The small caliber nb-iot Internet of things (photoelectric) valve control water meter adopts rotor type metering structure and photoelectric direct reading technology to read the data of the wheel, which can reduce the reading error to zero and realize zero error in the electromechanical conversion; the built-in nb-iot wireless module group of the water meter is combined with photoelectric direct reading collection technology to send and receive data through COAP or UDP, and the narrow-band nb-iot base of the honeycomb The station uploads the data information to the water management platform to manage and analyze the user's water use information.
Product use
Each user table can be opened / closed through the management platform. It is used to measure the total amount of domestic tap water, hot water and direct drinking water, and has intelligent charging and management functions; it is an intelligent instrument with photoelectric direct reading and sensing reading, and can transmit data and switch valves through nb-iot Internet of things, which is suitable for small industrial water and domestic water metering.
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 wide network coverage: in the same frequency band, nb-iot has a gain of 20 dB 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 power supply battery is displayed on the service platform.
I. the transmitter module and the base table are installed separately.
J has valve control function: each user table can be opened / closed through the management platform for valve control management.
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: 2.4v-4.2v (tye: 3.6V)
Working frequency: B1, B3, b5b8, B20, B28
(see attached table 1 for details of band)
Product technical parameters
|
Nominal diameter（mm） |
15 |
20 |
25 |
32 |
40 |
50 |
|
Overload dischargeQ4(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 778.1～3-2007Standard，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-IOT |
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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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Valve control function |
Open / close valve control management can be carried out for each user table through the management platform |
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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 ratio R=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 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 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
Flow error and loss curve
