HCBBS Forum (English)
Submit Chemical Projects / Find Solutions
Amplify Your Requirements on a Broader Chemical Platform *Engineering · Technology · Equipment · Solutions*
Submit Request

Installation of radar level gauges and product features

2019-07-08View Original

Thread Content

Installation instructions for radar level gauges. Recommended distance for radar level gauges: (1) From the wall to the outer wall of the mounting stub – it should be at a distance of 1/6 of the tank’s diameter from the tank wall, with a minimum distance of 200 mm. Radar level gauges (guide wave type) cannot be installed above the feed inlet (4). It cannot be installed in the center position (3); if installed there, multiple false echoes will be generated, and these interfering echoes can cause the signal to be lost. If the distance between the instrument and the tank wall cannot be maintained, the medium on the tank wall will adhere, causing false echoes; false echoes should be stored during the calibration of the instrument. Product features of radar level gauges: Radar level gauges emit extremely low-power, short microwave pulses, which are sent and received through an antenna system. Radar waves travel at the speed of light. Operating time can be converted into a level signal through electronic components. A special time extension method can ensure stable measurements in an extremely short period of time.   Even in complex operating conditions with false echoes, the latest microprocessing technology and debugging software can still accurately analyze the echoes corresponding to the liquid level. The input antenna receives the reflected microwave pulses and transmits them to the electronic circuitry; the microprocessor processes these signals to identify the echoes generated by the micropulses on the surface of the material. The accurate identification of echo signals is carried out by intelligent software, with precision reaching the millimeter level. The distance D from the surface of the material is proportional to the time duration T of the pulse: D = C×T/2, where C is the speed of light. Since the distance E of the empty tank is known, the material level L can be calculated as follows: L = E – D. Output is determined by entering the height of the empty tank E (which corresponds to the zero point), the height of the full tank F (which corresponds to the full scale), along with some application parameters; these parameters enable the instrument to adapt itself to the measurement environment. Corresponds to a 4‑20mA output.   Application medium: The intelligent radar level gauge is suitable for non-contact, continuous measurement of the level of liquids, slurries, and granular materials, and can handle large variations in temperature and pressure ; In situations where inert gases and vapors are present.   It adopts a microwave pulse measurement method and can operate properly within the industrial frequency band. It has a low beam energy, can be installed in various metal and non-metal containers or pipes, and causes no harm to humans or the environment. Precautions for radar level gauges: The measurement range starts from the point where the beam reaches the bottom of the tank. However, in special cases, if the tank bottom is concave or conical, measurement becomes impossible when the liquid level is below this point.   When the dielectric constant of the medium is low and the liquid level is low, the bottom of the tank becomes visible; to ensure measurement accuracy, it is recommended to set the zero point at a height of C.   Theoretically, it is possible to measure up to the position of the antenna, but considering the effects of corrosion and adhesion, the end of the measurement range should be at least 100 mm away from the antenna.   For overflow protection, a safety distance can be defined and added to the blind area.   The smallest measurement range is related to the antenna.   Depending on the concentration, foam can either absorb microwaves or reflect them, but it is possible to make measurements under certain conditions. Extremely short microwave pulses with very low transmission energy are transmitted and received through an antenna system. Radar waves travel at the speed of light. Operating time can be converted into a level signal through electronic components. A special time extension method can ensure stable measurements in an extremely short period of time.

Submit a Project

**Looking for Chemical Technology, Equipment & Solutions?** No Registration Required Broader Platform Exposure | Global Chemical Service Provider Connections

Submit Request — Free Consultation

Disclaimer

This is an automated machine translation of the original thread. Some technical terms may have inaccuracies; the original text shall prevail. Click "View Original" at the top right to access the source page, which supports IP-based automatic real-time language translation. Please watch out for contact details and sales inducements to prevent fraud. All content and translations are for reference only, representing solely the poster's personal views. For enquiries, email service@hcbbs.com.