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Jiangsu Leitai Instrument spot ultrasonic flowmeter (fixed external clamp type)
LT-GDUF2000 Ultrasonic Flow Meter I. Overview The LT-GDUF2000 series ultrasonic flow meter is a newly designed universal time difference ultrasonic fl
Product details
LT-GDUF2000ultrasonic flowmeter
1、 Overview
LT-GDUF2000 seriesultrasonic flowmeterIt is a newly designed universal time difference ultrasonic flow measuring instrument based on reference to 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 GDUF2000 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 GDUF2000 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 flowmeterIt 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 – Tdown
3、 Characteristics
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high precision measurement
Linearity better than 0.5%, repeatability accuracy better than 0.2%, measurement accuracy better than ± 1%
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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
- Support Chinese and English menus
Different versions of flow meters can support Chinese or English menus, making it convenient and fast
- reliability
By adopting low-voltage and multi pulse transmission circuits, the measurement accuracy, service life, and reliability are greatly improved
- Strong anti-interference ability
Adopting a dual balanced signal differential transmission and reception circuit, effectively resisting strong interference sources such as frequency converters, TV towers, and high-voltage lines
- Powerful memory function
Automatically remember the cumulative flow of the first 512 days, the first 128 months, and the first 10 years, automatically remember the time and flow of the first 64 incoming and power outages, and automatically remember whether the working status of the flowmeter is normal in the first 32 days. - Support Chinese and English menus
4Host 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
5、 Selection Table
GDUF2000-□□□□
Host style
F1Fixed Chinese
F2Fixed English
P Portable
Sensor style
AExternal binding type
1. Standard S-type applicable pipe diameter range DN15-DN100mm
2 standard M-type applicable pipe diameter range DN50-DN700mm
3 standard L-type applicable pipe diameter range DN300-DN6000mm
Bplug-in
1. Pipeline for direct welding
2. Used for cast iron pipelines
3. Used for cement pipelines
Working power supply
AC power
D direct current
Online inquiry
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