USAGE BOOK OF RLB THERMAL METER
1.INTRODUCTION
RLB series thermal 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 thermal 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, then calculates released heat by the heat-carrying liquid according to the standard heat calculation formula. The meter is designed and developed on the basis of the European Standard EN1434 和01ML-R75 International Standard, and has high performance and low energy consumption, and in line with the product standard CJ128-2000 Thermal Meter issued by State Construction Department of China.
2.FUNCTIONS
l The flow measurement adopts the latest patent technology of wireless digital monitoring.
l The flow measurement adopts no mechanic gears, non-magnetic sensor, wear-proof, anti-corrosive and anti-attack.
l Low voltage and alarms when being attacked.
l Alarms when the temperature sensor is disconnected or has a short cut.
l Flow and temperature has 10 levels and are separately adjusted, with high precision.
l Intelligent reduction of consumption according to the rate of flow.
l The program can be upgraded online.
l Multi data backup and automatic-correction technology.
l Ultra-low energy consumption.
3.DISPLAY
The thermal meter will display four kinds of data by LED as follow in turn(when thermal power flow through the thermal meter):
Accumulated flow rate: xxxxxx.xxm3
Accumulated working hour:xxxxxxxxh
Temperature of entrance:xx.x℃
Temperature of exit:xx.x℃
When the thermal meter on idle state, the LED will display accumulated thermal power: xxxxxxxxkWh
4.TWO KINDS OF WORKING CONDITIONS OF THERMAL METER
Our thermal meter has two kinds of working states, which are testing state and normal working state. The measure accuracy of testing state is higher than normal working state. For example, the minimum measure parameter of testing state is 0.001 kWh, but under normal working state, the parameter will be 1kWh.
5.TECHINIQUE PARAMETERS
Item / Normal working state / Testing stateState change / By insert the short circuiter on the edge of thermal meter
Minimum display of thermal power / 1kWh / 0.001kWh
Minimum display of accumulated flow rate / 0.01M3 / 0.00001M3
Display N1,N2,N3,N4 / No / Yes
Indication of dynamic water flow / No / Yes
Flow sensor / Caliber(mm) / Common flow(L/h) / Min flow rate / Max flow rate
15 / 1500L/h / 30L/h / 3000L/h
20 / 2500L/h / 50L/h / 5000L/h
25 / 3500L/h / 70L/h / 7000L/h
Minimum display flow rate: 0.01M3(working state) 0.00001M3(testing state)
Minimum display thermal power: 1kWh(working state) 0.001kWh(testing state)
Best working condition of flow sensor / Min temperature difference / 3℃
Max temperature difference / 90℃
Max water temperature of entrance / 95℃
Min water temperature of entrance / 50℃
Min water temperature of exit / 5℃
Max water temperature of exit / 94℃
Min display temperature / 0.1℃
Static working current / < 9μA
Battery service life / > 5 years
Digit number of display 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 99999999 m3)
Accuracy / Grade Ⅱ or Grade Ⅲ
Pressure resisting / 1Mpa
6.INSTALLATION
a. Thermal meter should be at best installed at the water exit of the pipe, to avoid pollution, and make it easy for dismantling and card inserting.
b. Before installation, the pipes shall be cleaned up firstly in case of pipes block which will influence normal working of thermal meter.
c. Thermal meter should be installed horizontally (with the side of display upward), the direction of arrow should be the same with that of the water flow in the pipe.
d. The inlet temperature sensor (line with red label) should be installed on the joint of the water entrance, and the outlet temperature sensor (line with blue label) should be installed on the joint of the water exit.
e. Connecting meter and pipe with right outside force in case of crushing sealed washer and cause water leaking.
f. Handle with care when delivery and avoid strong magnetic field.
7. APPEARANCE AND DIMENSION
Model / HighthA / LengthB / WidthC / LengthD / WeightkgRLB-15 / 91mm / 110mm / 84mm / 88mm / 1.4kg
RLB-20 / 93mm / 130mm / 84mm / 88mm / 1.8kg
RLB-25 / 114mm / 158mm / 84mm / 88mm / 2.5kg
8. TOTAL ARTICALS
a. Thermal meter(1 piece),with two pieces of temperature sensor
b. Joints of temperature(2 pieces)
c. Joints of thermal meter(2 pieces)
d. sealed washers(2 pieces)
e. Nuts(2 piece), can be fixed on the joint of meter
f. Usage book
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