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3708H_Manuals 7/20/10 11:27 AM Page 1
Detector Usage Model No. 40-6770
1. Technical Specifications
Detecting accuracy Fine
Turn-off time
Operating voltage
Size
Weight
Dust and rain resistant
Illuminated Screen
Multi-functional double sides display
Buzzer for recognizing location
©2010 Johnson Level & Tool
±0.039" (±1mm)
Coarse ±0.098" (±2.5mm)
5 minutes
DC9V
6-3/4" x 3" x 1" (0.266 x 0.118 x 0.029mm)
0.55 Ibs (0.249 Kg)
1
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Summary of Contents for Johnson 40-6770
- Page 1 3708H_Manuals 7/20/10 11:27 AM Page 1 Detector Usage Model No. 40-6770 1. Technical Specifications Detecting accuracy Fine ±0.039" (±1mm) Coarse ±0.098" (±2.5mm) Turn-off time 5 minutes Operating voltage DC9V Size 6-3/4" x 3" x 1" (0.266 x 0.118 x 0.029mm) Weight 0.55 Ibs (0.249 Kg)
- Page 2 9. Display window 10. Reference rabbet 11. Location hole 12. Threaded hole 13. Battery-box cap (b) Display 1. Power symbol 2. Low battery symbol 3. Coarse/Fine detection symbol 4. Sound symbol 5. Detecting position symbol ©2010 Johnson Level & Tool...
- Page 3 • When low battery symbol is displayed, change the battery. • Press the power button again to turn off the instrument. (c) Using the clamp 1. Adjusting bolt 2. Quick release button 3. Detector connecting screw ©2010 Johnson Level & Tool...
- Page 4 • Tighten the adjusting bolt and mark the position on the grade rod next to the rabbet. This mark will be the horizontal reference in the coarse mode. ©2010 Johnson Level & Tool...
- Page 5 • When the instrument makes a rapid sound, move it slightly downwards. • When the instrument makes a continuous sound, it is level with the laser beam. • If there is no sound heard, the detector is not receiving the laser signal. ©2010 Johnson Level & Tool...
- Page 6 (f) Turn-off timer • The detector will automatically turn off if it has not received a laser signal for 5 minutes (g) Back light system • Press the back light button which will illuminate the display window. ©2010 Johnson Level & Tool...