Testknopf

Testknopf is a German-language term used in technical contexts to denote a control that initiates a test sequence. The word combines Test and Knopf (button) and is used to refer to a control—either physical, such as a push button, or virtual, such as a software trigger—that starts diagnostic, calibration, or verification procedures on devices and systems.

Function and placement: When activated, a Testknopf typically triggers self-tests, hardware checks, or calibration routines, and may report results via indicator lights, a display, or an on-screen message. It is commonly located on control panels or front panels and may be accompanied by labeling that clarifies the test scope. In some devices, it also acts as a reset or diagnostic entry point, and it may require a held press or a sequence to prevent accidental activation.

Contexts and variations: The term is widely used in consumer electronics, industrial equipment, automotive systems, and laboratory instruments. In software, the equivalent action might be a menu option or hotkey labeled "Test" or "Diagnostics" rather than a physical button. In safety-critical applications, activation of the Testknopf is regulated by procedures to ensure it does not interfere with normal operation.

See also: diagnostic button, self-test, reset button, calibration.