Clamp metal pipe flow meter

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ZW - LZ50M seriesClamp metal pipe flow meterAlso called health type tube flow meter, measuring princ…

ZW - LZ50M seriesClamp metal pipe flow meterAlso called health type tube flow meter, measuring principle is to use variable area type, for a variety of fluid flow measurement and control.This series of flowmeter is mainly composed of connection type fast loading chuck, the measuring tube body, conical float and indicator and other parts, because with different indicators, which can realize the pointer instructions, (4 ~ 20 mA analog output, LCD display instantaneous and cumulative flow, upper and lower alarm, HART protocol communication, batteries and flame-proof etc. Function.
Second, the structure and working principle:
1, the structure:
Is mainly composed of three parts:
A, indicator (intelligent indicator, on-site indicator);
B, float;
C, tapered measuring room.
2, how it works:
ZW - LZ50M series clamp metal pipe flow meterOf bottom-up measured medium by the conical float to the top and bottom side of the differential pressure measurement of a tube to form the rising force, when the float upward force is greater than the baptism by float weight in the fluid, float up, clearance area increase, immediately drop the gaps in the fluid flow, float up and down the differential pressure is reduced, on the float upward force as well as to reduce, until the upward force equal to the float weight immersed in the fluid, the float is stable at a certain level.The discretion of the float position that corresponds to the size of the measured medium flow.Move up and down in float float the built-in magnet steel, medium, magnetic field changes with the movement of the float.
Type a, for in situ by in situ indicator of the rotating magnet steel and the float inside the magnetic coupling, and turning, drives the pointer at the same time, through the dial indicates the size of the flow at this time.
B, for intelligence, an intelligent indicator in the solid state magnetic sensor to the change of the magnetic field into electrical signals, after A/D conversion, microprocessor, D/A output, LCD liquid crystal display (LCD), to show the size of the flow rate and cumulative flow.
Applications:

ZW - LZ50M seriesClamp metal pipe flow meter is suitable for small flow and low the number of ray's medium flow measurement, is widely used in food, chemical industry, petroleum, metallurgy, electric power, environmental protection, pharmaceutical and light industry and other departments for liquid flow measurement and automatic control.
Four, product structure:
1, adopts full metal structure, there are regular, damping, high temperature and high pressure.
2, according to the customer, sounding pipe structure can be divided into: in the out, down into the cross out, cross into cross out, right to left, left to right.
3, this series of metal tube float flow is mainly composed of two parts: the measuring tube and indicator.Sounding pipe including the taper pipe or orifice plate, guide, stop, float parts, such as indicator including magnetic servo system, a pointer, dial, lines and other components.
Five, the main features:
1, suitable for small diameter and low velocity medium flow measurement;
2, reliable operation, less maintenance, long service life.
3, for the straight pipe requirements is not high, wide flow than 10:1
4, double line LCD display, optional site, according to the instantaneous/cumulative flow can take backlight;
5, uniaxial sensitive indicator;
6, all-metal structure, suitable for high temperature, high pressure and strong corrosive medium;
7, can be used in inflammable and explosive dangerous places.
Six, the technical parameters:
1, the measuring range: water (20 ℃) 60 ~ 55000 l/h see flow;
2, range than: standard 1:10;
3, fine degree: 1.5 on the Richter scale;
4, pressure rating: DN25 ~ DN100 PN0.6;
5, installation forms: on the bottom of the vertical installation media into the;
6, the pressure loss: 7 kpa to 70 kpa;
7, medium temperature: standard: - 80 ℃ ~ + 200 ℃;
8, medium viscosity: DN25: < 250 mpa. S;
DN50~DN100: ＜300mPa.s；
9, environment temperature, liquid crystal type - 30 ℃ ~ + 55 ℃;
10, a pointer type: - 40 ℃ ~ + 120 ℃;
11, fast connection forms: chuck;
12, cable interface: M20 x 1.5;
13, power supply: standard 24 VDC two wire 4 ~ 20 ma (10.8 VDC ~ 36 VDC);
14, ac type: 85 ~ 265 vac 50 hz;
15, battery type: 3.6 V @ 4 ah nimh batteries;
16, alarm output: the upper or lower limit instantaneous flow alarm;
17, standard: open collector output (100 ma @ 30 VDC internal impedance euro 100);
18, special type: relay output (contact large capacity 5 a @ 250 vac);
19, pulse output: cumulative pulse output, small interval 50 milliseconds;
20, liquid crystal display: instantaneous flow display scale: 0 ~ 50000;
21, the cumulative flow display scale: 0 ~ 99999999;
22, protection grade: IP65;
23, explosion-proof marks: this Ann type ia Ⅱ CT6 flameproof d Ⅱ BT4.
Seven, transform indicator:
Converter is actually change the height of the cone tube float into the corresponding scale of volume flow.On the output signal of points: there is local display and remote transmission signal output:
1, on-site display type: by in situ indicator of follow-up magnetic steel and the float inside the magnetic coupling, and turning, at the same time, through dial, electric pointer indicates that traffic at this time
Type 2, intelligent remote transmission, by intelligent indicator of follow-up magnetic steel and the float inside the magnetic coupling, and the rotation, sensing magnetic steel and pointer at the same time, through A magnetic sensor to magnetic field changes into electrical signal, after the A/D conversion, digital filtering, microprocessor processing, D/A output, LCD liquid crystal display (LCD), to show the size of the instantaneous flow and cumulative flow.
Eight, flowmeter type:
1, the metal tube flowmeter products according to the direction of the fluid inlet and outlet will be divided into five types: vertical, horizontal (and the level of T type, horizontal spring type) and bottom type in side out, side in side out, side in top out, and each type has a standard type, high temperature, clamp cover model, etc.
2, when the diameter is less than the horizontal type flowmeter ((including), choose T structure, when more than (with spring design.
3, flow meter connection specification: standard adopted GB/T9119-2000 standard flange, flange standard according to customer demand production;Also can choose threaded connection, clamp connection mode.
Magnetic filter:
If the medium containing ferromagnetic particles, magnetic filters should be installed at flowmeter before entry.

