The necessary safety protection system for the aging test box: over-temperature protection device, which prevents abnormal temperature rise of the test box, resulting in combustion explosion, equipment damage, serious impact on production and a series of major accidents that endanger the safety of employees When the temperature measured when the aging test chamber is running exceeds the setting, the over-temperature indicator flashes, sound and light alarm, and the relay controls the host to stop. How to judge whether the aging test box is over temperature protection caused by normal conditions? The inspection method is as follows:
1. Check whether the AU1 indicator of the over-temperature protector is on. If it is on, it indicates that the temperature in the box exceeds the alarm value. If the over-temperature alarm value is set unreasonably, adjust it down or up;
2. Check whether the solid state relay and temperature sensor of the aging test box are damaged;
3. Check whether the fan is rotating; put the machine in the running state, open the box door, and observe whether the fan is running; if the fan wheel is not visible, and it may be caused by the motor stuck and other reasons, the machine is not rotating, and the temperature in the box is overtemperature;
4. Use a universal meter to measure the resistance at both ends of the motor cable and check whether it is normal;
5. Check whether the aging test box instrument is damaged;
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