument Maintenance

Thro

ttlin

g de

vice

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5.5 Instrument Maintenance5.5.1therearefillfluid insidethetransmissionpressuresystemof

theflangetransmitter.Eitherthepositiveandnegativesidescannotbereleasedordismantled,ortheywillbefailurefortheleakageoffillfluid;

5.5.2 after instrument is in operation, the regular check should be done for the basic characteristic, calibrate the zero point with the sea-sons, then change the failure sealing elements, etc.

5.5.3 incleansingtheflange,payattentionnot toscratch it,or theinstrument would get failure.

Fault symptom Cause Treatment

No output

1. Pressure failing to induct into

transmitter

Check if the pressure conduit assembly is correct,

and the valves are in a normal valve; pressure con-

duitisjammed.

2 incorrect power voltage and load

resistance

See Instructions for SSTYC and SSTCC Differential

Pressure/ Pressure Transmitter

3, wrong polarity of power Rectified

4. Output loop breaks off Get access

Big error, output as

high as 100% or

0%

1. Jams in pressure conduit, pres-

sure valve or blow & wash valve

All the conduits are smooth, and all valves are in a

normal working state; all conduit connectors should

be in a sealed state.

2. Measurement loop incorrect

Check the connection wires between distributor and

secondary instrument and transmitter; If the working

state is in normal state and remove the troubles.

3.Zero point, range and linear Change the damaged elements and recalibrate it.

4. Positive and negative transfer

switch position error

Rectified

5.5.4 Troubleshooting of Flange Transmitter5.6 Instructions for Order

5.6.1Corrosion-proofOption:Depending on the different corrosion mediums, the isolating dia-

phragm and pressure transmission diaphragm of the transmitter can be made of the materials such as 316L, Hastelloy C-276, Monel K-500, Hastelloy D-2 and 3YC25 ; diaphragm board, connector, vent/drain valve and inserting canister as well as other structural materials touch-ing the agents can be made of Mo2Ti (3YC-20) (0Cr17Ni12Mo2Ti)AI

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Model

SSTCCSSTYC

— □ —i d—DN □ — □ — □

SI(316L), 316L, Hastelloy C, Monel, etc. In selection, the models are listed as per the material combination regulated in Table 5-6 and the corresponding corrosion-proof footnoted code. See Tab. 5-6.

Corrosion-

proof footnoted

code

Structural material

Structural pieces touching agents

Pressure transmis-sion diaphragm Isolating saddle Assemblyflange

No footnoted Mo2Ti(316) Mo2Ti(316) Mo2Ti(316) 1Cr18Ni9Ti

F13 316L Hastelloy c-276 Mo2Ti(316) 1Cr18Ni9TiF14 316L MonelK-500 Mo2Ti(316) 1Cr18Ni9TiF15 316L Tantalum (Ta) Mo2Ti(316) 1Cr18Ni9TiF22 316L 316L Mo2Ti(316) 1Cr18Ni9TiF23 316L Hastelloy c-276 Mo2Ti(316) 1Cr18Ni9TiF24 316L MonelK-500 Mo2Ti(316) 1Cr18Ni9TiF25 316L Tantalum (Ta) Mo2Ti(316) 1Cr18Ni9TiF26 316L Hastelloy B-2 Mo2Ti(316) 1Cr18Ni9TiF33 Hastelloy C Hastelloycc-276 Mo2Ti(316) 1Cr18Ni9TiF35 Hastelloy C Tantalum (Ta) Mo2Ti(316) 1Cr18Ni9TiF44 Monel MonelK-500 Mo2Ti(316) 1Cr18Ni9TiF47 Monel 3YC25 Mo2Ti(316) 1Cr18Ni9Ti

Table 5-65.6.2CompleteFlangeTransmitterModel:

Intrinsically safety type

Explosion-proof Type

Flange diameter (mm)

Capillary length (mm)

Inserting depth (mm)It can be omitted in case of no requirements for the above parts.5.6.3OtherRequirements:

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FlangeTransmitterisfilledwithfluorineoil,noneedofon-sitemeterhead, etc.

