VORTEX FLOWMETER USER MANUAL
Contents
1. make sure the flow direction arrow on the shell is in accordance with the flow direction in the pipeline C After welding flange clean the pipeline make sure there are no impurities like welding slag in the pipeline D Before mounting transducer make sure a sealing washer is put in the groove of the flange 5 3 The outline dimensional drawing of transducer fig 3 and table 5 for reference when mounting connecting Wire Am _ defector amplifier joint lever transducer shell mortise dedicated flange Table 5 The outline dimension of general instrument DN BO CO DO HO matched with seamless steel tube 15 65 101 125 422 b18X1 5 20 65 101 125 422 426X3 25 65 101 125 422 432X3 5 32 70 110 145 427 p 38X4 40 75 115 145 427 D45X2 5 50 75 117 160 435 p 57X35 65 75 123 180 445 Dd 73 X4 80 84 132 296 450 689 X 4 5 100 90 138 230 474 p 1084 125 100 152 245 482 p 133 X4 5 150 120 174 280 499 o159X4 5 200 150 206 336 526 6219X9 250 160 216 406 563 273 X 10 300 170 228 460 590 4 325X12 5 4 When transducer along with pressure transmitter and temperature transmitter constitutes a measuring system the selection of pressure and temperature measuring point refer to the following fig 5 4 1 The installation of pressure transmitter A Open a pressure transmitting hole around 12 at the certain spot on the pipe given in fig 6 B Weld pressure transmi2. Converging pipe The length of straight pipe should be 2 15D for upstream and 25D for downstream if converging pipe gt 15 is installed in the upstream of transducer installation site upstream dg downstream 2 Diverging pipe The length of straight pipe should be gt 18D for upstream and 2 5D for downstream if diverging pipe gt 15 is installed in the upstream of transducer installation site 3 90 elbow or T joint The length of straight pipe should be 220D for upstream and gt 5D for downstream if a 90 elbow or T joint is installed in the upstream of transducer installation site 20DN SDN 4 Two 90 elbow are on the same plane The length of straight pipe should be 225D for upstream and 5D for downstream if two 90 elbow are on the same plane in upstream 5 Two 90 elbow are on different plane The length of straight pipe should be 240D for upstream and 5D for downstream if two 90 elbow are on different plane in upstream 6 Control valve Flow or pressure control valve should be installed at least 5D away from the meter if the valves must be installed in upstream the length of straight pipe should be 2 50D for upstream and 25D for downstream 7 Rectifier The length of straight pipe should be 2 8D for upstream and 2 5D for downstream if a rectifier is installed in upstream 5 2 Installation notes A When welding flange with straight pipe demount transducer B When mounting transducer
3. confirm the transducer diameter In this case flow range can be confirmed in the following way A lower limit flow value According to the lower limit flow Omin fiducial medium density p o the density of gas medium is 1 293Kg m and liquid medium 1000Kg m and the measuring medium density p given in table 1 the lower limit flow Qmin can be worked out through the formula given below Qmino Omin X P 0 8 m3 h According to kinematic viscosity of medium V the lower limit flow Qmin can be worked out through the formula given below Ominv 6VD X 10 m h Thereinto D pipe inside diameter mm Compare Qmin and Qminv choose the higher value as the lower limit flow value of certain type of flowmeter B upper limit flow value Generally the upper limit flow value of liquid is 9m s gas 80m s and steam 90m s 4 2 Confirm the suitable configuration A Choose the right type remote transmission or local display B For remote transmission type if the fluid is saturated steam choose automatic temperature compensation density if the fluid is superheated steam choose temperature and pressure compensation density for other medium whether compensation is needed or not depend on the practical situation if the accuracy requirement is low and temperature or pressure is constant choose fixed pressure or fixed temperature compensation fixed density compensation is also suitable C For intelligent flow totalizer if display
