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IEC 60068-2-75 Mechanical Impact TestingIEC 60068-2-75 Environmental Hammer Test

An impact test such as IEC 60068-2-75 is fitting for equipment likely to be used in areas with non-restricted access and where impacts can occur. As a certified environmental lab, we realize the importance of IEC environmental 60068-2-75 testing. Meeting the environmental and international standard requirements can be difficult. We understand the challenges and guide companies through the process.

Keystone takes a consultative approach throughout the entire test program. We provide comprehensive reports shortly after the completion of IEC environmental standard testing. Our pricing is competitive and we offer volume discounts. Keystone Compliance creates an accurate test plan to eliminate expensive over-testing. Keystone provides the peace of mind that all of your needs will be met.

Request a quote to receive testing services tailored to your specific requirements. Ready to get started? We are. Contact us to see why so many companies work with us to achieve their environmental standard testing needs.

Summary of IEC 60068-2-75 Environmental Standard Testing

Mechanical impacts likely to stress electrotechnical equipment in service can be generated by hammers of various types. IEC 60068-2-75 provides three international standardized test methods for determining the ability of a specimen to withstand rigorous and stringent impacts. The IEC 60068-2-75 test is used primarily to establish an acceptable level of robustness when assessing the safety of a product.

Furthermore, the IEC standard test method is mainly used for electrotechnical devices. For equipment destined for areas with restricted access, an impact test may be appropriate but is likely to be of a lower severity. It is particularly applicable when equipment is brittle.

The IEC 60068-2 test covers energy levels ranging from 0,14 joules to 50 joules. There are three types of apparatus applicable to perform these tests.

Scope of IEC 60068 Environmental Testing of Impacts

For this IEC impact test method, the severity of the hammer test is defined by the impact energy value and number of impacts. The energy value must be one of the following: 0,14 – 0,2 – (0,3) – 0,35 – (0,4) – 0,5 – 0,7 – 1 – 2 – 5 – 10 – 20 – 50 J (joules). Unless otherwise recommended, the number of impacts is generally three impacts per location.

Three different test methods are practicable for this IEC 60068 test. All three methods are intended to give similar results. To reach repeatable and reproducible results, this test is more dependent on the details of the test apparatus.

The specimen will be either mounted in one of two ways. It can be mounted by its normal means on a rigid plan support. Yet, the specimen can also be placed against a rigid plan support.

To ensure that the specimen is rigidly supported, care is taken when performing the test to place the specimen against a solid support. There must be no gaps between the sheet and the support. 

Conditioning may include measurements of the visual, dimensional, and functional checks prescribed by this IEC 60068 specification. The testing specification will state any requirements for securing bases, covers, and similar items before the item is subjected to impacts. Lastly, the IEC 60068-2 test relevant spec must state if the item is required to operate during impact or whether any functional monitoring is required.

Standard IEC 60068 2 Environmental Testing Procedures

The choice of the test apparatus depends on the orientation of the surface to be tested. It may also depend on the energy level. Not all methods can be used in every case. The three types of test apparatus are:

  • The pendulum hammer
  • The spring hammer
  • The vertical hammer

Test Eha: Pendulum Hammer Test – This impact test consists of a pendulum rotating at its upper end in such a way as to be kept in a vertical plane. The axis of the pivot is 1,000 mm above the measuring point. For testing heavy, voluminous, or difficult-to-handle items, a portable pendulum is used. In all cases, when the pendulum is released, it is allowed to fall only under the influence of gravitational force.

Test Ehb: Spring Hammer Test – The spring hammer is made up of three general parts: the body, the striking element, and the release system. The body comprises the housing, the guide for the striking element, the release mechanism, and all rigidly fixed parts. The striking element comprises the hammer head, hammer shaft, and cocking knob. The force to release the striking element will not exceed 10 N.

Test Ehc: Vertical Hammer Test –  This compliance test consists of a hammer with a striking element that falls freely from rest through a vertical height. The hammer falls onto the IEC test specimen surface held in a horizontal plane. The fall of the striking element is along a guideway with negligible breaking. This guideway can not rest on the specimen and the striking element must be free of the guideway on striking the specimen.

Keystone Compliance Offers Expert IEC 60068-2-75 Impact Testing

Our team strives to give our customers more time and energy on product development instead of testing. Keystone has a full lab of test equipment which permits us to provide short lead times on scheduling. In addition to IEC 60068-2 standard testing, Keystone has a full scope of expertise including MIL-STD-810 pyroshock, sand and dust, humidity, and rain.

Ready to get started? We are. Contact us to see why so many companies work with us to achieve their military standard testing needs.

For more information on relative IEC 60068-2 testing standards, please follow the links below