Sensor data of ultrasonic flow meter
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This document provides instructions for installing different types of ultrasonic flow meter transducers, including: 1. Clamp-on transducers which attach to the outside of pipes and require cleaning the installation area and applying couplant. 2. Insertion transducers which are inserted directly into pipes and welded in place. Special straps are needed for some pipe materials. 3. In-line transducers which are flanged directly to pipes and have standardized dimensions for different pipe sizes. Parameters must be provided when ordering. The document describes the installation process for each type in detail, including preparing the installation area, calculating spacing, installing the transducers, and sealing connections to prevent
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transducer move.
The seal cover should be screwed tightly to prevent water after wires being connected..
7 check installation of transducers
After the completion of transducer installation, the user should check the following items to
see whether the installation is suitable,whether the received ultrasonic signal is correct,enough
strong,that could make the meter work normally and long time running. By checking the receiving
signal strength S, the signal quality Q value, the delta time, , the transit time
ratio R to assure whether the installation point is good or not. Normally,apply couplant on
the transducers and attach them on the pipe ,so can obtain measurement results,but it is better
to check followings to ensure the flow meter is working properly and the results are reliable
and accurate.
8 Signal Strength
Signal strength S (display on M90) indicates strength of sending and receiving signals from
upstream transducer and downstream transducer by a 3-digit number. [00.0] means there is
no signal detected, and [99.9] refers to the maximum signal strength that can be detected. When
installation,do best to adjust the position of transducers and check whether the couplant is
sufficient,to make sure to gain the strongest signal.Although the instrument works well
when the signal strength ranges from 60 to 99,when the signal strength is too low,you
should chech the installation position ,installation space,whether the pipe is suitable to
install or change to install by Z method. stronger signal strength should be pursued, because
a stronger signal means a stable measurement results,long and reliable running..
9 Note the following questions when installing
1，input pipe parameters must be correct,conform to actual facts,otherwise the flow meter will
not work.
2,when installing clamp on type transducers,apply enough couplant to make the transducers attach
on the pipe,check the signal strength and signal quality displayed on the screen while moving
the transducers around installation point to receive the best signal and signal quality.the
diameter of pipe is more wider,the range of moving transducers is more larger.then ensure whether
the installation space is the same with that on M25,whether transducers are installed in the
same axis line of pipe.if the signal strength is 0.00,that means no receipt of ultrasonic
beam,check whether the input parameters are correct or not, choosing installation method is
correct or not,whether the pipe is too old,liner is too thick,is there fluid in pipe？the space
is too near valves,angle head?too many air bubbles in fluid?if not these reasons,still no
signal,so have to try another point,or use insertion type transducers.
3,ensure whether the flow meter work normally:signal strength is bigger,signal quality is
higher,the displayed flow rate is more reliable,the meter can work for long time.if there is
too bigger environment electromagnetic interference or lower receiving signal,then the flow rate
displayed is poor,not be able to work normally for long time.
4,after installation,enter M26 to solidify parameters,power on again,check results are correct
or not.](https://image.slidesharecdn.com/sensordata-180304054223/85/Sensor-data-of-ultrasonic-flow-meter-10-320.jpg)
Sensor data of ultrasonic flow meter
- 1. 1 I transducers type: Clamp on sensor (or in track) Insertion sensor Inline pipe sensor 1 clamp on sensor: Before installation,choose density pipe to install transducers,and clean the installation area,clear away rust,paint,anti-rust layer,it is the best to use angle grinder to polish,use cleaning cloth with alcohol or acetone to clear oil and dust,coat enough couplant around the center of installation area,attach the transducers on the pipe and fix it without air bubbles or sand between transducers and pipe wall. High temperature S2H type High temperature M2H type High temperature L2H type Frequency of the sensor：1MHz Frequency of the main unit: 50Hz. 2 Insertion sensor:
- 2. 2 The insertion type transducer incorporates the advantages of clamp on type and in line type transducers,its features: Transducers can be installed directly on pipes of carbon steel or stainless steel by welding; while for those pipes of materials like cast iron, glass fiber reinforced plastic, PVC and cement which cannot be welded directly, special straps should be used for installation. For those users who are in similar situation, please inform us of the precise outside diameter of the pipe to be installed to prevent leakage. insertion B type（insert directly） Insertion B type (for sement pipe ) Suitable diameter Above DN80mm Above DN80mm Installation room ≥550mm ≥700mm Fluid temperature -40℃-160℃ -40℃-160℃ Transducer material 316L stainless steel 316L stainless steel A Installation tools Special hole-drilling positioning tools made by our company, 400w handle rotary drill (high speed adjustable is preferable), spanner and screwdriver are needed for installing insertion transducers.
