Cangnan flowmeter manual

『Cangnan flowmeter manual』Related information(clamp on meter|electromagnetic meter|venturi meterrotameter|orifice meter|ultrasonic flow meter|mass flow meter|coriolis mass flow meter|coriolis flow meter|magnetic flow meter|magmeter flow meter|magflow flow meter|mag meter flow meter|electromagnetic flow meter|vortex flow meter|turbine flow meter|thermal mass flow meter|thermal flow meter|rotameter flow meter)

1. Detailed explanation of ultrasonic flowmeter sound speed calibration steps

Detailed explanation of ultrasonic flowmeter sound speed calibration steps Ultrasonic flowmeter sound speed calibration is the core operation of verifying and correcting measurement accuracy by comparing the measured sound speed with the instrument displayed sound speed. The following are detailed steps based on the latest industry standards (such as JJG 1030-2007).

1. Preparation before Calibration 1 Equipment and tools: Standard sound velocity measuring instrument (or high-precision thermometer), tested medium sample, multimeter, specialized debugging software and data cable provided by the flowmeter manufacturer

2. Environmental requirements: Ensure that the fluid is in a static state (flow rate is zero), and fully exhaust to ensure that the pipe is filled with a single medium

1. Uniform medium

3. Safety confirmation: If measuring high temperature, high pressure or corrosive media, it is necessary to confirm that the pipeline system has been depressurized and cooled down, and wear corresponding protective equipment to prevent burns or chemical injuries.

2. Calibration steps for curved fighter core 1 Method 1 (direct measurement) for obtaining the actual sound velocity value: Insert a standard sound velocity measuring instrument into the medium and directly read the sound velocity value at the current medium temperature (C_standard). *Method 2 (indirect calculation): If there is no standard instrument, a thermometer with an accuracy of ± 0.1 ℃ can be used to measure the current temperature (T) of the medium, and then calculate according to the sound velocity formula. For clear water, the commonly use

2. Read the displayed speed value * of the flowmeter. In the service menu or diagnostic interface of the flowmeter, find the parameter display items such as "current speed", "Sound Velocity" or "SV", and record their values (C_display)

3. Calculate the speed error * error Δ C=| C_display - C_standard | * Usually, the error should be less than 0.5% (specific allowable values need to refer to the accuracy indicators in the flowmeter manual). If Cong Jing exceeds the tolerance, calibration is required

4. Enter the calibration parameters (key steps) * to enter the parameter settings or calibration menu of the flowmeter. Search for options such as "Sound Velocity Calibration", "SV Adjust", "Reference SV", etc. *Accurately input and save the standard value of C_obtained in the previous step. Some instruments input a correction factor (K=C_standard/C_display) and need to be operated according to the instructions. *Warning: This step will directly affect all flow measurement results. Before entering, it is necessary to double confirm that the values are correct. 5. Verify the calibration results. Exit the menu and check the sound velocity value displayed on the flowmeter again to confirm that it has become the C-standard or the error with the C-standard is within the allowable range.

III. Key considerations * Sound velocity is a sensitive function of temperature, and during calibration, it is necessary to ensure that the medium temperature is stable and the measurement is accurate, which is the key to the success or failure of calibration.

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