Temperature dependence

FOGGING TEST IN THE
AUTOMOBILE INTERIOR

The fogging test is an essential test for materials used in vehicle interiors. It ensures that your components do not release unwanted volatile substances that could deposit on windows or other surfaces. The fogging test is an essential test for determining the outgassing of volatile organic compounds (VOCs) from materials in the vehicle interior. It ensures that emissions, which can appear as fog or mist on cold surfaces such as windscreens, are minimized to ensure driver visibility and safety. These deposits can not only impair visibility, but also reduce the perceived quality and comfort in the vehicle.

SAFETY AND RELIABILITY IN ANY CLIMATE

In the modern automotive industry, electrical systems are an essential part of the vehicle - from the control and assistance systems to the entertainment electronics. However, as the complexity of these systems increases, so does the need to ensure their reliability and safety under all conditions. One of the biggest challenges: Temperature-dependent influences on electrical components.

In practice, vehicles are exposed to extreme temperature conditions - from icy cold to blistering heat. The functionality and safety of electrical systems must always be guaranteed under these conditions. This is where temperature-dependent electrical tests come into play. They are not only a basis for meeting legal requirements such as compliance with the VW 80000, LV124 and GS 95024-2 standards, but also make a decisive contribution to ensuring the quality and market acceptance of your products.

As an experienced testing service provider, we are at your side for all challenges. Using proven test methods and modern technologies, we test the reliability, long-term stability and safety of your electrical systems under extreme temperature conditions. From temperature cycles and high and low temperature tests to long-term loads, we offer you a comprehensive range of test methods to identify and eliminate weak points at an early stage.

Temperature cycles

Components are subjected to repeated temperature changes to test their reaction to these conditions.

High and low temperature tests

The components are exposed to extreme temperatures in order to evaluate their performance and robustness.

Long-term stress tests

These tests simulate the long-term effects of temperature on the components and help to detect material fatigue or other age-related changes.

Your requirements: Our expertise

We carry out your test requirements accredited and in accordance with the test specifications to ensure the highest OEM standards:

BMW GS 95024-3-1
BMW GS 95024-2
Mercedes-Benz MBN LV 124
Volkswagen VW 80000
Tesla TS-0002476

Ford CETP: 00.00-E-412
Stellantis (FCA) CS.00056
General Motors GMW3172
MAN M 3256-1
Scania TB1900

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CONTACT OUR EXPERTS

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Your requirements: Our expertise

Temperature-dependent electrical tests are crucial to guarantee the functionality and safety of vehicle components. The most important aspects are

Reliability: Vehicles must function perfectly under a wide range of temperature conditions. Temperature changes and extreme temperatures can affect the performance of electrical components.

Long-term stability: Temperature-dependent tests can identify potential weak points that could have an impact over the lifetime of a vehicle.

Safety: The safety of vehicle use depends heavily on the functionality of the electrical systems. Defects caused by temperature changes can lead to critical safety problems.

VW 80000

This standard describes the requirements for the electrical and electronic safety of vehicle components. It specifies how tests must be carried out under different temperature conditions to ensure that the components function reliably even under extreme conditions.

MBN50306/MBN10567

This standard (formerly LV124) defines the requirements for the electrical and electronic testing of automotive components. It places particular emphasis on the thermal stability and electromagnetic compatibility (EMC) of components. Temperature-dependent tests are crucial here in order to test the long-term stability and functionality of the components.

GS 95024-2

This standard deals with the specific requirements for electronic components with regard to their resistance to thermal and mechanical influences. It specifies how tests must be carried out to ensure that the components function even under extreme temperatures and changing environmental conditions.

FAQ

Frequently asked questions about the fogging test

What is the fogging test? The fogging test measures the release of volatile substances from materials that can deposit on surfaces such as windows.

How long does a fogging test take? As a rule, you will receive the results within a few days, depending on the complexity of the materials.

What do I do if the exam is negative? We offer you comprehensive advice and recommendations to take appropriate measures and find alternative materials.

What sample quantities are required for a fogging test?

The sample quantities required for a fogging test depend on the standard and the test method used. Here are the general guidelines:

1. standard DIN 75201 (type A and type B)

Type A (glass plate method):
A sample quantity of 10 cm² is typically required. The sample is placed on a heated plate in a sealed chamber and the volatiles released condense on a glass plate above.
Type B (aluminum foil method):
Similar to type A, a sample volume of approximately 10 cm² is used. However, the volatile substances condense on a cooled aluminum foil.

2. standard ISO 6452 (international standard)

Sample quantity:
Again, a sample size of about 10 cm² is typically required to evaluate the amount of volatiles released at elevated temperature.

3. other specific requirements

Depending on the specific requirements of the customer or OEM standards, sample quantities may vary. It is important to check the respective standards or test requirements carefully.

What is the difference between the reflectometric and gravimetric test method according to DIN 75201?

Method A - Reflectometric method:

Principle: This method measures the change in reflectivity on a glass plate on which volatile components from the material sample are deposited.
Procedure: A material sample is heated in a beaker while a glass plate above it is cooled to 21°C. The temperature difference causes the volatile components to condense on the glass plate. The reflectance index of the fogged glass plate is then measured to determine the amount of condensed material.
Application: This method is particularly suitable for materials for which an exact determination of the optical fog effect is required.

Method B - Gravimetric method:

Principle: This method measures the weight of condensed volatiles on an aluminum foil.
Procedure: The material sample is heated in a beaker while an aluminum foil disc is cooled to 21°C. After 16 hours, the amount of condensed material on the foil is weighed.
Application: This method is ideal for an accurate quantitative determination of the amount of condensed volatiles.

FAQ

FREQUENTLY ASKED QUESTIONS ABOUT TEMPERATURE-DEPENDENT ELECTRICAL TESTS

What is a temperature-dependent electrical test? Vehicle components are exposed to different temperatures and temperature cycles in order to test their reaction to these conditions.

What test methods are available?

We use various methods as part of the temperature-dependent electrical tests:

Temperature cycling: components are subjected to repeated temperature changes to test their response to these conditions.

High and low temperature tests: Components are exposed to extreme temperatures to evaluate their performance and robustness.

Long-term stress tests: These tests simulate the long-term effects of temperature on the components and help to detect material fatigue or other age-related changes.

Do you have any further questions? Our experts will be happy to answer your questions about various laboratory tests. Please feel free to contact us here. We look forward to processing your inquiry and helping you further.

Fogging

FOGGING TEST IN THE
AUTOMOBILE INTERIOR

Typical test methods

TEMPERATURE DEPENDENCE