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VORTEX FLOWMETER

M e a s u r e m e n t + C o n t r o l

since 1927 Industr ial Distr ibutors

2M e a s u r e m e n t + C o n t r o l


Content

1. Overview..............................................................................................32. Measuring principle..............................................................................33. Technical parameters............................................................................34. Guide for lectotype.................................................................................45. Installation methods and steps:...............................................................66. Connection of signal wire.....................................................................117. Primary debugging.............................................................................118. Removal of malfunctions......................................................................119. Intelligent flow integrating instrument...................................................1110. Wireless remote flow monitoring system:............................................1311. Backup power supply.........................................................................1312. Wall-mounted instrument box............................................................1413. Model coding explanation..................................................................14

INSTRUTEK-LUGB VORTEX STREET FLOW METER Product applicable range.........................................................17 Working principle.....................................................................17 Instrument characteristics........................................................17 Technical parameters................................................................18 Outline dimension....................................................................18 Type spectrum table.................................................................19 The selection of instrument......................................................19 Installation requirements..........................................................21 Wiring......................................................................................22 Parameter setting.....................................................................22 Field debugging and maintenance...........................................23





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1. Overview

Stress type vortex street flow meter is one kind of speed type flow meter. It bases on Karman vortex street theory and adopts piezoelectric crystal to detect the burble frequency of the fluid caused by flowing through the triangular prism in the pipeline and then measure the flow of fluid. Vortex street flow meter is widely used in petrol, chemical industry, light industry and power heat supply and so on.

Vortex street flow meter has the following characteristics:

High measuring accuracy, wide range;•Extensive measured mediums, can measure liquid, gas and steam;•High working temperature, medium temperature can be up to 350°C;•No moving parts, no abrasion, with high reliability;•Meter body adopts stainless steel material, corrosion-proof.•

2. Measuring principle

When the fluid in the pipeline passes the burble generator (triangular prism), burble will generate due to the acceleration of partial flow rate (as Fig.1). This burble will arise alternatively in two burble lines, which is called Karman vortex street.

The releasing frequency of Karman vortex street depends on the size of triangle prim and flow rate of fluid, while independent of the medium feature parameter, such as the temperature, pressure. It can be indicated by the following formula:

f=StV/d....................(1)

Here: f:the releasing frequency of Karman vortex street - St:Strouhal number - V:medium flow rate - d:the width of triangle prim

Strouhal number is an important parameter of vortex street flow meter, which only relates to the medium Reynolds number Re. Strouhal number St should be a constant As long as the Reynolds number of medium in the pipeline kept in the range of 2×104 to 7×106. Thus, we can detect the flow rate of fluid medium by measuring burble frequency signal and then calculate the medium flow by medium flow rate.

3. Technical parameters

Nominal aperture: DN15, DN20, DN25, DN32, DN40, DN50, DN65, DN80, DN100, DN125, DN150,DN200, DN250, DN300, DN350, DN400, DN450, DN500;Applicability: Gas (air, oxygen, nitrogen, coal gas, natural gas, chemical gas and so on), liquid (water, high temperature water, oil, food liquid, chemical liquid and so on), steam (saturated steam, overheated steam);Measurable medium temperature: -40˚C ~ 280˚C, -40˚C ~ 350˚C;Nominal pressure: ≤1.6MPa ≤2.5MPa ≤4Mpa;Accuracy grade: Liquid 0.5 grade, gas, steam 1.0 grade;Range of flow rate: Liquid: 0.6-6 m/s, gas: 5-60m/s, Steam: 5-70m/s;Measuring range: See table 1, table 2;Output signal: Voltage impulse: lower electrical level ≤ 1V, higher electrical level ≥ 6V, width of impulse 0.4ms, load resistance >150Ω; Standard current: 4-20mA, conversion accuracy ±0.5% full-scale value, load resistance 24V-500Ω, field LCD Display: instantaneous delivery 5 bit display (m3/h, kg/h, t/h), conversion accuracy ±0.1%; integrated flux 9 bit display (m3, kg, t), conversion accuracy ±0.1%;

Flow direction

Burble generator

Burble

vd

Figu

re 1





Power supply: When voltage impulse output: +12VDC; when 4-20mA output: +24VDC; Field LCD display: 3.6V No.1 1 lithium cell power supply, working life more than 2 years; Ambient temperature: When voltage impulse output: -30˚C —+65˚C; when 4-20mA output: -10˚C —+55; Field LCD display: -25˚C —+55˚C; Material of meter body: 1C r18Ni9Ti (other materials supplied by agreement).

4. Guide for lectotype

4.1 Determine the aperture

Primaries of different apertures have different measuring range. The measuring range of every aperture will change along with the variation of measured medium types, work condition temperature and pressure. For gas and liquid, firstly make sure the rough flow range of medium, fixing the primary aperture by looking up table (table 1); for saturated steam, after making sure the work condition temperature or pressure and rough flow range, the primary aperture can be fixed by looking up table (table 2); for overheated steam, make sure the work condition temperature and pressure, and then ascertain its density by look up table 3, finally fix the primary aperture by looking up table 2 through the density and rough flow range. (Note: In the table 2, the pressure is absolute pressure,absolute pressure = pipeline pressure + atmospheric pressure.)

Calculation of mass flow:QG=3.6Frρ/K.....................................(2)

Here: QG——mass flow (When K is the value indicated on the nameplate, unit is t/h; When K value reduced by 1000 times, unit is kg/h)

Fr——Impulse (Hz)ρ —— Density (kg/m3) K —— Instrument coefficient (Impulse number m3) Frequently-used reduction formula:

A: Volume flow under work condition state converts to the one under standard state: QN = 2695 (P+0.1013) QV / (273 + t).....................................(3) B: Density under work condition state converts to the one under standard state: ρ N = (273 + t) ρ 0/2695 (P+0.1013).....................................(4) C: Mass flow converts to volume flow: QV = QG / ρ.....................................(5)

Here: QV——Volume flow under work condition state (m3/h) QN ——Volume flow under standard state (m3/h) ρ N ——Density under Standard state (kg/m3) t—— Temperature under work condition state (˚C) P——Pressure under work condition state (MPa) QG——Mass flow (kg/h)





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Table 1: Measuring range of liquid and gas

4.2 Determine appropriate configuration:

A. Determine to use remote transmission type or field display type;

B. When choosing remote transmission type, for saturated steam, should select temperature automatic compensatory density or pressure automatic compensatory density; for overheated steam, should select temperature and pressure simultaneous compensatory density; for other mediums, should ascertain whether they need compensation according to actual conditions.

