Complaint
Chongqing Hongxing Instrument Co., Ltd. was established in 2011, is a professional engaged in industrial automation instrument research and development, production, sales, service as one of the high-tech industrial enterprises. The company has introduced advanced technology from developed countries, combined with its own years of industry experience, developed and developed a variety of automatic control instruments and industrial automation engineering instruments, automatic control system, used in metallurgy, chemical industry, electric power, light industry, pharmaceutical, paper and other industries.
The company adheres to the principle of people-oriented and meritocratic employment, and provides various opportunities for employees to further study and pay attention to improving their professional knowledge and vocational skills. The development of the enterprise and employee career planning combined, fully mobilize the enthusiasm of employees, in the enterprise to create a unity, persistent, vigorous good working atmosphere.
Hongxing Instrument adheres to the business purpose of "brave innovation, the pursuit of excellence, excellence, customer service", adheres to independent research and development, and intends to create a first-class brand of "intelligent made in China, created in China", to break the monopoly of imported equipment in the domestic market. Contribute to the modernization of industrial enterprises.
HXT200 series sensors are dry ceramic capacitive pressure sensors which are made of ceramic materials and refined by special process by E+H Company. Ceramic is a kind of recognized high elasticity. Resistant to corrosion. Resistant to wear and tear. The thermal stability of ceramic capacitors enables the temperature range to be as high as -40-120, with high precision measurement. High stability. Its biggest characteristic is that the range can be as small as 700a. the anti-overload capacity can reach 100 times of the range, completely solve the other types of sensors without a small range and in a small range when the overload capacity is poor shortcomings, in addition to the range of the general sensor, its most distinctive positive and negative gauge pressure function. The whole machine has been strictly assembled and tested. It has advanced design principle, complete varieties and specifications, easy installation and use, beautiful appearance and so on. In order to meet the demand of domestic automation level, the intelligent series developed by our company is a kind of intelligent transmitter which is suitable for Chinese national conditions, and has very strong use value. At present, this series of products have been widely used in petroleum, chemical industry, metallurgy, electric power, food, paper, medicine, machinery manufacturing and other industries.
A. Technical specifications
measured medium: liquid, gas, steam.
using conditions: temperature: - 20 ºC ~ 100 ºC; Humidity: The air relative humidity ranges from 0 to 100%.
precision: regular + / - 0.25%; Plus or minus 0.1%
measuring range: 0 ~ 0.16 KPa to 0 ~ 4 mpa.
power supply: 12 ~ 36 VDC. (Standard 24VDC)
output signals: 4 ~ 20 madc.
the positive and negative migration: the most-positive transfer 500% of the minimum school tuning range; The maximum negative transfer is 600% of the minimum adjustment range.
vibration impact: in any axis upwards, the vibration frequency of 200 hz, the cause of error is the biggest range of plus or minus 0.05% / g.
installation location: the biggest can produce 0.24 KPa zero error, but the adjustable, has no impact range.
HX series capacitive differential pressure/pressure transmitter is our company introduced foreign advanced technology and equipment, absorb foreign advanced technology manufacturing products. The key parts and electronic components of the transmitter are made of high quality products, whose performance is consistent with the advanced similar products abroad.
Capacitive differential pressure/pressure series transmitters are divided into HX analog type and HXS intelligent type, which are characterized by reasonable design, complete varieties and specifications, convenient use, explosion-proof and so on. They are especially famous for high precision, small size, beautiful appearance, stable and reliable. Widely used in petroleum, chemical, metallurgy, electric power and other industries.
HXS series intelligent transmitters are divided into two categories: push-button type and HART protocol manual operation type.
The push-button intelligent transmitter is manually operated by the buttons on the panel, and the LCD Chinese menu prompts the user to complete the test, configuration, formatting and zero range fine-tuning functions by simply operating the buttons on the panel and operating in accordance with the method suggested by the menu. The transmitter can be tested, adjusted and passive configuration (range migration) without special instruments. It is simple, convenient, economical and practical to use.
HART protocol manual intelligent transmitter conforms to the HART protocol, and can be connected with a variety of intelligent transmitters with HART protocol functions at the terminal point of the loop. Users use the HART338HART protocol manual operator provided by our company to manage, adjust passive configuration (range migration) and monitor process variables, and use 41/2 bit full Chinese menu display. It is easy to operate and intuitive to use.
overview
HX3052 multi-parameter transmitter is a new type of intelligent transmitter which integrates differential pressure, pressure, temperature transmitter and flow integrator. Display pressure, differential pressure, temperature, instantaneous flow and cumulative flow at the same time. Can replace intelligent differential pressure transmitter, pressure transmitter, temperature transmitter and flow integrator 4 instruments.
Easy to install, no need to debug, install can be used. And can automatically calculate the temperature and pressure compensation for gas, steam and other media, and realize the direct display of parameters such as standard flow rate. The multi-parameter transmitter works with 24V power supply and built-in lithium battery. In the case of external 24V power supply, it can provide current 4-20mA(two-wire system) or RS485(four-wire modbus-rtu system) for remote transmission.
