Intelligent turbine flowmeter

Products overview:
ZW - LW seriesIs to adopt advanced technology of ultra-low power consumption single chip microcomputer of the vortex flow sensor and display the integration of integrating new intelligent instrument, adopts double row at the scene of the liquid crystal display, a compact bodies, intuitive and clear reading, high reliability, without external power supply interference, lightning resistance, low cost, obvious advantages.Instrument instrument correction coefficient of three, nonlinear intelligent compensation coefficient, and on-site correction.High-definition LCD display (four significant figures) instantaneous flow and cumulative flow (eight significant figures, with the function of reset.
Second, the working principle:
ZW - LW seriesIntelligent turbine flowmeter measurement principle is a fluid flowing through the sensor shell, as a result of the impeller blade and flow to a certain point of view, the impact of fluid blade with rotational torque, to overcome the friction torque and fluid resistance, blade rotation speed stability after the moment balance, under certain conditions, the speed is proportional to the velocity of flow, because there are magnetic conductivity blade, it is in the signal detector (composed of * magnetic steel and coil) magnetic field, rotating blade cutting lines, periodically changing coil magnetic flux, so that the coil ends induction electrical pulse signal, the signal after amplifier amplification plastic, form a certain amplitude of continuous rectangular pulse wave, can be spread far to display instrument, show the instantaneous flow and cumulative amount of fluid.Within the scope of a certain flow, pulse frequency f and flows through the sensor of fluid is proportional to the instantaneous flow rate Q, flow equation is: Q = 3600 x f/k;Type:
F - pulse frequency (Hz);
K - the instrument coefficient of sensor 1 / m3, given by the check list.If [1 / L] as the unit
Q - fluid transient flow (working conditions) (m3 / h),
3600 - conversion factor.
Coefficient of each sensor of the instrument in the calibration certificate will be completed by the manufacturer, set into the display instrument of form a complete set of k value, can show the instantaneous flow and cumulative total.
Applications:
ZW - LW seriesIntelligent sensor and display instrument of turbine flowmeter of form a complete set of turbine flowmeter.Sensor has high precision, good repeatability, long life characteristics such as simple operation.Can be widely used in petroleum, chemical industry, metallurgy, paper making industries such as measuring fluids, the volume of a gas transient flow and the total volume.
Four, the main features:
1, small pressure loss, impeller has antiseptic function;
2, USES the advanced ultra low power single chip microcomputer technology, the machine has strong function, low power consumption, superior performance.
3, which has the function of nonlinear compensation accuracy intelligent traffic monitor.The accuracy of correction formula is better than that of plus or minus 0.02%
4, meter coefficient can be set up by the key online and can be displayed on the LCD screen, LCD screen clear intuitive, reliability
Block 5, the EEPROM to cumulative flow, instrument coefficient of power-fail protection, protection for more than 10 years
6, using central processing unit (CPU), high performance MCU to complete data collection, processing and display output of cumulative flow with transient flow
7, convenient screen man-machine interface to realize, in the form of standard 485 for data transmission.
8, the whole hard alloy (tungsten carbide) shielding cantilever beam structure bearing, integrating rotating bearing with pressure bearing, bearing life can be greatly improved, and can work in a small amount of sediment and dirt in the medium of.
9, with 1 cr18ni9ti stainless steel construction and all (turbine adopts 2 cr13) anti-corrosion performance is good.
10, easy maintenance, since the structure of the rectifier, smaller and lighter, simple structure, can be combined in a short period of time to open it, inside clean and simple.
11, have a stronger ability to resist magnetic disturbance and vibration, reliable performance, long service life, lower limit of low flow velocity, wide measurement range;
12, the LCD shows clear intuitive display type, low power consumption, 3 v lithium batteries can run continuously more than 5 years;
13, corrosion resistance, suitable for acid and alkali solution.
Five, the technical parameters:
1, the nominal diameter: pipeline: DN4 DN200 ~;Insert: DN100 ~ DN2000;
2, precision grade: pipeline: plus or minus 0.5, plus or minus 1.0 on the Richter scale;Plug-in: 1.5 mm, 2.5 mm;
3, environmental temperature: - 20 ℃ to 50 ℃;
4, medium temperature: liquid measurement: - 20 ℃ ~ 120 ℃;Measuring gas: - 20 ℃ ~ 80 ℃;
5, the atmospheric pressure: 86 kpa to 106 kpa.
6, nominal pressure: 1.6 Mpa, 2.5 Mpa, 6.4 Mpa, 25 Mpa;
7, explosion-proof level: ExdIIBT4;
8, connection mode: threaded connection, flange clamp outfit, flange connection, plug, etc;
9, straight pipe requirements: gas: a straight pipe upstream should be 10 or more dn, downstream straight pipe should be 5 or more dn.
Liquid: straight pipe upstream should be 20 or more dn, downstream straight pipe should be 5 or more dn.
Plug-in: straight pipe upstream should be 20 or more DS, downstream straight pipe should be 7 or higher DS (DS for pipeline measured diameter);
10, display mode: (1) far eastone show: pulse output, the output current (match display instrument);
(2) the scene showed that eight LCD display cumulative flow, unit (m3);
Four transient flow, LCD display unit (m3 / h), battery, frequency, flow velocity;
(3) the temperature and pressure compensation type:
A, according to standard criteria for instantaneous flow and cumulative flow;
B, show the current pressure, temperature, battery voltage;
11, output functions:
(1) pulse output, p - p values determined by power supply;
Two wire (2) 4 ~ 20 ma current output;
(3) pulse output per unit volume and the original pulse sensor output;
(4) with RS485 communication interface;
12, power supply:
(1)DC5～24V；
(2) the standard 3 v lithium battery installed on the instrument internal can use eight consecutive years;
(3) temperature pressure compensation type 3 v lithium battery installed within the instrument can be continuous use of more than 4 years;
13, transmission distance, sensors to display the distance up to 500 m.

