Test procedure for temperature and pressure change rate of high and low temperature low pressure test chamber


High-low temperature and low pressure test chamber comprehensive test The average temperature change rate and air pressure change rate test procedure every 5 minutes:
1. Adjust the air pressure controller and temperature controller of the test equipment to the required nominal pressure value and temperature nominal value respectively.
2. The device is cooled or warmed according to the required rate of change. When the temperature measurement point reaches the required temperature, the device is depressurized. When the barometric pressure measurement point reaches the required air pressure value, the air release valve is opened to boost the device to the specified air pressure value. .

3. During the cooling and warming process of the high and low temperature low pressure test chamber, the temperature of the measuring point of the equipment is measured every 1 min; during the step of reducing and boosting the equipment, the time t1 of the device from the specified air pressure to the nominal air pressure is recorded separately. The time t2 from the nominal air pressure to the specified air pressure.


MSD Size Doll

Msd Size Doll,Ball Jointed Porcelain Dolls,Angel Of Dream Bjd,Doll Wax Salon

Changchun Huadu Network Service Co., Ltd , https://www.legenddollbjd.com

Posted on