Use of dust sampler for hazy weather

The hazy weather has caused a large area of ​​low visibility in the city. When the relative humidity in the morning or at night is relatively high, the fog is formed; when the temperature rises during the day and the humidity decreases, it gradually turns into helium. This phenomenon has both meteorological and pollution causes. Since January 9, 2013, the central and eastern regions of the country have been caught in severe haze and pollution. The Central Meteorological Observatory has upgraded the blue warning of heavy fog to yellow warning. At 10:00 on the 13th, Beijing even released the first orange in the history of Beijing's meteorology. Early warning. From the northeast to the northwest, from North China to the Middle, leading to Huanghuai and Jiangnan areas, there has been a wide range of severe and serious pollution.

There are several reasons for the formation of haze weather. 1. The main factors are low atmospheric air pressure and no air flow. As the air does not flow, tiny particles in the air gather and float in the air. 2. The ground is dusty, the air is low in humidity, and people and traffic on the ground stir the dust. 3. Automobile exhaust is the main pollutant discharge. In recent years, there are more and more automobiles in the city, and the emission of automobile exhaust is a factor of smog. 4. Secondary pollution produced by the factory. 5. Carbon dioxide and other pollutants emitted during winter heating are summarized as the accumulation of dust particles in the air. When it comes to this one, I have to mention the dust sampler.

Dust sampler adopts the latest microcomputer chip control technology, built-in high-energy cadmium-nickel rechargeable battery, long continuous operation time, easy operation, high timing accuracy, sturdiness and durability, AC and DC compatible, convenient time-saving, countdown from 1 to 959 minutes, any choice, Automatic shutdown of the power supply when shutting down is an ideal and practical filter dust-collecting type dust sampler in the same type of domestic instruments.

Dust sampler use and maintenance dust sampler sampling:

Install the sampling head with filter membrane, press the microcomputer ON/OFF button, the display shows “0:00”, then press MIN (minute) to select the desired time, the maximum time of this key is 59 minutes, if 59 If there are not enough points, press the HOUR key again. The maximum time for this key is 15 hours. When the time is selected, press the ON/OFF key to start sampling. The computer enters the countdown status while the sampling pump is working. When the computer display shows “0:00”, the host computer is automatically shut off by the computer program. After 1 minute, the “0:00” character in the display will disappear, and the power in the computer will also disappear. Cut it off. If you want to reset or shut down in advance, just press and hold the ON/OFF button for 2 seconds to enter reset or power off. The display will show “0:00”.

Dust sampler charging:

Plug the AC power cord into the 220V AC input of the instrument and the mains. The instrument is in the off state. It takes about 14 to 16 hours (standard charging time) for a full charge. Each time sufficient electricity can work continuously or cumulative work for about 4 hours. The battery voltage at the time of sampling indicated by the voltmeter at the time of sampling, and the battery voltage at the charge indicated at the time of charging. The full electric voltmeter indicates about 12V.

The main issues: the instrument can not be used in the occasion of explosion-proof. Keep it in a dry and ventilated place for a long time. If not more than 3 months should be added to ensure that the life of high-energy nickel-cadmium batteries.

In the dusty air, the sampling head with filter membrane should be installed before starting the machine. Otherwise, the dust particles enter the machine and affect the operation of the air pump and the cleaning of the air circuit.

During handling and carrying, the instrument should prevent other things from touching the 3 buttons of the microcomputer to prevent malfunctioning.

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