How to check the accuracy and error range of fuel dispenser measurement

The inspection of the measuring accuracy and error range of the fuel dispenser is an important step in ensuring accurate measurement. This process typically involves multiple steps and tools to ensure the accuracy and reliability of the inspection results. The following is a detailed introduction to the inspection methods for measuring accuracy and error range of fuel dispensers:

Firstly, preparation for inspection

Tool preparation: Prepare necessary calibration tools such as calibration gauges, Flow meters, thermometers, electrostatic voltmeters, and electronic scales, and ensure that these tools have been calibrated and comply with national metrology laws and regulations.

Environmental preparation: Ensure a stable, dry, and temperature stable testing environment to avoid the influence of environmental factors on the test results.

Secondly, inspection steps

Appearance inspection

Check the label: Check if there is a qualified inspection label posted on the fuel dispenser panel, and confirm if the fuel dispenser has undergone mandatory inspection and is within the inspection validity period.

Check the lead seal: Check whether the lead seals of the fuel dispenser control motherboard, encoder, and flow measurement converter are intact, and confirm whether there are any illegal activities such as unauthorized modification, disassembly, etc.

Certificate and Data Inspection

View certificate: Check whether the fuel dispenser calibration certificate is complete and continuous, and confirm the validity and accuracy of the certificate.

Check data: Use professional equipment to check whether the data of the fuel dispenser motherboard chip is abnormal, whether the anti cheating function is enabled, and whether self calibration work has been carried out.

On site verification

Flow verification: Verify according to standard flow rate, with an error requirement within ± 0.15%. This usually requires the use of tools such as flow meters for actual measurement and comparison with the values displayed on the fuel dispenser.

System error verification: Check each component in the measurement system one by one to ensure that their errors are within the specified range. This includes checking for errors in flow measurement converters, etc.

Instrument error calibration: Check the error of each display device of the fuel dispenser, and ensure that the error does not exceed ± 0.5%. This can be achieved by comparing with standard instruments.

Error recording and judgment

Record error values: Record the error values of the fuel dispenser at various ranges for subsequent analysis and judgment.

Judging the range of error: Refer to the fuel dispenser manual and relevant national standards to determine whether the error of the fuel dispenser is within the specified range. Usually, the maximum allowable error of a fuel dispenser is ± 0.3%, and its repeatability should not exceed 0.15%.

Thirdly, handling measures

Repair or replacement: If the error of the fuel dispenser exceeds the specified range, timely repair or replacement of relevant components should be carried out to ensure the measurement accuracy of the fuel dispenser.

Regular calibration: Gas stations should regularly calibrate and maintain fuel dispensers to ensure their normal working condition and accuracy.

Fourth, precautions

When conducting fuel dispenser error calibration, relevant standards and operating procedures should be strictly followed to ensure the accuracy and reliability of test results.

During the verification process, attention should be paid to safety to avoid accidents.

The fuel dispenser should be kept clean and dry during use to avoid impurities and moisture from affecting its effectiveness and error calibration results.

By implementing the above steps and precautions, the measurement accuracy and error range of the fuel dispenser can be effectively checked, ensuring the accurate measurement of the fuel dispenser and the legitimate rights and interests of consumers.

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.