3-step analysis of impact tester fault

Impact testing machineFaults are often encountered during the test, so how to better eliminate them? Professional answers and analysis of the technical department of Jinan Hengsi Shanda Instrument Co., Ltd.:

1. In high-temperature tests, if the temperature change does not reach the test temperature value, you can check the electrical system and troubleshoot the fault one by one. If the temperature rises very slowly, check the air circulation system to see if the air circulation adjustment baffle is turned on normally. Otherwise, check whether the air circulation motor is running normally. If the temperature overshoot is severe, then the setting parameters of the PID need to be adjusted. If the temperature rises directly and is protected by overtemperature, if the controller fails, the control instrument must be replaced.

2. If the low temperature does not meet the test indicators, you have to observe the temperature change. Is the impact tester slow down or the temperature tends to rebound after the temperature reaches a certain value? The former must check whether the studio is dried before performing a low temperature test, so that the studio is kept dry and then put the test sample into the studio before performing the test. Whether the test samples in the studio are placed too much so that the air in the studio cannot be fully circulated. After eliminating the above reasons, you must consider whether it is a fault in the refrigeration system, so that professionals from the manufacturer must be asked to conduct inspections. The latter phenomenon is caused by the poor use environment of the equipment. The ambient temperature of the equipment and the position of the equipment (the distance between the back of the box and the wall) must meet the requirements (there are specified in the equipment operation instructions).

3. In the humid and heat test, the actual humidity will reach 100% or the actual humidity will be very different from the target humidity, and the value is much lower. The former phenomenon: it may be caused by the dry gauze on the wet bulb sensor. Then check whether the water in the wet bulb sensor is lacking in water. The water level in the water level controller is automatically controlled by a water level controller to check whether the water level controller water supply system is normal and whether the water level controller is working normally. Another possibility is that the wet-ball gauze will harden due to the long use time or the purity of the water supply, making the gauze hard, making it unable to absorb water and dry. As long as the gauze is replaced or cleaned, the above phenomena can be eliminated. The latter phenomenon is mainly because the humidification system is not working. Check the water supply system of the humidification system, whether there is a certain amount of water in the water supply system, control whether the water level control of the humidification boiler is normal, and whether the water level in the humidification boiler is normal. If all the above is normal, then you need to check the electrical control system, and you need to ask professional maintenance personnel to perform maintenance.

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