detailed description
DYDS2000 Ultrasonic Flow Meter, Ultrasonic Heat Meter
1、 Overview
The DYDS2000 series ultrasonic flowmeter is a newly designed universal time difference ultrasonic flow measuring instrument based on similar foreign products. This product is widely used for uninterrupted measurement of the flow and heat of clean and uniform liquids in industrial environments. The DYCS2000 series ultrasonic flowmeter has strong adaptability, low power consumption, high reliability, anti-interference, and optimized intelligent signal adaptive processing capabilities. It does not require circuit adjustment and is easy to operate. The CS2000 series ultrasonic flowmeter, with its excellent circuit design concept and selection of high-quality components, has gradually replaced early similar products and become the most widely used flow measurement instrument in China.

2、 Working principle
Ultrasonic flowmeter consists of three parts: ultrasonic transducer, electronic circuit, and flow display and accumulation system. The ultrasonic transducer converts electrical energy into ultrasonic energy and emits it into the measured fluid. The ultrasonic signal received by the receiver is amplified by electronic circuits and converted into an electrical signal representing the flow rate, which is supplied to the display and integration instrument for display and integration.
When an ultrasonic beam propagates in a liquid, the flow of the liquid will cause a slight change in propagation time, and the change in propagation time is proportional to the flow velocity of the liquid, which follows the following expression:

of which
θ is the angle between the sound beam and the direction of liquid flow
M is the number of straight line propagation times of the sound beam in the 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 Down
1、 Host performance parameters
Accuracy: ≤ 1.0 %
Repeatability: 0.2%
Flow rate range: 0 ～±64 m/s
Measurement principle: Ultrasonic propagation time difference principle, dual CPU parallel operation, 4-byte floating-point operation
Display: 2x10 backlit LCD display
Operation: Fixed: 4 × 4 touch keyboard; Portable: 4x4+2 touch keyboard
Input: 5 channels of 4-20mA input, with an accuracy of 0.1%, can input signals such as pressure, liquid level, temperature, etc
Output: Current signal: 4~20mA or 0~20mA, impedance 0~1K floating
Accuracy: 0.1%
Frequency signal: Choose between 1~9999Hz (OCT output)
Pulse signal: positive, negative, net flow and heat accumulation pulses, relay and OCT output
Alarm signal: Relay and OCT output, with nearly 20 signal sources to choose from. Data interface: RS232 serial interface, optional RS485
Other functions: Memory of daily, monthly, and annual accumulated traffic, optional automatic or manual replenishment of traffic and traffic management functions for power on and off time, and memory of daily working status; Programmable batch (quantitative) controller, fault self diagnosis function, network working mode, etc.
Sensor external attachment type: standard S-type, suitable for pipe diameters of DN15-DN100mm;
Standard M-type, suitable for pipe diameters of DN50-DN700mm;
Standard L-type, suitable for pipe diameters of DN300-DN6000mm;
Insertion type: Measurement of pipeline material is not limited (welded or unwelded), suitable for pipe diameters above DN80
Standard pipe section type: suitable for pipe diameters of DN10-DN400, with a measurement accuracy of ± 0.2% for the entire machine
Cable length: Single cable can be extended up to 500 meters (please specify when ordering)
The Conduit
Lining materials: carbon steel, stainless steel, cast iron PVC、 Cement pipes and all other materials are tightly packed into the pipeline
Inner diameter: 20mm-6000mm
Straight pipe length: upstream ≥ 10D, downstream ≥ 5D, distance from pump outlet ≥ 30D
Fluid
Types: Uniform liquids that can transmit ultrasonic waves, such as water, acidic and alkaline liquids, food oil, gasoline, kerosene, diesel, crude oil, alcohol, beer, etc.
Turbidity: ≤ 10000 ppm with low bubble content
Temperature:- 10~110℃
Flow direction: It can measure both forward and reverse flow separately, and can also measure net flow
Ambient Temperature
Host:- 10-70℃
Probe:- 30 ~ +110℃
Humidity
Host: 85% RH
Probe: capable of immersion operation, water depth ≤ 3 meters
2、 Product advantages
The circuit design selects high-quality power modules from the power supply section, and the components are imported with high stability and reliability, which can be compared with similar instruments in the world.
The patented sound wave intelligent technology software can perform intelligent echo analysis without any debugging or other special steps. This technology has the functions of dynamic thinking and dynamic analysis.
The patented technology of sound wave intelligence has greatly improved the accuracy of the instrument, with a liquid level accuracy of 0.3% and the ability to resist various interference waves.
This instrument is a non-contact instrument that does not come into direct contact with liquids, resulting in a low failure rate. The instrument provides multiple installation methods, and users can calibrate the instrument completely through this manual.
All input and output lines of the instrument have lightning protection and short-circuit protection functions.
3、 Application scope
Applied to liquid level detection, gas flow detection, height detection, deviation sensors, ultrasonic distance sensors, etc. The clients currently in use include: Wuhu Huayan Water, Daqing Oilfield, Chongqing Xingbo Chemical, Shengli Oilfield, Hubei Dongfang Chemical, Nantong Economic Development Zone Sewage Treatment Plant, etc.