C. When choosing intelligent flow integrating instrument, if only need to display parameters, such as flow, pressure and temperature, LED display or LCD display intelligent flow integrating instrument can be selected; if need to review its historical data and with memory function, intelligent flow integrating paperless recorder should be selected.

D. No matter which kind of intelligent flow integrating instrument is selected, if need RS485 or RS232 communication interface should be taken into consideration.

E. No matter which kind of intelligent flow integrating instrument is selected, if need backup power supply should be taken into consideration so as to measure normally when power failure suddenly. (With different configuration, the working time is different, generally more than 24-48 hours.)

F. When selecting intelligent flow integrating instrument, if need instrument box should be taken into consideration so as to put intelligent flow integrating instrument in it, hanging on the wall and prevent the arbitrary modification of setting parameters.

G. When selecting remote transmission type, should consider if need wireless, no-range flow monitoring system to realize the real-time supervision and management of flow for every pipeline.

H. If the measured medium is flammable and explosive substance or measuring flammable and explosive gas exited in the measuring environment, explosion-proof primary and measuring system should be selected.

4.3 Calculation of primary pressure loss:

After ascertaining the aperture of primary, primary pressure loss can be calculated to make sure if the primary will influence the process pipeline.

Computational formula is: ∆P≤1.2ρV2.....................................(6)Here: ∆P——Primary pressure loss (Pa) ρ—— Fluid density (kg/m3) V—— Average flow rate of the fluid in pipeline (m/s)

Liquid(Water of normal temperature)

Gas (work condition)Aperture mm

Liquid(Water of normal temperature)

Gas (work condition)

3Unit: m /h

Aperture mm

Measurable Range Examine Measurable Range Examine Measurable Range Examine Measurable Range Examine

15

20

25

32

0.4~5

0.75~8

1~11

1.5~20

0.5~4

0.8~6.5

1.2~10

1.8~14.5

4~35

5~60

6~90

12~180

5~25

8~40

10~60

16~100

125

150

250

200

24~350

38~450

75~850

130~1300

30~240

45~360

90~720

150~2200

140~100

250~3800

400~6000

200~1600

600~9000

300~2400

500~4000

700~5600

40

50

65

80

100

2.5~30

3.5~50

6~70

10~140

16~220

3~24

4.5~36

7.5~60

12~100

20~160

16~240

30~450

40~700

70~1000

120~1800

20~160

35~280

50~400

80~640

150~1200

300

350

400

450

500

180~2000

250~2800

320~3300

360~4000

420~5000

200~1600

280~2300

350~2800

400~3200

500~4000

800~12000

1200~18000

1500~22000

2000~30000

2500~38000

1000~8000

1500~12000

2000~16000

2500~20000

3100~25000





Flow rate of max. flow can be calculated by the following formula: Vmax=353.7Qmax/D2.....................................(7)Here: Vmax——Flow rate when max. flow (m/s)Q——Max. flow m3/h D——Aperture of primary mm

4.4 Examples for lectotype

Example1: The inner diameter of process pipeline is DN100. Medium is saturated steam. Gas consumption is 0.5t/h-3t/h. Gauge pressure is 0.4Mpa. Please select the aperture of instrument.

Solution: By the gauge pressure 0.4Mpa know the absolute pressure is 0.5Mpa, and get temperature is 152˚C by looking up table 2. The flow range of DN100 is 0.4-3.5t/h and it can complete meet the requirements. So DN100 vortex street flow primary can be selected. If the gas consumption is about 0.3t/h-2t/h, DN80 vortex street flow primary can be selected. And at this time, process pipeline should be reduced to DN80 from DN100.

Example 2: The inner diameter of process pipeline is DN100. Medium is overheated steam. Gas consumption is 0.5t/h-2.8t/h. Gauge pressure is 0.5Mpa. Temperature is 220˚C. Please select the aperture of instrument.

Solution: According to the pressure and temperature, it is known from table 3: the density is 2.66 when gauge pressure is 0.5Mpa, temperature is 220˚C. It can be learned from table 2: when density is 2.66, the flow range of DN100 is 0.40-3.50t/h, which can meet the use requirement. So select DN100 vortex street flow primary. If the gas consumption is about 0.3t/h-2.0t/h, DN80 vortex street flow primary can be selected. At this time, process pipeline needs shrinkage pipe.

5. Installation methods and steps:

5.1 The selection of installing position:

When selecting the installing position, need to pay attention to the following points: A. The installing position should not have pipeline vibration or have slight vibration, of which vibration acceleration not more than 2g. If the vibration is very fierce, shock absorption measures should be taken. B. There should be enough straight pipelines in the upstream and downstream of primary (see Fig.2) C. Service valve should be installed in the upstream of senor, while flow regulating valve in the downstream. D. To choose position easy to install, examine and repair as can as possible. E. Should select dry position. F. Primary can be installed on horizontal pipeline and vertical pipeline. When installing on the vertical pipeline, medium should be flow from the bottom to up. G. Primary should better be installed indoors. If it must be installed outdoors, should pay attention to water proofing. The cable outside magnifier box should be bent to U type. H. Primary should be kept away from electrical noise, such as high power frequency converter, high power transformer, electromotor and high power wireless transmitter-receiver and so on.

5.2 Installing requirements:

A. When welding, should ensure the flange end face vertical to the centerline of pipeline. B. The bigger pitch position of mounting hole is meter pole mounting position, and the direction of two flange mounting holes should keep accord. C. After welding the flanges, should clean up the pipeline and must not have weld slag.





