Negative Touch Flag

The Negative Touch flag is set when negative touch is detected. The negative touch threshold provides a mechanism for detecting when an element's measurement count adjusts quickly in the direction opposite of a touch. This scenario might happen during device power-up if a user has their hand covering an electrode during power-up calibration. The library makes the assumption at power-up that there is no user interaction. This may not always be the case. If the system is calibrated with a user touching a sensor, when they remove their hand, the measurements from that sensor's elements will quickly adjust in the opposite direction of a touch. Setting a negative touch threshold provides a way to quickly detect this event. Upon detection, the application will re-calibrate to ensure full sensitivity from the electrode immediately following the "negative" touch.

To modify the Negative Touch Threshold:

1. Go to the sensor window -> Tuning tab -> Change Negative Touch Threshold*

*Click the Negative Touch Threshold parameter in sensor window for more information.