Product Description
Product description
The horizontal screw-wing large-diameter non-magnetic NB-loT water meter is based on the dry multi-beam screw-wing water meter. It adopts an integrated intelligent water meter that combines non-magnetic sensing and NB-IoT network communication technology, and adopts electromechanical separation. The structure is easy to maintain and is mainly used for water metering in industries, enterprises and institutions with large water consumption.
Product features
-
- No wiring or relay equipment required;
- Adopts NB-IoT network communication for data remote transmission, which features wide coverage, large connections, low power consumption, and low cost; adopts new non-magnetic sensor electromechanical conversion technology, and the conversion measurement accuracy can reach ±10 liters;
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- The electronic module and the base meter are installed separately, with good interchangeability;
- Ultra-low power consumption design, long service life;
- IP68 waterproof design.
Traffic parameters
| Nominal diameter DN (mm) |
Overload flow Q4 (m3/h) |
Common traffic Q3 (m3/h) |
Boundary flow Q2 (m3/h) |
Minimum flow Q1 (m3/h) |
Range ratio R(Q3/Q1) |
Minimum reading M in(m3) |
Maximum reading Max(m3) |
Accuracy
Level |
Temperature level
(℃) |
| 40 |
1 .25× Q3 |
25/40 |
1 .6 × Q1 |
Q3 ÷R |
50/ 100/ 160 |
0 .0005 |
999999 |
2 |
T30/T90 |
| 50 |
63 |
| 80 |
100 |
| 100 |
160 |
| 150 |
400 |
| 200 |
630 |
| 250 |
630 |
| 300 |
1000 |
Maximum allowable error
A. The maximum allowable error in the low zone from including the minimum flow rate (Q1) to excluding the boundary flow rate (Q2) is ±5%;
B. The maximum allowable error in the high zone from including the boundary flow (Q2) to including the overload flow (Q4) is ±2%.
(±2% when water temperature ≤30°, ±3% when water temperature >30°)
Electronic module technical parameters
| Downlink communication method |
RS-485 |
NB-iot |
| Operating voltage |
DC 7 5- 16V |
DC3 6V |
| quiescent current |
< 1 .2 mA |
<5 uA |
| Communication module |
HD588ADR |
N21/N308/MN316 |
| Electromechanical conversion method |
No magnetic sensing |
No magnetic sensing |
| Electromechanical conversion accuracy |
±10 liters |
±10 liters |
| Communication baud rate |
2400bps |
Mobile/telecommunications |
| Communication line definition |
|
Red Blue Yellow Black |
Power supply (+) RS485 B- RS485 A+ Ground wire (GND) |
|
