user manual of dh250 metal tube flow meter
Contents
1. 38 900 1200 388 mm Float Materia 1 Cr Se HC 2 PTFE PVDF Ti 1 Le Co ce Pp 501 OG O CODO E LLL x x E C a m 1 m m LI a 1 E 1 1 1 a LI 1 E 1 m m LI m u 1 E 1 LI a cGOmnepcmmemmemmoomo oce000 beses ES th ih O O EM GR kh ih U UGC kh U Uh LA Gn OBDERORO 5805 2 Ln n Un En En b cU Coon co ARS 00000000 p O OO 5000060 oco 0 ERIS Cn Cn oh Oe de to de CRY GE E mail dudu darhor com Darhor Technology CO LTD 3 DN calculation DN calculation for liquid Volumetric flowrate of measured liquid Q L h Put density and maximum flowrate of measured liquid into Formula 1 and calculate the flowrate of water standard medium then find out the corresponding diameter and float number from flowrate table and put the flowrate of water provided by standard float No into Formula 1 again accordingly make out the flowrate of measured liquid finally adjust the flowrate into an integer so that to get the scale range of measured liquid Mass flowrate of measured liquid Q kg h Calculation formula of scale range is as follows while calculation method is as above Thereinto Q Max volumetric flowrate of measured liquid L h Max mass flowrate of measured liquid kg h Q Flowrate of standard medium water L h2. Red 7 3 barrier a 5v DC amp Red Power Supply A S m 7 V 4 20m Hazardous area Safety area Hazardous area Safety area i Power Supply Connection between meter and MTL safety barrier Connection between meter and LB safety barrier 2 K1 K2 limit alarm switch Brief introduction K1 K2 limit alarm switch is installed in the M6 indicator K1 is lower limit K2 is upper limit alarm point can be set at will K1 K2 alarm switch consists of two parts One part is in the indicator and simply named KG22 which is composed of SJ3 5N transducer and cutting disc on the rotation axis Fig 17 and can set alarm point within the entire flow range at will and indicate on the dial by the positioning pointer The other part is external isolated switching amplifier WE77 Ex Fig 18 transistor relay VVE77 Ex is divided into WE77 Ex 1 and WE77 Ex 2 VVE77 Ex 1 or WE77 Ex 1 G is only applicable to one KG22 and acts on K1 or K2 WE77 Ex 2 or WE77 Ex 2 G is applicable to two KG22 and acts on K1 and K2 Fig 17 KT K7 Limit Alarm Switch Fig 18 VETT Ex Transistor Relay 18 www darhor com E mail dudu darhor com Darhor Technology CO LTD Electrical Connection KG22 technical data Rated pressure Current 1055 Effective area open Effective area clase Self inductance self capacitance Ambient temperature Protection grade WE77 technical data Technical data AC Type VVE77 Ex 1 WE77 Ex 2 Power
3. 800 H2 Outline Dimension Transducer Type FET HI 1 LA Te ki E mail dudu darhor com Darhor Technology CO LTD Indicator There are two kinds of indicators local indicator and remote one Local indicator means displaying the flowrate by means of mechanical pointer on site for remote indicator it can display on site and convert flowrate signal into 4 20mA current signal so as to control the flowing process of fluid by connecting with control system Local display indicator Common local indicator M8 Fig 13 Punch forming of stainless steel and polishing the surface mechanical pointer indicates flowrate on site Remote indicator Remote indicator M6 with function of HART communication Fig 14 Intrinsical safe amp flameproof available mechanical pointer indicates flowrate on site LCD display mode is instantaneous flowrate total flow with Hart communication function Fig 13 M8 Indicator Fig 14 MB Indicator Note Every kind of indicator can be freely combined with any transducer to be various flowmeters with different specifications www darhor com E mail dudu darhor com 10 Darhor Technology CO LTD Selection Methods 1 Collection of process data e Ingredients density and viscosity of measured fluid e Maximum flowrate minimum flowrate and normal flowrate e Maximum operating pressure e Maximum temperature and minimum temperature 2 Maximum flowrate and minimum flowrate mus
4. 12 2 304 5041 516 516 504 3040 315 5166 304 5041 516 516 304 5041 516 5161 317 317L 317 31 FL 317 317L Al TI 317 317L 16r18Ni9Ti PTFE with PTFE lining WNI Nickel base alloy 276 B1 B2 Ti 316 316 Ti Ti Mickel base alloy 27b B1 Be Fig 12 Outline Dimension of Flange Flange Dimension ANSI B16 5 150 Ib DNPressure Flange Dimension Standard DIN2501 DN k b da Fon d D k b d f n d 7 BB so 11 2 351 l 4 15 7 15 4 0 95 65 16 45 2 4 lA 1080 792 142 S08 la 4 15 7 2574 0 115 85 18 6 2 4 14 2 1522 NAF 7193 717 L 1 30 4 0 165 125 20 102 3 4 18 JA 1905 1524 239 770 16 4 191 BO 200 1400 20 138 3 8 18 4 2206 1703 227 1572 1 6 17 1 TOO 1 6 cz 100 20 102 3 0 18 9 2540 2159 239 1857 l 8 224 125 16 250 210 22 188 3 B 18 6 2794 2413 254 2157 16 8 224 15016 285 24 22 228 3 8 22 4427 2785 284 2677 16 E 224 200 10 340 275 24 2680 3 12 24 ID 428 4 3420 30 2 3235 1 6 12 254 200 1 6 405 355 26 325 3 12 24 Mote unit min www darhor com E mail dudu darhor com Outline Dimension Outline Dimension FA FAP FAPY FATI Transducer Type Dimension 15 Dh Transducer Type Dimension EN 100 www darhor com Darhor Technology CO LTD Outline Dimension HI H1 H2 hl M Dh H2 nl hz Dh Transducer Type Dimension Dimension 300 300 750 Outline Dimension FD FDRY H1 400 400 400 400 400 500 500 z
