Clean room engineering test environment: performance test meets environmental requirements;

Temperature: 5~35℃;

Relative humidity: 35%~85%;

Power supply: power supply voltage deviation: ±10% of rated voltage;

Power supply frequency deviation: ±2Hz

Test instrument for purification workshop: it shall be verified by the testing institution on a regular basis and put into use only after the calibration is qualified, and it shall be used within the specified validity period;

The following instruments are required for the test:

a) Hot ball anemometer, measuring error ≤±3% full scale;

b) Particle counter;

c) Illuminometer, measuring range is 0lx ~1000lx;

d) Sound level meter, measuring range should be 40 dB~100dB;

e) Ground resistance tester;

f) Leakage current measuring instrument;

g) Voltage tester, output 50Hz, basic sine wave 1500V voltage, and duration within one minute.