Programmable high and low temperature wet heat alternating test machine five major performance and temperature measurement points
The performance of the programmable high and low temperature wet heat alternating test machine shall be determined under standard atmospheric conditions. When measuring the performance of the test chamber, the surrounding environment may affect the conditions in the test chamber, and the programmable high and low temperature wet heat alternating test machine Measurements should consider the following requirements:
1. The surrounding environmental conditions should basically meet the requirements of GB/T2421.
2. The test chamber should not be exposed to sunlight directly;
3. The test chamber should not be exposed to electromagnetic interference;
4. The programmable high and low temperature wet heat alternating test machine should be placed horizontally;
5. The test chamber should be placed in a place free from mechanical vibration and acoustic vibration.
Note: The test box manufacturer's recommendations for electricity and environmental conditions should be considered; abnormal conditions should be recorded.
Temperature measurement system: The uncertainty of the measurement result of the measurement system is determined by the calibration of the system. Generally, the sensor should be of a resistive type or a thermocouple type. The response time of the sensor in air should be between 10s and 40s. The response time of the entire system should be less than 40s.
Test load for programmable high and low temperature wet heat alternating test machine: All measurements described below are carried out in an unloaded work space and should be recorded if the test chamber is not possible to be completely empty. For the measurement when there is load (heat dissipation or no heat dissipation), it should be recorded. Whether the sample under test in the box has heat generation, weight, quantity, placement density and arrangement order all have influence.
Installation of temperature sensor: The temperature measuring sensor is located at each corner of the test chamber and the center of the working space (at least 9 sensors). For programmable high and low temperature wet heat alternating test machines above 2000L, it should be placed directly in front of the center of each box wall. The sensor (at least 15 sensors), the placement of the measurement system should not affect the temperature distribution of the no-load test chamber, and should be able to record the actual temperature reached.
Measurement of temperature performance: After the test chamber is stabilized, the actual temperature, temperature fluctuation and temperature gradient of the workspace are confirmed according to the measurement results of the measurement system, and the uncertainty of the temperature measurement system should be considered.
Shanghai Huanzheng Test Equipment Factory is specialized in producing non-standard products such as high and low temperature alternating current testing machine for high and low temperature wet heat alternating test machine, and has many years of production experience. Professional production environment testing equipment.
Shanghai Huanzheng Test Equipment Factory hopes to cooperate with new and old customers around the world to achieve win-win!
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