5. 4 x 12 BL 5 4 x MIG AD 4 7 H x Mi BT 23 www darhor com E mail dudu darhor com Darhor Technology CO LTD Installation Precaution Fuge B m ii NE m F IH H L Outlet straight pipe sen Hil i4 Inlet straight pipe 1 ELT Magnetic 3 filter m EN HH LIL I TUE u hl 5xD h2 250mm ha ri h 150mm DM 125 DN 150 Meter Installation Drawing 24 www darhor com E mail dudu darhor com Darhor Technology CO LTD Customer Maintenance 6 Because the meter belongs to precise instrument should handle with care during meter transportation installation storage and usage and avoid overstress in installation meanvvhile not change the relative position of indicator and transducer to ensure the meter accuracy There will be ferromagnetic particles deposited on the float in operating if impurity is too much it will block float deadly or affect measuring accuracy Therefore please clean pipe and float regularly If necessary mount magnetic filter at the meter inlet and clean it regularly Due to inside of indicator is electronic components during disassembly the cover of housing must tighten the screws of the cover and seal the housing to prevent harmful materials such as liquid ferromagnetic or corrosive gas from entering the meter At the same time ensure housing grounded reliably Whenuse the meter first time
6. pe Density of float kg m pi Density of measured liquid kg m s Density of water kg m Float density of various materials as follows Material CrNi Steel PTFE PVDF Mickel alloy Ti Denstiy t m 7 85 3 4 38 B 21 2 Example Some liquid to be measured its operating density is 850 kg m and max flowrate is 2400 L h please calculate its diameter float No and scale range Solution density of float 7800 kg m density of water p 1000 kg m Put pr 850 kg m and 2400 L h into Formula 1 to get 2188 86 L h Then look up the flowrate table and find out DN25 float No F26 3 2500 Put Q into Formula 1 again to get Q 2741 23 Then adjust it into an integer get the scale range of this fluid 270 2700 L h www darhor com E mail dudu darhor com 13 Darhor Technology CO LTD DN calculation for gas Gas 1s easily affected by temperature and pressure and quite different from liquid Therefore at the time of calculating flowrate we do not only consider the density factor but also take account of the influences from temperature and pressure so It 1s extremely important to provide correct temperature and pressure of gas to be measured under operating condition Standard flowrate of measured gas On Nm h Thereinto www darhor com Qn Max volumetric flowrate of gas under standard condition Nm h Q Max volumetric flowrate of gas
7. Iud 1 C L z 3 L H Wa fl Press S key up arrow of ae Press 8 key Cursor moves to down arrow Press to change Press key innnnm innnmn ANA ILILILILI DUO E on gt v Float density setting 4 TON nn LU MIH L amp Motice 1 After setting press Z key move cursor to left down arrow then eft down data key 2 nr H gt yuyu ID lt CUL 1 Lt Press 5 key to store data changed and return to menu tree arrow becomes twinkling it means setting can be stored Press 5 key to store setting 2 Upper amp lower limit af span damping upper amp lower limit alarm gas density gas pressure gas temperature and float density which setting methods are the same as above 3 After entering configuration data setting it wil return to normal display without any key pressing in 2m i etting data is aver limi displays OVER pre ev or zkevtareset Looking Through Setting Parameter In operating mode press S key for 3s to look through setting parameter quickly looking through sequence is the same as parameter setting operation interface process Corresponding Relationship between Instantaneous Flowrate Unit and Total Flow Unit Mmi H Hm H mi H mim 5PEC mr L H Lim L T H Tim T KG H RS G H G www darhor com E mail dudu darhor com 31 Darhor Technology CO LTD Operating Instructions l Install pressure or curre
8. mode and press S key to see about every parameter e In password input mode press S key to enter parameter setting menu tree on submenu set parameter revision state it is setting parameter key which also is data storage key on submenu set parameter storage state K1Z key which is short for Z key hereinafter e In operating mode press Z key for 3s to entering password setting mode In setting mode it is cursor moving key e In looking through configuration parameter mode press Z key to return operating mode Data storage way In data setting mode after data setting press S key when down arrow is twinkling to realize data storage function Setting of span decimal point Span and decimal point are set once out of factory also can use S Z key to reset Setting procedure is as follow e Press S key to enter data setting mode meanwhile sign bit become twinkling it means that can amend sign bit To press S key again can switch over positive amp negative of data plus 1s shown as up arrow e Press Z key the first digit can be amended when it becomes twinkling at this moment press S key for a long time or for several times setting data circulates from 0 9 e Press Z key again can set second to fifth digit by turns setting method is the same as the setting for first digit o After setting the fifth digit press Z key to set decimal point Decimal point can be set when the four decimal points become twinkling at the same
