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Shanghai Ziyu Instrument Co., Ltd
Portable ultrasonic flowmeter
NegotiableUpdate on 05/24
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Overview
The ZY-CSB-300B portable flowmeter is a complete flow measurement instrument based on microprocessor technology. In terms of design, it adopts advanced integrated circuits and microprocessor intelligent control, realizing the unadjusted parameters of components in the production process. The production process is simple and reliable, with good product consistency, ensuring that every machine leaving the factory achieves the best performance and working condition. In addition to its significant features of high reliability, high performance, and low price
Product Details
ZY-CSB-300B portable ultrasonic flowmeterDetailed information:
Welcome to choose the new version of ultrasonic flowmeter with better performance, more powerful functions, and patented technology manufacturing.
The portable ultrasonic flowmeter is a new universal time difference multifunctional ultrasonic flowmeter designed based on the 13th edition ultrasonic flowmeter, using low-voltage multi pulse and balanced transmission and reception patented technology. It is suitable for continuous measurement of the flow rate and heat of most clean and uniform liquids without high concentration suspended particles or gases in industrial environments.
Compared with the previous version of the flowmeter, the new version of the flowmeter has the following advantages:
① The linearity of the measurement is better than 1%, and the repeatability is better than 0.2%
②The use of isolated power supply has improved anti-interference ability;
③Adopting isolated RS-485 interface, MODBUS protocol, M-BUS protocol, FUJI extension protocol and other flow meter protocols.
④It has the function of determining the type of fluid based on the sound velocity of the fluid, and can identify the type of fluid.
The ultrasonic flowmeter uses the latest components produced by internationally renowned semiconductor manufacturers, such as National Semiconductor Corporation, TI, Maxim, Philips, Winbond, Xilinx, etc. It also adopts optimized intelligent signal adaptive processing technology and the latest integrated circuits, which enhances the reliability of the whole machine, with low power consumption, high reliability, strong anti-interference ability, and good applicability.
The advanced hardware circuit design, convenient and flexible software, selection of the latest components, and user-friendly interface design in Chinese have made the new version of HZ-110 series ultrasonic flowmeter the most advanced and truly the first brand in China, and quickly entered the international market and won recognition.
characteristic:
Portable ultrasonic flowmeterIt is a flow measurement instrument based on microprocessor technology, with its own complete system. In terms of design, it adopts advanced integrated circuits and microprocessor intelligent control, realizing the unadjusted parameters of components in the production process. The production process is simple and reliable, with good product consistency, ensuring that every machine leaving the factory achieves the best performance and working conditionState. In addition to its significant features of high reliability, high performance, and low price, portable flow meters also have the following additional advantages:
1. High precision measurement
Linearity better than 0.5%, repeatability accuracy better than 0.2%, measurement accuracy better than ± 1%
2. Non contact measurement
Attach the magnetic ultrasonic flowmeter sensor to the outer wall of the pipeline to complete the flow measurement
3. Large measurement range
By selecting different types of sensors, it is possible to measure the flow rate of pipelines with diameters ranging from DN15 to DN6000mm
4. Support both Chinese and English menus
Different versions of flow meters can support Chinese or English menus, making it convenient and fast
5. Charging power supply
Equipped with a large capacity nickel hydrogen rechargeable battery, it can support continuous operation of the flowmeter for more than 20 hours
6. Built in printer
It can achieve real-time screen printing and also print measurement results of up to 20 pre-set items on a scheduled basis
7. Built in data logger
Up to 20 pre-set measurement results can be uploaded to a computer or networked communication
Portable ultrasonic flowmeterworking principle:
Portable ultrasonic flowmeter is used to measure the flow rate of liquid in closed pipelines. Its sensor is non-contact and attached, making installation simple and easy to operate.
The two sensors of the portable ultrasonic flowmeter have the characteristics of both receiving and transmitting. Users can attach two sensors to the outside of the pipeline at a certain distance, using the V-method with two sound paths and the W-method with four sound paths,Alternatively, the Z-method of relative installation can be used by directly passing sound waves through the tested pipeline.
When an ultrasonic beam propagates in a liquid, the flow of the liquid will cause a slight change in propagation time, which is proportional to the flow velocity of the liquid. When there is zero flow, the time required for two sensors to emit and receive sound waves is exactly the same (the only technology that can actually measure zero flow). When liquid flows, the sound wave transmission time in the upstream direction is greater than that in the downstream direction.
