GB/T 2423.63-2019Environmental testing—Part 2:Test methods—Test: combined temperature(cold and heat)/low air pressure/vibration (mixed mode) (English PDF)

Foreword

GB/T 2423 "Environmental testing - Part 2: Test methods" is divided into several parts according to the test methods.

This Part is Part 63 of GB/T 2423.

This Part is drafted in accordance with the rules given in GB/T 1.1-2009.

1 Scope

This Part of GB/T 2423 specifies the basic requirements, severities, test procedure and other technical details for the combined test of temperature (cold and heat)/low air pressure/vibration (mixed mode).

2 Normative references

The following documents are indispensable for the application of this document.

For the dated references, only the editions with the dates indicated are applicable to this document. For the undated references, the latest edition (including all the amendments) are applicable to this document.

3 Terms and definitions

Terms and definitions defined in GB/T 2422, GB/T 2423.1, GB/T 2423.2, GB/T 2423.10, GB/T 2423.21, GB/T 2423.22, GB/T 2423.26, GB/T 2423.43, GB/T 2423.58 and GB/T 2424.26 are applicable to this document.

4 General description

This test is a combined test of test A. cold, test B. dry heat, test M. low air pressure, test N. change of temperature, and test Fi. vibration (mixed mode).

5 Test apparatus

The test apparatus shall comply with the requirements for test apparatus in GB/T 2423.1, GB/T 2423.2, GB/T 2423.10, GB/T 2423.21, GB/T 2423.22, GB/T 2423.26, GB/T 2423.56, GB/T 2423.58 and GB/T 2424.26.A.4 gives the relevant information of the test apparatus.

6 Mounting of specimens

The mounting of the test specimens shall simulate the actual mounting state and meet the mounting requirements of GB/T 2423.1, GB/T 2423.2, GB/T 2423.43 and GB/T 2423.58.

7 Severities

The frequency limits of the test frequency range selected by the relevant specifications shall be selected as far as possible in accordance with the number sequence...1, 2, 5, 10, 20, 50... The lower-limit frequency f1 starts at a minimum of 1 Hz. The upper-limit frequency f2 reaches a maximum of 5000 Hz.

8 Preconditioning

The test specimens shall be preconditioned in accordance with relevant regulations.

9 Initial test

In accordance with relevant specifications, the test specimens shall be subject to appearance inspection and electrical and mechanical performance testing.

10 Test

The combined test chamber (room) is at the temperature of the test room. The test specimen, under the condition of not being packaged and not energized, is installed on the vibrating table according to the specified axle; and then the vibration test is performed according to the severity specified by the relevant specification.

11 Intermediate test

Intermediate test shall be completed in the shortest possible time before the end of the test.

12 Recovery

At a rate of not more than 10 kPa/min, the air pressure in the test chamber (room) returns to normal atmospheric pressure. During pressurization, temperature control is not necessary.

13 Final test

In accordance with relevant specifications, the test specimens shall be subject to appearance inspection and electrical and mechanical performance testing.

14 Failure criterion

The failure criterion shall be stipulated by the relevant specifications.

15 Information to be given in the relevant specifications

When the relevant specifications include this test, the details that shall be given are shown in Table 3. […]