- 3. 3 B Installation space Insertion style transducers spacing is calculated based on the distance between the centers of the two transducers along the pipe axis. The space will be shown on menu M25 when necessary data are put into the menu, and the transducers should be installed according to this space. C Installation method There is only one way to install insertion style transducers which is called Z-method installation and can be applied for all pipes which diameter is more than DN80mm. D Inserting the transducers screw the screw mut to a position under the bottom of the transducer and screw the transducer through the ball valve to ball valve spool. Open the ball valve and continue to screw the transducer until the head of transducer passes the inner wall of the pipe. Before the wires are connected, the angle of the transducer should be adjusted to make sure that the head of two transducers can be in face to face position so as to send and receive the signals properly(the hole for line of two transducers should be upward or downward at same time).and then fix the screw mut,connect the wires,use silicon rubber to seal the connection place. E Length calculation of the part of transducer into the pipe inner wall: Insertion style transducer is made of stainless steel by casting. As the transducer's length A and the pipe wall's thickness B are known, and the length part of transducer left outside the pipe can be measured, the length of the inner part of the transducer can be calculated through the formula: L=A-B, C=0 Note: the length A of different types of transducers are: Standard insertion type B: A=170mm; Standard insertion type C: A=220mm, and Cement insertion type B: A=310mm. F Wiring After wires being connected, screw the mut on the hole for wires (do not lose packing seal),at ①transducer ②ball valve base ③tailor-made ball valve ④screw thread ⑤locknut ⑥connecting box ⑦signal cable
- 4. 4 last,screw seal cover tightly to prevent water leakage. G Transducer wiring picture H Hole-drilling Connect the sealed sheath of the hole-drilling machine and the outer screw thread of the tailor-made ball valves,screw tightly,open the ball valves,push the drill pipe to touch the outer surface of pipe; then the drill pipe shall be locked to the handle rotary drill before the drill is switched on. During drilling, the drill machine should work in a low speed to avoid sticking or even drill bit breaking.after drilling through pipe wall,pull back the drill pipe until the head of drill bit reach the ball valves spool,turn off the ball valves,take down hole-drilling machine. 3 In-line type transducer In-line type transducer of new MT-100F series is characterized by easy installation and high-accuracy measurement. When ordering, customers need to provide the actual parameters of the pipe. The parameters of the transducer have been put into the flowmeter before leaving factory and there is no need to input them when installing. There are two types of pipe transducers for selection: 1. π-type transducer(DN15-DN40MM) 2. Standard pipe transducer(DN50-DN1000MM) ①Pipe ②Ball valve base ③Tailor-made ball valve ④Locating drill pipe bit ⑤19 super hole cutter ⑥Seal gland ⑦Drill pipe ⑧Hole-drilling machine
- 5. 5 Parameters π-type transducer Standard pipe transducer Material Stainless steel Carbon steel(stainless steel is optional) Pipe size DN15-DN40MM DN50-DN6000MM Connection: Flange type Flange type Application of temperature -40℃～160℃ Protection class IP68(can work in water, and water depth≤3 meter) Rated pressure please refer to following table dimension please refer to following table Nominal diameter (mm)DN Rated pressure (Mpa) π-type Standard-pipe Flange dimension(mm) L1 L2 D D1 D2 f Ｎ-Φ Flange thickness 15 2.5 320 95 65 45 2 14×4 14 20 360 105 75 55 2 14×4 16 25 390 115 85 65 3 14×4 16 32 450 140 100 76 3 18×4 18 40 500 150 110 84 3 18×4 20 50 1.6 200 160 125 100 3 18×4 22 65 200 180 145 120 3 18×4 24 80 225 195 160 135 3 18×8 24 100 250 215 180 155 3 18×8 26 125 250 245 210 185 3 18×8 28 150 300 280 240 210 3 23×8 28 200 350 335 295 265 3 23×12 30 250 450 405 355 320 3 25×12 32 300 500 460 410 375 4 25×12 32 350 550 520 470 435 4 25×16 34 400 600 580 525 485 4 30×16 38
