Concepts presented herein relate to a portable device that includes a frame and a fixture for engaging a mechanical probe to be calibrated. The fixture can be a platform of hard material that receives pushing action of the mechanical probe. A displacement sensor senses position of the platform with respect to the frame. An actuator is coupled to the displacement sensor and a controller is coupled to the actuator. The controller operates the actuator to cause the platform to move to a position (as indicated by the displacement sensor), while the force required to cause the displacement is measured with a force sensor.