Fuel dispenser metering tips
The knowledge of fuel dispenser measurement involves multiple aspects, including technical specifications, regulatory requirements, measurement principles, and precautions for consumers during use. Here are some key fuel dispenser metering tips:
Firstly, the technical specifications and supervision of fuel dispensers
Maximum allowable error: The maximum allowable error of the fuel dispenser is ± 0.3%, and the repeatability error does not exceed 0.15%. This means that under normal use, the measurement error of the fuel dispenser should be controlled within this range.
Manufacturing and Inspection:
Fuel dispenser manufacturers need to obtain a type approval certificate for measuring instruments issued by the government's metrological administrative management department before they can proceed with production.
Fuel dispensers must be subject to mandatory calibration by legally authorized metrology institutions authorized by government departments, and can only be put into use after passing the inspection. During use, it is necessary to undergo mandatory calibration twice a year (or sometimes every six months) by a legal metrological calibration institution.
Automatic locking function: When the fuel dispenser exceeds the error range and accumulates five errors exceeding 0.6%, the fuel dispenser will automatically lock. At this point, the market supervision bureau needs to investigate the situation and unlock it before it can be reused.
Maintenance and calibration: The maintenance of fuel dispensers should be carried out by units with legal maintenance qualifications. After repair, the fuel dispenser must be re inspected and qualified by a legal metrological calibration institution before it can be put back into use.
Anti cheating measures: To prevent cheating behavior, legal metrology institutions will attach lead seals with legal metrology institution codes to important positions such as the motherboard and encoder of fuel dispensers. This lead seal is unique and cannot be replaced or adjusted arbitrarily.
Secondly, the principle of fuel dispenser measurement
Flow meter principle: The Flow meter in the fuel dispenser is used to measure the amount of oil flowing through the oil pipe. There are two common types of flow meters: turbine flow meters and volumetric flow meters. Turbine flow meters measure oil volume by measuring the turbine speed in the oil flow, while volumetric flow meters measure the volume flowing through a fixed container.
Electronic computing principle: The computer inside the fuel dispenser will calculate the amount of fuel required to be paid by the refueling vehicle based on the measurement results of the flow meter, oil density, and other parameters. In the calculation process, factors such as temperature compensation and capacity correction will also be considered to improve the accuracy of measurement.
Principle of metering sensor: The metering sensor in the fuel dispenser is used to measure the temperature and density of the fuel, in order to further correct the fuel quantity and ensure the accuracy of the measurement.
Safety control principle: The fuel dispenser is also equipped with safety control devices, such as spill prevention devices, lightning protection devices, and anti-static devices, to ensure the safety and reliability of the refueling process.
Thirdly, consumer usage precautions
Check the mandatory inspection mark: Before refueling, check whether the fuel dispenser is affixed with a mandatory inspection qualified mark within its validity period, and confirm whether the lead seal is intact.
Confirm that the fuel dispenser is reset to zero: Before refueling, pay attention to the information on the fuel dispenser display screen to ensure that, except for the unit price, all other fuel quantities and amounts are displayed as zero.
Verify the quantity and amount of fuel added: After refueling, it is necessary to verify whether the quantity and amount of fuel added are correct, and request an invoice as proof of consumption.
Pay attention to seasonal changes: Due to thermal expansion and contraction, seasonal changes and even temperature fluctuations at night and day may affect the accuracy of fuel dispenser measurements. But generally speaking, this impact can be ignored for ordinary consumers.
In summary, understanding the small knowledge of fuel dispenser measurement is of great significance for safeguarding consumers' own rights and interests. Consumers should remain vigilant when using fuel dispensers, pay attention to checking relevant signs and display information, and ensure the accuracy and safety of the refueling process.The knowledge of fuel dispenser measurement involves multiple aspects, including technical specifications, regulatory requirements, measurement principles, and precautions for consumers during use. Here are some key fuel dispenser metering tips:
Firstly, the technical specifications and supervision of fuel dispensers
Maximum allowable error: The maximum allowable error of the fuel dispenser is ± 0.3%, and the repeatability error does not exceed 0.15%. This means that under normal use, the measurement error of the fuel dispenser should be controlled within this range.
Manufacturing and Inspection:
Fuel dispenser manufacturers need to obtain a type approval certificate for measuring instruments issued by the government's metrological administrative management department before they can proceed with production.
Fuel dispensers must be subject to mandatory calibration by legally authorized metrology institutions authorized by government departments, and can only be put into use after passing the inspection. During use, it is necessary to undergo mandatory calibration twice a year (or sometimes every six months) by a legal metrological calibration institution.
Automatic locking function: When the fuel dispenser exceeds the error range and accumulates five errors exceeding 0.6%, the fuel dispenser will automatically lock. At this point, the market supervision bureau needs to investigate the situation and unlock it before it can be reused.
Maintenance and calibration: The maintenance of fuel dispensers should be carried out by units with legal maintenance qualifications. After repair, the fuel dispenser must be re inspected and qualified by a legal metrological calibration institution before it can be put back into use.
Anti cheating measures: To prevent cheating behavior, legal metrology institutions will attach lead seals with legal metrology institution codes to important positions such as the motherboard and encoder of fuel dispensers. This lead seal is unique and cannot be replaced or adjusted arbitrarily.
Secondly, the principle of fuel dispenser measurement
Flow meter principle: The flow meter in the fuel dispenser is used to measure the amount of oil flowing through the oil pipe. There are two common types of flow meters: turbine flow meters and volumetric flow meters. Turbine flow meters measure oil volume by measuring the turbine speed in the oil flow, while volumetric flow meters measure the volume flowing through a fixed container.
Electronic computing principle: The computer inside the fuel dispenser will calculate the amount of fuel required to be paid by the refueling vehicle based on the measurement results of the flow meter, oil density, and other parameters. In the calculation process, factors such as temperature compensation and capacity correction will also be considered to improve the accuracy of measurement.
Principle of metering sensor: The metering sensor in the fuel dispenser is used to measure the temperature and density of the fuel, in order to further correct the fuel quantity and ensure the accuracy of the measurement.
Safety control principle: The fuel dispenser is also equipped with safety control devices, such as spill prevention devices, lightning protection devices, and anti-static devices, to ensure the safety and reliability of the refueling process.
Thirdly, consumer usage precautions
Check the mandatory inspection mark: Before refueling, check whether the fuel dispenser is affixed with a mandatory inspection qualified mark within its validity period, and confirm whether the lead seal is intact.
Confirm that the fuel dispenser is reset to zero: Before refueling, pay attention to the information on the fuel dispenser display screen to ensure that, except for the unit price, all other fuel quantities and amounts are displayed as zero.
Verify the quantity and amount of fuel added: After refueling, it is necessary to verify whether the quantity and amount of fuel added are correct, and request an invoice as proof of consumption.
Pay attention to seasonal changes: Due to thermal expansion and contraction, seasonal changes and even temperature fluctuations at night and day may affect the accuracy of fuel dispenser measurements. But generally speaking, this impact can be ignored for ordinary consumers.
In summary, understanding the small knowledge of fuel dispenser measurement is of great significance for safeguarding consumers' own rights and interests. Consumers should remain vigilant when using fuel dispensers, pay attention to checking relevant signs and display information, and ensure the accuracy and safety of the refueling process.
Wenzhou Jiahao Petroleum Machinery Co, Ltd is a professional manufacturer of petroleum machinery products since 2010. The main products are Fuel dispenser components including Automatic Fuel nozzle, Adblue DEF Nozzle, Vapor Recovery Nozzle, Flowmeter and Fuel pumps.
