The wireless photoelectric direct reading intelligent remote water meter adopts the photoelectric direct reading technology to read the data of the word wheel. Compared with the traditional pulse remote meter and the plug-in pulse meter, it can reduce the reading error to zero. It is an intelligent remote water meter with zero error realized by electromechanical conversion in the automatic meter reading system. The wireless module adopts Lora modulation technology to transmit and receive data through wireless. It has the characteristics of ultra-low power consumption, super performance and ultra long transmission distance. At the same time, it has high anti-interference and high reliability. In terms of stability, anti-interference ability and receiving sensitivity, it greatly surpasses the existing GFSK module. It solves the problem that the traditional design can not consider the long-distance transmission, anti-interference and low power consumption at the same time, and becomes the best choice for long-distance transmission and high reliability wireless applications.
The water meter adopts the rotor type metering structure, which has the characteristics of high metering accuracy, small initiating flow, remote meter reading, exquisite appearance, safety and health, long service life, etc. Wireless connection is adopted between the meter and the collection equipment, remote intelligent reading of monthly, weekly and daily water consumption data of water meter users, network connection and data sharing with the settlement center are realized.
Product use
It is used to measure the total amount of domestic tap water, hot water and direct drinking water, and has the function of intelligent charging and management; the water meter adopts the photoelectric direct reading technology to take the data of the word wheel, which is an intelligent instrument that uses the Lora modulation technology to transmit the data and open and close the valve wirelessly, and is suitable for the measurement of small industrial water and domestic water.
Product characteristics
A zero reading error: photoelectric direct reading technology is used to read the data of the wheel, and the reading data at any time is consistent with the value of the mechanical wheel of the water meter, without accumulated error.
B. strong anti-interference ability: non-magnetic components, non-interference by magnetic substances, anti strong light interference ability of patented technology, self shielding function when encountering strong light interference in reading operation, to ensure accurate reading.
C long service life: adopt photoelectric direct reading technology for sampling, no mechanical contact and mechanical action, no failure due to external factors.
D use security: the data flow directly reaches the platform service terminal through the operator's base station, without any other intermediate network.
E. long transmission distance: the typical transmission distance can reach 2-5km, far exceeding the conventional small wireless transmission distance.
F low power remote wake-up: the module adopts ultra-low power design, which can respond to remote wake-up in real time.
G automatic initialization setting: the system can automatically complete the full-automatic initialization setting of all the information of the equipment in the system, including the full-automatic remote input of all the initialization information of the collector and the meter, reducing the labor intensity of the construction, and avoiding the input error at the same time.
H low power valve closing: when the battery power is lower than the set value, the module sends the valve closing command to close the water valve.
Design standard
GB / t778-2007 measurement of water flow in closed pipeline full pipe drinking cold water meter and hot water meter
CJ / t224-2012 electronic remote water meter
CJ / t383-2011 electronic direct reading water meter
Jjg162-2009 verification regulation of cold water meter
Rated working conditions
Flow range: q1-q3
Ambient temperature: 5 ° c-55 ° C
Ambient humidity: (0 ~ 100)% RH
Water temperature: cold water T30 ° C hot water T90 ° C
Water pressure: ≤ 1.0MPa
Water quality: tap water, direct drinking water, domestic hot water
Working power supply: 2.7v-3.6v
Communication working frequency band: 470-510mhz
Communication distance: 2.5km (different urban environment density, different test distance)
Wireless communication rate: 2000bps
Product technical parameters
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Nominal diameter（mm） |
15 |
20 |
25 |
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Overload dischargeQ4(m3/h) |
3.1 |
5.0 |
7.8 |
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Common dischargeQ3(m3/h) |
2.5 |
4.0 |
6.3 |
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R=Q3/Q1 |
80，100，125，160 |
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Range ratio |
Q2/Q1=1.6 Q4/Q3=1.25 |
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Pressure loss level |
△p≦0.063MPa |
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Pressure grade |
MPA10 |
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Temperature class |
T30/T90 |
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Flow characteristics |
Comply with GB / T 778.1-3-2007, accuracy level: Level 2 |
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Maximum permissible error |
High area（Q2≦Q≦Q4）BY±2%,Low area（Q1≦Q≦Q2）BY±5% |
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Water meter type |
Electronic remote water meter with electronic device |
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Design standard |
CJT224-2012Electronic remote water meter |
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Communication mode |
LoRa modulation technique |
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Communication working frequency band |
470～510MHz |
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Communication sensitivity |
-136±1dBm |
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Communication distance |
Typical distance：2-5Km(Different density of urban environment and different testing distance) |
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Wake-up mode |
It can receive the instruction of collector in real time and wake up remotely |
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Quiescent current |
19uA |
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Emission current |
<110mA |
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Receiving current |
<20mA |
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work environment |
5℃～45℃、0～95%RH |
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Medium temperature |
0.1～30℃(cold water)、0.0～90℃（hot water） |
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working voltage |
2.7～3.6V(When the valve below 2.7V is closed, the normal communication data can still be read) |
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Valve control function |
Open / close valve control management can be carried out for each user's meter through the management platform (only for water meter with valve) |
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Flow parameters
Model caliber（mm） Range ratio R Overload discharge Common discharge Boundary flow Minimum flow rate M3/h LXSNB-15E DN15 80 3.100 2.500 0.050 0.03125 LXSNB-20E DN20 5.000 4.000 0.080 0.0500 LXSNB-25E DN25 7.800 6.300 0.126 0.0787
note：Range ratio R=80/100/125/160，For detailed technical parameters, please call。
Maximum permissible error
B.The maximum allowable difference is ± 2% (when the water temperature is ≤ 30 ° C, ± 2%, when the water temperature is > 30 ° C, ± 3%) in the high zone including the boundary flow (Q2) and the overload flow (Q4)
Appearance and installation dimension
|
Model |
Nominal diameter |
Long |
Board |
Height |
take over |
Nut |
|
LXSYF-15W |
15 |
165 |
90 |
106 |
R1/2 |
G3/4 |
|
LXSYF-20W |
20 |
195 |
90 |
108 |
R3/4 |
G1 |
|
LXSYF-25W |
25 |
225 |
96 |
130 |
R1 |
G11/4 |
Flow error and loss curve
