Flow Meter

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LCN Flow Sensor

Important Notice

Please read this manual carefully before undertaking the installation!
RC Series ultrasonic flow sensors must be installed by qualified personnel in accordance with the instructions given in this manual.
RC takes no responsibility for difficulties arising from failure to observe these instructions.
These instructions should be handed over to the user upon completion of the installation. They should be kept for future reference.
Seals on the heat-meter must not be damaged. Breaking or damaging meter seals is seen as violation of the equipment.

Applications

Ultrasonic flow sensor for use with energy calculators for heating and cooling applications.

Features

Static sensor based on the ultrasonic transit time Principle.
Ultrasonic flow sensor for use with energy calculators for heating and cooling applications.
Low power consumption, long battery life.
Low start-up value and high measurement dynamics.
Measurement accuracy meets EN1434 and MID class 2 and 3 .
Flow-optimised design.
Approved range of measurement 1:250 (only for DN50~DN100 in horizontal, others 1:100) in class 2.
Pulse value can be set free.

Technical data


Environmental class	EN1434/MID E2+M2 (optional E1+M1)
Ambient operating temperature(℃)	-25～55
Battery supply	3.6V lithium battery up to 12 years lifetime①
External power	(5~24)VDC
Mount position	Any angle
Protection class	IP68
Interface	open collector (pulse output and communication②)
Pulse duration	Defult 25 ms (2.5ms for test mode)
	Can be set by customer requirement by software
Cable length	Default 3m (3m～20m optional)
Operating pressure	16 bar with flanged connection (optional 25 bar)

In normal ambient temperature conditions, also depends on the data transmission frequency and correct flow sensor battery installation (positive electrode on the top).
VMCP interface

Temperature input


Absolute Temperature measuring range Θ ℃	1 ～150

Dimensions

（DN50~DN100）

（DN125~DN300）

Nominal diameter		mm	50	65	80	100	125	150	200	250	300
Reference Threshold flow rate		m³/h	0.01	0.02	0.03	0.05	0.08	0.1	0.2	0.3	0.4
Minimum flow	q_i	m³/h	0.06	0.1	0.16	0.24	0.4	0.6	1	1.6	2.4
Nominal flow rate	q_p	m³/h	15	25	40	60	100	150	250	400	600
Maximum flow	q_s	m³/h	30	50	80	120	200	300	500	800	1200
Default working pulse value①		L/pulse	0.5	1	2	2.5	5	5	10	15	20
Pulse value in test mode		L/pulse	0.05	0.1	0.25	0.25	0.5	0.5	1	2	2.5

① Default working pulse value can be set by customer requirements by software.

Flow sensor installation

Note：

The straight pipe requirements marked in the figure are not mandatory, upstream 3 and downstream 0 is acceptable.