4. display of intelligent flow totalizer A Make sure there is flow in the pipeline and the flow value is higher than the lower limit of measurable flow B Check if there are any misconnections or brokens of wire the basic method is to check the wire or beat the pipeline with a hammer or stick adjust the totalizer to display frequency to see if there is frequency displayed if there is then no wire misconnection if not check the wire C Check the amplifier remove the probe wire from amplify board to see if there is output from transducer or 50Hz frequency display of intelligent flow totalizer if not change the amplify board if there is then the amplifier is well functioning D Check the transducer remove the two lead wires of transducer from amplify board use a multimeter to measure the resistance between the two lead wires and the respective resistance of them both of which should be more than 2M 2 otherwise the transducer should be replaced E If there is nothing wrong with transducer check if the pressure transmitter and platinum thermal resistor are damaged If the display of pressure and temperature of the intelligent flow totalizer is normal then the totlizer is probably damaged Malfunction 2 There is no flow in the pipeline yet there is output from transducer and display of totalizer A Check if the vibration of the transducer installation site is overlarge if it is a shock strut should be considered to be mounted
5. requirement is only for flow pressure temperature etc choose nixie tube display or LCD intelligent totalizer if memory function is needed to chasing historical data choose intelligent flow totalizer paperless recorder D Whichever type of intelligent flow totalizer is chosen a RS485 or RS232 communication interface should be considered to be installed E Whichever type of intelligent flow totalizer is chosen a back up power should be considered to be deployed in order to keep the instrument properly functioning when there is a power failure the working life varies with different configuration normally 24 48 hours or above F When choosing intelligent flow totalizer an instrument box should be considered to be provided to put the intelligent flow totalizer in to avoid the set parameter being randomly adjusted G When choosing remote transmission type a wireless remote flow monitoring system should be considered to be applied to realize real time monitoring and management of flow in each pipeline H If the measured medium is explosive and flammable material or there is explosive and flammable gas in the measuring environment explosion proof transducer and measuring system should be applied 4 3 The calculation of transducer pressure loss After confirming the transducer diameter the transducer pressure loss can be worked out to figure out whether transducer has a impact on process pipeline The formula is as below P lt 1 2 p
6. A En a NOMSSOEDOSEE Ou io ko fan ka f w on s foi oe Po NEMAD DODIRDE SOC Scr er SE MEIE a a EEE pe fof faa an a a faa 05 ee ou fe sis ae a L jape pe ef 2 fof at at a e a o fe a pe Jamese KEE TTT EE Remark If the density value is between any two values in the table use interpolation to work it out 16 Table 3 The measuring range of liquid and gas f Liquid Gas Liquid Gas Nominal E Nominal A i A Measuring Measuring A Measuring Measuring Diameter mm Diameter mm range range range range 15 0 25 5 00 4 0 50 0 125 10 0 400 133 4000 20 0 33 10 0 5 0 60 0 150 15 0 600 200 6000 25 0 40 16 0 6 0 160 200 25 0 1000 333 10000 32 0 63 25 0 10 0 250 250 40 0 1600 533 16000 40 1 00 40 0 16 0 400 300 580 0 2000 666 20000 50 1 50 60 0 25 0 600 350 75 0 3000 1000 30000 65 2 50 100 40 0 1000 400 1400 4000 1330 40000 80 4 00 160 60 0 1600 450 125 5000 1660 50000 100 6 00 250 80 0 2500 500 150 6000 2000 60000 Remark Reference fluid Liquid normal temperature water t 20 C p 1000kg m Gas normal temperature and pressure air t 20 C p 0 1MPa p 1 025kg m Table 4 Density ofcommon gas Gas Name Ji aa Gas Name e gon 760mmHg 760mmHg 0 760mmHg 760mmHg 0 air 1 2928 1 205 ethyne 0 1717 1 091 nitro
7. B Bad grounding of instrument brings interference C Eliminate it from the setting of small signal elimination D Please contact our technical department to solve other kinds of malfunctions Malfunction 3 The flow in pipeline is normal yet the display of instrument shows a big wave of flow value A Wrong or inappropriate installation B Unsuitable trigger sensitivity or gain adjustment of amplifier adjust the dial switch 9 Intelligent flow totalizer According to customer s needs we provid many kinds of flow totalizer along with transducer such as nixie tube display intelligent flow totalizer LCD intelligent flow totalizer intelligent flow totalizer paperless recorder etc back up power supply and wall mounted instrument box are also available for special need The main features of the totalizers are as follow 12 10 e Measuring accuracy better than 0 2 for analog quantity and better than 0 2 for frequency quantity e Flow signal can be frequency or standard current Able to display cumulative flow instantaneous flow differential pressure frequency density pressure temperature the current time andthe duration of power failure e Realize automatic temperature compensation density automatic pressure compensation density and temperature and pressure compensation density e RS485 or RS232 communication interface are available possess lightning protection function e Able to work with micro dot matrix pri