Six, instrument type:
A, the scene display type:
Is the use of advanced single chip microcomputer technology to design a new type of flowmeter display instrument, and the flow sensor of pulse signal output (such as turbine, vortex.).It can display instantaneous flow and cumulative amount.Cumulative flow: eight digit, decimal point three significant figures.Instantaneous flow: six figures, but showed a litre.Display precision: plus or minus a display unit.Signal output: pulse output: 1 ~ 3000 hz for + 12 ~ + 24 VDC power supply output current: 4 ~ 20 ma away for + 24 VDC power supply (two wire system) built-in 2 section 3 v lithium battery power supply in parallel.When the voltage is lower than 2.7 V, the under-voltage directives flameproof.Small signal removal function.
B, pulse output type:
Working voltage: + + 12 VDC or 24 VDC two (customer order must be selected before a power supply).Signal transmission distance: less than 250 meters.Output signal, square wave signal amplitude: + 12 VDC power supply amplitude is about 10 v + 24 VDC power supply amplitude of about 20 v: amplifier and turbine flow sensor connection for the M16 x 1.5 thread, after the turbine flow sensor installation, twist to the turbine flow sensor, the amplifier with the hａnd twist to sense amplifier and then take the lock nut.Connection: type pulse output amplifier foreign lead with three root, red, white line and shielding.Is the power supply line, white line for pulse output and display, or other equipment connection, shielding grounding
C, 4 ~ 20 ma output type:
Outside the working voltage: 24 VDC power supply + (two wire system) output signal: 4 ~ 20 ma, or 1, 4-5 v ma corresponding to zero flow turbine flow sensor, 20 ma for turbine flow sensor zui large flow, flow range turbine flow sensor nameplate.Signal transmission distance: less than 250 meters.After the installation of turbine flow sensor installation, twist the amplifier to the turbine flow sensor (m16 x 1.5 thread), joint hands after twist to the sense amplifier has exactly bring tight lock nut.Connection: 4 ~ 20 ma output type amplifier foreign fuses with the red and white line.The red line for the power cord, white line for line.
D, fission remote display type:
Outside power supply working voltage: 220 vac signal transmission distance: less than 250 meters display instantaneous four: accumulative total nine display display size: horizontal type: 160 mm x 80 mm upright: 80 mm x 160 mm display with 4 ~ 20 ma output and can be connected to the computer.
Seven, wiring and grounding considerations:
Wiring matters needing attention:
1, using a full cable as soon as possible.
2, should as far as possible away from electrical noise (such as power transformer, electric motor and the power cord), avoid parallel to the power the power cord wiring.
3, Suggestions in the end of the thick wire adopts the tin welding clamping lugs.
4, for the waterproof and mechanical damage, the cable into the metal tube inside, but may not have high power transmission cables, within the same catheter (a transmission cable transmission of zui power is greater than the flowmeter signal transmission cables zui small power 10 times, both cannot be installed on the same catheter).
5, the existing strong magnetic field outside the area, should make the axis of the detection device with the outside world vertical or the direction of the magnetic flux of the magnetic field with high permeability material for shielding flow sensor or external magnetic source.
6, explosion-proof type turbine flow sensor cable connection, must strictly abide by the relevant standards of explosion-proof amplifier.
Grounding problem:
1, the shielding wire can only be grounded at one end, on display instrument grounding.
2, reliable grounding should be good, explosion-proof type grounding resistance should be less than 10 Ω.
The use of turbine flow time must pay attention to the points:
1, requires clean measured medium, low viscosity, corrosion resistance is small, do not contain impurities, in order to reduce the wear of bearing.If the liquid to be measured a grudge or containing gas, the flowmeter before venting device.In order to avoid damage of impurity in the fluid into the transmitter devious, and in order to prevent turbine stuck, add filters when necessary.
2, the installation of the flowmeter should avoid vibration, avoid magnetic field and thermal radiation.
3, medium density and viscosity changes have an impact on flow value, should be revised if necessary.

