The walk-in drug test box is one of the multi-functional and relatively expensive equipment in the environmental test equipment. Although the drug test box is thought to be meticulous, it is difficult to guarantee that there will be no mistakes in the test application process. Because of the failure of the drug test box, there are other factors in the room besides its own quality problems, such as operational problems or placement environment. Let me tell you how to deal with some simple problems in the walk-in drug stability laboratory.

　　When an error is found in the walk-in stability test chamber, the cause of the error should be identified first. When there is a problem in the system, the system software will automatically present the problem on the control instrument, and the customer can handle things according to the prompts of the control instrument. There are some problems that cannot be solved by the user or the automatic control system can diagnose the problem clinically by itself. At this time, everyone will It is necessary to find professional guidance from the manufacturer of the transaction or on-site service to solve it.

　　In addition to the failures and corresponding treatment methods that the automatic control system will prompt for the drug testing box, there are also many troubleshooting methods for constant temperature and humidity test bags in the instruction manual. You can judge according to the above specific content. But one thing must be paid attention to, that is, the power supply of the machine must be disconnected before the inspection to avoid accidents.

　　Place the walk-in chemical test chamber in a vacuum desiccator to extract time for the gas to remove the gas that can be removed from the material. If the product workpiece is heated first, the vapor will condense as it heats. Because the vacuum chamber has very good sealing characteristics, the huge pressure generated by the trapped gas will also cause the tempered laminated glass of the inspection window to explode. This is an insidious risk that can be avoided by first vacuum packaging and then heating for manipulation. Put the items to be dried into the drying box, close the door, turn off the automatic exhaust valve, open the vacuum valve, turn on the mechanical pump, turn on the air pump, make the vacuum pump enter the small box to reach -0.1MPa, and turn off the vacuum valve . Then turn off the mechanical pump switching power supply.

　　In the walk-in drug test box , turn the main power switch of the industrial oven to the open position, select the required setting temperature, and the temperature in the box will gradually increase. When the temperature in the box is close to the set temperature, the heating display light will flicker and go out. , Repeated several times, generally can enter the temperature control state within 120min. When the required working temperature is relatively low, you can use the secondary setting method. For example, the standard temperature is 60°C, and the first time can be set to 50°C. The temperature is gradually reduced, and the second time is set to 60°C. This can reduce or even eliminate the temperature overcharge situation and quickly enter the temperature control state.

　　If the chemical test box heats the air sequentially in the process of heating and vacuum packaging, the heat will be carried to the mechanical pump, which may cause the mechanical pump to rise too high and reduce the operating frequency of the mechanical pump. Heated gas is introduced into the gauge and a temperature rise is created across the gauge. If the temperature rises beyond the operating temperature range of the vacuum gauge, a vacuum gauge indication deviation may occur. The precise construction process should be vacuum-packed and then heated. This is useful if you find that the vacuum has dropped after meeting the additional temperature.