The flow meter controls two sensors to alternately receive and emit ultrasonic waves and measure the propagation time between them. The time difference is calculated, and the obtained time difference is proportional to the flow velocity of the fluid, which follows the following expression:
Among them:
θ is the angle between the sound beam and the direction of liquid flow
M, The number of straight line propagation times of sound beam in liquid
D is the inner diameter of the pipeline
Tup is the propagation time of the sound beam in the positive direction
Tdown is the propagation time of the sound beam in the opposite direction
Δ T=Tup –Tdown
Application areas:
Portable ultrasonic flowmeter is used for measuring and detecting various single and uniform liquids that can conduct ultrasonic wavesThe traffic.Adopting non-contact measurement method, with a large measurement range and no moving mechanical parts, notDue to the pressure of the system and the impact of harsh environments, it has been successfully applied to water, pure water, seawater, sewage, chemical liquids, river waterIn the measurement of fluids such as fuel oil. The upper limit temperature of the standard sensor is 90 º C. If it exceeds this temperature, please contact the manufacturer or supplierBusiness contacts.Widely used in industries such as refrigeration, heating, heat exchangers, freezers, boilers, etcMeasurement of consumption.
Quick input:
The following parameters need to be entered during routine measurements:
1. Outer diameter of pipeline
2. Thickness of pipe wall
3. Pipe materials
4. Lining material parameters (if any, may include lining thickness and lining material sound velocity)
5. Liquid type
6. Sensor type (because the host can support many different sensors)
7. Sensor installation method
The input steps for the above parameter conditions generally follow the following setting steps:
1. Enter MENU 1 to enter window 11. Enter the pipe wall thickness and press the ENT key;
2. Type ▼/- to enter window 12, enter the pipe wall thickness, and then type the ENT key
3. Type ▼/- to enter window 14 ENT, ▲/+or ▼/- select the pipe and type the ENT key;
4. Enter the ENT key in window 16 by typing ▼/-, ▲/+or ▼/- after selecting the lining material;
5. Enter the ENT key in window 20 by typing ▼/-, ▲/+or ▼/- to select the fluid type, and then press the ENT key;
6. Enter the ENT key in window 23 by typing ▼/-, ▲/+or ▼/- to select the sensor type, and then press the ENT key;
7. Type ▼/- to enter window 24 ENT, ▲/+or ▼/- select the installation method and then type the ENT key;
8. Type ▼/- to enter window 25, and install the sensor according to the displayed installation distance and the installation method selected in the previous step (see the sensor installation section in the next section);
9. Enter MENU 0 1 to enter window 01, which displays the measurement results.
Technical parameters:
Note: Equipped with a high-strength protective box, it can be used in harsh environments such as outdoors and underground.
Power on:
pressonPress the key to turn on the power of the flowmeter, then pressoffPress the key to turn off the power of the flowmeter.After the flowmeter is powered on, first run the self diagnostic program to check the software and hardware. If there is a fault, display the corresponding error message.
If there are no error messages displayed, the flowmeter will directly enter the commonly used window 01 (abbreviated as M01), displaying flow rate, instantaneous flow rate, positive cumulative flow value, signal strength, and signal quality. The flowmeter will work based on the pipeline parameters input before the previous power outage or the initial set parameters.
The measurement process of the flowmeter is carried out in the background of the user interface, which means that the flow measurement will not stop because the user needs to browse the window. Only when the user changes the parameters for a new pipeline measurement, the flowmeter will work according to the new parameters.
Selection of sensor installation location:
In order to obtain ideal measurement results, the first step is to select an ideal measurement point. Suggest users to understand some basic knowledge about pipeline and pump systems.The definition of an ideal measurement pipe section is that the liquid in the pipeline must be full and have sufficient straight pipe length. Pipelines can be horizontal or vertical. The following example shows how to correctly locate.
The principle of selecting the correct measurement location:
The pipeline for installing sensors should have a sufficiently long straight section, of course, the longer the better, usually upstream10Double the diameter of the tube,downstream5Double the diameter of the pipe, away from the pump outlet30Double the diameter of the tube; At the same time, ensure that the liquid in this section of the pipeline is always full.The temperature range of the tested pipeline is determined to be within the operating temperature range of the sensor, usually optimal at room temperature.Taking into account the corrosion or scaling of the pipeline, it is best to choose a newer pipeline for measurement. If the conditions are not met, subtract the corrosion from the pipe wall thickness or consider scaling as a lining.
Some pipes have plastic lining, and due to the manufacturing process of the pipes, there may be gaps between the inner wall of the pipe and the lining, which can block the propagation of ultrasonic waves and make measurement very difficult. Therefore, users should try to avoid measuring on such pipes as much as possible; If it cannot be avoided, we must use the wall mounted plug-in ultrasonic flowmeter produced by our company, which can be installed by drilling holes in the pipeline under continuous flow and pressure, solving the problem of not receiving signals.
