I. Product Overview:
Jing Chuan JC- LWGY type Liquid flow meter dedicated Is spread by direct contact with the medium flow sensor and display instrumentation components, is the company learned flow meter at home and abroad advanced technology and optimized design manufacturing is one of the best flowmeter liquid metering. Has a simple structure, responsive, accuracy, installation and maintenance easy to use features, are widely used in petroleum, chemical, metallurgy, water, paper, environmental protection, food and other fields, for measuring the closed pipe and stainless steel 1Cr18Ni9Ti, 2Cr13 and corundum Al 2O3 Carbide corrode, and no liquid fibers, particles and other impurities. If the display instrument using a special function that can be automated quantitative control, excessive alarm and other purposes, is ideal for flow measurement and energy meter .
Second, the principle:
Fluid flows through the sensor housing;; because the blades and the flow impeller has a certain angle; fluid momentum of the blade has a rotating torque; after blade rotation as shown in Figure overcome friction torque and fluid resistance; in the torque balance speed and stability; in Under certain conditions; speed and velocity is proportional; the leaves have a permeability; it is a signal detector (by the permanent magnet and coil) magnetic field, rotating blades cutting magnetic field lines, periodically changing the coil of the magnetic flux, so that both ends of the coil induces an electrical pulse signal which is amplified shaping amplifier is formed with a certain level of continuous rectangular pulse wave, can be remote to the display instrument, showing the instantaneous flow rate and cumulative amount of fluid. In certain within the flow range, pulse frequency f and instantaneous flow of the fluid flowing through the sensor Q proportional to the flow rate equation is: Q = 3600 * f / k;
Where: f-- pulse frequency [Hz];
k-- sensor meter factor [1 / m (SUP) (FONT size = 2) 3 (/ FONT) (/ SUP)], is given by a single calibration. Often [1 / L] units
Q-- instantaneous flow of fluid (operating condition) [m (SUP) (FONT size = 2) 3 (/ FONT) (/ SUP) / h];
3600-- conversion factor.
Each sensor meter factor from the factory fill in the verification certificate, k value is set into supporting the display instrument, it can display the instantaneous flow rate and cumulative totals.
Third, the product features:
Jing Chuan JC- LWGY type Liquid turbine flowmeter It has the following characteristics:
1, high-precision, generally up to ± 1% R, ± 0.5% R, high-precision up to ± 0.2% R;
2, repeatability, short-term repeatability of up to 0.05% -0.2%, such as frequent calibration or online high accuracy calibration available in the trade settlement may be preferred;
3; an output frequency signal; the resolution is strong; suitable for total metering; no zero drift; anti-jamming;
4; a sensor to push hard alloy bearing only; not only to ensure accuracy; and improve the wear resistance;
5; compact structure; firm; easy installation and maintenance;
6; wide measuring range; the lower limit of the flow rate is low; medium and large caliber up to 1:20, small caliber 1:10;
7, has a high resistance to electromagnetic interference and vibration resistance;
Fourth, the technical parameters:
Jing Chuan JC- LWGY type Liquid turbine flowmeter Some basic parameters are as follows:
Implementation of standards
Turbine flow sensor (JB / T9246-1999)
Meter diameter (mm) and connections
46101520253240 threaded connection;
(1520253240) 506580100125150200 flange connection;
± 1% R, ± 0.5% R, ± 0.2% R (required custom)
1: 10; 1: 15; 1: 20
304 stainless steel; 316 (L) stainless steel
Medium temperature: -20 ℃ ~ + 120 ℃
Ambient temperature: -20 ℃ ~ + 60 ℃
Relative humidity 5% to 90%
Atmospheric pressure 85 ~ 106Kpa
Pulse signal, 4-20mA
Communication output function
RS485, hart communication
A: external power supply; + 24VDC ± 15%; ripple ≤ ± 5%; suitable for 4-20mA output; pulse output; RS485, etc;
B: internal power supply, a group 3.0V10AH lithium battery, the battery voltage can work properly when 2.0-3.0V.
Signal line interface
Basic: Horsman interface or comes three core cables;
Explosion-proof: internal thread M20 * 1.5
ExiaIICT4 or ExdIIBT6
IP65 or higher can be customized
V. Model Description and Selection:
JC- LWGY-• -• -• -• -• -• -•
① ② ③ ④ ⑤ ⑥ ⑦
①: Nominal size (unit mm): DN4-DN200
②: Instrument type:
N-type: + 12V or 24V power supply, three-wire output pulse signal;
Type A: + 24V supply, the output wire 4-20mA
Type B: internal lithium battery-powered; live shows; no signal output;
Type C: + 24V power supply; live shows; output two-wire 4-20mA;
Type D: + 24V power supply; live shows; and with RS485 communication output;
E type: + 24V power supply; live shows; and with HART communication protocol;
③: Accuracy: points 0.5 (05) 1.0 (10) and 0.2 (02) (to be customized) three;
④: Range: sub-standard range (S) and extended range (W);
⑤: Body material: stainless steel 304 points (S) and 316 (L) stainless steel (L) two kinds;
⑥: Explosion levels: no explosion points (N) and flameproof (E);
⑦: Pressure rating: sub-routine (N) and high pressure (H);
• When using, keep the liquid under test clean, free of fibers and particles and other impurities.
• sensor at the beginning of use; the sensor should first slowly filled with fluid; then turn the outlet valve (the valve should be installed in the meter backend), high-speed non-impact sensor in fluid when no liquid state.
• sensor maintenance cycle is generally six months. Overhaul cleaning, take care not to damage the measurement chamber parts, especially the impeller. Please promising positional relationship between the guide and the impeller assembly.
• When the sensor is not in use, clean the inside of the liquid, and after drying at both ends of the sensor plus the protective cover to prevent dust entering, and then placed in dry place. (This is very important)
• Equipped with the filter should be cleaned regularly, do not be cleaning the inside of a liquid, like sensors, plus dust cover in a dry place to save.
• sensor transmission cable can be laid overhead or underground (buried iron pipe should be put on.)
• Before installing the unit, first with the display instrument or oscilloscope connected wires, through power, with mouth-blown or hand dial impeller to rotate quickly to observe whether the display when a display before installing the sensor. If there is no display, you should inspection of the various parts, troubleshooting.