Johnson Level & Tool Mfg. 40-6790 - Manual (Page 8)

8 ©2009 Johnson Level & Tool
Power saving function
Press and hold the backlight key for more than 3 seconds. The
middle green LED indicator will flash three times and the power
saving function is turned on. If the detector does not receive a laser
signal for 30 minutes, and there are no other keypad operations
during these 30 minutes, the unit will automatically turn off to
prolong the battery life. Press and hold the backlight key again and
the middle green LED indicator will flash once and the power saving
function is turned off.
Low battery indicator
If the LCD blinks the battery symbol, it means the
batteries are low and should be changed soon. If
the battery power is very low, the detector will
shut off automatically.
Memory function
If the last signal the detector received from the laser beam was up or
down, the detector will remember which direction it received the
signal from. The LED and LCD display arrow will flash 5 times in the
direction of the last signal received from the laser beam.
flashing
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