8. Kaifeng Kaide Flow Instrument Co Ltd No2 Indusrtial Road Huanglong Industrial Park Kaifeng County Henan China Tel 86 378 3212788 Fax 86 378 6682432 Mi VORTEX FLOWMETER USER MANUAL CONTENTS 1 Introduction cis n e ko ee ea ee ko a ee aa kaa on 3 2 Measuring prin CiplE 49th aeeaeee rese ae sen sens on sese an tenten sanson santan se sea teen tanmen onn on son 3 3 Technical parameters eette sesa san ennan santan ea te santan onn ons man onn onn 3 4 Lectotype instruCtiQON eerte rene tan onn on tanm ons e anonse season 4 AN ect tre rere trie Rare T pense tas koda ko kana konpa pie ko pl wan p e kkk a 4 4 2 Confirm the suitable COnfiguratiOn 096 atenn ene eee nesese sante sanson sese non san ansan ansasen on san onsanonon 5 4 3 The calculation of transducer pressure 088110000 00006 90aeeensasansasen se senonsan ansan on sesononoanoananonon 5 4 4 Liquid phase guaranteed 0090 at annee ensanse se sese asasen san ansasen on so non nan ousa son oason ennan anne son on sononnon 6 4 5 Example of diameter selection 14000999 nan ene aesee sese sasan sa sese sese san on sa sense son onsanonoasonoasonnnn 6 5 Installation method and steps eerie 6 5 1 Choose the right installation siterte ee een ee teren asasen sanson sasa oa sanson san on na sonoasanonsanonnn 6 s Tastallation notes i a E es n af kesta alamaa aka iha nue a ek e 8 5 3 The outline dimensional drawing of transducer for reference when mounting vese 8 5 4 The selection of
9. V Thereinto A P transducer pressure loss Pa p fluid density Kg m V the average velocity of fluid 4 4 Liquid phase guaranteed In order to avoid vaporization or gas etching the fluid pressure of the flowmeter should meet the requirement of the following formula P gt 2 6 A p 1 25Ps Thereinto Ps the saturated steam pressure of the liguid which correspond with certain temperature KPa P pressure of the fluid Pa 4 5 Example of diameter selection Eg 1 The inside diameter of process pipeline is DN100 medium is saturated steam steam consumption is around 0 5t h 3t h instrument pressure is 0 4MPa please confirm the proper instrument diameter Solution From instrument pressure 0 4MPa we know the absolute pressure is 0 5MPa look up table 2 to find out the temperature is 152 C As flow range of DN100 is 0 4 3 5t h totally meet the operating requirement a vortex flow transducer with a diameter of DN100 should be chosen here If the steam consumption is around 0 3t h 2t h choose the ones with a diameter of DN80 the process pipeline diameter should be deducted from DN100 to DN80 Eg 2 The inside diameter of process pipeline is DN100 medium is superheated steam steam consumption is around 0 5t h 2 8t h instrument pressure is 0 4MPa temperature is 220 C please confirm the proper instrument diameter Solution Based on instrument pressure 0 5MPa and temperature 220 C look up table 3 to find out the densi
10. V there is pulse output 3 The operating temperature for LCD screen is 0 50 C special order required if exceeded 4 Outline dimension 77mm 5 If the LCD screen blinks it means low power voltage the battery should be replaced Appendix 1 Commonly used formulas 1 For volume flow cumulation under working condition Ov 3600 X F K 2 For volume flow cumulation under standard condition Qn 3600 X F K X 293 1 273 1 t X 1 9 869 X P 3 For mass flow cumulation 19 Oc 3600 XFX p K 4 The conversion formula between mass flow and volume flow Ov Oc p Thereinto Qy volume flow under working condition m h Qn volume flow under standard condition m h p density under working condition kg m t temperature under working condition C P pressure under working condition MPa Qc mass flow kg h 2 The flowrate under the maximum flow can be worked out through the following formula Vmax 353 7Omax D Thereinto Vmax the flowrate under the maximum flow m s Omax maximum flow m h D diameter of transducer mm Kaifeng Kaide Flow Instrument Co Ltd No2 Indusrtial Road Huanglong Industrial Park Kaifeng County Henan China Website www kdyb com Tel 86 378 3212788 Fax 86 378 6682432 KAIDEYI BIAO 20
