1. No display upon power-on: Check if the power supply properties correspond to the instrument's rated values. For example, confirm whether the input voltage is AC220V or DC24V, and whether the frequency meets the requirements. Avoid starting failure due to excessively high or low voltage. Also check if the power fuse is blown.
2. Instrument cannot be used under strong interference in the field? Possible causes include: large fluctuations in the power supply range, leading to unstable instrument operation; interference from nearby frequency converters or strong magnetic fields, such as electromagnetic radiation from nearby large motors, transformers, etc.; incorrect grounding, leading to static electricity accumulation and signal interference. Solutions: Provide a stable power supply for the instrument; install the instrument away from frequency converters and strong magnetic field interference, maintaining a distance of at least 3 meters, and use shielded cables for wiring; ensure a good grounding wire, reliably connecting the instrument casing and signal ground to an independent grounding electrode according to specifications.
3. Large fluctuations in instantaneous flow meter readings? Possible causes include: A) Large signal strength fluctuations, manifested as inconsistent signal strength, possibly affected by ambient temperature changes, pipe vibration, or probe loosening; B) Large fluctuations in the measured fluid itself, such as the presence of numerous air bubbles, impurities, or unstable flow velocity, causing fluctuations in the flow measurement value. Solution: Adjust the probe position to increase signal strength (maintaining it above 3%) to ensure signal stability and reduce measurement errors caused by weak signals.
4. Low signal from clamp-on flowmeter? Possible causes include: excessively large pipe diameter, such as exceeding the instrument's maximum applicable range, leading to severe sound wave attenuation; severe pipe scaling, hindering sound wave propagation. Solution: For excessively large pipe diameters and severe scaling, it is recommended to use an insertion probe to directly contact the pipe wall to enhance signal transmission; or choose a "Z" type installation method to extend the sound wave propagation path, improving signal reception efficiency, while ensuring a tight fit between the probe and the pipe wall.
5. Signal decreases after a period of use for insertion ultrasonic flowmeter probes? Possible causes include probe misalignment, caused by pipe vibration or insecure installation, leading to the probe deviating from its optimal measurement position and altering the sound wave propagation angle; or thick scale buildup on the probe surface, which, after prolonged use, affects sound wave transmission and reception. Solutions: Readjust the probe position, using a calibration tool to ensure the probe is aligned with the pipe centerline and maintain the correct installation angle; clean the probe's emitting surface with a specialized cleaning agent to remove surface scale, oil, and other contaminants. If necessary, disassemble the probe for thorough cleaning to restore its optimal sound wave transmission performance.
