GB/T 2423.50-2025 PDF English
US$275.00 · In stock · Download in 9 secondsGB/T 2423.50-2025: Environmental testing - Part 2: Test methods - Test Cy: Damp heat, steady state, accelerated test primarily intended for components Delivery: 9 seconds. True-PDF full-copy in English & invoice will be downloaded + auto-delivered via email. See step-by-step procedureStatus: Valid GB/T 2423.50: Evolution and historical versions
| Standard ID | Contents [version] | USD | STEP2 | [PDF] delivery | Name of Chinese Standard | Status |
| GB/T 2423.50-2025 | English | 275 |
Add to Cart
|
0-9 seconds. Auto-delivery
|
Environmental testing - Part 2: Test methods - Test Cy: Damp heat, steady state, accelerated test primarily intended for components
| Valid |
| GB/T 2423.50-2012 | English | 210 |
Add to Cart
|
0-9 seconds. Auto-delivery
|
Environmental testing - Part 2: Test methods - Test Cy: Damp heat, steady state, accelerated test primarily intended for components
| Valid |
| GB/T 2423.50-1999 | English | 359 |
Add to Cart
|
3 days
|
Environmental testing for electric and electronic products - Part 2: Tests - Test Cy: Damp heat, steady state, accelerated test primarily intended
| Obsolete |
Excerpted PDFs (Download full copy in 9 seconds upon purchase)PDF Preview: GB/T 2423.50-2025
Similar standards GB/T 2423.56 GB/T 2423.50-2025: Environmental testing - Part 2: Test methods - Test Cy: Damp heat, steady state, accelerated test primarily intended for components
---This is an excerpt. Full copy of true-PDF in English version (including equations, symbols, images, flow-chart, tables, and figures etc.), auto-downloaded/delivered in 9 seconds, can be purchased online: https://www.ChineseStandard.net/PDF.aspx/GBT2423.50-2025
GB
NATIONAL STANDARD OF THE
PEOPLE’S REPUBLIC OF CHINA
ICS 19.040
CCS K 04
GB/T 2423.50-2025 / IEC 60068-2-67.2019
Replacing GB/T 2423.50-2012
Environmental testing - Part 2.Test methods - Test Cy.
Damp heat, steady state, accelerated test primarily intended
for components
(IEC 60068-2-67.2019, Environmental testing - Part 2-67.Tests - Test Cy. Damp heat,
steady state, accelerated test primarily intended for components, IDT)
Issued on: AUGUST 01, 2025
Implemented on: FEBRUARY 01, 2026
Issued by. State Administration for Market Regulation;
Standardization Administration of the People’s Republic of China.
Table of Contents
Foreword... 3
Introduction... 5
1 Scope... 6
2 Normative references... 6
3 Terms and definitions... 6
4 General... 6
5 Description of test apparatus... 6
6 Severities... 8
7 Preconditioning... 8
8 Initial tests... 8
9 Conditioning tests... 8
10 Intermediate tests... 9
11 Recovery... 10
12 Final tests... 10
13 Information provided in the relevant specification... 10
Annex A (informative) Physical significance of the test... 11
Annex B (informative) Test apparatus and management... 12
Annex NA (informative) Constituting parts of GB/T 2423... 14
Environmental testing - Part 2.Test methods - Test Cy.
Damp heat, steady state, accelerated test primarily intended
for components
1 Scope
This document describes test methods for evaluating the resistance of small electrical
and electronic products (primarily non-hermetically-sealed components) to the
deteriorative effect of damp heat in an accelerated manner.
This test is not suitable for evaluating external effects such as corrosion and deformation.
2 Normative references
For the purpose of this document, there are no normative references.
3 Terms and definitions
For the purpose of this document, there are no terms or definitions that need to be
defined.
4 General
In this test, the test specimen is subjected to very high, unsaturated damp heat vapor
pressure for a relatively long period.
Bias voltage is usually applied.
This test is conducted at a relative humidity of 85 % and a temperature of 85 °C, with
a number of preferred test durations available.
For plastic-encapsulated components, degradation is caused by absorption of moisture
by the plastic and penetration of moisture along the terminals.
The physical significance of the test is described in Annex A.
5 Description of test apparatus
5.1 Test chamber
The test chamber parameters shall meet the following requirements.
a) It can meet the temperature and relative humidity conditions given in Table 1 and
maintain them for at least 2000 h without interruption;
b) During the test, it can provide controlled temperature and humidity conditions,
and the temperature can be increased and decreased according to the specified
conditions;
c) The temperature and humidity within the test chamber can be monitored by
sensors located in the working space and/or other areas that provide same results;
d) Water in the working space can be continuously drained and not reused;
e) Condensed water shall not fall on the test specimen;
f) The chamber wall construction material shall not cause any significant corrosion
of the test specimen or degrade the quality of the humidifying water (see B.1 of
Annex B).
The temperature tolerance of ±2 K takes account of absolute errors in the measurement,
temperature fluctuations at any point and temperature differences between any two
points within the working space.
However, to maintain the relative humidity within the specified tolerance of ±5 %, the
temperature difference between any two points in the working space (at any time) shall
be kept within a narrower range.
If such temperature differences exceed 1.5 K, the specified humidity tolerance will be
exceeded. Therefore, short-term temperature fluctuations caused by the cyclic heating
of the test chamber heater shall also be restricted to a similar value.
The test specimen should not significantly impede the air flow.
Condensation shall not form on the test specimen at any time during the test.
5.2 Humidifying water
Distilled or deionized water shall be used. At 23 °C, the resistivity shall be between
2000 Ω · m ~ 500 Ω · m, corresponding to a conductivity between 5 μS/cm ~ 20 μS/cm.
