When maintaining the instrument, when to clean and how to clean the dust-proof net are issues we are more concerned about.

In fact, if the instrument is used in a dust-free environment, it can be cleaned once every six months; if it is normal, it can be cleaned once every three months; if it is dusty, it can be cleaned once a month. The specific cleaning time can be determined according to the amount of dust on the through hole of the dust-proof net.

The specific cleaning steps are as follows:

1. Remove the dust cover:

Use a Phillips screwdriver to loosen and remove the five screws on the dust cover on the left and right sides of the instrument, as shown in the figure below:

2. Deashing:
a. After removing the screws, use tweezers to remove the dust cover, and at the same time take out the dust net inside, as shown below:

b. Use tweezers to clamp the dust-proof net to the edge of the trash can and shake to make the dust stuck to the dust-proof net fall off. If you have a high-pressure air gun, you can use the high-pressure air gun to aim at the dust screen to blow the dust on the dust screen. Or put the dust-proof net under the faucet and wash it down, and dry the dust-proof net after rinsing it.
c. Rinse the dust cover under the faucet. If the stubbornness cannot be washed off, you can use a brush. After rinsing, let the dust cover dry.

3. Install dust cover:
a. Install the cleaned dust screen back into the ventilation window of the instrument, and then close the dust cover.

b. Use a Phillips screwdriver to fix the screws back to the dust cover.

In the cleaning process, it is necessary to pay attention to:

1. When disassembling and cleaning the dust-proof net, be careful not to tear the dust-proof net.
2. If the dust screen and dust cover are rinsed with water, they must be dried before reinstalling the instrument.

3. If the dust screen is torn and damaged accidentally during the cleaning process, a new one must be replaced.
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