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5.3 Installation steps: Method

1: (shown as Fig.3):A. Fix the installing position, cut off front/back straight pipelines of appropriate length according to Fig.2 and one pipe of L1 length (shown as Fig.5 and table 5).B. Respectively weld a flange on the front/back straight pipelines. After adding glands on the two ends of primary connect primary and flange by bolt stud (Note: The arrowhead direction on the meter body should keep accord with fluid flowing direction.)C. Weld the front/back straight pipeline of primary on the original pipeline.

Method 2: (shown as Fig.4):A. Select the installing position and fix the front/back straight pipelines according to Fig.3. Cut off a pipe of length L1 (shown as Fig.5 and table 5) between front and back straight pipeline.B. Respectively weld a flange on the front/back straight pipelines. When welding, all the mounting holes of the two flanges should keep concentric.C. After adding glands on the two ends of primary connect primary and flange by bolt stud.

Table 2 Measuring range of saturated steam mass flow

5.4 Primary installing outline dimension is shown as Fig.5 and table 5. For reference when installation.5.5 When primary and pressure transmitter/temperature transmitter forms a measuring system, the position of pressure and temperature measuring points can be selected according to Fig. 6.5.5.1 The installation of pressure transmitter:

A. Open the leading-pressure holes on the pipeline according to the given position on Fig.6 (about / ф12);B. Weld the leading-pressure base on the position of leading-pressure holes. Note that leakage is forbidden;C. Install needle type valve;D. Install leading-pressure pipe;E. Close the needle type valve and pour cold water into the leading-pressurepipe;F. Install pressure transmitter;G. Open the needle type valve when running.

Flow UnitAbsolute pressure (Mpa)

Temperatura˚cDensity (kg/m³)

0.21201.13

0.3 0.4 0.5 0.6 0.7 0.8 0.9134 144 152 158 165 170 1751.65 2.17 2.67 3.17 3.71 4.06 4.66

ApartureDN (MM)

Flow Range

1520253240506580

100125150200250300350400450500

6.5~4211.5~7418~11530~19046~29572~460121~775

0.18~1.170.29~1.850.45~2.860.65~4.121.15~7.131.79~11.42.58~16.53.51~22.44.58~29.35.80~37.17.16~45.8

7.2~5412.8~9620~15034~24552~38582~600

138~10100.21~1.550.33~2.400.51~3.750.74~5.401.31~9.602.05~15.02.95~21.64.02~29.45.25~38.46.64~48.68.2~60.0

8.3~6614.7~11823~18537~30058~47591~740

154~12500.23~1.900.36~2.960.57~4.650.82~6.661.46~11.82.28~18.53.28~26.64.46~36.35.83~47.47.37~60.09.10~74.0

11.3~1299~79 9.7~92 10.1-105 10.8511520.1~23016~141 17.3~163 17.9-186 19.2-206

52~58541~360 44~415 47-470 49-530 32~36025~220 27~255 28-290 30-320

81~91064~560 68~650 73-740 77~830 130~1430100~880 110~1020 110~1160 120~1290 210~2410170~1480 180~1720 190~51950 200~52180 0.32~3.650.26~2.20 0.27~2.60 0.29~52.96 0.31~53.30 0.51~5.710.40~3.50 0.43~4.10 0.46~54.62 0.48~55.16 0.79~8.920.63~5.47 0.67~6.36 0.71~57.22 0.75~8.06 1.14~12.80.90~7.88 0.96~9.16 1.02~10.4 1.08~11.6 2.02~22.81.60~14.0 1.71~16.3 1.82~18.5 1.92~20.6 3.16~35.72.50~21.9 2.67~25.4 2.84~28.9 3.01~32.3 4.55~51.43.60~31.5 3.84~36.6 4.10~41.6 4.33~46.4

6.20~70.04.90~42.9 5.23~50.0 5.67~56.6 5.90~63.2 8.10~91.46.40~56.0 6.83~65.1 7.28~74.0 7.70~82.6 10.2~1168.10~70.9 8.65~82.4 9.21~93.6 9.74~105 12.7~14310.0~87.5 10.7~102 11.4~116 12.0~129

Kg/h

t/h





Table 2 Measuring range of saturated steam mass flow

Table 3 The density of overheated steam relative to pressure and temperature

Note: When density value is between the two values, it can be figured out by interpolation.

Flow UnitAbsolute pressure (Mpa)

Temperatura˚cDensity (kg/m³)

31 1.2 1.4 1.6 1.8 2.0 2.5 235179 187 195 201 206 212 223 155.15 6.13 7.10 8.08 9.06 10.1 12.5

ApartureDN (MM)

Flow Range

1520253240506580

100125150200250300350400450500

Kg/h

t/h

27.4~39511.9~141 12.9~165 13.7~191 14.7~213 16.5~239 18.4~266 22.8~329 48.7~70221.1~250 23~294 24.3~339 26.2~378 29.4~424 32.8~473 40.6~585 76~109633~390 36~460 38~530 41~590 46~662 51~738 64~913 124~180154~640 59~750 63~860 67~970 75~1088 84~1213 104~1501 204~282285~1000 92~1170 98~1350 110~1520 123~1704 137~1900 170~2352

248~3682130~1560 140~1840 150~2110 160~2380 179~2669 200~2975 298~4418 520~7444220~2640 240~3100 260~3560 280~4010 314~4496 350~5012 433~6203