11. ameter value stands for measured medium Measured medium Liquid General gas Saturated steam Superheated steam Mark no 1 2 3 4 stands for nominal diameter Drift diameter 15 20 25 32 40 50 65 80 Mark no 015 020 025 032 040 050 065 080 Drift diameter 100 125 150 200 250 300 350 400 Mark no 100 125 150 200 250 300 350 400 stands for special marks Standard Intrinsic safe Local High Form Ordinary A i A signal output explosion proof display temperature 350 C Mark no Non M B X G 13 Appendix Table 1 The mass flow measuring range of saturated steam 14 hala ea alatet e SS kn D kg m an aso 0 808 LIS 165 au 34171367 14 1615 15 16 13 7 41 8 09 g BE gt ZE DIK 20 DN 200 HL 125 aa m fas as 4 foo ea fio aa ea nn om eta ek ee ma Ca iii aoganoaagangaadoi ae onan kd al ll eee eee e ea e 210 300 m n n n 600131 00 3600 4000 S000 16900 saa 000 i aos oo on 1000001 000 ANA 900000 aalalesltls esr eee e la aa 427 aa aso aaa ass usr joas ost Jost ora fis fna fas fis n 24 a 14 47 65 jon 14 17 laa 5 sja FP 57 Toa Qu 035 foan os aso azo aso 10 12113114 17 2 4 128131 38 e a n o u afa s o alo s e p ate a SOSUSS0E00905200006 15 Table 2 The density of superheated steam relative to pressure and temperature
12. ating temperature the temperature of Vortex generator m ANANA NANNAN No moving parts no abrasion high reliability Stainless steel shell corrosion resisting 2 Measuring principle When the fluid flows through vortex generator the triangular prism in the pipeline as partial flowrate go up a vortex pattern appears as shown in fig 1 the vortex alternatively appears as two columns it is called Karman Vortices The vortex alternatively segregates a fluctuating force is produced in the wake flow behind the prism the detecting probe installed behind or in the prism is affected by this tiny fluctuating force and the piezoelectric crystal parts buried in the probe is affected by the alternative stress then a alternating charge signal is generated The detector amplifier transforms amplifies wave filtering and signal reshaping this signal then outputs a voltage or current pulse signal with a freguency same as that of vortex shedding freguency or outputs an analog current signal which has a proportion with vortex shedding freguency Each pulse or every certain current the meter outputs stands for certain volume of measured fluid The total pulse or the integration of analog current in a certain period of time stands for the total flow of the fluid in it The discharge rate of Karman Vortex Street is related to the width of triangular prism and the flowrate of the fluid but have nothing to do with parameters like fluid temperature and pr
13. berr a Under operating status Press accumulate keypad the left keypad the instantaneous flow and cumulative flow will be displayed Press freguency keypad the middle keypad vortex freguency will be displayed Press content keypad the right keypad freguency Fr temperature C compensating density dE density compensating method Ur set density dEn flow coefficient U damping coefficient Lr the upper limit of flow FH the lower limit of flow FL etc will be displayed in turn b Under setting status Press accumulate keypad the left keypad to shift the bit of the set number the one that blinks Press frequency keypad the middle keypad to change the set numbers the one that blinks Press content keypad the right keypad to confirm the current page and turn to another c Setting method Press the right keypad and middle keypad at the same time turn into setting status a blinking letter Ur appears Press the left keypad to shift the bits press the middle keypad to change them then press the right keypad to confirm and turn into the setting of other items then the setting can be accomplished Afterwards press the right and middle keypads at the same time to quit setting status to turn into operating status 4 Remarks 1 Ifthe flow is lower than the lower limit of flow range it will be eliminated as small signals and won t be able to displayed 2 Only when the voltage of power supply is 12V or 24
