Product content:

Description: display type (battery-powered)
Medium temperature: ( -20~80), and ( -20~120) c; Ambient temperature: ( -20~55) c;
Accuracy: class 0.2 (ad hoc), 0.5, 1; Repeatability: ± 0.2% indicates that the value of;
Power supply: battery 3V lithium battery, can be used continuously for more than 3 years;
Display mode: single row or double row LCD display instantaneous flow and accumulated flow;
Body material: steel 304, 316 steel, 316L steel;
The material of the impeller: 2Cr13 (NI, TI), PVC;
Bearing material: tungsten carbide, ceramics (need customized);
Connections: screw thread, flange, flange clamping, sanitary clamp interface;
Flange standard: GB/T9112911391159117-2000 national standard;
Working pressure: 1.6~2.5MPa (25~42MPa high voltage custom processing requirements);
Protection class: IP65; Explosion-proof grade: ExdIICT5;
Product details:
One, overview
ZRN-LW turbine flowmeter is made up of turbine flow sensor and display devices are our factory adopts the foreign advanced technology in manufacturing, are the most ideal liquid measuring one of the flowmeter. Flow meter has a simple structure, high accuracy, easy to use installation and maintenance and so on. The products are widely used in petroleum, chemical, metallurgy, water, paper, environmental protection, food and other areas, suitable for measurement in closed conduits with stainless steel 1Cr18Ni9Ti, 2Cr13 and corundum Al2O3, carbide does not corrode, and no fiber, particles and other impurities in the liquid. If used with the display instruments with special function, allowing for automated quantitative control, overload alarm and other purposes.
Second, the product features:
1. sensors for cemented carbide bearings-thrust, not only to ensure accuracy and increases wear resistance.
2. simple structure, firm and easy disassembly.
3. wide measurement range, minimum flow rate is low.
4. pressure loss, reproducible and accurate.
5. has a high resistance to electromagnetic interference and vibration capability.

	ZRN-LW•	• ••	•	•	•	Introductions
Class Type	ZRN-LW-A					Pulse output flow sensor wire, +12V power supply;
	ZRN-LW-B					Field display type 3V battery-powered;
	ZRN-LW-C					Field displays 4~20mA or pulse output, +24V power supply;
	ZRN-LW-D					Flow transmitter 4~20mA output +24V power supply;
Public Weigh Tong Diameter		4				Normal flow range m3/h	0.04~0.25	Extended flow range m3/h	0.04~0.4
		6					0.1~0.6		0.06~0.6
		10					0.2~1.2		0.15~1.5
		15					0.6~6		0.4~8
		20					0.8~8		0.45~9
		25					1~10		0.5~10
		32					1.5~15		0.75~15
		40					2~20		1~20
		50					4~40		2~40
		65					7~70		3.5~70
		80					10~100		5~100
		100					20~200		10~200
		125					25~250		12.5~250
		150					30~300		15~300
		200					80~800		40~800
Anti- Explosion						No tags for non-explosion-proof type
			B			Explosion-proof type
Precision Class				A		Accuracy class 0.2
				B		Accuracy class 0.5
				C		Accuracy class 1
Turbo Type					A	Normal flow range
					B	Extended flow range
Introductions: DN4~DN10 diameter threaded or welding, with a straight pipe and filter before and after, the maximum pressure is 6.3MPa. DN15~DN40 pipe diameters for threaded connection of sensors, pressure 2.5MPa. DN50~DN200 sensors for diameter flange connection, pressure is 1.6Mpa. DN15~DN40 diameter Optional Fitted with straight pipe or joint, material carbon steel and stainless steel. DN15~DN40 diameter as a required flange connection, when ordering. • Type and special request when ordering.

Third, the principle of work:
Fluid flows through sensor shell body, due to impeller of leaves and flows has must of angle, fluid of momentum makes leaves has turned power moment, overcome friction moment and fluid resistance zhihou leaves rotating, in torque balance Hou speed stable, in must of conditions Xia, speed and velocity into is proportional to the, due to leaves has guide magnetic, it in signal detection device (by permanent magnet and coil composition) of magnetic field in the, rotating of leaves cutting lines, periodic of change with coil of flux, to makes coil ends induction out electric
Pulse signal, this signal amplifiers of plastic, form there is a certain level of continuous rectangular pulse, far Eastone to display, show the instantaneous flow rate and the cumulative amount of fluid. In the context of a certain flow, pulse frequency f is proportional to the instantaneous flow rate of the fluid flowing through the sensor Q, flow equations are: Q=3600*f/k;
In the formula:
F – frequency [Hz];
K-the sensor instrument coefficient [1/m3], given by a check list. If [1/L]
Q-the instantaneous flow rate of the fluid (working condition) [m3/h];
3600 – the conversion factor.
Instrument coefficient of each sensor by the manufacturer fill in the verification certificate, k-value into the matching indicator will show the instantaneous flow rate and the cumulative total.
IV. main technical performance of turbine flowmeter:
1. the nominal passes the diameter: (4~200) mm basic parameters are shown in table one;
2. temperature: ( -20~80), and ( -20~120) c;
3. ambient temperature: ( -20~55) c;
4. accuracy: ± 0.2% ± 0.5% ± 1%;
5. detection signal transmission line system: three-wire voltage pulse (c-core shielded cable);
6. power supply: voltage: 12V 0.144V, current: 10mA;
7. output voltage: ≥ 8V high level, low level ≤ 0.8V;
8. transmission distance: sensor to display the distance up to 250 m;
9. display power supply: 3V (lithium-ion battery, can be used continuously for 3 years);
10. display mode: LCD display instantaneous flow rate and cumulative flow;
11. display with signal output power supply: 24V; 4~20mA two-wire current output, remote transmission distance 500 meters. Five, use
• When using liquid to be measured should be maintained clean and free of fibres and particles and other impurities.
• The sensor when used at the beginning, it should first be slowly filled with fluid within the sensor, then open the outlet valve (valve should be installed in the flowmeter in rear), is strictly prohibited when the sensor is no fluid under the influence of high velocity.
• Sensor maintenance cycle is generally six months. Maintenance when cleaning, please pay attention not to damage parts of the measurement cavity, especially impellers. Please guide and position of the impeller when it is assembled.
• Sensor when not in use, washing liquid, dried up and the two ends of the sensor with protective cover, preventing dust from entering, and store in a dry place. (This is important)
• Use of filters should be cleaned on a regular basis, when not in use should be cleaned within the liquid, as well as sensors, plus boot, placed in dry place.
• Transmission of the sensor cable to the aerial or buried (buried should be put on metal pipes.)
• Before installing the sensor, and display meter or oscilloscope connected lines, power source, blows or hand impeller, making it rotate fast there is no display, sensors should be installed when there is a show. If there is no display, you should review the relevant parts, troubleshooting.