GF flowmeter manual | Why does the newly installed GF flowmeter have a higher flow rate?

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1. What are the reasons for the small measurement value of GF868 ultrasonic flowmeter?

Common reasons for the small measurement value of GF868 ultrasonic flowmeter. 1 Installation issue: Insufficient straight pipe section: The installation position of the sensor is too close to the elbow, valve and other components. The upstream should ensure a straight pipe section with a diameter of 10-20 times the pipe diameter, and the downstream should ensure a diameter of 5 times the rubber diameter. Otherwise, uneven flow velocity distribution will lead to low measurement values. Installation method error: probe spacing not set according to standards, dry coupling agent or uneven application can cause signal attenuation; Inaccurate depth of the plug-in probe can alter the sound wave path. Inconsistent pipeline conditions such as noisy matching: The diameter set by the instrument is not consistent with the actual diameter, which can lead to errors in cross-sectional area calculation

2. Fluid state affects the presence of bubbles or impurities: Bubbles or solid particles in the liquid can scatter ultrasonic waves, resulting in a decrease in signal strength. Non full pipe flow: When the pipeline is not filled with fluid, the flow velocity distribution is abnormal, and conventional algorithms cannot accurately calculate the average flow velocity. Changes in medium characteristics: Failure to compensate for temperature and pressure in real time (such as a 0.3% change in sound velocity for every 1 ℃ change in water temperature), or high fluid viscosity affecting sound wave propagation

3. Equipment and signal problems: Improper installation of sensors: the top of horizontal pipelines is prone to gas accumulation, a

nd the bottom is prone to scale accumulation. When the vertical pipeline flow direction is not full, it will cause measurement distortion. Surface problems of pipelines: Rust, uncleaned paint, or scaling on the inner wall can weaken the signal; The material of the pipeline (such as fiberglass) or the installation of welding joints can also affect the transmission of sound waves. External interference: Strong vibrations or the presence of turbulence elements such as valves and orifice plates nearby can interfere with the accuracy of time difference measurement. 4. Incorrect instrument and calibration parameter settings: Basic parameters such as sound velocity and pipe diameter are not configured according to actual medium and pipeline conditions. Low flow rate accuracy limitation: When the resolution of time difference measurement is insufficient, small flow rate changes cannot be accurately captured. It is recommended to prioritize checking the installation conditions and fluid status, confirm that the parameter settings are correct, and recalibrate or replace the installation position if necessary.

2. Is there a depth requirement for the installation of GF rotary flow meters? What is the specific depth requirement?

When installing rotary flow meters, there is a depth requirement, usually at a point beyond the pipeline, usually at 1/4 of the position.

3. Why does the newly installed GF flowmeter have a higher flow rate?

There may be multiple reasons for the high flow rate of the newly installed GF (Gas Flowmeter) flowmeter, and the following are some common reasons:

1. Incorrect installation direction.

. The flowmeter needs to be installed in the direction indicated, and only

GF flowmeter manual | Why does the newly installed GF flowmeter have a higher flow rate?

1. What are the reasons for the small measurement value of GF868 ultrasonic flowmeter?

2. Is there a depth requirement for the installation of GF rotary flow meters? What is the specific depth requirement?

3. Why does the newly installed GF flowmeter have a higher flow rate?

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