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LZYN Series Mass Flow Meter

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U Series
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U Series

LZYN Series Mass Flowmeter (hereafter we call LZYN) is designed according to the Coriolis Principle. It can be widely used for the process detecting and custody transfer...


Description

  • Introduction
  • Specification
  • Function
  • Outline Dimension
  • Model Selection

1. General
LZYN Series Mass Flowmeter (hereafter we call LZYN) is designed according to the Coriolis Principle. It can be widely used for the process detecting and custody transfer/fiscal unit in many industries such as petroleum, petrochemical industry, pharmacy, paper making, food and energy, and so on. As a fairly advanced kind of flow measurement instrument, it has been paid attention by the circle of measurement and accepted by many customers home and abroad.

2. Principle

LZYN is designed according to the principle of Coriolis force. Under the alternating current effect, the magnet and coil installed on the measuring tube will make two parallel measuring tubes vibrate according to some fixed frequency. Once there is flow passing through the pipes, Coriolis force will give rise to deflection (phase shift) on the vibration of two pipes and the deflection of vibration is directly proportional to the mass flow of fluid. Pick up them and the mass flowrate could be calculated.

The vibration frequency of measuring tube is determined by the total mass of measuring tube and inner fluid. When the fluid density changes, the vibration frequency of measuring tube will be also changing, as a result, the fluid density can be calculated.
The temperature transducer installed in the pipeline can pick up the fluid temperature on time under the coordination of measuring circuit.

3. Feature
3. 1 Digital transmitter Feature
Comparing with traditional analog circuit and analog transmitter, digital circuit and digital transmitter has the following obvious merits:
3.1 Enable to measure directly mass flow rate of fluid in the pipeline without changing any parameters, which avoids the some measurement error of intermediate links. Its mass flowrate can be high accuracy and good repeatability within bigger range of turndown ratio.
3.2 Fluid measured can be more extensive, such as the steady uniform flow of common viscosity fluid, the high viscosity fluid, non-Newtonian fluid, slurry containing some solid components and the liquid containing some trace of gas.
3.3 Due to the small vibration, measuring tube of the LZYN can be regard as non-moving parts, which will reduce the maintenance of flowmeter, enhance the stability and lifetime.
3.4 Besides the mass flow measurement, the density and temperature and even consistency can also be picked up and output.

G Type CoriolisTransmitter & D Type Coriolis Transmitter
G type coriolistransmitter is an analogtransmitter, which adopts traditional method to do the sampling and signal analysing.
D type coriolistransmitterutilizes DSPtechnologywhich greatly improves themethods of sampling, signal filtering, and signal analyzingforbetter performanceon accuracy and turndown.It especially enhances the accluracyunder low flow rate. It can be used for gas medium.
Difference between G TypeAnalog transmitter and D Type DSP transmitter



 


5.3 Low Flow Cutoff
When the flow value measured is lower than the value of Low Flow Cutoff, the LZYN will output zero flow and the totaliser
will stop to accumulate. The value of Low Flow Cutoff is usually sets to be 1% of the maximum flowrate.


 

LSZ -Electronic Meterhead 

LSZ -Stainless steel (-20°C ~ +80°C)  

LSZ -Stainless steel high temp. type (+80°C ~ +150°C)

LSZ -Stainless steel high temp. type (+150°C ~ +250°C)





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