Radiator Heat Meter DN20

Overview Common mechanical heat meter is a kind of instrument used to measure and display the released heat power when the heat-carrying liquid pass through the heat exchange system. RLB heat meter is consisted of flow sensor, microprocessor and matched pair temperature sensor. The microprocessor gets the flow signal through flow sensor and the signal of water temperature at the entrance and exit from the temperature measuring circuit, and then calculates released heat by the heat-carrying liquid according to the standard heat calculation formula. The meter is designed and developed on the reference of the European Standard EN1434 and OIML-R75 International Standard, and with high performance and low energy consumption, and in line with the product standard CJ128-2007 Heat Meter issued by Ministry of Construction of China.   Characteristics 1. Alarms when voltage is low. 2. Automatic data correction technology. 3. Alarms when the temperature sensor is disconnected or has a short cut. 4. High definition and wide temperature LCD display. 5. Flow rate has 8 levels and are separately adjusted, with high precision. 6. Ultra-low energy consumption (static power consumption is less than 7uA ). 7. The tube adopts forging technology. 8. Measuring mechanism has no moving parts (means no impeller), and no wear and tear forever. The measuring accuracy will not be influenced by using period. 9. There is optic electric interface, and the communication distance is more than 2 meters, adopt infrared tool can read meter.   Technical Parameters

Flow sensor	Caliber(mm)	Common flow rate		Mini flow rate	Max flow rate
	DN15	1.5 m3/h		0.03 m3/h	3.0 m3/h
	DN20	2.5 m3/h		0.05 m3/h	5.0 m3/h
	DN25	3.5 m3/h		0.07 m3/h	7.0 m3/h
Minimum display of flow rate:   0.01 m3 (working status)    0.00001 m3 (testing status)
Minimum display of heat power: 1kWh(working status)       0.001kWh(testing status)
Temperature sensor			Min temperature difference		1°C or 3°C
			Max temperature difference		90°C
			Min display temperature		0.1°C
Static working current			< 7μA
Power supply			3.6V, by battery
Battery service life			> 6 years
Digit number of LCD screen			8 number
Max accumulated working time			4.2x109 hours(Only final 8 number can be displayed when accumulated working time is more than 99999999 hours)
Max accumulated flow rate			4.2x109 m3 (Only final 8 number can be displayed when accumulated flow rate is more than 999999.99 m3)
Accuracy			Grade 2 or Grade 3
Pressure resisting			1.6Mpa
Loss of pressure			≤0.025Mpa
Working status indicator			Twinkling of our company’s logo on the top left corner of the LCD

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