Coriolis mass flow meter for lpg/lng/cng

Description

1.1 Introduction The meter is designed and produced according to worlds latest Coriolis technology, with better appearance, stability and accuracy to measure mass flow rate of a fluid traveling through a tube, widely applied to alternative energy, oil & gas, chemical, food & beverage, industrial energy, marine, metals and mining, power, pulp & paper, water & wastewater industries, etc.
  1.2 Operating principle Mass flow meter measures the mass based on Coriolis effort. The operating principle involves inducing a vibration of the tube through which the fluid passes. The vibration, though not completely circular, provides the rotating reference frame that gives rise to the Coriolis effect. While specific methods vary according to the design of the flow meter, sensors monitor and analyze changes in frequency, phase shift, and amplitude of the vibrating flow tubes. The changes observed represent the mass flow rate and density of the fluid.
  1.3 Features ● Measurement is not influenced by flow density, viscosity, temperature & pressure;
● Low requirement of straight pipe, because nothing inside holds back the flow;
● Internal nominal diameter varies from DN*6 to DN**0;
● Low power dissipation; stable zero point; better accuracy;
● Meter is ARM system, with 3 calculators to count density, temperature & mass flow rate;
● Transmitter is assembled by surface mounting technology, with self-inspection function;
● Ex-mark is Ex ib II B/II CT1~T6 Gb.
  1.4 Operating conditions ● Ambient temperature:        Sensor         **0°C~***0°C
Transmitter       **0°C~**0°C
● Relative humidity :           5%~*5%, non condensed
● Fluid :                      Liquid/Gas/Slurry
● Fluid temperature:           ***0°C~***0°C
● Nominal pressure:           4MPa(general model)
*5MPa(high pressure model)
● Voltage:                    AC/*5~**5V; DC/*0V~*6V
  Chapter 2 Composition  
The meter is composed of mass flow sensor and transmitter, with executive standard GB/T *********4.
  2.1 Mass flow sensor Mass flow sensor is a phase-sensitive resonant sensor based on Coriolis effect,composed of vibration tube, signal detector, concussion driver, structural support, shell, etc. 2.1.1 Main parameters

Item	Parameters
Accuracy grade	0.2, 0.3, 0.5
Wetted tubes	Stainless steel **6L
Pressure loss	≤0.2MPa
Housing protection	IP*5
Ex-mark	Ex ibIIB/IIC T1~T6 Gb

2.2 Mass flow transmitter
Mass flow transmitter is a micro-programming-centered electronic system, which supplies thrust to sensor, transforms sensor signal into mass flow signal and others, and improves accuracy in accordance with temperature parameter.
It is composed of switching power supplier, guard grating, core processor board, display module, etc, installed in a ex-proof junction box. Switching power supply offers power for the transmitter; safe grating isolates flow sensor and transmitter intrinsically; core processor detects & processes sensor phase signal, sends mass flow signal and process communication.
  2.2.1 Main features ● Power≤*5W;
● 3 calculators, to count flow rate, density & temperature respectively;
● 2 ways for parameter setting, infrared sensor s and software on computer connected through RS**2;
● RS**5 port, Modbus protocol(please contact our sales team for detail protocol);
● Pulse signal output is OC door output, which can be connected with electronic totalizer;
● Factory set: 1 pulse signal equals 0.1g, customizable before production.