How to maintain the whiteness meter and what matters should be paid attention to?

There should be no strong light source and strong magnetic field around (1).

(2) The working environment should be free of corrosive gas and vibration source.

(3) The surrounding air should be dry, and there should be no floating objects such as dust.

(4) How long should the whiteness meter be preheated to improve its stability after being stopped for a long time?

(5) There should be enough heat dissipation space around the whiteness meter to facilitate heat dissipation.

(6) The power supply voltage must meet the working conditions.

(7) Do not drop the sample into the measuring cylinder to avoid zero adjustment.

(8) The power socket must be effectively grounded to avoid external interference.

(9) Don't dirty the clarinet and the work whiteboard, so as not to affect the accuracy.

(10) Do not touch the optical element directly with your hands, so as not to affect the accuracy.