5.6.4MentionUnnoted:

① Fortheunnotedflangenominaldiameter:ProvidedasDN80;

② Fortheunnotedinsertingflangedepth:Providedas150mm;

③ For theunnotedremotecapillary length:Providedas3.5m.ppendix

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User’s Manual for SST Digital•Intelligent Pressure / Differential Pressure TransmitterAppendix

A.1 Model CompositionThe transmitter produced by our company includes the full series

range and special structure, with the model composition as the follow-ingdiagram:

Note:Theusersarerecommendedtouse in theaboveranges,andadopt100:1intheextremestate.Thecompressedrangeadoptsthefollowingformulatocalculateitsprecision:

Rating Range0.05+ (0.05×---------------------------------------------------------------) % F.S

SettingRange–ZeroPointTransferAmount

SSTYC- Capacitance Type Pressure TransmitterSSTCC- Capacitance Type Differential Pressure Transmitter

0 Negative pressure

1Gage pressure (for the range 1, 2, the differential pressure static pressure is 0.4Mpa)

2 Absolute pressure3 Differential pressure static pressure 2.5Mpa4 Differential pressure static pressure 4Mpa5 Differential pressure static pressure 6.4Mpa6 Differential pressure static pressure 16Mpa7 Differential pressure static pressure 25Mpa8 Differential pressure static pressure 32Mpa9 Differential pressure static pressure 40Mpa

1 0-0.06-0.3kPa2 0-0.25-1.5kPa3 0-1.2-10kPa4 0-6-40kPa5 0-30-180kPa6 0-160-1000kPa7 0-400-2500kPa8 0-1600-8000kPa9 0-4000-25000kPa0 0-7000-40000kPa

0 standard type1 single-flatflangetype2 double-flatflangetype3 single-insertflangetype4 double-insertflangetype5 one-flat&one-insertflangetype

2High-grade Intelligent Type (full-digital sensor, self-equipped communications keyboard)

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Code M e a n i n gM3 Digital LCD meter headE1 Common cable connectorE2 Explosion-proof cable connectorB1 Conduit assembly curve bracketB2 Plate assembly curve bracketB3 Conduit assembly curve bracketG1 KidneyflangeG2 Welded pipe connectorG3 Integrated 3-valve group

i intrinsically safety typed Isolating explosionH 4-20mA DC/HART protocol digital communicationsG ≤200℃ (high temperature silicone oil)F ≤398℃(hightemperaturefluorineoil)

Standard

Type

Corrosion-proof material

Structural MateriaFlange connector Vent/drain valve Isolating diaphragm

F12 Carbon steel 316 316LF13 Carbon steel Hastelloy C Hastelloy C-276F14 Carbon steel Monel Monel K-500F15 Carbon steel 316L TaF22 316L 316L 316LF23 316L 316L Hastelloy C-276F24 316L 316L Monel K-500F25 316L 316L TaF26 316L 316L 哈氏 B-2F33 Hastelloy C Hastelloy C Hastelloy C-276F35 Hastelloy C Hastelloy C TaF44 Monel Monel Monel K-500F47 Monel Monel 3YC25

A.2 Accessories and Material Code

Note:M3,F22,4-20mAandDC/RS485digitalcommunicationsarethestandardizedconfiguration

The quality inspection department of national explosion-proof prod-ucts, according to G83836, 1-2000, GB 3836 and 4-2000 standards, verifiestheexplosion-proof typesofproducts in theabovetable.Theexplosion-proof sign is Exia IICT5, applicable for Zone 0,1,2 explosion hazard occasions where contain the explosive gas mixtures of T1-T5 temperature groups containing theclassifiedIIA–IIC.

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15 20 25 30 35 40 45 500

200

400

600

800

1000

1200

1400

1600

Load

R (o

hm)

250 ohm Load

Power Voltage U(V)Standard 24V DC

A.3 Functional IndicesA.3.1 Technical Indices of SST Series Digital•Intelligent Pres-sure/Differential Pressure TransmitterFunctionalSpecifications(Referenceconditions:no-transferstate,SiliconeOilFillFluid,316LIsolating Diaphragm) OutputSignal:4-20mADC/RS485Digitalcommunication 4-20mA DC/HART Protocol digital communications (op-tional)TransmissionMode:2-wireLoadCharacteristicChart:

Precision:LinearOutput:±0.075 -±0.1%(Rangeability is1:1), including the

linear, differential and repeated errors)SquareRootOutput:Attheoutputpressureof4–100%,thevalue

is±(0.2%markedrange+theupperlimitof0.05%)Stability:forDPCode3,4and5,itis±0.2%ofthemaximumrange,

forothercodes,±0.25%ofthemaximumrange.Humidity:relativehumidity0- 100%StartupTime:attheminimumdamping,within2sec.Cubageabsorbingamount:lessthan0.16cm3

Damping:electricaldampingis0-32Sec.In addition, the sensor has an extra 0.2 sec invariable damping time

(0.4 sec for range 3).

