GB/T 2423.59-2008 English PDF (GBT2423.59-2008)

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GB/T 2423.59-2008: Environmental testing - Part 2: Test methods - Test Z/ABMFh: Combined temperature (cold and heat) / low air pressure / vibration (random)
GB/T 2423.59-2008
GB
NATIONAL STANDARD OF THE
PEOPLE’S REPUBLIC OF CHINA
ICS 19.020
K 04
Environmental testing for electric and electronic products -
Part 2: Test methods - Test Z/ABMFh: Combined
temperature (cold and heat)/low air pressure/vibration
(random)
ISSUED ON: DECEMBER 30, 2008
IMPLEMENTED ON: NOVEMBER 01, 2009
Issued by: General Administration of Quality Supervision, Inspection and
Quarantine;
Standardization Administration of the People's Republic of China.
Table of Contents
Foreword ... 3
1 Scope ... 4
2 Normative references ... 4
3 Terms and definitions ... 5
4 General description ... 5
5 Test equipment ... 5
6 Installation of test specimens ... 6
7 Severities ... 6
8 Pretreatment ... 9
9 Initial inspection ... 9
10 Testing ... 9
11 Intermediate inspection ... 11
12 Recovery ... 11
13 Final inspection ... 12
14 Failure criteria ... 12
15 Information to be provided in relevant specification... 12
Annex A (informative) Guidelines ... 15
Annex B (informative) Parts of GB/T 2423 ... 18
Environmental testing for electric and electronic products -
Part 2: Test methods - Test Z/ABMFh: Combined
temperature (cold and heat)/low air pressure/vibration
(random)
1 Scope
This Part of GB/T 2423 specifies the basic requirements, severities, test procedures and
other technical details for the combined temperature (cold and heat)/low air
pressure/vibration (random) test.
This Part applies to the determination of the adaptability of products under the
combined effects of temperature (cold and heat), low air pressure and vibration
(random). This Part applies as a reference to combined tests with temperature changes.
2 Normative references
The provisions in following documents become the provisions of this Part of GB/T
2423 through reference in this Part. For dated references, the subsequent amendments
(excluding corrigendum) or revisions do not apply to this Part, however, parties who
reach an agreement based on this Part are encouraged to study if the latest versions of
these documents are applicable. For undated references, the latest edition of the
referenced document applies.
GB/T 2422, Environmental testing - Guide to drafting of test methods - Terms and
definitions
GB/T 2423.1, Environmental testing - Part 2: Test methods - Tests A: Cold (GB/T
2423.1-2008, IEC 60068-2-1:2007, IDT)
GB/T 2423.2, Environmental testing - Part 2: Test methods - Tests B: Dry heat (GB/T
2423.2-2008, IEC 60068-2-2:2007, IDT)
GB/T 2423.21, Environmental testing - Part 2: Test methods - Test M: Low air
pressure (GB/T 2423.21-2008, IEC 60068-2-13:1983, IDT)
GB/T 2423.26, Environmental testing - Part 2: Tests methods - Test Z/BM:
Combined dry heat/low air pressure tests (GB/T 2423.26-2008, IEC 60068-2-
41:1976, IDT)
GB/T 2423.43, Environmental testing for electric and electronic products - Part 2:
Test methods - Mounting of specimens for vibration impact and similar dynamic
tests (GB/T 2423.43-2008, IEC 60068-2-47:2005, IDT)
GB/T 2423.56, Environmental testing - Part 2: Test methods - Test Fh: Vibration,
broadband random and guidance (GB/T 2423.56-2006, IEC 60068-2-64:1993, IDT)
GB/T 2424.1, Environmental testing for electric and electronic products - Guidance
for high temperature and low temperature tests (GB/T 2424.1-2005, IEC 60068-3-
1:1974, IDT)
GB/T 4796, Classification of environmental conditions - Environmental parameters
and their severities (GB/T 4796-2008, IEC 60721-1:2002, IDT)
3 Terms and definitions
For the purposes of this Part, the terms and definitions given in GB/T 2422, GB/T
2423.1, GB/T 2423.2, GB/T 2423.56, GB/T 2423.21 and GB/T 2423.26 apply.
4 General description
This test is a combined test of Test A (cold), Test B (dry heat), Test M (low air pressure)
and Test Fh (vibration (random)).
The test specimens shall be subject to a vibration (random) test, a temperature test and
a combined temperature/low air pressure test at the test room temperature in sequence
according to the test procedure, and finally superimposed with vibration (random) to
make the test specimens withstand a combined test of temperature (cold and heat)/low
air pressure/vibration (random). When the test specimen has passed a single vibration
(random) test, a single temperature test and a combined temperature/low air pressure
test, the combined temperature (cold and heat)/low air pressure/vibration (random) test
can be directly carried out.
Whether the test specimen is in working condition during the test shall be stipulated by
the relevant specifications.
5 Test equipment
5.1 General requirements for test equipment
Unless otherwise specified in the relevant specifications, the test equipment shall meet
the requirements for test equipment in GB/T 2423.1, GB/T 2423.2, GB/T 2423.21 and
GB/T 2423.56.
It is at the test room temperature in the comprehensive test chamber (room). The test
specimen shall be installed on the vibrating table according to the specified axial
direction under the state of no packaging and no power supply, and then the vibration
(random) test shall be carried out according to the severity specified in the relevant
specifications.
When required by relevant specifications, the test specimens shall be tested for
performance.
10.2.2 Temperature test
Keep the test specimen in the installation during the vibration (random) test.
The temperature in the test chamber (room) shall be adjusted to the value specified in
the relevant specifications, and the temperature of the test specimen shall be stabilized.
The average rate of temperature change in the test chamber (room) is: 0.7 °C/min ~
1 °C/min (the average rate is calculated every 5 minutes).
When required by the relevant specifications, perform performance testing on test
specimens.
10.2.3 Combined temperature/low air pressure test
After 10.2.2, the air pressure in the test chamber (room) drops to the value specified in
the relevant specifications; the rate of air pressure change shall not be greater than 10
KPa/min or as specified in the relevant specifications.
After the temperature and air pressure reach the specified value of the relevant
specification and stabilize, when required by the relevant specifications, carry out a
performance test on the test specimen.
10.2.4 Combined temperature (cold and heat)/low air pressure/vibration (random)
test
After the temperature and air pressure reach the specified value and stabilize, carry out
the vibration (random) test according to the severity stipulated in the relevant
specifications. When the vibration response check is required to determine the critical
frequency of the test specimen, the temperature and air pressure shall be kept constant
for the specified duration. See Figure 2 or Figure 3.
When required by the relevant specifications, perform performance testing on test
specimens.
Stop the vibration at the end of the test, and cut off the power or unload the test
specimens running (or working) during the test.
11 Intermediate inspection
Intermediate inspection shall be completed within the shortest possible time before the
end of the test.
Relevant specifications may specify loading and/or testing during or at the end of the
test (the test specimen shall be still in the test chamber), and the testing items and time
shall be specified when necessary. When testing, the test specimen shall not be taken
out of the test ch...