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©2012 Johnson Level & Tool
1. Battery Installation
Open the battery door, and put in one 9V battery according to the
polarity shown inside. Then snap the battery door
back.
Note:
• Remove the battery when the unit is being
stored for a long time.
• Replace the battery when the low voltage
indicator shows a low battery.
2. Operating Instructions
IMPORTANT:
This detector will only work when the laser is in
the pulse mode.
A. Press the Power on/off key:
The detector
will beep twice and all the symbols will be
displayed on the display window. After
0.5 seconds the detector will enter its
detecting mode.
B. Detecting the horizontal laser signal:
Put
the detector in a vertical position and center
the bubble in the horizontal vial with the
reception window facing the laser. A down
arrow shown on the display window and a lit
red light indicates the laser signal is below the detectors on grade
3. Operation Instructions
6339H_Manuals 10/24/12 12:56 PM Page 16
