How the dust particle counter detects dust particles in a dust-free cleanroom

How the Dust Particle Counter detects dust particles in a dust-free cleanroom The dust particle counter is an instrument
used to measure the number and particle size distribution of dust particles in a clean environment.

When using, first determine the number of test points according to the area of the clean room and distribute the test points evenly in the clean room, then set the measurement time, measurement, flow rate and other parameters of the particle counter, and then place the particle counter on the plane at a height of 1 to 1.
2 meters above the ground in the middle of the sampling point, and then start to test the sampling and record the data
one by one.

According to the provisions of the "Clean Plant Design Code", when the cleanliness test of the purification workshop is conducted, the detection point should be within the water level of 1.
00m from the indoor floor; For the total number of measuring points in the one-way flow purification workshop, the total number of measuring points should not be less than 20 points, and the spacing between the measuring points is 0.
5-2.
0m
.

The horizontal unidirectional flow measurement point is only arranged in the work area of the di-one purification workshop; The non-unidirectional flow purification workshop arranges 5 measurement points
according to the purification workshop area less than or equal to 50m2.

In the actual operation of the dust particle counter, you also need to pay attention to the following points: 1, when the inlet pipe is covered or blocked, do not start the counter; 2.
The laser dust particle counter should be used in a clean environment to prevent damage to the laser sensor; 3, there is no high-pressure decompression equipment (such as high-pressure diffuser) do not sample compressed air, all particle counters are designed to operate
at one atmospheric pressure.

4.
Do not measure the mixture of gases (such as hydrogen and oxygen)
that may produce reactions.

At this time, the gas may also explode
inside the counter.

To measure these gases, you need to contact the manufacturer for more information
.

5.
Water, solution or other liquid can not enter the sensor
from the inlet tube.

6.
When sampling, it is necessary to isolate the sampling of gases discharged from the counter itself or polluted by the gas from the counter
.

7.
When connecting an external printer or connecting an external temperature and humidity sensor, you need to turn off the counter first; When performing a print operation, there must be printing paper on the printer, otherwise the print head
will be damaged.

Dust particle counter is mainly used to test the clean environment of the purification workshop, when the place of measurement has loose particle material, dust source, spray place, must be kept at least twelve inches away
from the inlet tube.

To avoid the above particles and liquids from contaminating the sensor and pipeline
.