9. should notice the following two points Liquid measurement open valve slowly to avoid water head attacking the meter Gas measurement before running do not exert pressure on pipe or if valve is opened suddenly float would rush to brake to damage meter Therefore open valve slowly Recommend a damping device to be equipped to reduce float vibration at utmost Forintelligent remote indicator first ensure correct wiring check up and then power on meter Otherwise easy to damage meter Key operation must conform to the manual If operate blindly it will cause data stored in EEPROM lost or damaged Meter should be stored in the place with temperature 20 C 60 relative humidity 85 no sunshine and corrosive gas When open housing of explosion proof flowmeter to maintain on site should turn off the power When ambient temperature is lower than 30 C or higher than 85 C LCD may appears stasis or blind screen however LCD won t damage under this condition when temperature reverts to normal range LCD display normally 25 www darhor com E mail dudu darhor com Darhor Technology CO LTD Operating Instructions Keyboard Instruction Normally double key is for flowmeter operating model K2S key and K1Z key all located on PCB and need to open cover of LCD indicator to see K2S key which is short for S key hereinafter e In operating mode press S key for 3s to enter looking through configuration parameter
10. time press S key now decimal point will switch over circularly e After decimal point setting press Z key it can be stored once left down arrow becomes twinkling Press S key store setting press Z key sign bit becomes twinkling it means that can reset parameter 26 www darhor com E mail dudu darhor com Darhor Technology CO LTD Operating Instructions Operating State When flowmeter is operating it displays instantaneous flowrate total flow by turns If total flow is more than 99998 it displays as x 1000 right of LCD displays as x 1000 nn tu i m j Instantaneous flowrate Total flow Zero Clearing Operation of Total Flow Operation content In operating mode enter password input mode input password 00001 to enter total flow clearing mode and select total flow clearing after this to return operating mode Operation method In operating mode press Z to enter password input mode combining Z key cursor moving with S key data setting input password 00001 press Z key to move cursor to down arrow of left screen which down arrow Is twinkling Press S key to enter total flow clearing mode press S key to select data of right down screen as YES YES is for clearing NO is for not clearing Press Z key to carry out total flow clearing and return to operating mode Operation interface process Password input mode Password input mode Password input mode Press Z key to Press 5 key to set move cur
11. 29 0 53014 0 86859 135717 2 12058 3 58377 5 42867 8 4823 13 2534 19 0852 33 9292 53 0144 0 14137 0 31807 0 54549 0 88357 1 44755 2 26195 3 53429 5 97295 9 04779 14 1372 22 0893 31 8086 54 5487 88 3573 0 28274 0 63417 3097 174715 2 89529 4 523859 7 06858 11 9459 18 0956 28 2743 44 1786 63 6173 113 097 176 715 0 546547 1 27235 2 26195 3 53429 5 7058 9 04779 14 1 372 23 89 1B 35 1711 54 5487 88 3573 127 2345 226 195 353 429 84823 1 90852 3 39292 5 30144 8 68588 13 5717 21 2058 35 8377 54 2667 84 823 132 536 239 292 530 144 1 13097 2 54469 4 52389 7 6858 11 5812 18 0956 28 2743 47 7356 72 3823 113 097 176 715 254 469 452 309 704 585 141372 3 18086 5 65487 B B3573 14 4765 22 6195 35 3429 59 7295 70 4779 141 372 220 893 318 086 545 487 883 573 222743 6 36173 11 3097 17 6715 2B 9579 45 2389 70 6858 119 459 170 956 282 743 441 786 636 173 1130 973 1767 15 Appendix 2 Manufacture Standard of Metal Variable Area Flowmeter GB T 6844 93 JJG 257 94 GB T 15464 1995 www darhor com Metal Variable Area Flowmeter Verification Regulations of Rotameter General Technical Specifications of Instruments Packing E mail dudu darhor com 33
12. CD display Numerical range for instantaneous flowrate 0 50000 Numerical range for total flow 0 99999999 Explosion proof Intrinsical safe Exia IIC T6 Flameproof Exd IIB T6 www darhor com E mail dudu darhor com Darhor Technology CO LTD Transducer Type Transducer is also named as measuring tube consisting of tapered tube float guider brake and mounting flange Classified by pipe installing type Vertical installing type FA Fig 4 FAP Fig 5 FAPV Fig 6 Horizontal installing type FD Fig 7 FDPV Fig 8 Classified by corrosive characteristics of measured fluid Standard type FA FD Corrosion resistant type FAP FAPV FATi FDPV Classified by state of measured fluid Liquid Common type Gas FAZ gas damping type Fig 9 Classified by temperature of measured fluid High temperature Cooling jacket FAT Fig 10 FDT Fig 11 Low temperature Heating jacket FAT FDT Fig 4 FA Transducer Fig 5 Transducer Fig 5 FAP Transducer www darhor com E mail dudu darhor com Darhor Technology CO LTD Transducer Type Fig 7 FD Transducer Fig 8 Transducer Fig 3 AZ Gaz Damping Type Fig 10 FAT Tranzducer Fig 11 FDT Tranzducer www darhor com E mail dudu darhor com Darhor Technology CO LTD Transducer Material Model Measuring Tube Tapered Tube Teroristi 1CrIBINIBTI 1TCrIBNIBTI TCrIBNIBTI OCT SN Mo TI OCT SN TAM o2Ti 12 2
