Constant temperature and humidity chamber maintenance method and working principle
Introduction of constant temperature and humidity test chamber Constant temperature and humidity test chamber has been widely used in the electronics industry, national defense science and technology, chemical industry, machinery manufacturing, aerospace and other fields. Its production of constant temperature and humidity chamber using the international perfect German design. The working principle of constant temperature and humidity test chamber The constant temperature and humidity test chamber consists of thermostat (warming, cooling) and humidification. Through the rotating fan mounted on the top of the box, the air is discharged into the box to realize gas circulation, and the temperature and humidity inside the box are balanced. The data collected by the built-in temperature and humidity sensor of the box is transmitted to the temperature and humidity controller (micro The information processor) performs an edit process and issues a thermostat/humidity command through the air heating unit, the condenser, and the heating evaporation unit in the water tank. Constant temperature and humidity test chamber temperature adjustment is through the box built-in temperature sensor, data collection, temperature controller (micro information processor) adjustment, connected to the air heating unit to achieve increased temperature or adjust the cooling solenoid valve to reduce the temperature inside the box, To reach the temperature required for control. Constant temperature and humidity box temperature adjustment is through the body built-in temperature sensor, collect data, adjusted by the humidity controller (micro information processor), turn on the water tank heating element, to increase the humidity in the tank or adjust the cooling by evaporating the water in the water tank. Solenoid valve to achieve dehumidification in order to achieve the control of the required humidity. The constant temperature and humidity test chamber is provided with multiple protection measures. The temperature system is equipped with an over-temperature protection device under the condition that the maximum allowable safety temperature can be set. The air heating element can be automatically powered off with the rotation fan stopped. The humidification system can be provided with the humidification tank. When the water level drops, the power supply is stopped, and the cooling system stops working as the temperature of the tank increases (more than 40°C) or the humidity increases.
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So how does the constant temperature and humidity test chamber perform maintenance, cleaning and maintenance in daily work?
1. External cleaning and maintenance of the constant temperature and humidity test box
2 The power distribution room should be cleaned at least once a year or more. When cleaning, vacuum cleaners can be used to remove the indoor dust.
4. Check and maintenance of the humidifier in the constant temperature and humidity test box The storage of water in the humidifier should be replaced once a month to ensure that the water quality is clean. The humidifying water tray should be cleaned once every month to ensure smooth water flow.
5. When the constant temperature and humidity test box is used to check the operation of the over-temperature protector constant temperature and humidity test box, the maximum value of the over-temperature protection is set to 20°C~30°C. When the temperature in the test chamber rises to the set point of the over-temperature protection, the heater power supply is stopped. The "OVERHEAT" over-temperature warning light is on but the fan is still running. If it is operated for a long time and left unattended, it must be checked before operation. Over-temperature protector is set properly [Wet ball over-temperature protector setting is 120°C]. (1) The internal impurities shall be removed before the operation of the constant temperature and humidity test chamber.
3 The exterior of the cabinet must also be cleaned more than once a year. Wipe with soap and water before cleaning.
6. Constant Temperature and Humidity Test Chamber Condenser Dust Removal The condenser shall be maintained on a regular monthly basis, using a vacuum cleaner to suck dust from the condenser heatsink mesh or use high pressure air to remove dust.
7. Change in temperature and humidity test box Wet ball test cloth When the surface of the test cloth is not clean or hard, or after the temperature control is finished, the test cloth must be replaced before continuing the temperature and humidity sphericity control. The test cloth is replaced about three months. When the replacement is performed, the temperature measuring body is wiped with a cleaning cloth. When replacing the new test cloth, it should be cleaned first.
8. Check and adjust the water level of the wet bulb in the constant temperature and humidity test box. Check the water level of the water tank. The water level should not be too high, so that the water overflows the water collection tube or is too low to make the wet ball test cloth absorb water abnormally. The accuracy of wet ball is affected. The water level is about six. It can be full. Adjust the water level of the stagnant water tank to adjust the height of the water tank. 