1. Reproducibility of environmental conditions Environmental test equipment such as constant temperature and humidity chambers may be used for multiple tests of the same type of products, and one engineered product may also be tested in different environmental test equipment, such as ultraviolet aging. In order to ensure the comparability of the test results obtained by the test machine under the environmental test conditions specified in the same test specification, the environmental conditions provided by the environmental test equipment must be reproducible. That is to say, the stress level (such as thermal stress, vibration stress, electrical stress, etc.) applied to the product to be tested by the ultraviolet aging tester environmental test equipment is consistent with the requirements of the same test specification.
The repeatability of the environmental conditions provided by the environmental test equipment is guaranteed by the national metrological verification department after passing the verification according to the verification procedures formulated by the national technical supervision agency. To this end, the UV aging test machine must require the environmental test equipment to meet the requirements of various technical indicators and accuracy indicators in the verification procedures, and the use time does not exceed the time limit specified in the verification cycle. If a very common electric vibration table is used, in addition to satisfying the technical indexes such as excitation force, frequency range and load capacity, the ultraviolet aging test machine must also meet the lateral vibration ratio, mesa acceleration uniformity, harmonic distortion, etc. specified in the verification regulations. The requirements of the accuracy index, and the use period after each verification is two years, more than two years must be re-qualified before they can be put into use.
2. Reproducibility of environmental conditions It is an elusive thing to completely and accurately reproduce the environmental conditions existing in nature in the laboratory. Ultraviolet light weatherproof test chamber However, within a certain tolerance range, people can correctly and similarly simulate the external environmental conditions experienced by engineering products during use, storage and transportation. This paragraph is summarized in the language of the project, that is, "the environmental conditions (including the platform environment) around the test equipment created by the test equipment should meet the environmental conditions and tolerances specified in the product test specifications." .
3. Exclusion of environmental test conditions Each time an environmental or reliability test is carried out, the UV aging test machine has strict regulations on the types, magnitudes and tolerances of environmental factors, and excludes environmental factors required for non-test penetration. In order to determine and analyze the product failure and failure mode during the test or after the test, provide the exact basis. The ultraviolet aging test machine requires the environmental test equipment not to attach other materials to the test product except the specified environmental conditions. Environmental stress interference.
4. Safety and reliability of test equipment Environmental test, especially reliability test, long test period, the test object is sometimes a military product with high value. During the test of the Xenon lamp weatherproof test chamber, the test personnel often have to operate around the site. Inspection or testing work, therefore requires environmental testing equipment must have the characteristics of safe operation, convenient operation, reliable use, long working life, etc. The Xenon lamp weatherproof test box ensures the normal operation of the test itself. The various protection, warning measures and safety interlocking devices of the test equipment should be perfect and reliable to ensure the safety and reliability of the test personnel, the tested products and the test equipment itself.
5. Measureability of environmental condition parameters The environmental conditions provided by any environmental test equipment must be observable and controllable. The UV aging test chamber is not only to limit the environmental parameters to a certain tolerance range. In addition, the requirements for the reproducibility and repeatability of the test conditions are guaranteed, and it is also necessary to proceed from the safety of the product test. The ultraviolet aging test chamber is used to prevent the environmental damage of the test product from being damaged and causing unnecessary loss. At present, the accuracy of the parameter test generally required in various test specifications should not be less than one third of the error allowed by the test conditions.
Laser Distance Meter 50M
This 50m distance measuring meter is made of two parts: the laser distance outside unit and the sole part laser measure module. Great distance range is from 3cm to 50 meters with ±1.5mm high accuracy. Digital distance measuring device is quick and reliable measure with one hand pushing the button. It is designed for hand helding, very convenient to put in your jacket pocket or trouser pocket.
1>. Easy to Use. It is very easy to learn how to use a Laser Distance Meter, it can measure distance with pressing a single button.
2>. Safety. Using a laser distance meter to measure is much safer than using a measure tape, for users do not need to climb up and down.
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