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Home » Testing Solutions » By Material » Components » Compression » Electronics Keypad

Component Testing: Electronics Keypad

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Keypad Actuation Profiles

Increasing miniaturization of mobile phones means that the alpha numeric keypads used for number dialing and data entry are also becoming smaller. These keypads must be tested to ensure that they are easy enough to use. One measure of this performance is the activation force and profile of individual keys on the keypad. The force required to activate the key should be sufficiently low that the key is easy to press, considering that the phone may be operated by, for example, the elderly. However, the force should not be so low that accidental key presses are likely, for example when the phone is carried in a pocket or handbag.

Keypad Testing

A basic system for keypad testing comprises of a universal testing machine, equipped with a low capacity load cell, and a chuck fixture holding a steel prong. Additionally, a platen or t-slot table is used to support the phone or keypad module. During the test, the load profile, and sometimes the displacement characteristic of the key press, are monitored.

For more detailed information, the electrical contact can be wired into the test system, providing precise determination of the switch closure position and force. In order to provide accurate data, a system with a high data logging rate should be used, so that rapid changes in force which occur over very small distances at switch closure can be observed. In addition, the system used should have high position accuracy and control to avoid damage to delicate components.

Microelectronics Testing Solutions

Ultra High Precision Testing Systems. Mechanical Testing for Microelectronics R&D, production and other varieties of high accuracy, small scale testing.

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  • 3/15/2006
  • 0.9 MB

5900 Series Premier Testing Systems Brochure

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Bluehill Universal Brochure

Bluehill Universal Software is built from the ground-up for touch interaction and an intuitive user experience. Discover simpler and smarter testing with features such as pre-loaded test methods, QuickTest in seconds, enhanced data exporting: and Instron Connect – a new feature that provides a direct communication link to Service. Users of previous versions of software such as Bluehill 2 and Bluehill 3 can easily upgrade to the newest version of Bluehill.

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Instron 3300 Series Universal Testing Systems for Tensile, Compression, Bend, and other material property tests.

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