Prokit's Industries NT-6560 - Manual (Page 6)

INITIAL OPERATING AND SETTING
Switching on and off
Switches on the instrument and laser. The display shows the
battery symbol until the next button is pressed.
Press and hold this button to switch off the instrument..
The instrument switches off automatically after three minutes of
inactivity.
CLEAR button
The last action is canceled or the data display is cleared, while
making measurements. If in mode of History storage each
single measurement will be deleted from the memory after clicking
the button.
Reference level setting
The default reference setting is from the rear of the instrument.
Press button
to take the
selection from the front edge
， A special beep sounds
whenever the reference
setting is changed. After a
re-startup the reference
returns automatically to the
default setting (rear reference). See fig.D
Fig.D
Press button again to take the next selection from end piece edge.
Press this button, to set the rear reference again.
In a word, to select the reference level, push button 8 repeatedly until
the required reference level is indicated in the display. Each time after
switching on, the rear edge of the measuring tool is preset as the
reference level.
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