Before filling the humidifier or water storage tank of the test chamber, all parts of the
test chamber shall be cleaned. Guidance on cleaning is provided in B.3.
NOTE. A conductivity lower than 5 μS/cm may affect the humidifier system. A conductivity higher
than 20 μS/cm can cause limescale or other mineral deposits to form in the humidifier system or on
the specimen.
6 Severities
The relevant specification shall specify the severity defined by duration. Unless
otherwise specified, the severity shall be selected from the durations given in Table 1.
7 Preconditioning
The relevant specification may specify preconditioning.
8 Initial tests
The test specimen shall be inspected for appearance, dimensions, and function as
specified in the relevant specification.
9 Conditioning tests
9.1 The test chamber and test specimen shall be maintained at the same laboratory
temperature, pressure, and humidity conditions, and the test specimen shall be placed
in the working space of the test chamber.
9.2 The test specimen shall not be exposed to radiant heat from the heaters and the test
chamber wall.
If required by the relevant specification, a specific specimen mounting device shall be
used. The heat conductivity and the thermal capacity of the mounting fixtures shall be
sufficiently low so that the test specimen is practically thermally isolated.
Care shall be taken in selecting the materials for the specimen mounting device and
mounting fixture to minimize the effects of contamination and degradation due to
corrosion and other causes (see B.1).
9.3 If required by the relevant specification, a bias voltage shall be applied to the test
specimen during the test. Guidance on the application of bias voltage is provided in B.2.
The bias voltage (or periodic bias voltage) shall be applied to the test specimen when
the temperature and relative humidity have reached the stable state and shall continue
to be applied until the test specimen is under recovery conditions.
9.4 The test procedure is as follows.
a) The temperature and relative humidity of the test chamber shall be raised to
appropriate values. During this period, the temperature and relative humidity shall
not exceed the specified value. No condensation shall form on the specimen at
any time during the test. The temperature and humidity shall stabilize within 3 h.
b) Within the duration specified in the relevant specification, the temperature and
relative humidity shall be maintained within the specified range. The duration
shall be counted from the moment when the test conditions have stabilized.
c) At the end of the specified duration, the temperature and relative humidity of the
test chamber shall be restored to standard atmospheric conditions for
measurement and tests within 1 ~ 4 h. During this period, the temperature and
relative humidity shall not exceed the specified value, and the bias voltage shall
be maintained.
d) Upon completion of the cooling phase, the test specimen shall enter the recovery
procedure.
10 Intermediate tests
The relevant specification may require electrical and/or mechanical inspections during
the test.
If intermediate tests are required, the relevant specification shall specify the test method
and the phase (or phases) during the test period at which the intermediate tests shall be
carried out. The intermediate tests shall not cause any change to the test conditions.
During the test, the test specimen shall not be removed from the test chamber for tests
after recovery.
......
Source: Above contents are excerpted from the full-copy PDF -- translated/reviewed by: www.ChineseStandard.net / Wayne Zheng et al.
Tips & Frequently Asked QuestionsQuestion 1: How long will the true-PDF of English version of GB/T 2423.50-2025 be delivered?Answer: The full copy PDF of English version of GB/T 2423.50-2025 can be downloaded in 9 seconds, and it will also be emailed to you in 9 seconds (double mechanisms to ensure the delivery reliably), with PDF-invoice. Question 2: Can I share the purchased PDF of GB/T 2423.50-2025_English with my colleagues?Answer: Yes. The purchased PDF of GB/T 2423.50-2025_English will be deemed to be sold to your employer/organization who actually paid for it, including your colleagues and your employer's intranet. Question 3: Does the price include tax/VAT?Answer: Yes. Our tax invoice, downloaded/delivered in 9 seconds, includes all tax/VAT and complies with 100+ countries' tax regulations (tax exempted in 100+ countries) -- See Avoidance of Double Taxation Agreements (DTAs): List of DTAs signed between Singapore and 100+ countriesQuestion 4: Do you accept my currency other than USD?Answer: Yes. www.ChineseStandard.us -- GB/T 2423.50-2025 -- Click this link and select your country/currency to pay, the exact amount in your currency will be printed on the invoice. Full PDF will also be downloaded/emailed in 9 seconds. Question 5: Should I purchase the latest version GB/T 2423.50-2025?Answer: Yes. Unless special scenarios such as technical constraints or academic study, you should always prioritize to purchase the latest version GB/T 2423.50-2025 even if the enforcement date is in future. Complying with the latest version means that, by default, it also complies with all the earlier versions, technically. How to buy and download a true PDF of English version of GB/T 2423.50-2025?A step-by-step guide to download PDF of GB/T 2423.50-2025_EnglishStep 1: Visit website https://www.ChineseStandard.net (Pay in USD), or https://www.ChineseStandard.us (Pay in any currencies such as Euro, KRW, JPY, AUD).
Step 2: Search keyword "GB/T 2423.50-2025".
Step 3: Click "Add to Cart". If multiple PDFs are required, repeat steps 2 and 3 to add up to 12 PDFs to cart.
Step 4: Select payment option (Via payment agents Stripe or PayPal).
Step 5: Customize Tax Invoice -- Fill up your email etc.
Step 6: Click "Checkout".
Step 7: Make payment by credit card, PayPal, Google Pay etc. After the payment is completed and in 9 seconds, you will receive 2 emails attached with the purchased PDFs and PDF-invoice, respectively.
Step 8: Optional -- Go to download PDF.
Step 9: Optional -- Click Open/Download PDF to download PDFs and invoice.
See screenshots for above steps: Steps 1~3 Steps 4~6 Step 7 Step 8 Step 9
|