14. d be as short as possible and avoid being rolled so that the distributed capacitance can be reduced The cable length is better less than 500m for voltage pulse type please consult with us if you need more 10 FEN kil F fi S f h 5 lo k 2 a ka oS n vvv ra n D o E LY glelalelel2 SAME 3 ya Fi al ake G Fig 7 The wire mode of transducer pressure transmitter and platinum thermal resistor 7 Debugging of transducer Generally there is no need of zero setting as the transducer is often well adjusted before leaving factory However when the ambient condition changes and the instrument functions abnormally reset zero point as described below Power on the transducer fill the process pipeline with medium close the valve in downstream of transducer close the one in upstream instead if it is unable to be closed widdershins adjust the potentiometer SF near the terminal to the end at this moment there are signals of disturbing pulse output for 4 20mA output type use a multimeter to check if there is pulse output from the first circuit board if not adjust the potentiometer pointer to R to make the signal output 4mA R stands for the potentiometer being adjust to the full scale value then slowly deasil adjust SF till there is no output Open the valve the instrument would normally function 8 Trouble shooting Malfunction 1 There is flow in the pipeline yet no output from transducer or no
15. d parameters leakage and the cheating in gas using can be spotted in time realize the chasing of historical metrological data so that deputies about gas using can be avoided 11 This system has the features as follow e Electric map of heatpipeline system e Monitor the parameters like cumulative flow instantaneous flow temperature pressure gas using period and instrument power on hours of all users e Able to provide the real time parameter curve of each user e Able to provide the annual monthly and daily cumulative flow curve of all and each of users e Able to provide the annual monthly daily or any period of time report forms of all and each of users Back up power supply Back up power supply eliminates the defect of not able to properly function when there is a 13 power failure When normally functioning the back up power supply is in charging status or holding status automatically turn into holding status after fully charged when there is a power failure the back up power supply automatically turn into supply status It is able to make the instrument continuously work more than 48 hours 12 Lectotype Codes The model of stress vortex flow transducer can be stated as LUGB K X XXX X O O stands for the way of jointing Connecting method Flange connection Flange clamped Inserted Mark no 1 2 3 Remarks The mark no of inserted vortex nominal diameter is its drift di
16. essure It can be expressed by the formula as below fS V d Thereinto f the frequency of Karman Vortex Shedding S Strouhal Number V velocity d width of the triangular prism Strouhal number S is a important parameter of vortex flowmeter it is only related to Reynolds number Re Only if Re is between 2 X 10 and 7 X 106 keeps being a constant 0 17 0 18 In this case the flowrate can be measured through measuring vortex frequency signal and the flow can be worked out through the flowrate of the fluid 3 Technical parameters Nominal diameter DN15 DN20 DN25 DN32 DN40 DN50 DN65 DN80 DN100 DN125 DN150 DN200 DN250 DN300 DN350 DN400 DN450 DN 500 Application gas air oxygen nitrogen coal gas natural gas chemical gas etc liquid water high temperature water oil beverage chemical liguid etc steam saturated steam superheated steam Fluid temperature 40 C 280 C 40 C 350 C Nominal pressure lt 1 6MPa lt 2 5MPa lt 4MPa Accuracy 0 5 for liquid and gas 1 0 for steam Flowrate range 0 27 9m s for liquid 3 80m s for gas 3 90m s for steam Measuring range refer to table2 Signal output Voltage pulse low level 1V high level 26V pulse width 0 4ms load resistance gt 150 2 Standard current 4 20mA conversion accuracy 0 5 full scale value load resistance 24V 500 Q local LCD display 5 bit display of instantaneous flow m h kg h t h conversion accu
17. gen 1 2506 1 165 methane 0 7167 0 668 hydrogen 0 0899 0 084 ethane 1 3567 1 263 oxygen 1 4289 1 331 propane 2 005 1 867 chlorine 3 214 3 00 ethene 1 2604 1 174 ammonia 1 771 0 719 propylene 1 914 1 784 carbonic oxide 1 2504 1 165 natural gas 0 828 carbonic oxide 1 977 1 842 coal gas 0 802 Remark As the relation between density and temperature and pressure is approximately linear relation the density under other degree of temperature and pressure can be worked out through the formula below P P oX 2893P T 273 15 The manual of compact local LCD vortex flowmeter 1 Features Adopt MSP430 series chip and two line part form liquid crystal strips able to set medium density then locally accurately measure the flow The local indicator is consist of a micropower amplify board suitable for any size of vortex flowmeter and display panel The amplify board can be commonly used that is it can be used in any size of vortex flowmeter through the dial switch and whether the fluid is liquid or gas The display panel is used for setting calculating and display 17 Technical parameters Instantaneous flow measuring accuracy better than 0 5 Frequency measuring measuring accuracy better than 0 2 Working battery voltage 3 0 3 6V External power supply 12V or 24V 2 e e Operating temperature 0 50 C please make a statement if used in special environment e e e The range of checking pulse output and cumulati