The multi-parameter transmitter can be directly matched with any differential pressure type standard throttling device (V cone flow sensor, orifyplate flow sensor, elbow flow sensor, nozzle flow sensor, Venturi single flow sensor, Aniuba flow sensor, Weiba flow sensor, Bitoba flow sensor, wedge flow sensor, Delta flow sensor, uniform pitot tube flow sensor, etc.) Used to form a multi-parameter differential pressure flowmeter (V cone flowmeter, orifice flowmeter, variable tube flowmeter, nozzle flowmeter, venturi flowmeter, A Niuba flowmeter, Weiba flowmeter, Bitoba flowmeter, wedge flowmeter, Delta flowmeter, uniform pitot tube flowmeter, etc.).
The introduction of multi-parameter transmitter brings a revolution of differential pressure flowmeter, which is more convenient for customers to use. This kind of multi-parameter transmitter has made a major breakthrough in the micro power consumption (built-in lithium battery can be self-powered for 2-3 years) range ratio (up to 1:500) micro differential pressure (10pa-1500pa).
Suitable for all differential pressure flow sensors
It can be powered by battery and can work for 2-3 years without external power supply on site (no output).
Full isolation output super anti-interference design, shielding all interference
Power supply 24VDC(4-20mA two-wire system or RS485 communication four-wire system)
Built-in temperature and pressure sensor
Automatic temperature and pressure compensation for gas and steam
The range ratio is 1:2000/1:4000/1:500
Precision class 0.25
Gas can display temperature, pressure, standard flow and other parameters
Steam can display temperature, pressure, mass flow and other parameters
The flow sensor linearity can be corrected in ten stages
Differential pressure can be measured at a minimum of 10Pa
Users do not need to do any debugging installation to use high reliability, users do not need to do any maintenance
overview
There are many ways to measure the flow of the medium through the pipeline, but the most widely used and common is the differential pressure flowmeter. It is composed of throttling device and multi-parameter transmitter or differential pressure transmitter together with the secondary table, the throttling device is a differential pressure measurement component, people use it in the pipeline to make the fluid pressure difference, the use of the pressure guide tube before and after the throttling device produced by the differential pressure transfer to the multi-parameter transmitter or differential pressure transmitter, and then input to the secondary instrument, It shows the instantaneous flow or cumulative flow of the fluid in the pipe. Throttling device has a long history and has been standardized both at home and abroad. Throttling device includes standard orifice plate, spray
Mouth, non-standard orifice plate, etc. Can measure the flow of liquid, steam, gas, it is widely used in petroleum, chemical, metallurgy, electric power, light industry and other sectors.
Working principle
When the fluid filled with pipe flows through the throttling part in the pipe, the flow rate will form a local contraction at the throttling part, so the flow rate increases, the static pressure decreases, and the pressure difference is generated before and after the throttling part. The larger the fluid flow rate, the larger the pressure difference, so that the flow rate can be measured according to the pressure difference. This measurement method is based on the flow continuity equation (law of conservation of mass) and Bernoulli equation (law of conservation of energy). (The pressure difference depends not only on the flow rate but also on many other factors. For example, when the form of throttling device or the physical properties of the fluid in the pipeline (density, viscosity), the pressure difference produced at the same flow rate is different.) So by measuring the differential pressure, the flow rate can be measured.
characteristic
Throttle device structure is easy to copy, simple, firm, stable and reliable performance, long service life, low price.
Orifice plate calculation adopts international standard and processing.
All single-phase flows can be measured and some miscible flows can be applied.
Standard throttling devices can be used without real current calibration.
One type orifice plate is simple to install, no pressure tube, can be directly connected to the differential pressure transmitter and pressure transmitter.
Structure type
Angular pressure standard orifice plate belongs to standard orifice plate. It is also divided into ring chamber pressure and separate hole Angle pressure. As the pressure is taken directly from both ends of the orifice plate, the measurement accuracy is improved and the minimum length of the straight pipe section required for installation is shortened. It can be used universally.
Flange pressure standard orifice plate: belongs to the standard orifice plate. No matter the diameter of the pipe, the center of the upper and downstream pressure extraction holes are located 1 inch (25.4mm) away from the end face of the hole plate on both sides. This form is widely used in the oil refining system.
Standard orifice plate: It belongs to standard orifice plate. The pressure taking mode is pipeline pressure taking. The center of the upstream pressure taking hole is located at one times the inner diameter of the pipeline in front of the orifice plate, and the center of the downstream pressure taking hole is located at a place half of the inner diameter of the pipeline from the rear end face of the orifice plate.
Nozzles: Nozzles are divided into long neck nozzles, ISA-1932B standard nozzles and non-standard nozzles. Its pressure loss is small, mainly used in power industry main steam flow measurement and flow control detection system.
Embedded (integral) orifice plate: a non-standard orifice plate. For measuring fluid in 10 mm to 50 mm diameters.
Double orifice plate: a non - standard orifice plate. It is composed of two standard orifice plates installed in a straight pipe at a certain distance from each other. According to the direction of the flow beam, the front orifice plate is called the auxiliary orifice plate, and the back orifice plate is called the main orifice plate. The section ratio of the auxiliary orifice plate is larger than that of the main orifice plate m. The two orifice plates form a nozzle similar to that with liquid wall, which is used for the flow measurement of low Reynolds number fluid or high viscosity fluid.
