A large number of articles on high and low temperature test chambers are aimed at the safety during use. This article tells you about the safety and environmental protection requirements that the test chamber itself should guarantee in the production process, from the root to protect Low-temperature test box quality and safety measures.
The first part is about the circuit part. The protective ground terminal of the test box should comply with the provisions of Article 7.1.7 of GB 1497. The test box should have over-temperature protection, power failure, water shortage and other protection and alarm devices. Above 75 Db (A).
The second is the transportation environment performance. The high and low temperature test boxes will be sold all over the country and exported to overseas markets, so the transportation conditions must be guaranteed. When the quality of the test box transport package is less than 500 kg, it should be able to withstand sinusoidal vibration (rated) test. During the test, the vibration table frequency is 3 to 4 Hz, the maximum acceleration is 7.35 ± 2.45 m / s2, the vibration duration is selected according to GB 4857.7 Appendix A, the weight of the test box transportation package is less than 500 kg and at least one side is 120 cm Above, it should be able to withstand the drop test stipulated in GB 539, and the performance of the test box after the transportation environment test should meet the requirements of the factory inspection items.
Once again, reliability is mentioned. Manufacturers should provide users with product reliability indicators such as failure rate, mean life (MTTF), mean time between failures (MTTF) or forced shutdown in product specifications or other technical documents. Rate (FOR), etc.
Finally, the warranty period: Under the condition that the user abides by the rules of storage, use and installation, within 12 months from the date of shipment from the manufacturer, if the test box is damaged or does not work normally due to poor manufacturing, the manufacturer should provide free service Repair or replace.
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