The test conditions described in the previous section need to be carried out under full load conditions, which can more realistically reproduce the natural and real working conditions.
The constant temperature and humidity test chamber is heated according to the requirements of the test standards. The temperature value of the center point is measured every 5 minutes during the temperature rise period. After the temperature rise period is measured, after the temperature and humidity at the center point of the working space reach the specified value for the first time and stabilize for 2 h, all the temperature and humidity values ​​are tested every 2 minutes. Measure 15 times within 30 minutes, and test again every 30 minutes. Afterwards, test once every 1h. The test chamber of type â… test box is 24h, and the test period of type â…¡ test box is over.
Allow the test chamber to cool down in accordance with the requirements specified in Figure 2 of GB 2423.4. During the cooling period, the temperature and humidity values ​​of the center point are tested every 5 minutes, and the end of the cooling period is measured. After the temperature and humidity values ​​of the center point of the working space reach the specified value for the first time and stabilize for 2 h, all the tests are performed every 2 minutes Test the temperature and humidity value once. A total of 15 measurements were made within 30 minutes, and then again every 30 minutes, and then every 1 hour, and the end of the low temperature and high humidity period was measured.
Calculation and evaluation of test results of constant temperature and humidity test
Correct the measured temperature and humidity values ​​according to the correction value of the test instrument, and use the test data of 15 times within 30 min to find the difference between the highest and the lowest temperature in each test data, and then find the average value, which is the temperature uniformity Degree, using 15 test data within 30 minutes of the center point, find the half of the difference between the highest and the lowest temperature, and use the "±" sign as the temperature fluctuation at that temperature, using the temperature measured at a constant stage Data, calculate the difference between the highest temperature, the lowest temperature and the nominal temperature, which is the temperature deviation. The measured relative humidity value should be within the range specified by the standard. The data of the temperature and humidity measured during the heating and cooling stages will be plotted. The heating and cooling curves are formed. The above calculation results and curves should meet the requirements of Table 1. Compare the temperature and humidity value indicated by the indicator of the constant temperature and humidity test box with the test value of the center point to find the correction value to facilitate the indication value. To be corrected.
Standard temperature and humidity test method of constant temperature and humidity test chamber (next section)
The Log Holder is a storage building that has two variants, they both store logs and provides a convenient as well as secure place store any extra logs for future projects or repairs. Log holder can be placed on almost all surfaces, including small rafts, large rafts, house boats. With the open design, log holder can provide excellent ventilation for your wood, the heavy duty log holder also will provide the perfect side for your fresh cut wood to shelter. Do not hesitate to contact us any questions about log holders.
Log Holder
Firewood Rack,Fireplace Log Holder,Fireplace Wood Holder,Log Holder
Dongguan Jiangxin Metal Products Co., Ltd , https://www.jiangxinbbq.com