Round hole plate: a non-standard hole plate. It is suitable for the measurement of the fluid flow of dry and dirty, or with bubble precipitation, or containing solid particles, and the measurement accuracy is low.
High pressure lens orifice plate: It belongs to standard orifice plate. High mechanical strength, excellent material, good high temperature and high pressure resistance. Suitable for all kinds of high temperature, high pressure liquid, gas or superheated steam flow measurement with pressure greater than 20MPa.
Venturi: double Venturi is used to measure smoke, air, air volume and other media, it has almost no resistance loss, large differential pressure signal, high pressure sensitivity, stable performance, reliable work, simple structure, convenient maintenance and other advantages, suitable for large flow, large pipe diameter especially rectangular pipe flow measurement, is the ideal device for measuring low velocity large flow volume measurement.
Main technical parameters
Accuracy grade :±0.5%, ±1%, ±1.5%
Nominal diameter :10mm~DN1000mm
According to the national standard GB/T2624-93 design and manufacture
Verification according to the national verification regulations JJG 640-94
Pressure method: Angle pressure, flange pressure, D-D/2 pressure
Nominal pressure :0.6~32(MPa)
Medium under test: liquid, gas, steam, other mixed media
Measured medium temperature :-10ºC~+450ºC
Straight pipe length requirements and throttling device installation in accordance with GB/T26224-93 relevant provisions
1. Overview
Electromagnetic flowmeter design and manufacturing in line with the standard JB/T9248-2015 "electromagnetic flowmeter", is a measurement of conductive medium volume flow speed instrument, in the field monitoring display at the same time, can output the standard current signal, for recording, regulation, control use, automatic detection control, and can realize the signal long-distance transmission. Widely used in environmental protection, steel, petroleum, chemical, coal, metallurgy, minerals, paper, water supply and drainage, food, medicine and other industries in the flow measurement of conductive liquid. The structure of the instrument has a body type and a sub-body type.
2. Special points
No moving parts in the measuring tube, easy to maintain and manage; Free flow parts, no pressure loss;
★ The lowest electrical conductivity of the measured liquid is ≥20μS/cm. With various lining materials, it can be used to measure the flow of various acid, alkali, salt solution and mud, pulp, pulp and other media.
★ The measurement accuracy is not affected by the fluid density, viscosity, temperature, pressure and conductivity changes, the sensor induced voltage signal and the average flow rate is linear relationship, high measurement accuracy;
Low frequency rectangular wave excitation, not affected by power frequency and field interference, stable and reliable work;
★ Not affected by the direction of fluid, positive and negative can be accurate measurement;
★ LCD backlight display, online parameter modification, easy to operate;
★ Chinese and English display mode (optional);
★ Can record the forward total, reverse total and difference total;
★ It has the function of air control measurement and alarm, and can adapt to different fluid medium.
3. Measurement principle
Electromagnetic flowmeter is the use of Faraday's law of electromagnetic induction principle, that is, conductive objects in the magnetic field to cut the magnetic line of force motion, induction electromotive force in the conductor. Its induced electromotive force
E is: E=KBdV
Traffic Q: Q=3600 x V x S
Where: K -- instrument coefficient
B -- Magnetic induction intensity (T)
D -- Electrode spacing (m)
V -- Average flow rate of fluid (m/s)
S -- Cross-sectional area of the catheter (m²)
When the flow rate is measured, the conductive liquid flows through a magnetic field perpendicular to the flow direction at the flow rate V. The conductive liquid flow induces a voltage proportional to the average flow rate. The induced voltage signal is detected through the electrode in direct contact with the liquid. For the same flowmeter S, B, d are constant, so the flow rate is proportional to the magnitude of the induced electromotive force E(or flow rate V).
4. Technical indicators
Applicable measuring diameter: DN6mm ~ DN3000mm
Dielectric conductivity: ≥20 μs/cm
Lining material: polyneoprene rubber, polyurethane rubber, silicone fluorine rubber, polytetrafluoroethylene (PTFE), polyperfluorinated ethylene propylene F46, PFA
Electrode material: SUS316, Hasloy B (HB), Hasloy C(HC), titanium (Ti), tantalum (Ta), platinum/iridium alloy
Working temperature: -20ºC ~ 60ºC
Ambient humidity of the converter: ≤ 95%
Shell protection class: IP65, IP67, IP68
Measuring range: 0.5 ~ 10 m/s
Matching accuracy level: 0.5, 0.2
Measurement parameters: instantaneous flow, velocity, positive and negative cumulative total
Detection and alarm parameters: fluid air pipe detection and alarm, excitation current detection and alarm, upper and lower limit alarm, system alarm
Network functions: HART, MODBUS, GPRS, PROF
IBUS (Optional)
Power supply
Ac power supply, voltage range: 85VAC to 250VAC 24V DC power supply, voltage range: 20VDC to 36VDC self-powered 3.6V power supply