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Static Pressure effect (DP transmitter)ZeroError:asfor14MPa,itis±0.25%inthemaximum;Fortherangecode 3, ±0.5% of the maximum. It can be calibrated through zero point adjustment.RangeError: itcanbecalibrated to±0.25%of the input reading foreach6Mpa;or forrangecode3, it is±0.5%.Thiserrorcanbeelimi-nated before amounting.Static Pressure effect (HP transmitter)ZeroError:asfor32MPa, it is±1.0%inthemaximum;Itcanbecali-bratedthroughzeropointadjustment.Temperature Effect· Zeropointerroratthemaximumrange:

For each 56℃, it is±0.5%oftherange.Theoveralleffectincludesrangeerrorandzeropointerror:foreach56℃ ,itis±1.0%oftherange.For range No. 3, the effect is doubled.· Zeropointerrorattheminimumrange:

For each 56℃, it is±3.0%oftherange.Theoveralleffectincludesrangeerrorandzeropointerror:foreach56℃ ,itis±3.5%oftherange.For range No. 3, the effect is doubled.VibrationEffect:atafrequencyof0–200Hz,eachgonanydirectionsistheupperlimitvalueof±0.05%.PowerEffect:lessthan0.005%/VofmarkedrangeMountingpositioneffect:zeropointexcursionnotmorethan(0.25kPa),Thiserrorcanbeeliminatedwithnoinfluenceontherange.Electromagneticdisturbance/radioactivefrequencyeffect:testisdoneaccording to SAMA PMC33.1 in the range of 20~1000 MHz, the mag-netic strength can be as high as 30V/m.StructuralSpecifications:Note:Fortheadaptabilityofmaterial,seeA.2AccessoriesandMaterialMode.MaterialsTouchingAgents:Isolatingdiaphragm:316Lstainlesssteel,HastelloyC-276,Monelalloyor Tantalum (optional)Vent/drainvalve:316stainlesssteel,HastelloyC-276,MonelalloyorTantalum

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TechnicFlangeandConnector:316stainlesssteel,HastelloyC-276,Monel alloy or Tantalum O-ringtouchingagents:fluorinerubber,Buna-Nrubber(optional)· Fillfluid:SiliconeOil· Bolt:carbonsteelplatedwithcadmium· O-ringsealing:Buna-Nrubber,fluorinerubber(optional)· Painting:polyurethane

TechnicConnector:forthetransmitterswithrangeNo.3,4and5,thecenterconnectionholesdistancebetweentwoflangesis54mm,withthe upper hole part of NPT1/4-18; for the transmitters with range No. 6and 7, they 56mm and NPT1/4-18; for range No.8, they are 57.2mm and NPT1/4-18.

For the transmitters with range No. 3,4 and 5, pressure-introducing hole of the 2 connectors is NPT1/4-14, the flange connector can be turn over to have the center distances of respective 50.8mm, 54mm or 57.2mm.

ElectricalConnectors:withtheterminalsforon-sitetestWeight:excludingoptionalpieces,AP,DP,GPandHPweighsrespec-tively 2.4 kg.

A.3.2UsageConditions:PowerSupply:

16V-48V DC intrinsically safety type explosion-proof products are required to get a power supply from the corresponding safe barrier (Standard 24 VDC)Using Environment Of ProductUsingTemperature:-20℃ - +80℃StorageTemperature:-40℃ - +104℃Humidity:0- 90%Usingenvironmentconditionsforexplosion-proofproduct:Humidity:-20℃ - +40℃RelativeHumidity:5%- 95%AtmospherePressure:86- -106kPa

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Parametersforintrinsicallysafetytypeoutsourcingsafebarrier:U0≤28VDC,I0≤30mA,P0≤0.84W

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CodeMinimum measurement

range

Maximum measurement

range

Precision

rating

SST

2001

01 0-3kPa 0-10kPa ±0.25%

02 0-10kPa 0-35kPa ±0.1%

03 0-35kPa 0-100kPa ±0.1%

04 0-100kPa 0-200kPa ±0.1%

05 0-200kPa 0-700kPa ±0.1%

06 0-700kPa 0-1.7MPa ±0.1%

07 0-1.7MPa 0-3.5MPa ±0.1%

08 0-3.5MPa 0-7.0MPa ±0.1%

09 0-7.0MPa 0-35MPa ±0.1%

10 0-35MPa 0-60MPa ±0.1%

SST

2318

02 0-1m 0-3.5m ±0.1%

03 0-3.5m 0-10m ±0.1%

04 0-10m 0-15m ±0.1%

A.3.3 Functional Indices for SST Series Digital•Intelligent direct-coupled Pressure/ Level Transmitter