13. Connection Adjustment of WE77 Ex 1 amp WE77 Ex 2 Isolated switching amplifier includes power supply transistor rectifier amplifier and output middle relay VVE77 Ex 1 with a safety control circuit WE77 Ex 2 with two safety control circuit and its output is equipped with wiring terminal of open circuit It is also easy to change wiring to become closed circuit operation or closed circuit operation with open circuit monitoring According to the following table replace cable jumper to get various working condition Indicate relay closure with one LED Circuit connection of KG22 with isolated switcher WE77 Ex Connecting circuit diagram Functions as follows Closed circuit with open circuit monitoring refer to the table of next page for mode conversion Harmal close of relay 1 843 5M transducer 2 salated switching amplifier 3 When relay operating LED is light 4 Output of relay 5 Power supply 220 VAC 2 Di Tg O IB N L 7 17 ui R AC Di T pi m 4 FAO FE HPE ok 12 H LI NZ i 11 E X g 11 3 L N 3 3 ES Y L rri El m Oa 10 O re me Eben X LED ga o d 3 7 LED 13 Oy PA i kl A it 694 m e 1 zur Ja r 1 8 4 La Fl 4 A l d Oo d 10 WE77 Ex WE 7 Ex 2 WE77 Ex I WE 7 Ex Z C www darhor com 20 E mail dudu darhor com Darhor Technol
14. Darhor Technology CO LTD Contents I Main features of DH 250 intelligent metal variable area flowmeter 2 Measuring principle of DH250 intelligent metal variable area flowmeter 5 Technical parameter of DH250 intelligent metal variable area flowmeter 6 Transducer type of DH 250 intelligent metal variable area flowmeter 8 Transducer material of DH250 intelligent metal variable area flowmeter 8 Outline dimension of DH 250 intelligent metal variable area flowmeter 10 Indicator of DH250 intelligent metal variable area flowmeter 11 Selection methods of DH 250 intelligent metal variable area flowmeter 16 Selection table of DH250 intelligent metal variable area flowmeter 17 Electrical connection of DH250 intelligent metal variable area flowmeter 23 Installation precaution of DH250 intelligent metal variable area flowmeter 25 Customer maintenance of DH 250 intelligent metal variable area flowmeter 26 Operating instructions of DH250 intelligent metal variable area flowmeter 32 Common fault and treatment of DH 250 intelligent metal variable area flowmeter 33 Appendix www darhor com E mail dudu darhor com Darhor Technology CO LTD Main Features DH250 intelligent metal variable area flowmeter has local display type and intelligent remote type Intelligent remote type provides customers with very flexible options such as pointer display LCD display for instantaneous flowrate or total flow standard two wire 4 20mA current output HART commun
15. cer and after process by A D converter digital filter microprocessor processing D A converter to LCD display instantaneous and total flowrate Fig 3 as below Flow Scale Float Flows Direction Fig 2 Analog Type LCD Display k D A Convert Magnetic Transducer 3 ue El _ E m MCU llpper Lower Limit Alarm Keyboard Operation Fig 3 Intelligent Type www darhor com E mail dudu darhor com 4 Darhor Technology CO LTD Technical Parameter e Measuring range Water 20 C 10 300000 L h Air 20 C 0 1013MPa 0 7 3000 m h Refer to flovvrate table special flovvrate can be ordered e Turndown ratio 10 1 for standard e Accuracy 1 5 for local 1 0 for remote e Rated pressure DN15 DN50 4 0MPa Max DN15 32MPa DN25 25MPA DN50 20MPa DN80 DN250 1 6MPa Max DN80 10MPa DN100 6 4MPa DN125 4 0MPa DN150 4 0MPa DN200 2 5MPa DN250 2 5MPa e Pressure loss 1 5 60kPa Viscosity DN15 30mPa s DN25 lt 250mPa s DN50 DN250 300mPa s e Fluid temperature Local 80 300 C Remote 40 150 C High temperature 350 C Ambient temperature Local 40 80 C Remote 40 50 C Storage temperature 20 60 C e Relative humidity 85 e Connection type Standard DIN2501 Special specified by user Protection grade IP65 e Remote type Cable connector M20 1 5 Power supply 24 VDC Output signal 4 20mA DC HART L
16. e m pr density of float material kg m p density of measured fluid for gas density of gas upstream of float kg m FE cross sectional area of float at maximum diameter m Ge float weight kg The relationship between the annular area and lifting height of the float is shown as below when structure design is confirmed d and p are constants Formula contains quadratic term of h usually this nonlinear term can not be neglected Only when the tapered angle is little it can be considered as linear approximately Thereinto d Maximum diameter of the float m h Lifting height of float starting from ID of tapered tube D max of float m B Tapered angle of the tapered tube a b Constant www darhor com E mail dudu darhor com Darhor Technology CO LTD Measuring Principle According to process mode of measuring signal metal variable area flowmeter can be divided into a Local display rotate follow up magnet in the local indicator by the magnetic coupling with magnet inbuilt in the float to drive the pointer to indicate the flowrate on scale directly Fig 2 as below b Intelligent remote display rotate follow up magnet in the intelligent indicator by the magnetic coupling with magnet inbuilt in the float to drive the sensing magnet and pointer at the same time the change of the magnetic field is converted to electrical signal by magnet transdu