0.65~9.410.34~4.00 0.37~4.70 0.39~5.39 0.42~6.08 0.47~6.82 0.53~7.60 0.78~1.131.20~17.60.53~6.25 0.57~7.34 0.61~8.42 0.65~9.50 0.73~10.7 0.81~11.8 1.00~14.7 1.88~27.50.83~9.77 0.90~11.5 0.96~13.2 1.02~14.8 1.14~16.6 1.27~18.5 1.57~22.9 2.74~39.71.19~14.1 1.29~16.5 1.38~18.9 1.47~21.4 1.65~24.0 1.84~26.8 2.28~33.1 4.86~70.52.12~25.0 2.29~29.4 2.46~33.7 2.61~38.0 2.93~42.6 3.27~47.5 4.05~58.8 7.56~1103.31~39.1 3.58~45.9 3.84~52.6 4.08~59.4 4.57~66.6 5.09~74.3 6.30~91.9 10.9~1594.77~56.3 5.16~66.1 5.53~75.8 5.88~85.5 6.59~95.9 7.35~107 9.10~132 14.9~2166.49~76.6 7.02~89.9 7.52~103 8.00~116 8.97~131 10.0~146 12.4~180 19.2~2828.48~100 9.17~117 9.82~135 10.4~152 11.7~170 13.0~190 16.0~235 24.5~35710.7~127 11.6~149 12.4~171 13.2~192 14.8~216 16.5~241 20.4~298 30.3~44113.3~156 14.3~184 15.4~211 16.3~238 18.3~266 20.4~297 25.2~367

Absolute pressure(Mpa)

Temperatura˚c460140 180 220 260 300 340 380 420

0.440.15 0.78 0.71 0.65 0.60 0.56 0.52 0.49 0.46 0.580.2 1.05 0.95 0.87 0.80 0.75 0.70 0.65 0.62 0.730.25 1.32 1.19 1.09 1.00 0.93 0.87 0.82 0.770.870.3 1.59 1.43 1.31 1.21 1.12 1.05 0.98 0.93 1.050.36 1.92 1.73 1.58 1.45 1.35 1.26 1.18 1.11 1.160.4 1.93 1.75 1.62 1.50 1.40 1.31 1.23

0.5 1.461.54 1.64 1.721.88 1.99 2.20 2.42 2.93 0.6 1.751.851.972.102.262.442.66

2.040.7 3.44 3.11 2.86 2.64 2.46 2.30 2.16 0.8

2.48 2.34 2.63 2.82 3.02 3.27 3.58 3.960.9

2.632.79 2.983.173.413.694.044.50 5.04 1 2.93 3.10 3.50 3.53 3.80 4.12 4.52

6.461.4 4.05 4.37 4.65 4.98 5.37 5.855.311.8 8.51 7.64 7.00 6.46 6.02 5.64

9.58 2 5.916.28 6.71 7.21 7.818.56 7.122.4 10.45 9.48 8.72 8.10 7.578.342.8 12.41 11.19 10.26 9.51 8.88

16.613.2 9.57 10.2010.9411.83 12.94 14.463.6 10.9111.54 12.39 13.43 14.76





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Table 4 Gas density under standard state (kg/m3)

Name of gas Air ChlorineHydrogen Oxygen Nitrogen Alkaline Air Dawson Gas

1.293 0.8360.773.214 1.251 1.430.0889 0°C, 0.1013MPa ρ N

Name of gas Argon Air

0°C, 0.1013MPa ρ N

Firedamp Acetylene ButaneEthane Propane Coal Oven Gas

0.48491.79 1.017 0.717 1.357 2.005 2.703

Name of gas PropyleneEthylene Natural Gas Coal Gas Carbon Monoxide Carbon Dioxide

0°C, 0.1013MPa ρ N 1.9771.264 1.914 0.828 0.802 1.25

20DN 5DN25DN 5DN

40DN 5DN50DN 5DN

18DN 5DN

Shrinkage pipe

15DN 5DN

Upstream section Downstream section

Pipe expanding

90˚ camber or T type joint2X90˚ camber (same plane)

2X90˚ camber (different planes)Control valve

8DN 5DN

RectierFi

gure

2Fi

gure

3

Position for cutting Position for meter installation

Cutting off the pipeline Front/back straight pipelinewelded on the original pipeline

Front straight pipeline L1 (table 5) Back straight pipeline

Welding Welding





Position for cuttingPosition for meter installation

L1 (table 5)

Cutting off the pipeline Install the instrument

Figu

re 4

H

D

L1

L2 Figu

re 5

Table 5 The outline dimension of frequently-used instruments

5.5.2 Installation of Platinum thermistor

A. Open appropriate holes on the pipeline according to the given position on Fig. 6. The diameter of holes should be lightly bigger than the external diameter of Platinum themistor base (big diameter / ф40);B. Weld the Platinum themistor base on the holes position. The upper and lower positions of Platinum themistor base should ensure the lowest end of Platinum themistor lay on the centerline of pipeline;C. Install Platinum themistor.

DN L1 L2 D H Match with seamless steel pipe

36615 72 90 95 36820 72 90 105

72 72 72

90 90 90

253240

110114150

37537736036750 80 102 165

80 102 185 3756538480 84 106 200

84 110 220 395100408120 125 94 250 421150 94 124 285 447200 110 144 340 473250 122 164 405 498300 140 186 460 523350 154 206 520

ф18X1.5ф26X3

ф32X3.5ф38X4

ф45X2.5ф57X35ф73X4

ф89X4.5ф108X4

ф133X4.5ф159X4.5

ф219X9ф273X10ф325X12

ф379X14.5ф430X15ф482X16ф534X17

548400 168 226 580 574450 182 248 640 599500 196 270 715





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6. Connection of signal wire

The primary is matched with 8BVPV3X0.5 signal transmission wire: red wire is power positive, black one is power negative and other colors is frequency signal. The connecting methods of primary, pressure transmitter and Platinum themistor are shown as Fig.7.

7. Primary debugging

Primary is adjusted before out of factory, so normally not needs to set zero. But if the field work condition changes or the operation of instrument is abnormal, need to set zero according to the following methods. The primary power on, the process pipeline is filled with mediums, close the flow regulating valve on the downstream of primary (When closing the downstream flow regulating valve unconditionally, also can close the upstream service valve), firstly contra-clockwise adjust the potentiometer SF (next to the terminal) to the end, at this time the primary has interfering impulse output signal (4~20mA output type, need to use multimeter to detect if there is impulse output on the first breadboard. If there is no impulse output, adjust R to make its output signal 4mA, R isadjusted full potentiometer.) Then slowly clockwise adjust SF until there is no output, and open the valve, instrument should work properly.