Eight, select request:
1, according to the measurement objective requirements:
Asked to choose with instantaneous flow and cumulative flow (cumulative flow), flow display units, measurement accuracy, repeatability, linearity and flow range and scope of degrees, measuring temperature, pressure, temperature, pressure loss compensation, output signal characteristics and the response time, etc.Different objects have their respective measurement purposes, have different emphasis on its performance in the instrument.
2, measuring dielectric properties requirements:
Chemical corrosion and fouling, chemical sometimes become the fluid selection determinants of measurement and instrumentation.Some fluids will cause corrosion instrument contact parts, surface precipitation scale or produce electrolytic metal surface crystal chemistry.
3, the measured medium group phase:
According to the measured medium is single phase change medium or measuring multiphase and multicomponent flow should be treated with caution.Turbine flowmeter to measure individual clean medium, the electromagnetic flowmeter can measure the solid liquid two phase mixture medium, etc.
4 and compression system and other parameter requirements:
Measuring gas need to know the compression coefficient values, in order to calculate the working status of fluid density.Component fixed fluid density by pressure, temperature and the compression coefficient calculation;Composition changes of fluid and work in close to the supercritical zone (or in), online measuring density should be taken into account.
5, measurement accuracy requirements:
It is necessary to define the measurement accuracy of the overall requirements and is in a particular flow, or in a * scope internal temperature and pressure changes and significant change, its value is generally low, and the difference between all kinds of gas is very small.
Nine, choice of economic factors:
Economics considers only the instrument purchase expense is not comprehensive, but should also investigate other fees, such as accessories purchase expense, installation, maintenance and calibration of flow (or verification) cost, operating cost and spare parts, etc.
1, the installation cost
Online measurement method needs a long straight pipe upstream and good flow state to guarantee good performance measurement.Correct installation may have additional pipeline layout or equipped with bypass pipe for regular maintenance.
2, operation cost
Flow meter operating cost is mainly energy consumption at work, in the process of the measurement and push the energy dissipations of the fluid through the instrument, which overcome the instrument for measuring pressure loss of pumping can cost.Pumping cost is a cost of concealment, often ignored.
3, calibration fee
That depends on the checkout lines and checking instrument accuracy requirements.
4, maintenance costs
Instrument installation fees required to keep the measurement system work normally after put into use, mainly including maintenance services and spare parts cost.
5, the spare parts cost and can be purchased
Spare parts costs generally increase with the degree to improve the performance of instrument.

Ten, installation site:

1, the installation site should comply with the environmental temperature at 25 ~ 55 ℃ scope, humidity < 80% RH;

2, well ventilated, avoid sun and rain;

3, avoid in piping vibration or the place of stress;

4, avoid easily affected by the strong thermal radiation and radioactive places;

5, must avoid the outside strong electromagnetic field disturbance to the detection signal.If unavoidable, should be set on the amplifier of the flowmeter (sensor) shield and other measures to eliminate interference;

6, in the places where requires explosion-proof, and isolation amplifier should be adopted;

7, the installation position should consider ease of installation, operation, maintenance.

Eleven,Installation note:
1, the liquid flow direction when installation should be direction of arrow and indicating flow sensor shell, and the straight pipe upstream should be 20 or more dn, downstream straight pipe should be 5 or more dn (dn for pipe diameter);
2, the sensor should be far away from the external magnetic field, such as can not avoid turbine flowmeter selection:
3, in order to not affect the normal delivery of the liquid, maintenance should be straight section on opposite sides of the sensor installation outside the by-pass pipe;
4, sensors, outdoor installation time, please prepare amplifier plug waterproof processing;
5, sensor and display instrument connection, should choose connection mode according to the power of the amplifier.

Twelve, storage precautions:
Turbine flowmeter arrival should be installed in a timely manner.For a battery-powered LRT -i header, not when using the power pin should be placed in the "OFF" (OFF) position, so as to avoid battery depletion affect the service life of the battery.If you want to deposit, please pay attention to the following items:
1, the possible conditions, do not open the packing cases.
2, if already opened the package, or have used the instrument, please put the LRT -i header power jumper wire inserted in the "OFF" position, and use the original packaging.
Location should meet the following conditions:
3, waterproof moisture-proof.
4, small mechanical vibration, avoid collision.
5, temperature in - 30 ~ + 60 ℃.The ideal temperature at 25 ℃ or so.
6, such as stored in outdoor, instrument performance will be affected.So if the instrument to the installation location, will install as soon as possible.

13, measurement range and working pressure:

1, ZW - LWGQ series gas turbine meter:

2Turbine flowmeter, ZW - LWGY series liquid:

14, selection of coding:

1, LWQ series gas turbine flowmeter selection:

2, LWGY series liquid turbine flowmeter selection:

15, design and ordering information:
1, you should pay attention to when ordering turbine flow sensor based on fluid nominal diameter (DN), work pressure (Mpa), temperature (℃), the flow range (m3 / h), fluid types and environmental conditions to choose the appropriate specifications.When have explosion-proof requirements must choose explosion-proof type sensor, and strict attention to explosive-proof grade.
2, need to jiangsu wei display instrument of form a complete set, please refer to the corresponding specifications, choose suitable model, or the information provided by our company technical personnel according to your designs for you selection.Indicate the specifications when you need to use the transmission signal cable length.

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.