PRODUCT DETAILS
Measurement introduction.
Reed tube is a kind of passive electronic part, which is widely used in various communication equipments. It is a kind of circuit switching device controlled by magnetic field signal, also called "magnetron".The tube is fitted with two iron spring plates and is filled with an inert gas called the metal rhodium.Normally, the two reeds are separated. When a magnetic material approaches, under the action of magnetic field lines of force, the two reeds in the tube are magnetized and attracted to each other, connecting the circuit connected by the two pins.
Metrological Characteristics
1. Compact structure and small weight.
2. The switch components of the reed switch are sealed in the inert gas, which will not contact with the external environment, and
the working life is long.
3. No sliding element is used to prevent metal fatigue and ensure unlimited mechanical life.
Product Brief Introduction :
Reed tube water meter: magnetic sensitive switch, used as a sensor, long life, in the traditional mechanical water meter with reed tube and magnet. When the magnet is close to the reed tube, the reed tube is closed, and when the magnet leaves, the reed tube is open. The calculated pulse signal is output from the surface. The accuracy of measurement is related to the accuracy of the pulse quantity.
Product Superiority :
1. The case is lead-free copper, no toxicity, no pollution, anti - aging.
2. Adopt multi - flow beam movement, small initial flow, high measurement accuracy.
3. Integrated module, low power consumption design, metering process is completed in the meter.
4. The valve is maintained regularly to ensure that the valve works normally.
5. Battery power, moisture-proof, anti-static, effectively ensure the service life of the meter.
6. The meter is mainly measured by means of dry spring tube, and the charging method is settled by means of system settlement. If there is no water, it may be overdue.
7. The main function of this watch is valve control: after reaching the operator's platform under the instruction of valve, the meter can only receive the instruction from the platform when it needs to report the data of the meter, and then execute the switch valve.
FEATURES
1. Measurement Function
* Real-time pulse counter accumulates flow
* Strong magnetic detection trigger alarming info.
2. Historical Data Store Locally
* The data during latest 90 days store every one hour
* The data during the latest 180 days stores everyday
* The data during the latest 1 year stores every month
3. Power supply: one main battery for supplying daily , another one for spare battery
4. Main battery capacity level indicator
* In each measurement data consumption on the road up the service reported to the battery capacity level suffixü
* Low battery threshold ：when the battery capacity is less than 20%, it will trigger low battery alarm and the low battery alarming info.will be reported every 24 hours untill spare battery switch threshold
* Battery switch threshold : capacity of 10% will trigger the switch of spare battery
5. Spare battery switch only in the following cases; otherwise, use the main battery.
* Pull out the battery or the battery does not exist
* The main battery theshold is 10%
* The switch of spare battery is automatic so that i will not be outage
6. Spare battery function
* Water flow control partial measurement
* Historical data storage
* Spare battery exceeds 7 days at least
* When spare battery is used , the alarming info. Of spare battery will be reported to server
7. The spare battery protection in transportation
* Prior to on-site activation, the meter is equipped with only spare batteries, and in the warehouse or during transportation, protection will be provided to prevent the consumption of the spare batteries.
8. Battery life: 6
9. Operating temp.：-5~+ 85℃
10. LED indicator: indicates LORA event
11. Manual triggering lorawan uplink for testing
12. Wireless technology: lorawan in EU868
13. LoRaWAN class: class A
14. LoRaWAN reports regularly measured data for a period of 24 hours by default
The message payload includes
* the latest accumulated measured data
* statue of meter: valve,power, strong magnetic detection
* battery capacity
* lorawan downlink signal indicator RSSI/SNR
15. LoRaWAN fixed time metering data report (ON/OFFconfigurable).LoRaWAN metering data report is triggered every day at fixed time (e.g. 23:00, configurable), and the message payload is the same as the periodic report
* The latest accumulated measured data
* Statue of meter: valve,power, strong magnetic detection
* Battery capacity
* Lorawan downlink signal indicator RSSI/SNR
16. LoRaWAN alarming info. Uplink report
* Low battery alarm
* Spare battery switch alarm
* Valve error alarm
* Strong magnetic detection alarm
17. LoRaWAN downlink set/inquire
* Set up/query LoRaWAN periodic metering data report cycle
* Fixed time measurement data report/switch/set up/inquiry/time
* Modify accumulated water flow data for calibration
* Read the data of current accumulated water flow
* Battery capacity reading
* Valve control switch
TECHINICAL PARAMETERS
Technical Standard |
CJ/T224-2012 Electronic remote water meter |
|
GB/T778.1～3-2007 Close the measurement of water flow in a full pipe and use cold and hot water meters for drinking water |
Accuracy Rating |
Level 2 |
Work Pressure |
≤1MPa |
Pressure Loss |
≤0.1MPa |
Leakproofness |
1.6MPa water pressure, no leakage, leakage and damage within 15 minutes |
Nominal Pressure |
≤1MPa |
Nominal Voltage |
3.6V |
Protection grade |
IP68 |
Working Voltage |
2.7V～3.6V |
Lowest Reading |
0.00005M3 |
Full-scale Reading |
99999M3 |
Climate and mechanical environment safety rating |
Class B |
Transmitted Power |
20dBm |
Frequency Error |
+/-10ppm |
Receive Sensitivity |
-140dBm |
Working Frequency Range |
433/470MHz（780/868/915MHz are available） |
Modulation Mode |
LoRa |
Communication Distance |
No sheltered distance indoors: 1.5km |
Storage Temperature |
-40～125°C |
Battery model |
ER18505M |
Outdoor open space |
3.5km |
Operating Temperature |
-40～85°C |
Life Time |
10 years(once/day) |
Medium Temperature |
Hot water meter temperature:1℃～90℃ |
Quiescent Dissipation |
<8uA |
Closing Valve Time |
≤5S |
Cold water meter for 1℃～45℃ |
Receiving power |
INSTALLATION
1. The installation shall be done by the professional person of Company, and shall be installed according to the requirement of code for management of city Water engineering
2. The Water meter shall be installed in the good aeration place, and shall be convenient for reading, observe and overhaul.
3. Power socket and wire can not be installed near
the Water line, and the distance shall not be less than 300mm. No power wire and
electrical equipment is installed within 500mm of the Water meter.
4.Pay attention to the direction of Water meter inlet
and outlet, and choose the right Water meter, because it cannot be installed
reversely.
5. Screw thread is forbidden to be filled with any sealing objects.
6. After finish the installation, should test the leak tightness. And if it is qualified, then it can be used. Before using, should discharge all of the water inside the Water meter and pipeline.
DIMENSION
MAIN TECHNIQUES
Communication Mode :
1. LORAWAN
(1) Component: Lorawan has four parts
Node: gas meter, water meter, position , alertor etc.
Gateway: receiving data
Network platform : Management of equipment in base station, DNSEG control etc.
User's data background : data storage and application processing for user
The main chip of LORAWAN communication module adopts the high-performance embedded ARM cortex-m3 32-bit RISC controller, which ensures the stability of the device with multilevel software detection and multiple hardware protection mechanisms.It is composed of the powerful ARM cortex-m3 32-bit RISC microcontroller and Lorawan wireless spread spectrum chip .
