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New opportunities in the testing of enclosure protection and transport conditions of electronics


​Electrical and electronic products are subject to enclosure requirements (IP classification, Nema) which are affected by the electrical safety requirements of their operating conditions or by other environmental factors. Electronics that are installed in demanding conditions are manufactured to endure such conditions. Alternatively, they can be protected.

New enclosure leak testing services

VTT now performs more extensive enclosure leak testing. We now provide a more extensive range of enclosure testing services.

Testing of protection against foreign objects for encasement classes IP1X …. IP4X (SFS-EN 60529)

The test assesses the ingress protection of the enclosure by different accessibility probe tests.
IP1XProtected against > 50.0 mm diameter foreign objects
IP2XProtected against > 12.5 mm diameter foreign objects
IP3XProtected against > 2.5 mm diameter foreign objects
IP4XProtected against > 1.0 mm diameter foreign objects


High-pressure, high-temperature (80 bar/80 °C) water spray testing (IPX9)

Test for products that are cleaned with pressure washers, such as products installed in vehicles or products used in the product lines in food industry.


Hose-down testing according to NEMA 250 Type 4

During testing, the enclosure is subjected to a stream of water from a hose that has a 25 mm diameter and delivers 250 litres per minute. This testing is required for products sold in the USA.

Testing of transport conditions indicates how well the product endures stress during transportation

The load on transport packaging varies greatly depending on the selected transport method and route. Tests that simulate different loads during transportation are a good way to assess whether product packaging has adequate protective qualities against shock and vibration, for example, as well as moisture.

Transportation of loose cargo tested by simulation

We perform tests on transportation conditions and have introduced a new method of testing the transportation of loose cargo by simulation.

In the test (IEC 60068-2-55 or ISTA 2A), the packaging can bounce freely on the transportation platform. Bouncing is triggered by sinusoidal or random vibration. In sinusoidal vibration, the packaging is subjected to vibration at a frequency that causes the package to start bouncing when the amplitude reaches 25 mm.  It is also possible to use random vibration. In this case, the test level can be based on data measured from the transportation platform or the test can be performed with a standard test profile.

Click here to see a video about transportation condition testing. 


Vibration testing for equipment installed in vehicles

Equipment installed in vehicles is subject to continuous vibration and repeated shocks generated by the engine of the vehicle and the transportation platform. The vibration of the transportation platform is of random nature, with momentary strong accelerations.

To study the effect of vibration generated by the engine at different speeds, it is possible to use a combined random vibration trigger, which combines the fundamental noise with the vibrations generated by the engine at different engine speeds.

To expand our testing services, we have introduced a new combination testing method for random vibration testing (IEC 60068-2-80, STANAG AECTP400, DEF STAN 00-35).

Tel.+358 20 722 7070
Fax+358 20 722 7001

Opening hours 9:00 - 11:00 and 12:00 - 15:00, GMT +2 time zone


P.O. Box 47, FI-02151 Espoo, Finland
Tel. exchange +358 20 722 111
Opening hours Mon - Fri 8:00 - 16:30,
GMT +2 time zone
Fax +358 20 722 7001
Contact us

Tel. +358 20 722 7070
Fax +358 20 722 7001
Opening hours 9:00 - 11:00 and
12:00 - 15:00,
GMT +2 time zone