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©2009 Johnson Level & Tool
3. Operation Guide
(a) Battery Installation
• Open the battery cover door by turning the battery cover screw
counter-clockwise. Put the battery into the
battery case noting the polarity shown in
the battery compartment.
• Put the battery cover door back, and tighten
the screw.
Note:
1) Remove the battery when the unit is being stored for a
long time.
2) When the low battery indicator is displayed, change the
battery soon.
4. Operating Instructions
Power On
Press the power key to turn the unit on. The
LCD display will illuminate all the indicator
segments for 0.5 second (Fig.2). When the
indicator segments are no longer
illuminated, the detector is ready for use.
Note:
The LCD display will still have the
power, detection and sound indicators illuminated (Fig. 3).
Figure 2
Figure 3
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