- 6. 6 400 1.0 600 565 515 482 4 25×16 30 450 700 615 565 532 4 25×20 30 500 800 670 620 585 4 25×20 32 600 1000 780 725 685 5 30×20 36 700 1100 860 810 775 5 24×25 32 800 1200 975 920 880 5 24×30 32 900 1300 1075 1020 980 5 24×30 34 1000 1400 1175 1120 1080 5 28×30 36 II installation method :Attention: 1,Do best to install transducers in the range of +/-45° of horizontal position of pipe axis . 2,Connect the mainframe enclosure with ground. 3, Avoid the installation place of flange,welding line,reducing 4, Enough installation room,convenient for people to stand up to work 1 Quickly input pipe parameter steps: Need input following parameters when normally measuring 1. pipe outer diameter 2. pipe wall thickness 3. pipe material 4. liner parameter(if has liner,then include liner thickness and sound velocity) 5. fluid types 6. Transducers type(mainframe can support many kinds of transducers) 7. transducers installation method 8. solidification parameter. :Remarks:users input transducers parameters by yourself 2 Installation space Installation space of clamp on type transducer is inner edge distance of the two transducers(face to face),after inputting the required parameters in Menu,check the display on M25,that is the installation space. 3 Installation method The method has 2 kinds: V method,Z method Normally,V method is suitable to the pipe diameters within the range: DN15-DN200mm .when using V method can not measure the signal or the signal is poor,try to use Z method that is suitable to the diameters are more than DN200mm or measuring cast iron. V method(commonly used method) Normally,V method is standard installation method,convenient to use with precise measurement,when installation,the two transducers horizontally align,its center line is
- 7. 7 horizontal with pipe axis line,suitable pipe diameter range to measure is DN15mm-DN400mm。 Z method (the most commonly used method) When the pipe diameter is wide,or there are suspended matters in fluid,too thick scaling or liner inside pipe inner wall,that can make the flow meter can not work normaly and signal poor by using V method installation,so need to use Z method to install,its features are direct transfering without reflection(called sigle sound path),little signal attenuation. Attention: 1,when installation,it is a must to clear the pipe area where to install transducers,showing metal color 2,shield line of ultrasonic signal cable can not be connected,but not short circuit with positive and negative pole(red and black line) 3,after transducers are connected with circuits,must apply enough sealant to prevent water in. 4,after covering the transducers,must screw and lock tightly the hole for shield line of transducers to prevent water in. 5,use strap(stainless steel band) to fix on the center part of transducers,to make it weighted uniform,no moving. 6,apply enough couplant around the area ，so that transducers touch pipe to prevent air,sands,rust in,that influence the beam transferring. 4 Locate the installation point Input the pipe parameters on the mainframe, the installation space L (L=inside diameter－9.113mm) will be calculated. (the two sensors must be located in the same axis plane), the installing space L should be the distance between the centers of the two sensors horizonally.
