Description
The smart diaphragm gas meter is originally an ETC or ETPC diaphragm gas meter that is equipped with a remote reading and data transmission module. These gas meters are manufactured in different sizes from G4 to G160. Gas Souzan company manufactures and designs electronic board used inside these gas meters by itself. In addition to the gas meter, the complete set of remote reading system includes server software and also a data collector according to the type of data transmission module.
As mentioned in the section of ETC and ETPC gas meters, there is a need for accurate natural gas measurement, volume correction the process of taking a gas meter’s uncorrected volume and converting it to corrected volume based upon the effects of temperature and pressure. In addition to volume correction, the electronic board has four other important tasks:
- Identifying unauthorized manipulations of the gas meter, such as, gas meter box is unsealed , using a magnet, etc.
- Sending meter information, including consumption volume, alarms, etc., to the server for remote reading and control.
- Digital display of consumption volume, temperature, alarms, etc. on the gas meter.
- Storing meter information in the stable memory of the board for future reference.
The limitation of the available space for the board, the limitation of power losses and compliance with the explosion-proof design requirements have complicated and time-consuming the selection of electronic components, board design and microcontroller coding. But the result of the work is a product with the following capabilities, all of which are of particular importance to the consumer of this product (National Gas Company of Iran):
- Designing a 10-year low-consumption circuit for a A4 lithium
- Equipped with several types of manipulation sensors to reduce the possibility of gas manipulation and theft.
- Converting the volume of consumed gas to the standard volume of calculating the legal and fair amount of consumed gas.
- Remote reading of the meter, notification of the failure and manipulation of the meter in the minimum time, reducing the time and cost of reading the meters and issuing an online bill.
- Circuit design based on explosion-proof design requirements, safe use of this meter in domestic, commercial and industrial uses.
The electronic board of these gas meters can be equipped with one or two lithium batteries in A, C, and D sizes, and its lifespan varies from 5 to 10 years, depending on the type of data transmission module. Also, the electronic board is equipped with an LCD screen with very low power to display the uncorrected index (number-mechanical gauge) and the gas meter. At the same time, alarms related to battery and unauthorized manipulations, etc., can be seen on this display.
Smart gas meters are manufactured by Gas souzan can be provided on three communication platforms:
- Wireless M-Bus: these meters are equipped with RF module with wM-Bus protocol, which can receive meter information at a maximum distance of 200 meters. The way to get the information of these meters can be done by walk by tablet or by fixed reading and placing a data collector (DC), and sending the information of the meters on the server.
- LoRaWAN: LoRa module is used in these gas meters, which has a range of sending information up to several kilometers. Gateway is used to receive information and this information is sent to the central server on the Internet platform.
- GSM/GPRS: with the help of the GSM/GPRS module and inserting the SIM card inside the gas meters, the meter information can be viewed directly on the server.
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