18. ng pulse output V low lt Vcc 3 V high22Vcc 3 The range of instantaneous pulse output 0 2500Hz e The allowable load current of pulse output less than 15mA 3 Operation 3 1 Formula a Instantaneous flow F 3 6X Fr freguency X dE density U meter coefficient b Cumulative flow The integral of instantaneous flow to time 3 2 The display of parameters on the LCD screen a Upper line instantaneous flow 5 bits Lower line cumulative flow 8 bits b Upper line mark Lower line frequency value c Upper line mark Lower line the set density d Upper line mark Lower line the upper limit of flow e Upper line mark Lower line elimination of small signal f Upper line mark Lower line flow coefficient g Zero cleaning of cumulant When being setting status set this item to 4321 000 then press the OK button to clear the cumulant 3 3 Range rod Q 12845 12345678 In order to see whether the flow is in the allowable range there is a rod which changes with 18 instantaneous flow on the right of the LCD screen of which the upper limit stands for the set upper limit and the lower limit stands for zero 3 4 Keypad Three membrane keypad is deployed on the displayer the instructions are as follow Position left middle right Operating accumulate instantaneous freguency content function i i add and subtract A Setting function shift confirm and page turning num
19. nter randomly or timely print cumulative flow instantaneous flow pressure temperature current time and the duration of power failure the intelligent flow totalizer paperless recorder can print the historical data and curve of specified period of time After a simple programming it is able to do heat calculation and measure the thermal difference of the measured medium Possess automatic recovery function apart from watch dog software there are watch dog power on and brown out reset system hardware deployed once there is a system error or an accidental death these functions can ensure the instrument forcibly resume Possess power failure protection function the operational results and the data set by customer in the totalizer would not lose when there is a power failure the saving time can be as long as ten years e Back up power supply is available automatically go into back up power supply when there is a power failure to make sure the instrument normally operating Wireless remote flow monitoring system Wireless remote flow monitoring system is base on wireless private network adopt many advanced technologies remotely real time gather the data of parameters like cumulative flow instantaneous flow temperature pressure of heatpipeline users terminal then transmit them to the supervising centre though wireless communication and make record then the daily management is completed Meanwhile according to the measure
20. pressure and temperature measuring points eee ae ae sese ee rese nn annan annan 9 6 Connecting of signal WiPG 4010 ieee sesa sena e santenn tan ennan santan onon onn tennt 10 7 Debugging of transducer 1c erect san ee seman eee an men onon sen onn tenyen nannan 11 8 Trouble shooting kitte aeeeees ese sanse stan sanse stan tanta santan tan tas oan tan tan ean ons e antan onon 12 9 Intelligent flow totalizer eetere tanta ons e an ea ons e anonse anan onon 12 10 Wireless remote flow monitoring systemet 13 11 Back up power Supply iii cere eer ensten oan ensten on sonnen one 13 12 Lectotype Codes reer eeeenet ea ea pen ea oan onon eman oan onon on sen onn onn 14 13 Appendixes eee ateri ate en ses ea restan san tanta entrene anonse ason season on season sen onon sen onn nan onn oan nan 14 The manual of compact local LCD vortex flowmeter 17 1 Introduction Stress type vortex flowmeter is a kind of velocity type flowmeter based on Karman vortex street theory adopt piezoelectric crystal to measure the vortex frequency produced by fluid flowing through the triangular prism in the pipeline then the flow value can be measured Vortex flowmeter is widely applied in industries like petroleum chemical light industry power supply heat supply etc VAAN It has the characteristics as follow High accuracy wide range Flow derection Wide medium application able to measure liquid DI d gas and steam b Aal High oper
