The LED above the display use both colors and blinking to indicate the status of the instrument.

Modify Display

The most important information this indicator gives are the red ones; Overload indication and Out of (or almost out of) battery indication.
The complete list if status information is given in the instruction manual.

Front LED Status Information
B/C : Blinking or Continuous
Colours used: Blue, Green, Red and Yellow.

Function  Color B/C
Start up / booting R C
Idle / Ready B C
Waiting for trigger B B
Measuring G C
Event trigger detected G B
Overload R C
Battery low at startup R B
Battery low Y B
After battery low shut off R B
Charging Y B

While the battery is charging a number of blinks will inform you about the charging status.