8.Removal of malfunctions

Malfunction: 1. There is flow in the pipeline, but primary has no output or intelligent flow integrating instrument has no display:

Removing steps:

A. Firstly make sure that there is flow in the pipeline and the flow is larger than the measurable flow lower limit of primary.B. To judge the amplifier is good or bad: contra-clockwise adjust the potentiometer SF on the amplifying board to the end and see if the primary has output or intelligent flow integrating instrument has display. If not, the amplifying board should be replaced. If has output, the amplifier is regular.C. To judge if the primary is broken or not: dismount the two lead wires of primary head from the amplifying board. Measure the resistance value between the two lead wires of primary head and the resistance value between the two lead wires of primary head and shell, all of which should be more than 2MΩ: , otherwise, primary head should be replaced.D. If primary is not broken, examine the pressure transmitter and Platinum themistor. If all is OK, can judge the intelligent flow integrating instrument is broken.

Malfunction: 2. There is no flow in the pipeline, but primary has output or intelligent flow integrating instrument has display:

Removing steps:

A. Check if the primary installing position has fierce vibration. If the vibration is too fierce, can consider mounting shock absorption bracket.B. Slowly clockwise adjust SF until the amplifier just has no output or intelligent flow integrating instrument just has no display.C. For other malfunctions, can contact our Technology Department.

9. Intelligent flow integrating instrument

According to the needs of user, we can provide various forms of flow integrating instrument mating with primaries, including LEC display intelligent flow integrating instrument, LCD Chinese character display intelligent flow integrating instrument, intelligent flow integrating paperless recorder. We also can mate with backup power supply and wall-mounted type instrument box, its main performance and characteristics are as follows:





Q

≥10D ≥5D≥6D

The methods for pressure transmitter and Platinumthemistor installing on horizontal pipeline

Vortex street primary

Needle type valve

Leading-pressure tubePressure transmitter

Leading-pressure base

Platinum themistor(temperature change)

Platinum themistor base Q

Needle type valve

Leading-pressure tube

Pressure transmitter

Leading-pressure base

Platinum themistor(temperature change)

Platinum themistor base

L type short tube

The methods for pressure transmitter and Platinumthemistor installing on vertical pipeline

Figure.6 The installation of pressure transmitter and Platinum themistor

1 2 3 4 5 6 7 8 9 10 11 12 13 14

15 16 17 18 19 20 21 22 23 24 25 26 27

A B COM +24VDC OV 22OV~

Τ

OUT+ OUT-+12VDC f+ f- dp+ dp- P+ P- T+ T- RT

- +

+ -

RED

BLAC

K

GND Vcc

one same to connect 12 11, terminal

Q

The wiring diagram between primary, pressure transmitter, Pt thermistor and WS-2000type intelligent ow integrating instrument

Figu

re 7





13

Measuring accuracy: analog quantity better than 0.2%, frequency quantity better than 0.1%•Flow signal can be frequency and standard current.•Can display integrated flux, instantaneous delivery, differential pressure, frequency, density, pressure, temperature, current time •and power on/off inquiry.Realize pressure auto compensation density, temperature auto compensation density and temperature, pressure simultaneous •compensation density.Can configure RS485 or RS232 communication interface, and has lightening protection.•Can configure micro stylus printer, arbitrarily and timing print integrated flux, instantaneous delivery, differential pressure, •frequency, density, pressure, temperature, current time and the start and end time of power off; intelligent flow integrating paperless recorder can print historical data and curves at appointed time quantum.Can conduct heat quantity calculation through simple programming and can measure thermal difference of measured •medium.Have auto restoring function: besides software watchdog, hardware system also is configured with watchdog.•Power on, power off resetting system, once system fails or accidental system halted, it can ensure instrument to recover to •operation forcibly.Have power-failure protection function: the calculation result inside instrument and data set by user will not lose when power •off and saving time is more than ten years.Can configure backup power supply. When power cut, it will automatically convert to backup power supply, so the instrument •can continue working.Can configure wall-mounted instrument box, which can make the field neat and protect the instrument from theft.•

10. Wireless remote flow monitoring system:

Based on wireless private network and adopting multiple advanced technologies, wireless remote flow monitoring system conducts remote and real-time data collection on instantaneous delivery, integrated flux, temperature and pressure at the user terminal of heat supply network pipeline and transmits to supervising and managing center and record by wireless communication mode so as to complete routine management. At the same time, it can timely find leakage or gas using embezzlement phenomenon and realize the historical retrospect of measured data so as to avoid the arising of disputes between the two parties.

The wireless remote flow monitoring system has the following functions:

Electronic map of heat supply network pipeline system;•Monitor all users’ parameters, such as real-time instantaneous delivery, integrated flux, temperature, pressure, gas-using time •and instrument power-on time and so on;Provide real-time parameter curve of single user;•Provide all users’ and single user’s integrated flux curve of different periods of time, such as year, month and day.•Provide all users’ and single user’s all reports of year, month, day and any period of time.•

11. Backup power supply

Backup power supply overcomes the shortcomings that user cannot measure normally when suddenly power off. Under normal operation, backup power is on charging or standby state (after charging, it will enter into standby state automatically); when power off, backup power automatically enter into power supply state, which can make the instrument continuously work more than 48 hours. After power on, backup power will automatically enter into charging state and then standby state after charging.





12. Wall-mounted instrument box

Wall-mounted instrument box is divided into general type and with backup power supply type. It has the following advantages:

Solve the problem that there is no putting space in field.•Make the field neat and it is convenient to check and copy the data.•Dustproof and anti-collision protect the intelligent flow integrating instrument and prolong its service life.•For the wall-mounted instrument box has locks, the setting parameter of intelligent flow integrating instrument can not be •adjusted arbitrarily and have anti-theft function; with air switch, it will protect the intelligent flow integrating instrument.

