High-low temperature test chamber standard performance items and technical reference standards

Serial number

Performance items

unit

Specified value

1

Temperature class

℃

30, 40, 55, 70, 85, 100, 125, 155, 175, 200

+5, -5, -10, -25, -40, -55, -65

2

Temperature deviation

℃

± 2

3

Temperature gradient

℃

≤2

4

Temperature fluctuation

℃

≤1.0

5

The difference between the wall temperature of the working room and the temperature of the working space

K

At high temperature level: should not be higher than 3% of the test chamber temperature

At low temperature level: should not be higher than 8% of the test chamber temperature

6

Heating rate 2

℃ / min

≤1, (1 ± 0.2), (3 ± 0.6), (5 ± 1) or the fastest heating or cooling time specified

7

Wind speed b

m / s

≤1.7 or adjustable

a The manufacturer shall specify the fastest heating or cooling time in the product technical documents.

b The manufacturer specifies the wind speed in the product technical file.