Nb-iot wireless photoelectric direct reading intelligent remote water meter adopts rotor type metering structure and photoelectric direct reading technology to read the data of wheel, which can reduce the reading error to zero and realize zero error in electromechanical conversion; the built-in nb-iot wireless module group of water meter is combined with photoelectric direct reading collection technology to receive and send data through COAP or UDP, and the nb-iot base station of cellular narrowband is adopted Upload the information to the water management platform to manage and analyze the user's water use information.
Product use
It is mainly used to measure the total amount of hot water and direct drinking water flowing through domestic tap water, and has intelligent charging and management functions; it is suitable for small unit water and domestic water.
Product characteristics
A. zero reading error: adopt the photoelectric direct reading technology to read the data of the word wheel, and read the data at any time in accordance with the value of the water meter mechanical word wheel, 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, and no failure due to external factors.
D. security of use: the data flow directly reaches the platform service terminal through the operator's base station, without any other intermediate network.
E wide network coverage: in the same frequency band, nb-iot has a gain of 20dB and a coverage area of 100 times larger than the existing network.
F strong connection ability: a sector of nb-iot can support 100000 connections, support low delay sensitivity, ultra-low equipment cost, low equipment power consumption and optimized network architecture; the meter has stronger network attachment ability.
G lower power consumption: the standby time of nb-iot terminal module can be up to 10 years; the nb-iot wireless photoelectric direct reading intelligent remote water meter has the same kind of Internet of things water meter with lower power consumption and longer battery life.
H. low battery warning: the battery usage information of the independent package of the power supply battery is displayed on the service platform.
I. the transmitter module and the base table are installed separately.
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
C / 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
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: 2.4v-4.2v (tye: 3.6V)
Working frequency: B1, B3, B5, B8, B20, B28
Band description
|
Frequency band |
Upstream Frequency band |
Down Frequency band |
Grid mode |
|
B1 |
1920MHz-1980MHz |
2100MHz-2170MHz |
H-FDD |
|
B3 |
1710MHz-1785MHz |
1805MHz-1880MHz |
H-FDD |
|
B5 |
824MHz-849MHz |
869MHz-894MHz |
H-FDD |
|
B8 |
880MHz-915MHz |
925MHz-960MHz |
H-FDD |
|
B20 |
832MHz-862MHz |
791MHz-821MHz |
H-FDD |
|
B28 |
703MHz-748MHz |
758MHz-830MHz |
H-FDD |
Product technical parameters
|
Nominal diameter（mm） |
15 |
20 |
25 |
32 |
40 |
50 |
|
Overload dischargeQ3（m3/h） |
3.1 |
5.0 |
7.8 |
12.5 |
20 |
31.25 |
|
Common dischargeQ3（m3/h） |
2.5 |
4.0 |
6.3 |
10 |
16 |
25 |
|
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 |
MAP10 |
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|
temperature grade |
T30/T90 |
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|
Flow-rate characteristics |
Accord with GB/T 778.1~3-2007 Standard，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 cooling water meter with electronic device |
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|
Design standard |
CJT224-2012Electronic remote water meter |
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|
communication interface |
NB-I0P |
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|
communication mode |
UDP/CoAP way |
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|
Network coverage |
NB lot has a gain of 20dB and a coverage area of 100 times larger than the existing network |
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|
Operating Frequency |
B1,B3,B5,B8,B20,B28（See Appendix table I for detailed description of band） |
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|
Quiescent current |
＜30uA |
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|
Emission current |
230mA |
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|
Receiving current |
60mA |
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|
operating ambient |
5℃~45℃（cold water）、0~95%RH |
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|
Working water temperature |
0.1℃~40℃（cold water）、0.1~90℃（hot water） |
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|
Operating voltage |
2.4V~4.2V(Tye:3.6V) |
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Flow parameters
|
Model |
caliber（mm） |
Range ratio R |
Overload discharge |
Common discharge |
Boundary flow |
Minimum flow rate |
|
M3/h |
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|
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 |
|
|
LXSNB-32E |
DN32 |
12.500 |
10.000 |
0.200 |
0.1250 |
|
|
LXSNB-40E |
DN40 |
20.000 |
16.000 |
0.320 |
0.200 |
|
|
LXSNB-50E |
DN50 |
31.250 |
25.000 |
0.500 |
0.3125 |
|
note：Range ratioR=80/100/125/160，For detailed technical parameters, please call。
A.The maximum allowable error is ± 5% in the low zone from including the minimum flow (Q1) to excluding the boundary flow
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（mm） |
L(mm) |
B(mm) |
H(mm) |
connection thread |
weight Kg |
|
LXSNB-15E |
15 |
165 |
96 |
120 |
G3/4B |
1.5 |
|
LXSNB-20E |
20 |
195 |
96 |
120 |
G1B |
1.8 |
|
LXSNB-25E |
25 |
225 |
104 |
130 |
G11/4B |
2.4 |
|
LXSNB-32E |
32 |
230 |
104 |
130 |
G11/28 |
3.0 |
|
LXSNB-40E |
40 |
245 |
124 |
165 |
G28 |
5.0 |
|
LXSNB-50E |
50 |
280 |
165 |
190 |
法兰连接D=ф165 D1=ф125 4xM19 |
9.5 |
Flow error and loss curve