Table1:RangeandPrecisionRating

Maximumoverload:2timesoftheupperlimitvalueofthemaximum measurement scope Where:fortheproductwiththeCodeNo.10,the maximum overload is 70 MpaOver-PressureEffect:lessthan0.25%ofthemaximumrangeMeasurementagent:allkindsofagentsmatchedwithstainlesssteel316Output:4-20mADC(2-wire)WorkingVoltage:14-36VDC,standard24VDC±5% with ripples less than 1%EnvironmentTemperature:-20-85℃AgentTemperature:-25-100℃StorageTemperature:-40-125℃RelativeTemperature:0-100%DiaphragmMaterial:stainlesssteel316probe/connectormaterial:1Cr18Ni9TiElectronicHousing:aluminumalloy(spaypaintedwithplastic)ProcessPort:M20×1.5orNPT1/2 outer screw (SST2001)

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10 15 20 25 30 35 40 45 500

200

400

600

800

1000

1200

1400

1600

1800

Load

R (o

hm)

250 ohm Load

Power Voltage U(V)Standard 24V DC

ElectricalPort: :NPT1/2 loadresistanceofcablesealedconnector:(4-20mA):

Where:Uispowervoltage,RD is cable internal resistance

R= -RD

Load Resistance(0-10mA):≤1kΩLoad Resistance(0-5V):≥300ΩInsulatingResistance:≥200MΩ/50VDCZeroPointTransfer:0%-+100%(SST2318 is 80%) of the maximum rangeNegativeTransfer(SST2001):0%--100% of the maximum range (no morethan–100kPa,absolutepressurehasnonegativetransfer)PowerChangeEffect:lessthan0.01%/VofoutputrangeLoadChangeEffect:canbeignoredwiththeminimumvoltageguaran-teedZeroTemperatureCoefficient:±1.5%FSSensitivityTemperatureCoefficient:±1.5%FSIndicator:0-100%linearmarks/digitaldisplaymeterheadStability:±0.2%FS/yearExplosionSignofIntrinsicallySafetyTypeProduct:ExiaIICT5Weight:about0.75kg(varieswithdifferenttypes)

U-140.02

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A.4 Accessories

Our digital•intelligent transmitter is attached with the following acces-sories for the user’s convenience.

User’sManual1copyQualificationCertificate1copyMounting Bracket 1 set M10 Bolt 4 pieces

(Note:direct-coupled isnotattachedwithmountingbracketandM10bolts)

A.5 Precautions

1. Correctly wiring as per the requirements described in the instruc-tions2. This product is precise measuring instrument. Do not beat it, strike it, or forcedly bind it, nor dismantle it, thrust the pressure introducing hole or metal diaphragm with sharp articles.3. The transmitter should be mounted in a place where is ventilated, dry, free from corrosion and cool.4. If the measurement agent is a viscid fluid or the one with float-ing granules, avoid the diaphragm being struck and the probe being jammed.5. It is prohibited that the system is overloaded, exceeding the limita-tion stipulated in the instruction.6. Keep the cable connector being sealed to avoid letting in the water or humidity, which may affect the integral performance and longevity.7. In the case of abnormal output, shut down the transmitter for a check. If it is due to the product quality problem, please bring the prod-uctwiththequalificationcertificatebacktoourcompanyforamainte-nance or change.8. With the constant improvement of the product technology, no separate notice will be given concerning the alternation of product per-formance.

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CHONGQING WECAN PRECISION INSTRUMENTS CO., LTD. WILL ENJOY THE RIGHT OF FINAL EXPLANATION FOR THIS

INSTRUCTION.

ProductionLicense:

量制渝制 :00000398

Chongqing WECAN Precision Instruments Co., Ltd.

Address:62#,XingguangAvenue,Gaoxinyuan,Beibuxinqu,Chongqing,P.R.C

Tel:+86-023-67509200Fax:+86-023-67509300

PostCode:401121SalesServiceHotline:800-8070328

Http://www.wecankj.com.cn

E-mail:[email protected]

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