- 8. 8 A. Making a fixed position paper: take a 4D (D refers to the pipe inner diameter) long and 200mm (or D) wide rectangular paper (according to actual situation on spot, the paper tape can also be replaced by moisture-and-corrosion resistant materials), and draw a line about 100mm from the edge; B. Wrap the fixed position paper on the cleaned surface of the pipe, making sure that the two paper sides are overlapping and aligned and thus the line drawn may be parallel with the pipe axis; C. Extend the line on the fixed position paper to the pipeline and the cross-point between the vertical side of the fixed position paper and the extended line is A D. Starting from A and along the edge of the position paper, the length of half of the pipe perimeter is measured and the cross point is C; then draw a line at C to be parallel to the axis (that is, to be parallel with the line on the position paper); E．Removing the fixed position paper and starting from C, the installation space L should be measured along the line, draw on the pipe ,the point is B. Thus, A and B are the points where the transducers
- 9. 9 are to be installed. For example, L=280mm. Then two bases of ball valves should be welded respectively on A and B, making sure the centers of bases overlap A and B respectively. 5 Welding the base of the ball valves For pipes that can be welded (such as steel and stainless steel, etc.), just weld the base on the pipe (Stainless steel pipe should be welded to stainless base, please indicate in your order). Before welding, the rust and paint on the section where the sensors are to be installed shall be cleaned up by using an angle grinder, and the oil dirty and dust should be cleaned by using acetone or alcohol. to prevent water leakage,so the work of welding is very important, making sure the centers of bases overlap A and B respectively,no air bubbles. For pipes which material cannot be welded directly (such as cast iron and cement, etc.), special hoops (with airproof rubber pads) should be used. The bases of the ball valves have been welded on the hoops. These hoops are directly fixed on the pipe and make sure that the centers of the ball valves overlap A and B respectively. Finally, the ball valves should be closely fixed on the bases welded on the hoops to prevent water leakage. 6 Maintenance The maintenance is easy,exchange the old transducer with the new transducer according to the reverse process. Attention: 1 during the process of welding the base of the ball valves,avoid the phenomenon of slag inclusion,sand hole,water leakage. 2. The bases of the two ball valves should be welded on the same axis plane to prevent poor receiving of ultrasonic waves; 3. after The holes having been drilled through, the impurities such as iron filings in the ball valve should be cleaned up so that the transducer probe may not get stuck or its thread get adhered;if so,still to screw hardly,and do not stop,the transducer will be destroyed and not work well. 4. Make that the ultrasonic emitting surfaces of the two transducers are face to face (that is, the holes for wires are in the same direction and either upward or downward); 5. After the transducer is installed, the screw mut should be screwed tightly to avoid
- 10. 10 transducer move. The seal cover should be screwed tightly to prevent water after wires being connected.. 7 check installation of transducers After the completion of transducer installation, the user should check the following items to see whether the installation is suitable,whether the received ultrasonic signal is correct,enough strong,that could make the meter work normally and long time running. By checking the receiving signal strength S, the signal quality Q value, the delta time, , the transit time ratio R to assure whether the installation point is good or not. Normally,apply couplant on the transducers and attach them on the pipe ,so can obtain measurement results,but it is better to check followings to ensure the flow meter is working properly and the results are reliable and accurate. 8 Signal Strength Signal strength S (display on M90) indicates strength of sending and receiving signals from upstream transducer and downstream transducer by a 3-digit number. [00.0] means there is no signal detected, and [99.9] refers to the maximum signal strength that can be detected. When installation,do best to adjust the position of transducers and check whether the couplant is sufficient,to make sure to gain the strongest signal.Although the instrument works well when the signal strength ranges from 60 to 99,when the signal strength is too low,you should chech the installation position ,installation space,whether the pipe is suitable to install or change to install by Z method. stronger signal strength should be pursued, because a stronger signal means a stable measurement results,long and reliable running.. 9 Note the following questions when installing 1，input pipe parameters must be correct,conform to actual facts,otherwise the flow meter will not work. 2,when installing clamp on type transducers,apply enough couplant to make the transducers attach on the pipe,check the signal strength and signal quality displayed on the screen while moving the transducers around installation point to receive the best signal and signal quality.the diameter of pipe is more wider,the range of moving transducers is more larger.then ensure whether the installation space is the same with that on M25,whether transducers are installed in the same axis line of pipe.if the signal strength is 0.00,that means no receipt of ultrasonic beam,check whether the input parameters are correct or not, choosing installation method is correct or not,whether the pipe is too old,liner is too thick,is there fluid in pipe？the space is too near valves,angle head?too many air bubbles in fluid?if not these reasons,still no signal,so have to try another point,or use insertion type transducers. 3,ensure whether the flow meter work normally:signal strength is bigger,signal quality is higher,the displayed flow rate is more reliable,the meter can work for long time.if there is too bigger environment electromagnetic interference or lower receiving signal,then the flow rate displayed is poor,not be able to work normally for long time. 4,after installation,enter M26 to solidify parameters,power on again,check results are correct or not.