Turbine flowmeter calibration regulations

Project Overview

Turbine flowmeter calibration procedures are standard procedures developed to ensure the correct use and performance of turbine flowmeters. The following is a detailed explanation of the turbine flowmeter calibration procedures, summarized and summarized based on the content of the reference article:

1. Definition and scope of application

The turbine flowmeter is a A flow measuring instrument that works on the turbine principle and is used to measure and monitor the flow rate in fluids. The calibration procedures are applicable to the calibration of turbine flow meters installed in industrial pipelines or other devices. The media used can be non-corrosive liquids, gases and steam.

2. Quoting standards

When calibrating turbine flowmeters, relevant national standards or technical specifications are usually quoted, such as GB/T "Technical Requirements for Natural Gas Metering Systems" and JJG "Turbine Flowmeter Calibration Regulations" etc.

3. Verification conditions

1. Environmental conditions: The calibration of the turbine flowmeter needs to be carried out under certain environmental conditions. The temperature range is usually required to be (5~45)℃, and the relative humidity is generally 15%~95%. Atmospheric pressure is generally (70~106)kPa. At the same time, the environment should be free of significant shaking, impact and external magnetic field interference.

2. Working power supply and power requirements: The working power supply is usually DC 24V, and the power requirement generally does not exceed 50W.

   

4. Verification requirements

1. Setting of flow range: required to comply with national standards.

2. Accuracy of calibration data: should comply with national standards Required accuracy.

3. On-site zero calibration: The accuracy required by national standards should be met.

4. On-site testing. : The accuracy should meet the requirements of national standards.

5. Calibration report: All surface conditions, experimental data, etc. should be accurately recorded, and the accuracy and performance of the turbine flow meter should be accurately recorded. To facilitate the comparability of test results.

   

5. Calibration steps

1. Site preparation: Check whether the installation and wiring status of the device are correct, check whether the instrument is installed correctly, and check whether the instrument interface is complete , check whether the instrument leakage alarm is normal, and determine whether the measuring medium complies with national standards.

2. Zero adjustment: After the flowmeter is installed on the pipeline, reset the flowmeter when no load. The flow indication reading is set to zero. When zeroing and adjusting, the accuracy of the meter is required to meet the requirements of national standards.

3. On-site installation inspection: Check whether the turbine flow meter is installed correctly. , whether the wiring of the instrument is correct, whether the instrument is defective, whether the indication on the instrument panel is normal, etc.

4. On-site testing: Conduct on-site testing in accordance with national standards, including flow range. Settings, accuracy testing of calibration data, etc.

5. On-site calibration report: Based on the results of the on-site test, prepare a calibration report and record all relevant data and conclusions.

   

6. Calibration methods

The calibration methods of turbine flow meters mainly include direct measurement method and indirect measurement method. The direct measurement method is to compare the measured quantity with the standard quantity. Comparative measurement method, the indirect measurement method is to determine the measured value by measuring other quantities that have a functional relationship with the measured value.

The above is a detailed explanation of the turbine flowmeter calibration procedures.In actual operation, calibration should be carried out in strict accordance with relevant standards and regulations to ensure the accuracy and reliability of the turbine flowmeter.