Far eastone type turbine flowmeter

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Far eastone type turbine flowmeter is a kind of precise flow measuring instrument, matched with the …

Products overview:
ZW - LW seriesFar eastone type turbine flowmeterIs learned the flow meter at home and abroad advanced technology, optimized design has simple structure, light, high accuracy, good reproducibility, responsive, use the installation and maintenance is convenient wait for a characteristic of a new generation of turbine flowmeter, it is widely used in measurement in a closed pipe with 1 cr18ni9ti stainless steel, 2 cr13 and corrode corundum AI2O3, cemented carbide, and no fiber, particles and other impurities, motion viscosity temperature less than 5 x 10-6 m2 / s of the liquid, the kinematic viscosity is greater than 5 x 10-6 m2 / s of the liquid, can be used for solid liquid flow meter calibration after. If with display instrument with special function, can also be quantitatively controlled, excessive alarm, etc., is an ideal instrument to flow measurement and energy saving.

Second, the working principle:
ZW - LW seriesThe working principle of remote transmission type turbine flowmeter 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 seriesFar eastone type turbine flowmeter is widely used in petroleum, chemical industry, metallurgy, water supply, paper making, environmental protection, food and other fields, mainly is suitable for the measurement in a closed pipe and stainless steel and corrode fused alumina, tungsten carbide, and no fiber, particle impurities such as liquid.If with display instrument with special functions, can automatically quantitative control, such as excessive alarm purposes.
Four, the main features:
1, sensor is cemented carbide bearing thrust type, not only guarantee the accuracy, and improve the wear resistance.
2, simple structure, strong and tear open outfit is convenient.
3, wide measuring range, low threshold velocity.
4, small pressure loss, good repeatability, high precision.
5, have a high resistance to electromagnetic interference and vibration resistance.
Five,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:
The intelligent flowmeter is the use of advanced single chip microcomputer technology design of the new display instrument of the flow meter, 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, the use of turbine flow sensor z big 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, the installation place:
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.

Nine, use notice:
Measured liquid 1, when using, should maintain clean, do not contain impurities such as fiber and particles.
2, sensors, at the beginning of the use should be to slowly filled with liquid sensor, and then open the outlet valve (the valve should be installed in the back-end flow meters), it is strictly prohibited to sensors in liquid state under high velocity impact.
The maintenance period of 3, sensors, generally for half a year.Maintenance when cleaning, please note that you are the measuring chamber of damaged parts, especially in the impeller.Please watch the orientation and the position of the impeller when assembling.
4, sensors, need not when, should be clean inside the liquid, dry and after on both ends of the sensor and protective cover, prevent dirt to enter, and then placed in a dry place preservation.(this is very important)
5, with the filter should be cleaned regularly, need not when should clean the internal liquid, like sensors, dustproof set, placed in a dry place preservation.
6 transmission cables, the sensor can be raised or buried (buried iron pipe should be set.
7, in front of the sensor installation, and the first display instrument or oscilloscope connected wires, power supply, with my mouth to blow or hand dial the impeller, make its rapid rotation observations have showed that sensor installation again when have shown.If no display, should check the relevant parts, troubleshooting.

Ten, measurement range and working pressure:

1, ZW - LWGQ series gas turbine meter:

2Turbine flowmeter, ZW - LWGY series liquid:

Eleven, selection of coding:

1, LWQ series gas turbine flowmeter selection:

2, LWGY series liquid turbine flowmeter selection:

Twelve, 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.