17. e maintenance after normal operation Some meter defects always happened during commissioning due to some dirty material in the pipe to cause float be blocked and the pointer of indicator is stopped fixedly At this time first close the valves on both sides of the flowmeter then disassemble the upper flange of the flowmeter move out the float to clean and then reassemble Please notice that the flange nuts should be tightened up evenly and hold the gasket The flange on the process pipeline must be coaxial and parallel to the flange of the meter To avoid the pipe vibration suggest supporting the pipe Control valve should be installed at the downstream of the flowmeter Because the meter transmits signal by magnetic coupling in order to ensure the meter performance ferromagnetic matter should not exist around the meter 10m at least Gas meter is calibrated under specified pressure If the gas at the meter outlet is discharged into atmosphere directly it would produce pressure loss at the float and cause the data distortion Therefore require to install an exhausting valve at the meter outlet under this condition For flowmeter with LCD display ensure to avoid sun shining indicator directly during installation or would reduce life of LCD Pay attention to install meter with PTFE liner PTFE will be distorted under uneven pressure so flange nuts should not be tightened unevenly to avoid damaging PTFE liner Table of Max torque as below
18. ease pay attention to The size of upstream and downstream pipe should be the same as meter size Connecting flange or screw thread should also match with that of meter The upstream straight pipe h1 must be five times nominal diameter of meter The downstream straight pipe is not less than 250mm For vertical installation fluids flow from bottom to top and verticality keeps less than 2 for horizontal installation the level angle should be less than 2 When install flowmeter on process pipeline bypass pipe should be installed to handle with malfunction conveniently or not to affect production during flushing To ensure meter accuracy more than 5D straight pipe should be at upstream and 250mm straight pipe at downstream Require to equip magnetic filter if ferromagnetic material contained in fluids Require to equip filter between valve and straight pipe once solid impurity exists in measured medium For gas measurement pipe pressure should be not less than 5 times pressure loss of meter to ensure float working stably When the fluid temperature is high over 220 C or so low as easy to crystallize it needs to take measures of thermal insulation protection jacket type should be applied for heating or cooling It is necessary that all standards of the pipe flange fastener sealing gasket should conform to the standard of meter flange to ensure meter operation normally Generally speaking the metal variable area flowmeter do not requir
19. for instantaneous flowrate or total flow alternately Parameter setting can be realized Data recovery function HART Communication Single ax s sensitive indicator Backlight LCD display Intrinsical safe type and flame proof type available www darhor com E mail dudu darhor com Darhor Technology CO LTD Measuring Principle Detecting element of metal variable area flowmeter consists of a tapered tube extending from bottom to top and a float inbuilt in tapered measuring tube vertically Working principle is shown as Fig 1 when fluid flows upward into annular space between tapered tube and float the float will move upward along the tube due to lifting force formed by differential pressure of up and down end of float When the flowrate of fluid increases the float will displace much more on the contrary when the flowrate of fluid decreases the displacement of float will reduce correspondingly too Therefore the position of float is decided by the flowrate of fluid as well as the flowrate determines annular area between the maximum outside diameter of float and inner wall of tapered tube When fluid keeps a stable flowrate the float locates in a dynamic balance state the annular area between float and tapered tube also keeps constant At this moment there are three forces acting on the float downward weight W upward floating force F and fluid dynamic force P and these forces locate in balance According to Bernoulli equation of hyd
20. ication etc Besides the meter adopts advanced microprocessor and high quality industrial components to ensure superior performance in various applications According to different installation pattern of measuring tube when flow direction is from bottom to top from left to right or from right to left different installation type can be selected as per the customer requirements Matching M6 indicator on the measuring tube will be the intelligent remote type M6 indicator is the multifunction digital magnetic measurement transmitter designed for DH250 intelligent metal variable area flowmeter which core is the MCU and adopts magnetic transducer to measure magnetic field change through digital signal processing technology such as digital filtering software amendment etc Two line LCD display provides a good interactive interface and current signal output and Hart communication provide more selections for customers Very suitable to small diameter and low velocity Simple structure reliable performance low maintenance and long service life Low requirements for straight pipe Wide turndown ratio 10 1 Local display type and intelligent remote type Single ax s sensitive indicator Non contact magnetic coupling system to ensure stable data transmission Can be used in flammable and explosive dangerous situations Protection grade IP65 Main features of intelligent M6 indicator Measure the angle displacement of magnetic field LCD display
