Failure analysis and solution in the test process of constant temperature and humidity tester - Database & Sql Blog Articles

Heng Jiaxing AO3401

Test probe P100-B can be customized for other specifications

Kaixin micro test

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First, constant temperature and humidity testing machine summary:
The constant temperature and humidity test machine can simulate various temperature and humidity environments, and is suitable for testing electronic, electrical appliances, food, automobiles, rubber, plastic glue, metal and other products, meeting the reliability of GB/T2423, GJB150A1/4 in various harsh environments. Parameters such as performance will give you the basis for predicting and improving product quality and reliability. Widely used in industrial electronics, military, plastics, hardware, chemical and other industries, such as: electronic parts, automotive parts, notebooks and other products virtual climate environment testing.
Second, the basic introduction of constant temperature and humidity testing machine:
Constant temperature and humidity testing machine adopts high stability platinum PT-100 temperature measuring body, LCD Chinese and English touch/touch screen, with multiple sets of PID control functions, equipped with RS-232C/485C with computer interface control, can simulate High temperature, high humidity, high temperature, low humidity, low temperature, high humidity, high temperature, low temperature and other environmental conditions. It is equipped with high-accuracy programming and easy-to-operate and easy-to-operate programming and fixed-point control switches to provide the best test performance.
Third, constant temperature and humidity testing machine product features:
1. The constant temperature and humidity tester adopts circular arc shape and matte line treatment, high-quality appearance, and adopts flat no reaction handle, which is easy to operate, safe and reliable;
2. Fully enclosed structure, using a powerful circulation motor, low-pitched cryostat;
3. It is equipped with anti-vibration table mats to keep the machine quiet and stable during operation;
4. With the test piece power-on test function (load test);
5. It adopts Philips lighting window light and built-in high temperature demisting device to facilitate observation of product test conditions in the box;
6. With a variety of protection devices, the performance is safe and reliable.
4. Fault analysis and solution in the test process of constant temperature and humidity tester:
In the high temperature test, if the temperature change does not reach the test temperature value, the electrical switch can be inspected to eliminate the fault one by one. If the temperature rises very slowly, it is necessary to check the air circulation switcher to see if the regulating flap of the air circulation is turned on normally. Otherwise, check whether the motor of the wind circulation is running normally. If the temperature is too high, you need to set the PID setting parameters. If the temperature rises directly and the temperature is over-protected, then the manipulator fails and the instrument must be replaced.
If the low temperature does not reach the test index, then you should observe the temperature change, whether the temperature drop is very slow, or the temperature has a rising trend after the temperature reaches a certain value. The former should check whether the studio will be used before the low temperature test. Drying, leaving the studio dry and then putting the test sample into the working room for testing. If the test sample in the working room is placed too much, the wind in the working chamber cannot be fully circulated. After eliminating the above reasons, it is necessary to consider Whether it is a fault in the refrigeration switcher, so please consult the professional of the manufacturer. The latter phenomenon is caused by the poor use of the equipment. The ambient temperature at which the equipment is placed and the location where it is placed (the distance between the rear of the cabinet and the wall) must meet the requirements (as specified in the operating instructions for the equipment).
In the damp heat test, the actual humidity will reach 100% or the actual humidity will be very different from the target humidity. The value is much lower. The former phenomenon may be caused by the drying of the gauze on the wet bulb sensor. Then check the wet bulb sensor. Whether there is water shortage in the water tank, the water level in the water tank is automatically controlled by a water level controller, check whether the water supply controller water supply is normal, and the water level controller works normally. Another possibility is that the wet gauze is hardened due to the long use time or the purity of the water supply, so that the gauze becomes hard and the gauze can not absorb moisture and is dry. The above phenomenon can be eliminated by replacing or cleaning the gauze. The latter phenomenon is mainly because the humidifying switch does not work. Check the water supply switcher of the humidifying switcher. Is there a certain amount of water in the water supply switcher? Is the water level control of the humidifying boiler water level normal? The water level in the humidifying boiler is normal. If everything above is normal, then check the electrical control switch, which should be repaired by professional maintenance personnel.
When the equipment suddenly fails during the test operation, the corresponding fault display prompt appears on the control instrument and there is an audible alarm prompt. The operator can quickly check which type of fault is involved in the troubleshooting chapter of the operation of the equipment, and then ask the professional to quickly eliminate the fault to ensure the normal operation of the test. Other environmental testing equipment will have other phenomena in use, and it will be specific phenomena, specific analysis and elimination.

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