Installation of sensors：
The sensor of the portable ultrasonic flowmeter uses a pair of dual-purpose piezoelectric ceramic plates, which can transmit and receive ultrasonic signals passing through pipelines and liquid flows. Flow measurement is completed by measuring the difference between the time of transmitting and receiving ultrasonic waves. Due to the very small difference, the distance and parallelism between the sensors will affect the measurement accuracy, and users should install the sensors carefully and attentively.
Steps for installing sensors:
Choose a location with sufficient straight pipe length, preferably a new pipeline, rust free, and easy to operate area.
Remove debris and rust from the pipeline, preferably using a corner grinder to remove the rust.
Apply sufficient amount of coupling agent (such as butter, Vaseline, etc.) on the emission surface of the sensor to eliminate air between the emission surface of the sensor and the outer surface of the pipeline.
Special reminder: Sand and debris should be avoided from entering this area.
There may be some bubbles remaining on the upper part of the inner wall of the horizontal pipeline. When installing on such a pipeline, it should be selected on the surface perpendicular to the side of the pipeline.
steady flow
A stable flowing fluid helps ensure measurement accuracy, while a fluid with chaotic flow conditions can make it difficult to guarantee measurement accuracy. Standard requirements for meeting steady flow conditions:
★ The pipeline is far away from the pump outlet and has a semi open valve, with an upstream diameter of 10D and a downstream diameter of 5D (D is the outer diameter);
★ 30D away from the pump outlet and half open valve.
If the standard requirements for stable current conditions cannot be met, the following situations can also be attempted for measurement:
There are bends or buffering devices between the pump outlet, semi open valve, and installation point;
★ Inlet of the pump and upstream of the valve;
The flow velocity of the fluid is medium to low.
(Low flow velocity: flow velocity<1m/s; Medium flow velocity: flow velocity of 1-2m/s; High flow velocity: flow velocity>2m/s)
It is difficult to ensure stable flow in the following situations, and installation should be done with caution.
★ The distance from the pump outlet and the half open valve straight pipe section cannot guarantee 10D, and there are no buffering devices such as elbows;
★ The distance from the pump outlet and the half open valve straight pipe section cannot guarantee 10D, resulting in high flow rate;
★ Flow vertically downwards and diagonally downwards;
The downstream distance from the open outlet of the pipeline is less than 10D.
Note: If it is difficult to determine steady flow, a portable ultrasonic flowmeter can be used for actual measurement and observation of signal conditions.
Scaling
The scaling on the inner wall of the pipe will attenuate the transmission of ultrasonic signals and reduce the inner diameter of the pipeline. So pipelines with scaling on the inner wall of the pipe will prevent the flow meter from measuring properly or affect the measurement accuracy. Therefore, it is advisable to avoid selecting areas with scaling on the inner wall of the pipeline as installation points as much as possible. If it is impossible to avoid the installation point of scaling, the following measures can be taken to eliminate or reduce the measurement impact of scaling on the inner wall of the pipeline.
Replace the pipeline of a measuring point.
Use a hammer to strike the pipeline at the measuring point with force until the signal at the measuring point increases significantly.
Choose the Z method for measurement and set the scale as the lining to achieve better measurement accuracy.
Exceeding the operating temperature range of the sensor can easily cause damage to the sensor or significantly shorten its lifespan. Therefore, the fluid temperature at the installation point must be within the range of the sensor's installation and use. And try to choose installation points with lower temperatures as much as possible. So, try to avoid the boiler water outlet and heat exchanger outlet in the same pipeline, and install it on the return water pipeline as much as possible (if conditions permit, it is best to use an infrared thermometer to measure the temperature at the installation point).
pressure
The installation of portable ultrasonic flow meters is not affected by pressure.
interfere
Portable ultrasonic flowmeterThe host, sensors, and cables are easily affected by interference sources such as frequency converters, radio stations, television stations, microwave communication stations, mobile phone base stations, and high-voltage lines. So when choosing sensor and host installation points, try to stay away from these interference sources as much as possible; The shielding layer of the host chassis, sensors, and ultrasonic cables must be grounded (the grounding wire of the plug-in sensor has been made into a terminal post); Do not use the same power supply as the frequency converter. Instead, use an isolated power supply to power the host.
Notice for ordering portable ultrasonic flowmeter:
To order a portable ultrasound flowmeter, please provide the following parameters:
Name of the tested medium;Pipe diameter range;Work pressure: maximum stress tolerance;Working temperature: measure the lowest and highest temperature of the liquid;
Material requirements: For liquid handling materials, if you don't know which material to use, you can consult us (usually we can use whatever material is used for liquid filling);
Special requirements: Please specify in detail before placing an order, such as whether remote transmission is required, etc.
