一、Product Summary
Ultrasonic water meter is used to accurately measure the flow rate. The product has the characteristics of beautiful appearance, convenient installation, accurate measurement, stable operation, strong anti-pollution and anti-corrosion capability, long service life, small pressure loss, economy and practicality, etc. It is suitable for flow metering and charging of domestic water, central air conditioning system water, etc.
Implementation standard: GB/T 778 Measurement of water flow in closed full pipeline Drinking cold water meter and hot water meter JJG 162-2009 Cold water meter
二、Working Principle
Ultrasonic water meter adopts the principle of ultrasonic wave. It is a kind of water meter that further calculates the flow rate of water by analyzing and processing the time difference caused by the change of speed when ultrasonic sound beam propagates downstream and countercurrent in water.
三、Function List
|
Serial Number |
Functions |
Comments |
|
1 |
Metering function |
Accumulated flow of real-time Hall counter |
|
2 |
Water metering data history storage local |
1. For the latest 90 days, the measurement data is stored every hour 2. The latest 180 days, the measurement data is stored every day 3. Monthly storage of measurement data in the latest year |
|
3 |
Power supply |
1. Battery powered 2. External power supply |
|
4 |
Main battery capacity level indication |
The suffix of that current battery capacity level is report to the server in each metering data message uplink report |
|
5 |
LED indication |
Communication events; Screen Cutting Event |
|
6 |
Manual triggering (triggering varies according to different models) |
Button triggers an escalation event Magnet triggers report event Trigger 1 second switch screen Trigger 2 seconds to report data Trigger more than 9 seconds to restart the device |
|
7 |
Wireless technology |
Lorawan/NB/GPRS |
|
8 |
External Interface |
RS485/Mbus |
|
9 |
Periodic reporting |
1 The default period is 24 hours Latest cumulative measurement data Water meter status: valve status/power supply Battery Capacity Level Downlink Signal Strength Indication |
|
10 |
Timed reporting |
1 Fixed time (for example, 23:00, also configurable) triggers metering data reports every day, and the message payload is the same as the periodic report Latest cumulative measurement data Water meter status: valve status/power supply Battery Capacity Level 5LoRaWAN Downlink Signal Strength Indication RSSI/SNR |
|
11 |
Alarm Message Uplink Report |
Battery Capacity Low Level Alarm Backup Battery Switch Alarm Valve fault alarm |
|
12 |
Screen digital display |
1 Display Content: Current Reading, Electricity Quantity, Balance, Valve Status (Default on, Because Cold Water Meter Has No Valve) 2 Display mode: normally bright (low power consumption screen) |
|
13 |
Mode of transport |
In the transportation mode, log is closed, communication is closed, pulse is not metered, and the operation with minimum power consumption is maintained |
|
14 |
Antenna (Nb/Lorawan/GPRS) |
Built-in antenna (spring/soft antenna) External antenna (chuck antenna) |
|
15 |
Infrared Configuration (Optional, Default None) |
Infrared Setting/Read Table Parameters Infrared Update Program |
|
16 |
Communication mode |
Supported Band |
|
|
M66 (GPRS Communications) |
850/900/1800/1900MHz |
|
|
BC26 (NB Communications) |
B1/B2/B3/B4/B5/B8/B12/B13/B17/B18/B19/B20/B25/B26/B28/B66 |
|
|
BC35G (NB Communications) |
B1 @ H-FDD: 2100 MHz B3 @ H-FDD: 1800 MHz B8 @ H-FDD: 900 MHz B5 @ H-FDD: 850 MHz B20 @ H-FDD: 800 MHz B28 @ H-FDD: 700 MHz |
|
|
BG96 (NB/GPRS/CATM Communications) |
Cat M1/Cat NB1: LTE FDD: B1/B2/B3/B4/B5/B8/B12/B13/B18/ B19/B20/B26/B28 LTE TDD: B39 (For Cat M1 Only) EGPRS: 850/900/1800/1900MHz BG96-M Cat M1: LTE FDD: B1/B2/B3/B4/B5/B8/B12/B13/B18/ B19/B20/B26/B28 LTE TDD: B39 |
|
|
BC66 (NB Communications) |
B1/B2/B3/B4/B5/B8/B12/B13/B17/B18/B19/B20/ B25/B26*/B28/B66 |
|
|
Lorawan Newsletter |
CLASSA, CLASSB and CLASSC modes are supported, and the supported frequency bands are shown in the attachment |
|
|
RS485 communication |
Four lines: red +, black-, yellow A, blue B |
四、Performance characteristics
1. There are no moving parts in the ultrasonic water meter body, mechanical wear can be used stably and reliably for a long time, and measurement accuracy can be maintained for a long time.
