High and low temperature test box operation

1, test equipment
1.1 Wind speed: 0.05m/s wind speed
1.2 Temperature measurement: The required temperature sensor compositional balance required for the use of electromagnetic resistance, thermal insulation or other similar temperature sensor composition: Sensor time constant: 20S~40S; ℃
1.3 Surface temperature measurement: Electromagnetic resistance or other similar sensor composition and required measurement system: sensor time constant: 20S~40S;

2, test conditions
2.1 Proceeding under test-in-air conditions
2.2 When testing the temperature drop rate, the ambient temperature is not high enough to 25℃, and the cooling power temperature is not high enough to 30℃.

3、Temperature test method
3.1 Location and quantity of test points
3.1.1 Preliminary test box work room Contents of the top, middle, and bottom three horizontal test surfaces, brief top, middle, bottom, upper layer, and the distance between the top and the other side of the workshop is advanced 1/10, middle-class workshop Centered on the lower floor, 10 mm above the lower floor product rack.
3.1.2 On the three test surfaces, the center test point was at the center of the workshop, and the distance from the other test points to the wall of the workshop was 1/10 of each person, but the workshop volume was not large enough to be 1 cubic meter. Test box, the distance is less than 50mm
3.1.3 The size of the test room volume is related to the size of the workshop: The workshop capacity is less than 2 cubic meters, and the test points are 9; The workshop capacity is larger than 2 cubic meters, and the test points are 15; With a capacity of 50 cubic meters, the quantity can be increased according to the temperature test.

4, test procedure
4.1 In the test box temperature adjustable range, select high nominal temperature and low nominal temperature
4.2 The procedure of the test box is low temperature and then high temperature.

5, math processing sum test results
5.1 Measured temperature calculation
5.2 Excluded questionable numbers
5.3 Average temperature measured at constant temperature
5.4 Calculation temperature ladder: temperature average reduction large reduction temperature average reduction small
5.5 Calculated temperature wave and temperature deviation
5.6 Trial box control system standard settings and center test results are required to meet deviation requirements.

6、Method of measuring the temperature difference between the work room wall and the work space
6.1 Test point distribution position and quantity
6.1.1 One temperature sensor distributed at any center in the work space, one surface temperature sensor distributed at each center on six inner walls of the work space
6.1.2 In the center of the work room wall with a wire hole or other device, the distance of the hole wall or other device should be less than 100mm
6.2 Test procedure
6.2.1 In the trial box temperature adjustable range, select zui high nominal temperature and zui low nominal temperature as test temperature
6.2.2 The temperature at the center point of the working space * The temperature at the next arrival is measured 2H, every 2 minutes.
6.3 Trial result evaluation
6.3.1 Correction of temperature adjustment table
6.3.2 Separate calculation temperature average value for each test point
6.3.3 Calculate the percentage of the difference between the thermodynamic temperature of the workshop and the workshop.

7. How to test the temperature drop rate
7.1 The test point is the center point of the work space
7.2 Test procedure
7.2.1 In the test box temperature control range, select zui low nominal temperature to zui low nominal temperature, zui high nominal temperature to zui high nominal temperature
7.2.2 Open the cold source, from the test box to the room temperature down to the low preset temperature, set 2H, to the high set temperature, from the test box temperature to the temperature range of 10% to 90% of the time; in the test box Under the high set temperature, set 2 hours, readjust to the low set temperature, test the test box temperature from the temperature range to 90% to 10%.
7.2.3 The heating and cooling process every 1 minute, the temperature is the first.


Post time: Aug-19-2022
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