High pressure type turbine flowmeter

• 
• 

Type high pressure turbine flowmeter is adopted advanced ultra-low power consumption single chip mic…

Products overview: 
ZW - LW series high pressure type turbine flowmeterUSES the advanced ultra low power single chip microcomputer technology of turbine flow sensor and display integration of integrating new intelligent instrument, the double row at the scene of the liquid crystal display, with compact bodies, intuitive and clear reading, high reliability, without external power supply interference, lightning resistance, low cost, obvious advantages.Instruments have instrument coefficient of correction at six nonlinear intelligent compensation coefficient, and on-site correction.High-definition LCD display (four significant figures) instantaneous flow and cumulative flow (eight significant figures, with reset function).All valid data after 10 years is not lost when power supply drop.Turbine flowmeter are explosion-proof products, explosion-proof level for: ExdIIBT6.
Second, the working principle: 
ZW - LW series high pressure type turbine flowmeterThe working principle of shell is a fluid flowing through the sensor, as a result of the impeller blade and flow to a certain point of view, the fluid force makes the 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 the blade has a magnetic conductivity, 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 seriesHigh pressure type turbine flowmeter is a kind of precise flow measuring instrument, and the corresponding flow integrating instrument matching can be used to measure the rate of flow of liquid and total.Widely used in petroleum, chemical industry, metallurgy, scientific research in the areas of measurement and control system.Equipped with joint healthSensors can be used in the pharmaceutical industry.
Four, the main features: 
1, adopt new sensors, initiating flow, low pressure loss and vibration and pulsation flow resistance performance is good, not easy corrosion, good reliability, long service life. 
2, adopting new type of microprocessor chip with high performance, high computing precision, the whole machine powerful, superior performance. 
3, USES the advanced micro power consumption of new and high technology, low power consumption.Both can be used within the battery power supply to run for a long time, but also by external power supply mode. 
4, according to the frequency of flow signal, instrument coefficient can be divided into eight automatic linear correction, can improve the calculation precision of instrument according to the needs of users. 
5, block the EEPROM data storage technology, has the historical data storage and query function, three types of history data record way for users to choose. 
6 meter, flowmeter can be 180 ° rotation, installation is simple to use convenient. 
7, high accuracy, generally up to + / - 1.5%, plus or minus 1.0% R R. 
8, good repeatability, short-term repeatability could reach 0.05% ~ 0.2%, it is because of good repeatability, flowmeter in trade settlement is preferable. 
9, can be detected by measuring the temperature, pressure, and flow of the gas, can perform automatic tracking compensation, and displays a standard condition (Pn = 101.325 Kpa, Tn = 293.15 K) of the gas flow;Can be real-time query data such as temperature, pressure, time, date. 
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, to display, sensors can reach 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 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, 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, installation requirements:

1, before installation, pipeline purging, and in case of residual iron affect the normal operation of flowmeter.
2, before the installation, the use of tiny air blows the turbine, the turbine can flexible rotation, no random noise, count rotation is normal, uninterrupted card lag phenomenon, the flowmeter can be used to install.
3, in the middle of the flange and pipe flanges to add sealing washer.
4, before the gas meter shall be equipped with filters, temperament is dirtier occasions should add oil filter, before you place an order, can order to me at the same time, it is strictly prohibited to filter and flowmeter directly connected.
5, gas turbine flowmeter in the installation shall be added as of before and after the valve.
6, flange joint pipe Canon there should be no protrusions.
7, when installation, it is strictly prohibited in the import and export directly to where the flange welding, so as not to burn out flowmeter internal parts.
8, shall be installed in easy maintenance, strong electromagnetic interference and mechanical vibration and thermal radiation effects.
9, unfavorable use frequent interruptions in the flow, and have strong pulsation flow or pressure pulsation of the occasion.
10 and outdoor installation, should be the upper cover, to prevent rain water immersion and strong sunlight affect the service life of the meter.
11, can be horizontal or vertical installation, the fluid flow direction should be consistent with the direction of the logo on the shell, should guarantee the upstream of the flow meter is not less than 10 dn straight pipe, after the table is not less than 5 dn straight pipe.
12, in order not to affect the normal fluid transportation, it is suggested that according to the figure 2 by-pass pipe installation, must close the by-pass pipe valve when normal use.

Ten, use notice:
1, in the low pressure table z pressure leak detection: 1.0 Mpa, or less temperature pressure compensation type leakage pressure no more than three times the upper limit value of the pressure sensor.High pressure casing according to 1.2 times the rated flow pressure leak detection.
2, after installation leak test and installation shall comply with the following provisions:
A close vent valve and the inlet valve first.
B slightly open vent valve, and then slowly open the inlet valve, make the table start slowly, then slowly open the vent valve, make the reach normal operation state, to prevent sudden start, damage to the core.
C at the time of stopping air, need to close the vent valve, then close the inlet valve, each time you start all should abide by the rules.
After 3, install and use, not to touch the bolt, screw, nut fasteners, such as to avoid danger such as leakage, damage.
4, flow meter movement (temperament clean) should be once every six months for cleaning maintenance;(temperament is dirtier) should be cleaning maintenance once a month.
5, if the movement after breakdown maintenance, to be put into use, the need to press zui pressure seal test first.And note within the movement precision instrument transformer oil or oil.

Eleven, measurement range and working pressure:

1, ZW - LWGQ series gas turbine meter:

2Turbine flowmeter, ZW - LWGY series liquid:

Twelve, selection of coding:

1, LWQ series gas turbine flowmeter selection:

2, LWGY series liquid turbine flowmeter selection:

13, the design and order guidelines:
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.