2. The ultrasonic water meter has a large range ratio and a small initial flow rate, and the range ratio of the water meter can reach: R250, R400; The initial flow rate of the water meter can be as small as 2-3 liters per hour.
3. The measurement accuracy of ultrasonic water meter is after operation, but factory inspection can be required according to Grade 1 accuracy standard.
4. Ultrasonic water meter has strong adaptability to fluid temperature changes, and can achieve T30/T50/T70 temperature grade.
5. Ultrasonic water meter has strong antistatic and anti-magnetic interference capabilities, and antistatic can reach more than 12000V V.
6. The ultrasonic water meter adopts micro-power consumption design technology to minimize the comprehensive power consumption of the water meter and has a service life of more than 6 +2 years.
7. Ultrasonic water meter can choose a variety of communication modes, such as NB-IOT. LoRa, LoRaWAN, M-Bus. RS485, pulse, etc., and is equipped with infrared communication mechanism, through which instrument parameters can be configured or instrument data can be read.
8. Ultrasonic water meter has the function of long-term data storage, which can realize data storage and recording of year, month and day, which is beneficial for management departments to analyze water consumption big data and make reasonable water consumption decisions.
9. Ultrasonic water meter has a water flow direction identification mechanism, which can measure forward and reverse flow, and can adopt a variety of forward and reverse flow statistics and display methods, so as to use units for data analysis.
10. The ultrasonic water meter has an alarm mechanism for long-term water running (leakage alarm) and an oath reporting mechanism for a single water running exceeding a preset amount, which can timely remind users whether there is water leakage in the household water pipe and whether they forget to turn off the faucet.
11. The ultrasonic water meter has an empty pipe alarm mechanism, which can be used as an abnormal disassembly alarm after running water normally for a long time.
12. The ultrasonic water meter has an error counting (instantaneous excessive flow metering) judgment mechanism. When an error counting occurs, it can give an alarm in time and record the error time. When an error counting occurs, the MCU software in the meter has an error correction mechanism, which can prevent the occurrence of an error counting to the greatest extent.
13. Ultrasonic water meter has the function of measuring fluid water temperature, and can give low temperature or high temperature alarm, so that the management department can deal with it in time.
14. The combination of ultrasonic water meter and management system can have a family water care mechanism. When the family children are not with the elderly, the children or the community where the elderly are located can know the water habits of the elderly through mobile phone APP, which can give early warning in time.
五、Technical Parameters
|
Caliber |
DN15 |
DN20 |
DN25 |
|
Minimum Flow (Q1) |
0.01 |
0.016 |
0.025 |
|
Boundary Flow (Q2) |
0.016 |
0.025 |
0.126 |
|
Maximum Flow (Q3) |
2.5 |
4 |
6.3 |
|
Nominal Flow (Q4) |
3.125 |
5 |
7.9 |
|
Range ratio |
250 |
||
|
Accuracy grade |
Class B |
||
|
Working pressure |
≤ 1. 0MPa |
||
|
Pressure loss |
P40 |
||
|
Level of protection |
IP65 |
||
|
Working water temperature |
5 ~ 55 ℃ |
||
|
Communication mode |
Lorawan/NB/GPRS/RS485 |
||
|
Power supply |
3.6 V |
||
|
Key |
Magnetic induction button |
||
|
Screen |
LCD8 bits |
||
|
Display Range |
0 m ³ ~ +99999.999 m ³ |
||
六、Product structure and size
| cal | DN15/20/25 |
| Range ratio | R250 |
| Accuracy grade | Class B |
| Working pressure | ≤1.0Mpa |
| Pressure loss | Δp40 |
| Level of protection | IP65 |
| Working water temperature | 5~55℃ |
| Communication mode | Lorawan / NB / GPRS / RS485 |
| Power supply | 3.6V |
| Key | Magnetic induction button |
| Screen | LCD8 bits |
| Display Range | 0m³～＋99999.999m³ |
