Oct 27 , 2021
Explanation of inspection methods of the high and low-temperature test chamber
High and low-temperature test chamber detection method
Natural environment standard (environmental conditions): The surrounding physics, organic chemistry, and microbiological standards that the commodity bears;
Environmental monitoring system (environmental parameters): Indicate one or more of the main parameters of physics, organic chemistry, and microbiology in natural environmental standards;
Comprehensive experimental equipment (combined testing equipment): a high and low-temperature test box that can additionally simulate two or more environmental monitoring system experiments;
Composition of experimental equipment (composite testing equipment): equipment that can continuously simulate two or more environmental monitoring system experiments in succession;
Tolerance value (nominal value): When testing natural environment experimental equipment, the required natural environment variable value or the natural environment variable value that must be determined in advance shall be specified according to the experimental method;
Special load (specified load): use experimental equipment to carry out natural environment test samples;
Simulation load (simulation load): the load manufactured by experimental standards (note: factors such as quality, geometrical specifications, total windward area, and thermal conductivity should be considered);
How to solve the abnormal environmental humidity in the constant temperature and humidity testing machine?
The first step is to check whether there is ice in the upper water storage tank. If there is no water, then check whether there is ice in the lower water storage tank. If there is no water in the sewer pipe tank, you must drain the water in the lower water storage tank for disposal. If there is no water in the upper storage tank and ice in the lower storage tank, the pumping motor of the lower storage tank is damaged, and the manufacturer must be notified immediately for on-site service to carry out maintenance.
The second step is to check whether the under-water and overheating protection device of the main engine room is set at 150°C; if not, the under-water and overheating protection device must be turned to 150°C;
The third step is to check whether the intermediate relay of the environmental humidity part is short-circuited or damaged: if the electric heater is not damaged, the AC gear of the three-purpose watt-hour meter should be used, and the working voltage gear should be opened to 600V, and the red and black Put the rods on both sides of the intermediate relay whose wire number is marked H to communicate with each other, and then set the environmental humidity preset value of the environmental humidity part to 0%. At this time, the indicator light of the intermediate relay in the environmental humidity part is not easy to flicker If the measured working voltage value does not change, staying below 10V means that the intermediate relay is damaged, indicating a short-circuit fault condition. Or first set the preset value of the environmental humidity to 0%, and then check whether the humidifying bucket in the host room is boiling.
The fourth step, if no common faults are found in the above three items, finally check whether the pipes in the main engine room are too dirty, which will cause the flow of water to be blocked; if this happens, the main switch power supply should be turned on after the machinery and equipment, and then Open the water drain valve directly below the humidification bucket until it reaches the position parallel to the pipe. After the water in the upper storage tank is drained, open the humidification bucket according to the wrench to remove the internal dirt and clean it, and then pull out the silicone hose. After the maintenance is completed, follow the disassembly method and reinstall it in reverse. After the equipment is completed, the water drain valve directly under the humidification barrel must be turned off to the vertical position with the pipeline, and then the machine equipment After that, the power switch is turned on.
Regulations and identification methods for sharing intact and non-destructive temperature-controlled environmental test chambers
- Key performance parameters:
1. Temperature range: 40℃~200℃
2. Temperature uniformity: <><>
3. Temperature fluctuation: <><>
4. Temperature gain value: indoor temperature ~200℃ within 50 minutes.
5. Capacity of environmental test chamber: 216L
- Computer operating system regulations:
1. A practical operation button is easy to start, accurate positioning and reliable, and complete signs.
2. Everything is normal when the indicator lights of each instrument are working. Braking system limit switch equipment is complete, dexterous, and reliable. All kinds of power switches are handy and reliable.
- Mechanical structure regulations:
The mixing and cooling fan transmit the wind evenly, without vibration and noise, and everything is normal during work.