The technical requirements formulated in the high temperature test chamber standard (previous section)
The technical requirements formulated in the high temperature test chamber standard are divided into 6 small points. In this section, we first understand two of the more important points: product performance and product structure and appearance requirements. As we all know, our purchase of goods is nothing more than two major prices It is the same with quality and testing instruments. Regarding product performance, the standard mentions that the temperature grade and allowable deviation of the test chamber is ± 2 ℃, for example: temperature grade setting 30, 40, 55, 70, 85, 100, 155 , 175, 200 The deviation of any point must be within the allowable range (Note: when the temperature is higher than 200 degrees, the allowable deviation of the temperature level is ± 3 ℃), if it exceeds the allowable range, it is a non-conforming product, the temperature is uniform The degree should not be greater than 2.0 degrees,
Then look at the product structure and appearance requirements: the technical requirements formulated in the high temperature test chamber standard (previous section)
1. First, the inner wall should be made of materials that are resistant to heat and oxidation and have certain mechanical properties;
2. The insulation material should be able to withstand high temperature and have self-extinguishing performance;
3. The thickness of the thermal insulation layer should make the temperature of the accessible parts outside the test box not higher than 50 ℃;
4. The heating device shall not constitute direct radiation to the test sample;
5. Observation windows shall be provided, and lighting devices shall be provided in the working room;
6. There should be a lead hole for introducing the test power into the working room;
7. The sealing strip of the door of the high temperature test box should not be easy to aging, sticky, deform, lose the sealing performance under high temperature conditions, and should be easy to replace;
8. There should be a sample rack for placing or hanging samples. The sample rack should have a certain mechanical strength under high temperature conditions and be easy to load and unload;
9. There should be instruments or devices for temperature adjustment, indication, recording, etc .;
10. The appearance of the coating layer should be flat and smooth, the color tone is uniform, and there should be no exposed bottom, blistering, super layer or scratch marks.
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