Requirements and inspection evaluation methods for the integrity of high and low temperature testing equipment

The SJ/T 31129-94 standard specifies the requirements for the integrity of high and low temperature testing equipment and the methods for inspection and evaluation

Testing for the intact requirements of the main technical indicators of the equipment:
The detection method of temperature error: Within the adjustable temperature range, set several temperature test values in the high temperature zone and low temperature zone respectively. When the equipment reaches the set temperature and stabilizes for 1 hour, use a thermometer to detect it. Afterwards, check every 10 minutes for a total of 3-5 measurements. The error is calculated as the arithmetic mean.
Check the heating and cooling rate: Within the adjustable temperature range, use a timer to measure the time required for heating or cooling at the preset point.