Calculation and evaluation of the experimental results of the test chamber and humidity test methods
1. Correct the measured temperature value according to the correction value of the test instrument;
2. Calculate the arithmetic average of the temperature of each test point separately;
3. Substitute the temperature of the working room wall and working space into the formula (1):
-The percentage of the difference between the thermodynamic temperature of the inner wall of the working chamber and the working room;
—The average temperature of the test point on the wall of the working room ℃;
—The average temperature of the test point of the geometric center of the working space ℃;
The result shall meet the requirements of 4.1.4 of this standard.
Heating and cooling rate test methods: a. The test box is carried out under full load; b. The test point is a few central points in the work space. Within the adjustable temperature range of the test chamber, the highest nominal temperature is selected as the highest heating temperature, and the heat source is turned on to increase the test chamber from room temperature to the highest heating temperature. After stabilizing for 2 hours, the temperature is lowered to room temperature. Record once every 5 minutes until the end of the test process.
Correct the measured temperature value according to the correction value of the test instrument; calculate the average rate of heating and cooling according to formula (2):
— Average temperature change rate ℃ / min;
-The difference between two adjacent test temperatures ℃;
— Min time interval between two adjacent tests;
The result should meet the requirements of 4.1.7 of this standard;
Humidity test method: a. The test is conducted under wearing conditions; b. The test point is the geometric center of the work space; c. The test temperature is 35 ° C.
Test procedure: After the temperature at the test point reaches the test temperature and stabilizes for 2 hours, the temperature values ​​of the dry and wet bulbs are tested every 2 minutes for 5 times.
Calculation and evaluation of test results: a. Correct the measured dry and wet bulb temperature value according to the correction value of the test instrument; b. Find out the relative humidity under the wind speed at the test point according to the relative humidity lookup table The average value shall meet the requirements of 4.1.5 of this standard.
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