21. ion interface process Enter parameter setting operation interface process Instantanenus Lower limit of span High limit of span Password input mode flowrate unit setting setting setting Press Z key en Press key a nnnnr ann a ja mann innnn vUUUUU IUD 1 gt are gt HUUU m 3 H mli Lg mld i I a i VR Media state selection High limit alarm setting Lower limit alarm setting Damping setting Press Z key Press 2 key MULA 1 TT HE 3 udu 1 A4uuu E D ur 12 Gas density setting INN NNN a IN AN 13 Gas pressure setting iuuuu gt JUDO _ UN LU 14 Gas temperature setting 3 s i Note These three items are just i for measuring gas S op Liquid density setting Float density setting Total flow display Instantaneous flowrate display Press Z key Press Z key Press Z key 7 r r ae nmn LLILALILI 1860 ud 188 1 r gt ULM I m3 Notice 1 11 and 12 wil show alternately In parameter setting mode without any pressing keys in 2m will exit fram setting mode and return to operating mode 2 Dashed line partis just for qas flowmeter 29 www darhor com E mail dudu darhor com Darhor Technology CO LTD Operating Instructions Example for parameter setting Set L H as instantaneous flowrate unit operation process 1s shown as below Password input mode Password input mode Pass
22. ith Hart function Is a new kind of digital flow transmitter with Hart communication function It can configure on site to display instantaneous or total flow on large screen of LCD Mainboard b a m A T in pi LCD hl A A P ill y pu m j m IF F Vee O s t A l a zi Fig 15 Features Configurate by hand held communicator or configuration software of PC 4 20 mA output with HART protocol digital communication two wires Communication meets HART protocol standard HART communication does not affect 4 20mA analog output Power supply of HART transmitter 12 36 VDC Damping 0 32s adjustable Ambient temperature 20 70 C VViring Open the front cover of indicator a blue connecting terminal on top of the base Fig 16 can be seen then carry out wiring according to vviring marks on terminal Meter adjustment on site Flowmeter mainboard has two kinds of function modes data setting mode and current minitrimming mode Factory setting is data setting mode e Data setting mode can set configuration data flovvmeter data and reset total flow into zero e Current minitrimming mode can minitrim 4mA and 20mA current 17 www darhor com E mail dudu darhor com Darhor Technology CO LTD Electrical Connection Connection between meter and safety barrier Blue SES 24V00 4 Safety 22 6 barrier 2 i y cm E
23. nt stabilizer or hnderate Mediurm flaw state Increase damping Medium pulse and atmospheric Severe pressure are instable or users Provide correct parameter parameter doesnt conform to the actual Pointer stops moving Bec PR Adjust guider of float and brake to be concentric Incorrect installation Reinstall Liquid density changes greatly Calculate compensation factor Gas affected by temperature and Temperature and pressure Push the pointer with finger to Loose parts calibrate if incorrect adjust the location of parts Ma current output Bad output board Change PCB Calibration value is lost Data recovery Ma display on the spot Incorrect power supply Check power supply Poor contact of LCD module Reinstall LOD module Incorrect parameter setting of span and LCD always displays zero r Reset L ul in Change PCB Incorrect parameter setting Reset Incorrect total flow output PCB fault Change PCB 32 www darhor com E mail dudu darhor com Darhor Technology CO LTD Appendix 1 Relationship Between Velocity and Flowrate Velocity mal 030 1 oso 100 200 300 400 500 1000 Flowrate 001 010 19 RET ER 0 00283 0 00634 0 01131 0 01767 0 2895 0 04524 0 07089 0 11945 0 18074 0 28274 0 44178 0 634817 1 13097 1 76715 0 02827 0 06362 0 11309 0 17672 0 28953 0 45239 0 70687 1 19459 1 80956 2 82743 4 41786 6 36173 11 3097 17 6715 0 08482 D 19085 0 339
24. ogy CO LTD Electrical Connection AC Type DC Type Input Output Input Output Function m Mechanical m Mechanical VVE77 Exl WET7 Ex2 WEJZ7 Exl G WE77 Ex2 G Initiator onem Relay Initiator witch Relay l Switch position i x z Connect Connect Switch positions arts I m T Ps un Ls lt E terminal 2 5 terminal Im L UT oo S ad ermira 443 LT 7 8 1 3 749 Blocked Signal Mo action blocked Signal 1 Action iu Switch postion 4 4 Connect Connect Switch position 4 ais L L Val 25 5 terminal terminal 1 connects emne lk l 2 445 344 terminal 143 yal L L 647 lio Blocked Signal Action blocked Signal 1 No action 7443 9 g 4 T w N l F 1 JEA e m Switch Signal I 0 m i position 1 Noconnect Blocked vent Action blocked Signal 1 action 3 no connect x 150 1 A 2 Mo connect zn m la pen m ri Tek D dm I L ne i Blocked signal Action Mo blocked Signall action Wiring diagram of KG22 with WE77 1 Signal power supply l 1 2 lalals ef7 9 5 Cable jumper 5 297 EHE ri 1 LA m 3 a 13456 Terminal Indicator with upper limit or lower limit alarm hoard of 1 Power supply WE 77 Ex1
