Analysis of the principle of fault alarm for constant temperature and constant humidity test box

Friday,May 11 2018

1, over temperature alarm in the box: the sensor and channel of the sample area are equipped with overtemperature protection device, and the overtemperature protection device is installed on the operation panel. When the temperature of the test area exceeds the allowed temperature on the panel, the equipment is stopped and the alarm must be stopped. The maximum temperature and height of 10 C must be set by TH to work.

2, sample overtemperature protection: when the temperature of the sample area exceeds the protection temperature set by the controller, the equipment is stopped and the alarm must be stopped. The equipment must be removed and the equipment can run normally after the reset. The upper limit protection and the lower limit protection of the sample over temperature protection can be set arbitrarily according to the needs.

3. Fan overheat alarm: when the fan coil is overheated, the equipment will stop and alarm, and the equipment must be resumed after failure.

4, fan overflow alarm: when the current of the fan exceeds the allowable value, the equipment stops and calls the alarm. The equipment must be allowed to return to normal operation after the overhaul of the overcurrent fault is completed.

5, circulating cooling water water shortage alarm: when the cooling water system water system water pressure is insufficient, the equipment stops and alarm, must be troubleshooting and reset the equipment to return to normal operation.

6, refrigeration compressor overheating alarm: when the compressor coil overheating, line power supply is not normal, equipment shutdown and alarm, must be troubleshooting the equipment to restore normal operation.




7, refrigeration compressor overpressure alarm: when the refrigerant pressure of the refrigeration system exceeds the set value, the equipment is stopped and the alarm must be stopped and the equipment must be reset after manual reset to restore normal operation.




8, power supply phase, phase sequence alarm: when the equipment's external power supply is short of phase, phase sequence changes, equipment shutdown and alarm, must be troubleshooting equipment to restore normal operation.