21. racy 0 1 5 bit display of cumulative flow m kg t conversion accuracy 0 1 Power supply Voltage pulse output 12VDC 4 20mA output 24VDC Local LCD display 3 6V 5 lithium battery powered have a service life over 2 years Ambient temperature Voltage pulse output 30 C 65 C 4 20mA output 10 C 55 C Local LCD display 25 C 55 C Body material 1Cr18Ni9Ti others refer to contract 4 Lectotype instruction 4 1 Selection of nominal diameter When the diameter of transducer is different the measuring range is different And the measuring range of transducer with a certain diameter varies with the fluid difference operating temperature and pressure etc 4 1 1 For saturated steam when one of operating temperature and pressure a rough flow range are known the transducer diameter can be confirmed through table look up refer to table 1 For superheated steam when the operating temperature and pressure are known look up table 2 to confirm density along with flow range look up table 1 to confirm the transducer diameter Note The pressure values in table are absolute pressure which is the sum of pipeline pressure and atmospheric pressure 4 1 2 For gas and liquid when the medium conditions are inconsistent with that in the tables or other medium applied the measurement of flowmeter will be affected by medium density and viscosity The flow range is needed to be confirmed in advance then look up table 3 to
22. tting block to the pressure transmitting hole avoid leakage C Mount needle valve D Mount run E Close the needle valve inject cold water into the run F Mount pressure transmitter 5 4 2 The installation of platinum thermal resistor A Open a small hole at the certain spot on the pipe given in fig 6 the diameter of the hole should be slightly greater than the outer diameter of platinum thermal resistor around 440 B Weld the platinum resistance base to the hole ensure the bottom end of the base is in the centreline of pipe Pressure transmitter Pressure pipe Pressure base Neede valve Vortex transducer Platinum resistance Platinum resistance base The method of installing pressure transmitter and platinum resistance to horizontal pipe Pressure transmitter Platinum resistance base Platinum resistance Pressure pipe Neede valve L shape stub pipe The method of installing pressure transmitter and platinum resistance to vertical pipe 6 Connecting of signal wire 8BVPV3 X 0 5 signal transmitting wire is provided along with transducer therein the red wire is the positive power supply the black wire is the negative power supply others are frequency signals The wire mode of transducer pressure transmitter and platinum thermal resistor is as shown in fig 7 The shielded cable should be as far away from highfield as possible and being laid with highline is strongly prohibited The shielded cable shoul
23. ty 2 66 Then look up table 2 to get the flow range 0 4 3 5t h totally meet the operating requirement a vortex flow transducer with a diameter of DN100 should be chosen here If the steam consumption is around 0 3t h 2t h choose the ones with a diameter of DN80 pipe reduction would be needed here 5 Installation method and steps 5 1 Choose the right installation site When choosing installation site pay attention to the following points A The installation site should be in the location with no or little vibration the vibration acceleration should be no more than 2g if exceeded adopt vibration reducing measures B There should be enough straight pipe for both upstream and downstream refer to fig 2 C Service valve should be installed at the upstream of transducer and regulating valve downstream D Choose the most convenient location for installation and maintenace as possible E Dry location is more suitable F Transducer can be installed at both the horizontal and vertical pipelines When being installed at the vertical pipeline fluid liquid must flows from bottom to top G Transducer is better installed indoor pay attention to water proof if it must be installed outdoor cable outside the amplifier box should be bowing H Transducer should be kept away from electrical noise such as high power inverter high power transformer electromotor and high power wireless transceiver The requirement of straight pipe 1
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