LUXB Spiral vortex flowmeterDetailed product description：

One characteristic:

The LUXB vortex flowmeter is a velocity based flow measurement instrument. It has the characteristics of simple structure, high accuracy, large range, no mechanical movable parts, easy installation and use, and is not affected by the density and viscosity of the medium. The casing, vortex generator, piezoelectric sensor, and rectifier of this instrument are all made of stainless steel structure, which is characterized by high corrosion resistance and reliability. The display instrument adopts a high-performance MCU as the central processor, which completes data acquisition, processing, display output, and convenient human-machine interface for cumulative flow and instantaneous flow display on the same screen. It also has password management, instrument coefficient setting, and lower limit flow cutoff. The instrument has both local display of instantaneous and cumulative values and remote transmission function. The remote transmission output is a pulse signal, which is convenient for signal processing and digital display.

Function and purpose:

The LUXB spiral vortex flowmeter can be used to measure the volume flow rate and total amount of gas in closed pipelines, and has explosion-proof function, which can be used in environments with explosive hazards.

Scope of application:

This product is suitable for the flow rate and total amount of single-phase gas. Widely used in industrial and mining enterprises, oil fields, gas fields, metallurgy, electricity, gas and other departments.

Four environmental conditions for use:
a) Specification and Measurement Range of Environmental Table 1 Temperature: -30 to+55 ℃;
b) Relative humidity: 5% to 95%;
c) Atmospheric pressure: 86-106Kpa;

Five working conditions:
a) Temperature of the tested medium: -30 to+80 ℃
b) Power supply method:+3V DC lithium battery (internal power supply) or external power supply+5V -+24V.
c) Output signal: Within the specified range of the flowmeter, the waveform of the output signal is a square wave with an amplitude close to the supply voltage. When remote signal transmission output is required, an external power supply of+5V~+24VDC (three wire system) should be connected.
2、 Working principle
The fluid entering the flowmeter generates a vortex flow through a vortex generator, which spirals in the Venturi tube and reaches the contraction section where it suddenly throttles, accelerating the vortex flow. Place piezoelectric sensors in the area where the vortex flow precesses to detect the precession frequency of the vortex flow. The frequency signal is amplified and shaped by a preamplifier, converted into a pulse signal proportional to the flow rate, and finally processed by the CPU in the intelligent flow integrator to convert it into the cumulative and instantaneous values of the flow rate for display. The secondary pulse signal can also be remotely used for calculation and display by users' computers and other secondary instruments.
The gas equation is as follows:
Qn=Zn/Zg·(Pg+Pa)/Pn·Tn/Tg·Qg
Where:
Qn: Volume flow rate under standard conditions (m3/h) Tg: Absolute temperature of the medium (273.15+t) K
Qg: uncorrected volumetric flow rate (m3/h) t: measured medium temperature in Celsius ℃
Pg: Gauge pressure at the pressure detection point of the flowmeter (KPa) Zn: Compression coefficient under standard conditions
Pa: local atmospheric pressure (Kpa) Zg: compression coefficient under working conditions
Pn: Standard atmospheric pressure (101.325 Kpa) Tn: Absolute temperature under standard conditions 293.15K (20 ℃)
Note: When calibrating the bell jar or negative pressure, Zn=Zg is taken. For natural gas, Zn/Zg=(Fz) 2, where Fz is called the over compression factor, it is calculated according to the formula in the standard SY/T6143-1996 of China National Petroleum Corporation.
3、 Technical indicators:
a) The internal power supply consists of two+3V lithium batteries connected in parallel; （CR123A）
b) The maximum working current is less than 200uA; when connected to an external power source, the working current is less than 100mA;
c) Input signal frequency: 0-3KHZ;
d) Signal transmission distance: 100m;
4、 Specifications and measurement range (see Table 1)
model
Nominal Diameter
DN
(mm) uncorrected flow range
(m? 3/h) Work pressure
(Mpa) Accuracy
(Level)
LUXB-25 25 2-25 1.6； 2.5； 4 1.5
LUXB-32 32 3.5-45 1.6； 2.5； 4 1.5
LUXB-50 50 8-100 1.6； 2.5； 4 1.5
LUXB-80 80 22-350 1.6； 2.5； 4 1.5
LUXB-100 100 50-750 1.6； 2.5； 4 1.5
LUXB-150 150 150-2250 1.6； 2.5； 4 1.5
LUXB-200 200 240-3600 1.6； 2.5； 4 1.5
5、 On site display type (with built-in lithium battery) operating instructions
This intelligent flowmeter is a new type of flowmeter display instrument designed using advanced single-chip microcomputer technology, which is matched with flow sensors that output pulse signals (such as turbines, vortices, etc.). It can display the instantaneous flow rate and cumulative total amount measured by the sensor.
8.1 Characteristics:
a、 Extremely convenient to use, the instrument coefficient K can be placed through the four buttons on the front panel, which can display six instantaneous flow rates and ten cumulative total amounts. The first row displays instantaneous flow, and the second row displays cumulative flow.
b、 EEPROM technology can be used to store the cumulative total amount and instrument system.
8.2 Technical performance indicators:
a、 Cumulative flow rate: Ten digits, with 4 significant digits after the decimal point, accurate to the cumulative number per milliliter.
b、 Instantaneous flow rate: a six digit number that can display changes per liter.
c、 Display accuracy: ± 1 display unit.
d、 Signal output: Pulse output: 0-5000HZ external supply+24V power supply DC.
8.3 Operating Instructions
Definition of key: SET setting key; → Right shift key; Add one click; ESC exit key