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Location > Ultrasonic Flow Meter > Ultrasonic Flow Module

Ultrasonic Flow Module / LRF-2000M

LRF-2000M User Manual
LRF-2000M, the ultrasonic flow module, is best choice for system integration or network measurement because of its small volume, light weight, easy operation, power function and lowest cost.

Features

Powerful Functions
Current output: 4-20mA, one channel, can be used for flow/heat transmitter;
OCT output: two channel, can be used for flow / heat switch;
Current input: 4-20mA, three channel, can be used for data collector;
Tri-wire resistance signal input (PT100): two channel, can be used for calorimeter.

Far transmission distance
Connect flow/heat module and secondary meter through RS-485 interface, transmission distance up to 1000m .
Solve the problems of high cost of special cable, poor anti-interference, short transmission distance etc.

Wide measuring range
Several types transducer for selection, pipe size from DN 15mm to DN 6000mm

High Accuracy measuring
Accuracy: ±1%, linearity: 0.5%, repeatability: 0.2%

General Specification

Optional Transduers		Model	Measuring Range	Liquid Temperature	Accuracy
Clamp-on	TS-2(small size)	LRF-2000MNB1	DN15 -100mm	0C ° ∼ 90C °	Flow±1% Heat±2%
	TM-1(medium size)	LRF-2000MNB2	DN50 -1000mm
	TL-1(large size)	LRF-2000MNB3	DN300 -6000mm
High-tem clamp-on	THS-1(small size)	LRF-2000MNB4	DN15 -100mm	0C ° ∼ 160C °
	THM-1(medium size)	LRF-2000MNB5	DN300 -1000mm
Insertion	TC-1(standard)	LRF-2000MNC1	DN80 -6000mm	0C ° ∼ 160C °
	TLC-2(lengthen)	LRF-2000MNC2
Prover Section	Prover Section	LRF-2000MNG	DN15 -1000mm (see appendix 2)	0C ° ∼ 160C °	Flow±0.5%

Power Supply	Primary meter: 8-36VDC , Secondary meter: AC220V or DC24V
Input	3 channel 4-20mA analog input, 2 channel Tri-wire resistance signal input (PT100)
Output	Isolation RS-232/RS-485 output, 2 channel isolation OCT output 1 channel isolation 4-20mA output (two-wire system)
Communication Protocols	Compatible with MODBUS, METER-BUS protocol, Fuji extended protocol and general water meter protocol.

Main features

Item Performance and Parameter
Convertor	Principle	transit-time ultrasonic flowmeter
	Accuracy	Flow: over 1%-2%(battery-powered supply over ±2% )，Heat: over ±2%，Repeatability: over 0.2%
	Operation	4 keyboards operation
	Signal Output	1 way 4~ 20mA output, electric resistance 0~ 1K，accuracy0. 1%
		1 way OCT pulse output( Pulse width 6 ~ 1 0 0 0 ms，default is 2 0 0 ms)
		1 way Relay output
	Signal Input	3 way 4~ 20mA input, accuracy 0. 1%，acquisition signal such as temperature, press and liquid level
	Signal Input	Connect the temperature transducer Pt100, can finish the heat/energy measurement
	Data interface	Insulate RS485 serial interface, upgrade the flew meter software by computer, support the MODBUS, METER-BUS etc.
Special Cable	Twisted-pair cable, generally, the length under 50 meters;Select the RS485 communication. The transmission distance can over 1000m.
Pipe Condition	Pipe Material	Steel, Stainless steel, Cast iron, Copper, Cement pipe, PVC, Aluminum, Glass steel product, liner is allowed.
	Pipe Diameter	15-6000mm
	Straight length pipe	Transducer installation should be satisfied: upstream10D, downstream 5D, 30D from the pump.
Measuring Medium	Type of Liquid	Water (hot water, chilled water, city water, sea water, waste water, etc.); Sewage with small particle content; Oil (crude oil, lubricating oil, diesel oil, fuel oil, etc.); Chemicals (alcohol, acids, etc.); Plant effluent; Beverage, liquid food; Ultra-pure liquids; Solvents and other liquids
	Temperature	Standard Transducer: -30--90℃; High-temperature transducer: -30--140℃
	Turbidity	No more than 10000ppm and less bubble
	Flow rate	0～±10 m/s
Working Environment	Temperature	Main Unit: -20--60℃
Working Environment	Humidity	Main Unit: 85% RH; Flow Transducer: Ip67
Power Supply	DC8~36V or AC10~30V
Consumption	1.5W

Measuring Diagram of flowmeter

Clamp on	Insertion	Pipe

composition diagram of flow network-measuring