A touch-down counter is provided that maintains a count of how many times
integrated circuits are placed into contact with a contactor in a test
handler. The test handler has a work press that places integrated
circuits into contact with pogo pins in the contactor. The pins are
subject to wear and should be maintained by periodic cleaning. The
touch-down counter has a sensor such as a non-contact Hall effect sensor
that is attached to the contactor. A magnet is affixed to the side of the
work press. When the work press comes into the vicinity of the sensor,
the sensor detects the presence of the magnet and registers a contactor
touch-down event. A lifetime count of touch-down events may be displayed
on the counter. When a recommended threshold value of touch-down events
has been exceeded, a test system operator can remove the contactor from
use for cleaning.