YD/T 1539-2006 Mobile communication handset reliability technical requirements and test methods explain the function of the mobile communication handset after being subjected to a temperature shock test of (30 ± 3) ° C / ( -25 ± 3) ° C in the off state , appearance and assembly should meet the requirements of relevant standards. The specific test method is: First, the test method is carried out in accordance with the relevant provisions of GB/T 2423.22. Second, the temperature-time curve of the test is shown in the figure below. 3. Condition test: Set the low temperature box in the temperature shock test chamber to (-25±3) °C, and set the high temperature box to (30±3) °C. The test sample is loaded with the matching battery, not packaged, not placed in the low temperature box, and then kept at the specified storage temperature for 30 minutes, then the test sample is moved to the high temperature box and kept at the specified storage temperature for 30 minutes, then The test sample is then moved to the cryostat for the next cycle. This is cycled 5 times. 4. After the condition test is completed, the function, appearance and assembly test are performed. Sun Kee Envelopes Limited , https://www.sunkeeenvelope.com
October 14, 2022