25. rodynamics force equilibrium equation and fluid continuity principle we can calculate the average instantaneous flowrate flowing into the annular area so the float flowmeter is also called variable area flowmeter high performance permanent magnet steel is embedded inside float By this way the magnetic field will be produced around the float When flowrate of fluid tends to stable and float locates in dynamic balance state the surrounding magnetic field distribution reaches stable too By means of the flowrate indicator mechanically connected with tapered tube the magnetic signal of the float will be transmitted in non contact form In another word indicator is able to detect and process with the flowrate in the mode of magnetic transducer and finally shows the flowrate by pointer on indicator scale board or intelligently process to display instantaneous and total flow in LCD indicator and outputs a standard 4 20mA current signal Brake P Permanent magnet steel Tapered tuhe Bw Guider WaP F Mounting flange Flow Direction Fig 1 www darhor com E mail dudu darhor com gt Darhor Technology CO LTD Measuring Principle Basic formula of volumetric flowmeter Q is If the float is hollow body Q is Thereinto a flowrate factor determined by float shape gas expansion parameter e 1 for liquid AF annular flowing area m g local gravity acceleration m s V g float volum
26. s key Damping time Press Z key Lower limit alarm setting Press key Upper limit alarm setting Press Z key Media state selection lq Press Z key Gas density n m Press Z key Press Z key Gas temperature Press Z key Media density setting 3 Press Z key Total flow display ow screens display alternatively unit is as setting value instantaneous flowrate display Tow screens display alternatively unit is as setting value No pressing keys in 2m will return to running mode automatically Hatice 1 Media state selection is set by manufacturer before goods out of factory 2 Gas pressure gas density and qas temperature are set and displayed N justfor qas metal variable area flowmeter 3 f upper lower limit alarm function are nat selected they can not be set automatically ar measured value will be affected www darhor com 28 E mail dudu darhor com Darhor Technology CO LTD Operating Instructions Operation method In operating mode press Z to enter password input mode combining Z key cursor moving with S key data setting input password 00002 press Z key to move cursor to down arrow of left screen which down arrow is twinkling Press S key to enter the first item in parameter setting mode instantaneous flowrate unit selection submenu Press Z key to enter next submenu lower limit of span setting then with the same method to enter next submenu Operation for every content is shown as following operat
27. sor 00001 as password N 3 Press 2 key to move I 17 cursorto down arrow to select and p 3 return ta operating Press 5 key to Press 5 key t enter we select YES or NO total flow clearing menu 68500 lt a YES for clearing Ma for nat clearing www darhor com E mail dudu darhor com Darhor Technology CO LTD Operating Instructions Process for Adjusting Zero of the Instantaneous Flowrate Password input mode Press Z key Password input mode Press 5 key Password input mode sessi key for s 5 Nm reum SIR Bam cursor x nnnn 7nn 1 uua uu D gt uu m 3 1 me j m R a m Press Z key p 11 e To select and return t operating mode Parameter Setting Operation content JUI r 5 ji Press Z key to move cursor to down arrow Press S key A Press S Key mannan iuuuu LUULU lt uuu mani r m Submenus belonging to parameter setting tree are instantaneous flowrate unit setting lower limit of span setting high limit of span setting damping time lower limit alarm setting high limit alarm setting media state selection density setting float density setting etc Operation procedure hlenu tree content setting content In operating mode 3 3 gm mm Lim Press key Lower limit of span setting Press key Upper limit af span setting Pres
28. supply Standard 220v AC 45 65Hz Special type 24 42 110 I27VAC Power consumption About 3 5 vA Input intrinsical safe type DINT9243 or NAMUR Protection grade Explosion proof 79 2043 X Open circuit voltage Short circuit current 8 mA 31 mA safe distributed inductance capacitance EEx ic IIC 3 mH 230 nF DRE i m m B E i m a BVDC 13 5vDC EEx ib IIC 31 mH 409 nF Output extrinsical safe type EEx ia IIC or EEx ib IIC Ima 160 uH is related ta hazardous place 0 nF iS related to hazardous place 25 100 P62 DC Type WE 7 Ex 1 43 WEI Exe 15 70WDC Vy DIM 192430F NAMUR EEx ia Cor EEx ib IC Ex B1 2146 X BVDC 12 7vDC B mA 2 m 2 mH 230 nF 70 mH 800 nF Switch type WET Ex 1 ane switching terminal YE Fi Es ane switching terminal WETT Ex 2 two switchingl terminale VETT Ex 2 two switching terminals Contact capacity AC 4A 250V 500AJ coszQ 7 DC 220v 0 1A G0V 0 6A 24V 4A Display relay working isa LED Lise LED Meter housing Material LY 12 Installation Installed on standard bar 35mm as per DIM46 227 or DIN 43 603 dimention Connection Screw thread self open type tightly fix terminal max cross section area Z 1 5m m Protection type 1 20 as per DINAU 050 Environment Moise as per DIN40 040 ambient temperature 20 60 max relative humidity 5 96 www darhor com 19 E mail dudu darhor com Darhor Technology CO LTD Electrical