Nine, troubleshooting methods: 
1, check alarm value set size in the SU. 
2 d values cannot too big, check the deviation. 
The logical function, FUN, whether it is right.HA - A said cap is logical.LA -a said the lower limit is logic 
4, circuit board fault, replace the circuit board. 
5, if the LCD bar code instructions correct output without action, can check whether the external power supply and external power of the cathode is connected to the instrument power supply of the cathode. 
If metal pipe flow meter in use dithering, could be determined according to the extent of jitter is what range of jitter.Jitter is divided into slightly shaking, moderate jitter and violent shaking. 
1, the slight shaking: generally caused by fluctuations in medium.Can be used to increase the damping ways to overcome. 
2, moderate jitter: generally caused by medium flow state.Is often caused by unstable operating pressure of medium for gas.Can use voltage or current regulator devices to overcome or increase the instrument air damping. 
3, intense shaking, mainly due to the medium pulse, pressure instability or users are given gas pressure, temperature and flow of the operating state of inconsistent with the actual state of instrument, have bigger difference meter range. 
Metal pipe flow meter as long as the use method is correct, pay more attention to maintain at ordinary times, can ensure the normal use of it.

Ten, product maintenance: 
1, in the long-term use process, the pipe will inevitably have a ferromagnetic impurity adsorption on the float, it would float jammed or affect measurement accuracy, need to clean them often float inside the sensor;If the installation of magnetic filter, also want to make regular cleaning. 
2, instrument indicator is equipped with electronic components, instrumentation connection or remove the shell and the screw to tighten, must ensure that shell sealing, to prevent impurities, or other material into the water, but also ensure the reliable earthing of the instrument housing. 
3, meters installed, in * times when using, should pay attention to: 
Open valve to avoid pressure impact spacing device to float against, causes the damage of instrument, must open the valve slowly!
Measuring gas meter is equipped air damper, zui to large extent reduce the oscillation of the float;In order to ensure the stability of float, and can be installed in the export of instrument a throttle valve. 
4, for remote transmission type instrument, first of all to ensure the instrument connection right after, can live;For the dangerous situation, must choose explosion-proof type, use and install according to the requirements of explosion-proof.

Eleven, notable matters of installation:
1, before installing the flowmeter, first the stolen goods, within the pipeline welding by impurities such as blowing clean, if the solid impurities in the liquid, should be installed between the valve and the straight pipe corresponding filter.
2, shielding and grounding: in order to guarantee system of electromagnetic compatibility of the ideal, shielding and grounding is very important, especially the bus cable, to make the cable shielding as continuous as possible.
3, for safety, cable to be in accordance with the requirements for routine ground as soon as possible.
4, in dangerous places, to ensure that within the scope of the whole bus safety and danger all enough potential, such as matching, in this case, the multiple ground is very superior.

Twelve, flow parameter list:

13, selection of coding:

14, design selection and order items:

1, according to the measurement of fluid is a gas or liquid, correct choose ZW - LZ series metal tube flowmeter.

2, be no corrosive choose normal flow corrosive choose corrosion type.

3, when placing order, please indicate the name of the measured medium, flow rate, pipe size and working pressure, temperature, density, viscosity, and so on and so forth.According to density of scale revised by the user, making special flow scale.

4, according to the measuring range of the measurement of body, applications, and choose the right type of specification varieties.If you have any special requirement of the flowmeter, company or calls, please contact the sales department.

After-sales service commitment:

1, from the date of signing of the contract, I in the way provided for products of the company offers free maintenance and maintenance service, commitment to lifelong maintenance service;

2, jiangsu wei measurement and control instrument co., LTD. Sales manager will be in regular contact with customers, understand the usage of products, and solve the problems of the customers to use in the process of produce, free of charge to provide technical support;

3 the man-made damage is found, the warranty period, our company is responsible for the maintenance, and the resulting maintenance fee;

4, product quality problems or are not satisfied with product, the user can choose unconditional return, wei tt&c don't charge any fees, appear quality problem, bear the freight back and forth.