13. Model coding explanation

Operation manual for integrated type on-spot display vortex street flow meter

1. Characteristics

HD-1000B type integrated type on-spot display instrument is one kind of special circuits for vortex street flow meter designed by our company. It adopts MSP430 series chip and double-row segmentation LCD chip, which can fixedly set medium density to accurately measure the flow in field. A whole set on-spot display instrument is composed of micro-power loss amplifying board (applies to vortex of any aperture) and display board. The function of amplifying board is universal; viz. can match with gas and liquid of various apertures through dial-up switch. The function of display board is to complete the setting, calculation and display functions.

2 . Technical index:

1. Instantaneous delivery: measuring accuracy better than 0.5% 2. Frequency measurement: measuring accuracy better than 0.2% 3. Working temperature: 0~50˚C (make it clear for special environment)

1. Stress type vortex street flow primary2. Meter body connection Modes Flange connection Flange clamp installation3. Measured mediums: Liquid: (water, high temperature water, oil, food liquid, chemical liquid etc.) Gas: (gas, oxygen, nitrogen, coal gas, natural gas, chemical gas etc.) Steam: (saturated steam, steam-gas)4. Nominal aperture: DN15 DN20 DN25 DN32 DN40 DN50 .......... DN5005. Classification mark: General type No Anti-explosion type Field display type

LUGB

12

234

000102030405...

50

C





15

4. Working battery voltage: 3.0~3.6V 5. Outer power supply: 12V or 24V 6. Checkout range of impulse output and accumulated impulse output: V low ≤ Vcc/3, V high ≥ 2Vcc/3 7. Range of instantaneous impulse output: 0~2500Hz 8. Permissible load current of impulse output: less than 15mA

3. Use

1. Computational formula a. Instantaneous delivery: F=3.6 X Fr (frequency) X dE (density) /U (instrument coefficient) b. Integrated flux: instantaneous delivery vs time integral

2. LCD display screen shows each parameter according to the flowing pictures: a. First row displays five-bit instantaneous flow, second row display 8-bit cumulant Q 1.2345 12345678

b. First row display marking, second row display frequency value Fr—— 120.45

c. Display set density dEn—— 2.125000

d. Upper limit of flow FH—— 1000.000

e. Small-signal elimination FL—— 10.00000

f. Flow coefficient U—— 3.600000

g. Cumulant clear, when enter into setting state and set this item 4321.000, can clear cumulant Un—— 4321.000

3. Range bar: In order to judge if the flow is in the permissible range, on the right side of LCD screen will display a bar which changes following the change of instantaneous flow. The upper limit in the bar represents setting upper limit and lower limit stands for 0.

4. Keyboard: The display instrument has three thin-film keystrokes, detailed explanation is as following: Position: Left key Middle key Right key Functions when operating: Accumulation (instantaneous) Frequency Content Functions when setting: Shift Characters turn over Confirm and paging

a. Under operating state: Press accumulation key (left key) one time to display instantaneous flow and integrated flow; Press frequency key (middle key) one time to display vortex street frequency; Press content key (right key) one time to in order display frequency (Fr), temperature (˚C), compensation density (dE), density compensation mode (Ur), set density (dEn), flow coefficient (U), damp coefficient (Lr), flow upper limit (FH) and flow lower limit (FL) and so on.

b. Under setting state: Pressing accumulation key (left key) one time can shift the set character (flash character); Pressing frequency key (middle key) one time can modify the set character (flash character); Pressing content key (right key) one time can confirm this page and turn over the page.





c. Setting methods: Firstly press right key and then press the middle key simultaneously to enter into setting state. At this time, the display screen will display flash characters “Ur”. The user can complete the setting of all items by the shift function of left key, modifying function of middle key and confirming and paging function of right key. For example, set density is 3.240, measure saturated steam, firstly enter into setting state, set “Ur” 1.000000, dEn 3.240, then press right key to confirm, simultaneously display entering into the next parameter setting. After setting all the parameters, can exit setting state and enter into display state by simultaneously pressing right key and middle key.

4 . Remarks: 1. When flow is less than the set “flow lower limit”, it will be eliminated as small-signal and not displayed. 2. There is impulse output only when the power supply is 12V or 24V. 3. The working environment temperature of LCD screen is 0~50˚C ( It needs to customize when exceeding this temperature.) 4. Outline dimension: ф77mm. 5. If the LCD screen flashes, it indicates that battery voltage is too low and need to replace the battery.





17

INSTRUTEK-LUGB VORTEX STREET FLOW METER

Product applicable range

Vortex street flow meter is widely used because of its abroad applicable mediums, small pressure loss and convenient installation and maintenance. However, general vortex street flow meters’ anti-shock performance is bad, field use error is big.

We have researched and developed a new generation vortex street flow meter, whose all indexes has reached the advanced level of oversea same products with better anti-shock and non-linear correction capabilities. Compared with same domestic flow meters, it is a kind of vortex street flow meter with more functions, high cost performance and good use reliabilities and is also a kind of vortex street flow meter deserving users’ trust and selection.

Measuring main body with high-sensibility and long-lifetime sensing detector matching with different CPU anti-shock amplifier meter can compose of:

INSTRUTEK-LUGB-K anti-shock type vortex street flow primary - output pulse frequency signalINSTRUTEK-LUBB-K anti-shock type vortex street flow primary - output 4~20mA/pulse frequencyINSTRUTEK-LUJB-K anti-shock type vortex street flow meter - meter local display, can output 4~20mA/pulse frequency

Working principle

Same as general vortex street flow meter, INSTRUTEK-LUGB-K anti-shock type vortex street flow meter also take Karman Vortex Street as measuring principle. Provided that the front side of a triangular prism in the sealed pipeline is stroke by fluid, on the two sides of prism will generate two lines vortex street arranging alternatively. When the flow rate of fluid reaches a certain Reynolds number, the frequency f of this kind of alternative vortex street will correspond to the flow rate of fluid v.

