HOTLINE 0086-29-88606479
  Tel: 86-29-88606479   E-mail: sales@dechuang-auto.com

NEWS

About us

Radar level meter lightning protection

DATE: 2020-09-29
BROWSE TIMES: 183
Measures against lightning strikes for radar level gauges


With the need for the development of industrial automation, the instrumentation industry has developed rapidly. However, most of these intelligent instruments, which use a large number of micro-electric devices, have low insulation strength and primary problems with surge resistance. Therefore, the lightning protection of smart instruments and meters is very important, especially during the thunderstorm season to avoid huge losses.


Guided wave radar level gauge instrument lightning protection, we must start unilaterally, including internal system lightning protection and internal system lightning protection, generally mainly by participating in lightning protection devices. Specifically, the following methods can be used to develop lightning protection.

1. Lightning protection starts with grounding systems. The casing of the radar level gauge is very similar to the control cabinet, monopoly, power cabinet, etc. The casings are all adjacent to each other with flat steel. The instrument task power supply, such as the 24V negative terminal, is connected to the instrument signal ground, and the input and output signal ground of the totalizer to form an equipotential. Intrinsically safe grounds, safety barriers, barriers, safety devices and other grounding should also consider whether the instrument signal reference point can be equipotential when it is adjacent.

2. The lightning protection of the power supply of smart instruments and meters cannot be ignored. Install anti-surge systems for smart instruments and meters to ensure that the instrument does not exceed the withstand voltage limit. The surge injection device is required to send the overload current into the earth when a thunderstorm is induced by a thunder surge.

3. To equip smart instruments with trust number channel surge generators, not only to ensure that the dynamic transmission is accurate, stubborn, and agile, but also to discharge the piezoelectric surge to the ground during thunderstorms to ensure the safety of signal transmission.

4. Regularly develop, search and repair the power supply system grounding, bus bars, grounding bodies, surge devices, power lightning protection grids of smart instruments and meters, and change them in time.

Precautions for selection

The correct selection of the radar level gauge can ensure the better use of the radar level gauge. What kind of radar level gauge should be selected according to the physical and chemical properties of the fluid medium to be measured? Make the diameter, flow range, lining material, electrode material and output current of the radar level gauge suitable for the test The nature of the fluid and the requirements for flow measurement.

1. Precise function inspection

Accuracy grade and function Choose the instrument accuracy grade according to the measurement requirements and use occasions, so as to be economical and cost-effective. For example, for trade settlement, product handover and energy metering, you should choose a higher accuracy level, such as 1.0, 0.5, or higher; for process control, choose different accuracy levels according to the control requirements; some only It is to check the process flow and do not need to do precise control and measurement. You can choose a lower accuracy level, such as 1.5, 2.5, or even 4.0. At this time, you can choose a cheap plug-in radar level meter.

2. Measurable medium

When measuring medium flow rate, instrument range and caliber, when measuring general medium, the full-scale flow rate of the radar level gauge can be selected within the range of 0.5-12m/s to measure the medium flow rate, and the range is relatively wide. The instrument specification (caliber) selected is not necessarily the same as the process pipeline. It should be determined whether the measurement flow range is within the flow rate range, that is, when the flow rate of the pipeline is too low to meet the requirements of the flow meter or when the measurement accuracy cannot be guaranteed at this flow rate, It is necessary to reduce the diameter of the meter to increase the flow velocity in the pipe and obtain satisfactory measurement results.


Share to
RELATED NEWS / News More
  • Number of clicks: 0
    2021 - 06 - 25
    Case application I The anti-corrosion radar level meter DCRD1000A5&DCRD1000C5 was successfully applied to a chemical project in Inner Mongolia Since Acid-base solutions are extremely corrosive in industrial production measurement applications, the wetted materials of equipment must be anti-corrosion materials. Our high-frequency radar level meter DCRD1000A5 and guided wave radar level gauge DCRD1000C5 are special models for corrosive conditions. Radar antennas are made of PTFE with good anti-corrosion performance, which has good sealing performance, strong corrosion resistance and stable measurement results.Any inquiry about the radar level meter, welcome to contact us at any time.
  • Number of clicks: 252
    2021 - 06 - 22
    The  Features of DCRD1000C series of Guided Wave Radar Level meter (GWR)The guided wave radar level meter is an excellent level meter with advanced technology, excellent workmanship and high precision. When the guided wave radar level meter is working, an electromagnetic pulse signal is emitted, which is transmitted to the liquid level and returned at a constant speed through a probe or a steel cable, thereby simply and accurately calculating the liquid level height.Guided wave radar level meter are currently used in a wide variety of tank containers. It is used to measure the liquid level or level of medium such as aqueous medium, acidic medium, alkaline medium, oil medium, and particles.The guided wave radar level meter (DCRD1000C series) independently developed by Xi'an Dechuan...
  • Number of clicks: 1
    2021 - 06 - 18
    Different name or description of continuous level measurements--Radar level transmitter In several areas our products have a different name or description. The name then comes in different interpretations and variations. For example, level gauges, radar level gauges, level transmitter,  level meter, guided wave radar level meter, tank level measurement, non-contact level transmitter, continuous level measurements, water level sensor, level monitoring, radar level device with top-installed, FMCW Radar level sensor, pulse level sensor, and level indicator, radar level measurements. Of course, no matter how the title changes, but our function still doesn’t change, mainly used in the below applications:1) Measurement of liquid level in storage ...
  • Number of clicks: 320
    2021 - 06 - 15
    Air purge+Nuzzle ,  Universal joint:The necessary adjunct when measuring the level of bulk solid in silos bins and tanks.When radar level meter measure the level of solid medium, such as grains, cement powders, solid particles,  the solid material  will form a stockpile or hopper in the silo when feeding  or undloading. Then the antenna of the radar level meter need to perpendicularly alignment to the medium surface,  if the material is uneven,  and the heap angle is large then the universal joint flange is needed to adjust the horn angle to aim the charge level.(Due to the inclination of the solid surface it will cause the problem of  echo decay or even the signal loss.)When measuring the bulk solids, there will bring very heavy dust.  we add an air...
  • Number of clicks: 418
    2021 - 06 - 08
    Application filed of FMCW Radar Level measurements1. FMCW Radar level measurements is especially suitable for the penetration measurement outside the tank or the perspective measurement through the quartz glass isolation flange in the environment of high temperature and high pressure reactor.2. FMCW Radar Level gauge’s electromagnetic wave emission angle is less than 1 degree, suitable for narrow space or guided wave pipeline measurement.3. FMCW Radar level sensor can reach a measuring range of 150meter, which is suitable for the measurement of large storage tanks.4. FMCW Radar Level Meter extremely high measurement accuracy, especially suitable for high-precision measurement level measurement.5. FMCW Radar Level transmitter has a wealth of echo processing algorithms and empirical dat...
Email:sales@dechuang-auto.com
Adress:
Tel:86-29 88606479
Fax: 86-29 88385903
B203, Gazelle Valley, No.69 Jinye Rd, Hi-tech zone, Xi'an, Shaanxi Province, P.R.China. 710077
Copyright ©2018 - 2019 Dechuang Electrical Technology Co., Ltd SITEMAP
Rhino Cloud Provides Enterprise Cloud Services
犀牛云提供云计算服务