Turning On/Off the Laser
Green LED flashes during self-leveling once a
second.
When leveled, the green LED lights solid for
the first five minutes or 30 seconds
(depending on Settings), then flashes every 4
seconds indicating the laser remains level and
the HI-alert has been activated
If a grade value has been dialed in, the unit
starts the temperature/reference check while
the thermometer symbols are flashing.
When the temperature/reference check has
been finished, the standard display appears
and the A symbols flash until self-leveling has
been completed.
Pressing and holding the button shows the
actual rotation speed and the internal
temperature.
To turn the unit off, press and hold the button for
2 seconds!
GL412N
GL422N