LDE-100 electromagnetic flowmeter protection level

Case introduction

LDE-100 electromagnetic flowmeter since its inception, after continuous improvement and refinement, because it has a) simple structure, no moving parts and impede the flow of the measured medium of the disturbing parts or throttling parts. Applicable to a variety of corrosive media measurement. Its measurement is not subject to the density of the fluid, temperature, pressure, viscosity, Reynolds number and in. Only need to use water as the experimental medium for calibration, range ratio, measurement accuracy, no mechanical inertia, reflecting sensitive, can measure the flow of movement and rapid accumulation of total.LDE-100 electromagnetic flowmeter's main structure is composed of two parts: the sensor and the converter. It is based on Faraday's law of electromagnetic induction work, used to measure the conductivity greater than 5μS/cm conductive liquid volume flow, is a measurement of conductive media volume flow of inductive instruments. According to the national standard GB and the Electrotechnical Commission standard IEC529-76 on electrical and electronic products shell protection level of the standard has the following levels: First, IP65: for the water spray type, electromagnetic flowmeter sensor enclosure allows the water head from the electromagnetic flowmeter sensor in any direction on the sensor water spray, water spray pressure in 30Kpa, the water output of 12.5L/S, the distance of 3 metres. The distance is 3 metres. IP67: the electromagnetic flowmeter sensor can be used for a short period of time immersed in water. Third, IP68: for diving type - under a certain pressure is suitable for long-term work in the water or underground, at this time the sensor of the electromagnetic flowmeter and the display part of the separation, to be made into a split electromagnetic flowmeter, but it must be stressed that the electromagnetic flowmeter protection level requirements. Protection level should be selected according to the actual situation, the sensor required to be installed in the ground below, often subject to flooding should be selected IP68, the sensor installed in the ground above should be selected IP65, IP67. general case of one-piece electromagnetic flowmeter protection level of IP65, this special protection is suitable for most of the working conditions of the environment, due to the electromagnetic flowmeter is divided into two parts, the sensor and the signal processor. Part of the electromagnetic flowmeter, therefore, the sensor in the flowmeter occupies a large position, such as if the electromagnetic flowmeter sensor protection level of IP65, then it must meet the following requirements for the installation site: 1. As far as possible to avoid the surrounding environment has a concentration of corrosive gases; 2. Ambient temperature in the range of -25/-10 ~ 50/60 ℃, the temperature of the one-body structure is also subject to electronic components, the range should be narrower; 3. Environmental relative humidity within the range of 10% to 90%; 4. Avoid direct sunlight as far as possible; 5. Avoid rain drenching, will not be flooded; 6. Electromagnetic flowmeter measurement of mixed-phase fluids, select the place that will not cause phase separation; measurement of two-component liquids, to avoid mounting in the downstream of the mixing has not yet been homogeneous; the measurement of the chemical reaction pipeline, to be mounted in the downstream of the reaction to fully complete the section; 7. As far as possible to avoid As far as possible to avoid the measurement of the tube will become negative pressure; 8. Select the place of small vibration, especially for a body-type instrument; 9. Avoid the vicinity of large motors, transformers, etc., in order to cause electromagnetic interference; 10. Easy to achieve a single sensor grounded place.