The original signal of INSTRUTEK-LUGB-K anti-shock type vortex street flow meter is standard sine wave signal; while the outer shock disturbance signal is irregular sharp pulse signal. Through the CPU microprocessor wave filtering technology and fuzzy mathematical model technology principle, the disturbance signals mixed in original signal are all filtered. The transducing signal through CPU amplifying and shaping, output standard square wave pulse and can calculate corresponding flow value or convert into 4~20mA.

Instrument characteristics

1. With good anti-shock interference performance, there will be no shock interference signals when no flow and work properly and stably when have flow. 2. Adopting five-section nonlinear correction technology, the measuring range is wide. 3. Choosing industrial-class chip, can bear rugged exterior environment. 4. With LCD display meter, can display instantaneous delivery and cumulant. 5. With good anti-shock performance, can be used in general shocking occasions. 6. Gas and liquid full-universal design, reduce user reserve parts.





Technical parameters

Medium: liquid/gas/steamAperture: DN25~DN200Measuring error: 1.0%, 1.5%Repetitiveness: 0.5%Medium temperature: -20°C~+300°CAmbient temperature: -20°C~+55°CMedium pressure: 1.6MPa/2.5MPa (divided by aperture)Installation form: Flange clampingLower limit of flow rate: Liquid 0.3m/s Gas 2.0m/s Steam 1.5m/sRange ratio: >1:10Power supply: 12 ~24VDCOutput signal: Pulse/4~20mAExplosion-proof grade: dIIBT4Material of meter body: 1Cr18Ni9TiShell of meter: Cast aluminium lacquering

Outline dimension

L

D

H

Unit: (mm)

25

40

80

50

100

150

200

DND externaldiameter

D innerdiameter

L length H height

57

75

87

120

149

203

259

25

40

80

50

100

150

200

240

260

280

290

310

340

370

88

88

88

88

88

88

88





19

Type spectrum table

The selection of instrument

Correct selection for the aperture of vortex street flow meter is the prerequisite for user to prepare for measurement. The flow rate of fluid in the pipeline should meet the measuring range of flow meter. Whenever necessary, should take measures, such as contracted pipe or expansion pipe and so on.

The selection principle of aperture is to ensure the fluid Reynolds number (Re) within the range of 5×103~7×106. Reynolds number can be calculated according to the following formula: Re = V D/μ

V: Average speed of fluid D: Aperture of flow meter μ: Medium kinematic viscosity

Explanation

INSTRUTEL-LU

3

Specification code

ABC

Instrument type Flange connection Flange clamp installation Inser tion type

( ) Size( write down the size, like DN80)Nominal size

21

Measuring medium Liquid

Gas Steam

321

Medium temperature -40-250°C (only for pipeline type) -40-350°C (only for pipeline type) -40-4200°C

C

DY

Body material

1Cr18Ni9Ti casting(temp. smaller than 250°C) 1Cr18Ni9Ti (hammering) Special requirements

N

A

B

No compensation Saturated steam compensation(need equipped with LCD) Temperature, pressure compensation(need equipped with LCD)

Compensation function

LCD(instant, accumulated, temperature,pressure etc)1

0 No displayDisplay

10

32

No output (bat tery supply on site display) Voltage pulse 4~20mA two wire system 4~20mA three wire system

Output signal type

10

3

No 485 RS

HART Communication mode

1

32

9

0.5(pipeline type)1.0 (pipeline type)2.5( inser tion type)Special requirements

Accuracy

Standard type Explosion-proof type Exd II CT6Intrinstic safety type Exia II CT4

S

IDExplosion-proof grade

BW

Power supply24V DCBat tery supply

Max. flow rate





According to the above mentioned calculation, for the liquid with low viscosity, its range of flow rate generally is 0.3~6m/s. The flow rate range of gas is 2.0~50m/s.

For steam-gas and saturated steam, the measuring range of flow meter of every aperture under all working conditions can be fixed according to below offered table search method.

1.Measuring range of steam-gas Q [m/h] p [kg/m3]

2. Measuring range of saturated steam [T/h]

T( C) 150 200 250 300 350 400

PMPa

0.3

0.4

0.5

0.6

0.7

0.9

1.1

1.4

1.9

2.4

2.12

2.35

1.87

2.11

2.84

3.33

3.83

4.86

5.91

7.55

1.68

1.91

2.54

2.97

3.41

4.30

5.20

6.58

8.98

11.49

1.52

1.75

2.30

2.69

3.08

3.88

4.67

5.89

7.97

10.11

1.4

1.62

2.11

2.46

2.82

3.54

4.26

5.23

7.21

9.11

1.29

1.49

1.95

2.27

2.60

3.26

3.92

4.93

6.62

8.33

DN Min. volume flow Max. volume flow

25

40

50

80

100

150

200

10.6

27.8

44.3

102

172

379

628

150

390

630

1440

2430

5380

8920

T( C)

0.3 0.4 0.5 0.6 0.7 0.9 1.1 1.4 2.4

DN

25

40

50

80

100

150

200

P(MPa)

ρ (kg/m³)