29. t conform to the flowrate range of Table 1 and Table 2 Table 1 Flowrate Table for Horizontal Installation Float Material 1 Cr Stee He Water Loh Air mh Pressure Loss kPa DH Float Ho 10 1013MPa abs 20 C 0 1013MPa abs 20 C Special order for low pressure loss 2 1 2 F16 5 160 100 4 5 LA 1 5 Fl Sa 200 120 6 0 L 1 5 16 6 250 160 7 5 20 2 0 F16 60 300 200 0 20 2 0 16 7 400 220 12 2 2 5 168 500 400 18 2 5 3 5 FZ26 1 1000 600 30 b 1 5 F26 2 400 1000 45 3 0 3 0 25 Fb 20 2000 1200 60 3 0 3 0 F26 3 2500 1600 75 ded d 5 F28 3c 3000 2000 50 3 5 3 5 F26 4 4000 2500 120 80 8 0 F56 1 6000 4000 180 30 3 0 F56 1a 8000 5000 240 3 0 3 0 50 F56 2 10000 6000 300 4 0 4 0 F56 20 12000 8000 360 4 0 4 0 F56 3 5000 10000 480 8 0 8 0 6 25000 14000 750 14 0 14 0 80 FB la 30000 20000 900 14 0 14 0 F86 2 40000 25000 1200 22 0 22 0 F 106 40000 40000 1800 30 0 30 0 100 Flo la 80000 50000 2400 30 0 30 0 1062 ODO 3000 44 0 44 0 120 Fl26 100000 80000 000 45 0 45 0 F128 2 125000 100000 48 0 48 0 150 FI56 1 125000 100000 46 0 25 01 F156 2 50000 125000 50 0 50 0 200 F206 1 200000 60 0 www darhor com E mail dudu darhor com 11 Selection Methods Darhor Technology CO LTD Table 2 Flowrate Table for Vertical Installation 100 1 24 150 www darhor com O d R UD 6 oo S328833333233383585885888sssssssss 8888 85 35
30. under operating condition m h Qm Max mass flowrate of gas under operating condition kg h Q Flowrate of standard medium air m h ps Density of air under standard condition kg m Pst Density of gas under standard condition kg m pr Density of gas under operating condition kg m Ps Absolute pressure of air under standard condition 0 1 MPa Pt Absolute pressure of gas under operating condition MPa Ts Absolute Temp of air under standard condition 293 15K Tj Absolute Temp of gas under operating condition K E mail dudu darhor com 14 Darhor Technology CO LTD Example Some gas to be measured oxygen its average molecular weight 32 process pressure 0 4MPa gauge pressure process temperature 25 C Max flowrate 35Nm h please calculate its diameter float No and scale range Solution ps 1 204kg m P 0 1MPa T 293 15K 1 331kg m P 0 5MPa T 298 15K On 35Nm h Put the acquired data into Formula 3 to get Q 16 60 m h Look up flowrate table find out DN 15 Float No F16 8 18 Put Q into Formula 3 again make out Qn 37 96 Then adjust it into an integer and get scale range of measured fluid 3 8 38 Nm h www darhor com E mail dudu darhor com Darhor Technology CO LTD Electrical Connection 1 Mainboard of flowmeter with Hart function Fig 15 Brief introduction Mainboard of flovvmeter w
31. word input mode we I LIL Press Z keyio Press S key fu sel d Press 2 key for 3s move cursor a x 00002 as ad Inn 77 00002 00008 nnnn ULA uuuuu LU LILILILI m J F H l i Press Z key to move cursor Lower limit of to down arrow span setting Press 210 select and Press 8 key io change Press S key to enter n NE ar instantaneous fovrate Aoi r span settin e P innmm B lt ada AR onio st down tine x mm2770 Dooa flowrate Ku uu i L E 1 A LILA I Jii wam LILA I F amna i HEHH LH 2 MIA ae Notice 1 Press Z key to select after setting 2 setting method of medium state selection is the same as above 3 After entering configuration data setting it will return to normal display without any key pressing in zr 30 www darhor com E mail dudu darhor com Darhor Technology CO LTD Operating Instructions Set 2 0000kg m as liquid density operation procedure is shown as below Password input mode Press 2 Password input mode Press S keyto Password input mode qst 5 au cursor mimm gm nnnnn nnnnz NANANG nn nnnnn guyu uu uu mJ H 5 Press 5 key to 3 anter parameter Press Z key to setting screen 2 move cursor to Liquid Density setting Lower limit of span setting uy Press key P 3 BM 3737171721 FRIWmR11YY UDUT lunu
32. yu 2 SU3 5N slit type initiator Transistor relay 3 Open circuit connected breaker terminal 3 and terminal 4 8 9 1011 13 Closed circuit connected breaker oq nud terminal 4 and terminal 5 I 4 Signal connection point switching dam en position af floating contact ASS ile l rnativi Carm ET cT sw bkck Tranzducer E A riered NEN i 21 VVVVVV darhor com E mail dudu darhor com Darhor Technology CO LTD Electrical Connection Wiring diagram of KG22 with WE77 Ex 2 Signal power supply Cable jumper 999222999 Indicator with upper limit or lover limit alarm Terminal 1 Power supply board of 2 5J3 5M slit type initiator of cable jumper with upper WE 77 Ex 2 indicator limit contact open circuit terminal 2 and terminal 3 Transistor relay Closed circuit connected cable jumper terminal 3 and terminal 41 TAR 3 SJE 5N slit type initiator of cable jumper with lower i dr H r limit contact open circuit terminal 7 and terminal 5 J Closed circuit connected cable jumper terminal 5 min Maiz Main and terminal 7 4 Upper limit contact 5 Lower limit contact wWoEwinlbe br bross 3e sblack Alternativa Transducer SS EH 0060000 oo0d0000 m www darhor com E mail dudu darhor com 22 Darhor Technology CO LTD Installation Precaution To ensure meter operation performance and measuring accuracy pl
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