An arrow that points up indicates the channel is being overloaded in the signal is too high. An arrow that points down indicates the channel is under loaded in the signal is too low. Upper displays for the hammer in the lower displays for the accelerometer.
1. Check connections. Re-Practice tapping less hard.
2. Tap the tool lighter for upward pointed arrow or use less sensitive accelerometer.
3. Hit harder for an arrow pointed down or use a more sensitive accelerometer.
4. If you get arrows pointed in both directions, click on the repractice button.