0.2

134 144 152 159 165 170 180 188 198 224

1.66 2.17 2.67 3.18 3.67 4.17 5.15 6.13 7.60 12.5

125

0.02~ 0.02~ 0.02~ 0.03~ 0.03~ 0.03~ 0.03~ 0.04~ 0.04~ 0.05~

0.25 0.33 0.4 0.48 0.55 0.63 0.77 0.99 1.14 1.88

0.06~0.05~ 0.05~ 0.07~ 0.07~ 0.08~ 0.08~ 0.09~ 0.10~ 0.13~

0.66 0.85 1.05 1.25 1.45 1.64 2.03 2.44 2.99 4.9

0.08~ 0.09~ 0.1~ 0.11~ 0.12~ 0.12~ 0.14~ 0.15~ 0.17~ 0.21~

1.04 1.36 1.68 2 2.31 2.62 3.24 3.86 4.78 7.87

0.18~ 0.2~ 0.22~ 0.24~ 0.26~ 0.28~ 0.31~ 0.34~ 0.37~ 0.48~

2.38 3.12 3.85 4.57 5.29 6 7.42 8.83 10.9 18

0.29~ 0.34~ 0.37~ 0.41~ 0.44~ 0.47~ 0.52~ 0.56~ 0.63~ 0.80~

4.01 5.26 6.5 7.7 8.92 10.1 12.5 14.9 18.5 30.4

0.38~ 0.53~ 0.58~ 0.63~ 0.68~ 0.73~ 0.8~ 0.88~ 0.98~ 1.25~

6.2 8.2 10.2 12 13.9 15.7 19.5 23.2 28.9 47.5

0.65~ 0.74~ 0.82~ 0.9~ 0.96~ 1.02~ 1.14~ 1.24~ 1.39~ 1.78~

8.87 11.6 14.3 17.1 19.7 22.4 27.7 32.9 40.9 67.3

1.07~ 1.22~ 1.36~ 1.48~ 1.59~ 1.70~ 1.89~ 2.06~ 2.29~ 2.98~

14.7 19.3 23.8 28.3 32.7 37.1 45.9 54.6 67.7 111





21

When measuring liquid, if the pressure in the pipeline is too low and the flow rate is comparatively high, it often arises gas etching phenomenon and affects the flow measurement. So the min. pressure in the pipeline should meet:

P≥2.7∆P + 1.3P0 Pipeline pressure loss: ∆P = 1.29 ρ V2 P0: Pressure of saturated steam (MPa) ρ: Medium density (kg/m3) V: Average flow rate (m/s)

Installation requirements

Anti-shock vortex street flow meter adopts flange type installation. The flange should be reliably welded to the process pipeline and the interior should be linked tightly, smoothly and glossily. Ensure the coaxiality of pipeline, sealing ring and flow meter to ensure the use accuracy of flow meter.

Vortex street flow meter can choose installation mode according to medium and technical conditions. Generally choose horizontal pipeline upward side installation, high-temperature steam side installation or pipeline downward installation. For the liquid medium which may be with bubbles in the pipeline, should choose vertical pipeline installation and the fluid flows upwards. In order to measure accurately, there should be long enough straight pipelines at the upstream and downstream of flow meter. If meet bent expansion pipe, contracted pipe or valve and so on, the straight pipeline should be lengthened. Temperature, pressure and valve should be installed at the downstream. When necessary, a rectifier should be mounted.

The inner diameter of pipeline should not have distinct difference from that of flow meter. Especially the inner diameter of pipeline should not less than that of flow meter and the difference should generally ≤3%.

Flange

Sealing ring

Welding

Process pipe

Vor tex street flow meter

Typical pipelineLength of upstream straight pipeline

With rectifier Without rectifier

Length of downstreamstraight pipeline

Drawing down pipeline

Hole enlargement pipeline

One 90°elbow

Two 90°elbows (on a same plane)

Two 90°elbows (on dif ferent planes)

Behind control valve

8D

10D

20D

25D

10D

10D

15D

18D

20D

25D

50D

50D 5D

5D

5D

5D

5D

5D





Wiring

The recommended model for pulse transmission cable is RVVP3×0.35mm2 three-core shielded cable, for 4~20mA signal transmission cable is RVV2×0.5mm2 twin core cable. When wiring, should firstly cut off the power, the length of cable ≤500m.

After the transmission cable passing through the fairlead, should screw down the gland nut to make the inner diameter of sealing ring inclip the cable jacket.

After wiring, the shell of detecting amplifier should be winded up moderately to ensure its leak tightness.The shell of vortex street flow meter should be grounding reliably, grounding resistance ≤10Ω.There is no harmful gas on the installing field which will corrode the aluminum alloy.For explosion-proof occasions, user’s installation and use should abide by The People’s Republic of China Electrical codes for.

Explosive and Hazardous area.

Transmission cable needs steel pipe to conduct wiring and should keep away from high-power power source, such as power transformer and electric motor and so on, as far as possible to reduce electromagnetic interference.

Parameter setting

INSTRUTEK-LUGB/LUBB-K anti-shock type vortex flow primary/transmitter amplify board adopts full-universal design. Shown as the following Fig., the aperture and medium respectively correspond to SW1, SW2 switch position on amplify board:

12V/24V OV

Shield

Current Pulse

1 2 3 4 5 6 7 8

1 2 3 4 5 6 7 8

Sw1

Sw2





23

Field debugging and maintenance

Before out of factory, the vortex street flow meter has been accurately debugged and calibrated. Under common conditions, after instrument entering into field, only need to set flow coefficient on the local display meter and wiring according to stipulated mode, it will operate properly after power on without field debugging.

When field working conditions has big difference with calibrating conditions, need to conduct amplification adjustment, which will not affect measuring accuracy and instrument constant.

Vortex street flow meter doesn’t have movable parts, so doesn’t need frequent maintenance under normal using conditions. If the measured medium has scale formation matters, it need regular clean. While cleaning the interior, should protect the internal vortex generator and detecting probe and mustn’t descale by using blunts and spade to rap and dismount detecting components arbitrarily.

Aperture

mm

Sw1 Sw2

Gas Liquid Gas Liquid

25

40

50

80

100

150

200

1

2

3

4

1

1

2

3

4

4

5

6

5

7

5

5

6

6

6

7

7

Cali, [email protected]

PBX: (57-2) 8823250FAX: (57-2) 8816458

Cra. 1 #18-19

Bogotá D.C, Colombia

[email protected]: (57-1) 2010177FAX: (57-1) 2015640

Cll. 18 #22-66

Medellín, [email protected]

PBX: (57-4) 4448232FAX: (57-4) 3015907

Cll. 49Sur #46-11

Barranquilla, [email protected]

PBX: (57-5) 3531212FAX: (57-5) 3688925 - 26

Cll. 77 #67-37


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