Ultrasonic gas meter

Serial Number

Functions

Comments

1

Metering function

1. Ultrasonic measurement

2

Gas metering data history memory 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

The main battery is the normal power supply, and the other battery is the backup battery

4

Main battery capacity level indication

1. report that current battery capacity level suffix to the server in each metering data message uplink report

2. Low battery threshold: 20% and will trigger the uplink report of low battery capacity alarm message, which will be reported every 24 hours until the standby battery switch threshold.

3. Battery switch threshold: 10% capacity will trigger the backup battery switch.

5

Backup the battery switch only in the following cases, otherwise use the main battery

1. Pull out the main battery or the main battery does not exist

2. The power of the main battery meets the switching threshold (10%)

3. The backup battery switch is automatic, so it will never be powered off.

6

Backup Battery Function

1. Maintain local metering of water flow

2. measurement data history storage and maintenance proces

3. Spare battery life should exceed at least 7 days

4. When the power supply is switched to the backup battery, the backup battery switch alarm information will go up to the server to tell the switch that it has occurred.

7

Backup battery protection during transportation

Prior to field activation, the gas meter is only equipped with a spare battery, which is protected against consumption during storage or transportation at this stage

8

Wireless/wired technology

Lorawan/NBIOT/GPRS/RS485

9

Fixed time measurement data report

1. Latest cumulative measurement data

2. Gas meter status: valve status/power supply

3. Battery capacity level

4. Downlink Signal Strength Indication RSSI/SNR

10

Alarm Message Uplink Report

1. Battery Capacity Low Level Alarm

2. Backup battery switch alarm

3. Valve fault alarm

4. Vibration alarm (the meter has a buzzer, which can realize sound alarm when vibrating and is generally used for earthquake protection)

5. High temperature alarm (alarm is not realized at present, only temperature is monitored, which is generally used for fire protection)

11

Downlink Configuration/Query

1. Set/Query Periodicity of Periodic Measurement Data Report

2. On/Off/Setting/Query/Time of Fixed Time Measurement Data Report

3. Modify accumulated traffic data for calibration

4. Read the current accumulated traffic data

5. Read the battery capacity level

6. Valve Control Close/Open

12

Screen digital display

1. The screen displays four screens, and the screen can be cut

2. Display contents: current reading, electric quantity, balance, valve status, signal status, temperature, time and vibration reminder

3. Display mode: The button lights up and automatically closes after 5 seconds without operation, and the screen can be cut

13

433 air leakage detection linkage valve closing

1. Monitor methane in real time, and give an alarm if the concentration exceeds 5% LEL

2. Receive sensor data through 433 communication, and perform valve closing operation

Communication distance 50m (recommended to be installed near gas meter)

Technical parameter name

Unit

G1.6/G2.5/G4

Measurement Range

M ³/h

0.025 ~ 10

Interface mode

\ "You know,\"

G1 1/4 "

Interface spacing

Mm

130

Dimensions

Mm

250*150*127

Weight

Kg

1.1

Battery

\ "You know,\"

3 # alkaline batteries

Accuracy grade

\ "You know,\"

1.5

Measurement error

\ "You know,\"

Qmin < Q < Qt ± 3%

Qt < Q < Qmax ± 1.5%

Working pressure

KPa

10 ~ 20

Operating temperature

C

-20 ~ +50

Explosion-proof grade

\ "You know,\"

Exib II B T3 Gb

Level of protection

\ "You know,\"

IP65

Communication Support

Lorawan/NBIOT/GPRS/RS485/ICcard