The following definitions of terms apply to the GB / T 10590-2006 low-pressure test chamber standard.

The test chamber is closed and the box or space, and a part of it can meet the specified test conditions.

Temperature setpoint (temperature setpoint) is the desired temperature set by the test box control device.

After the actual temperature (achieved temperature) is stable, the temperature at any point in the working chamber of the test chamber.

Temperature stabilization (temperature stabilization) The temperature of all points in the working room has reached the temperature setting value and maintained within the given tolerance range.

After the temperature fluctuation is stabilized, within any given time interval, the difference between the highest and lowest temperature at any point in the working room.

A part of the working space (working space) that can maintain the specified conditions within the specified tolerance.

After the temperature gradient is stabilized, the maximum value of the difference between the average temperatures of any two points in the working space within any time interval.

The rate of change of temperature (temperature rate of change) between two given temperatures measured in the center of the working space of the low-pressure test chamber, in ℃ / min.

After the temperature variation in space of the working space is stable, the difference between the average temperature of the center of the working space of the low-pressure test chamber and the average temperature of other points in the working room within any time interval.

After the temperature extremes are stabilized, the highest and lowest measured temperatures reached in the working room.

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