Operating Instructions for General Construction Applications
Note:
A level plane of laser light is created by the rotating beam of
the laser. The laser light can be used to reference elevations with
the use of a laser detector.
1) Place the unit on a flat, level surface such as a tripod. Setup
the unit in an area where it cannot be obstructed and is set at a
convenient height.
2) Press the I/O button. Allow the unit to self-level.
Setup a “Benchmark” (page 7).
3) Take elevation readings using the plane of laser light as a refer-
ence.
8 . LT-850
Operating Instructions for General Construction Applications
Note:
A level plane of laser light is created by the rotating beam of
the laser. The laser light can be used to reference elevations with
the use of a laser detector.
1) Place the unit on a flat, level surface such as a tripod. Setup
the unit in an area where it cannot be obstructed and is set at a
convenient height.
2) Press the I/O button. Allow the unit to self-level.
Setup a “Benchmark” (page 7).
3)Take elevation readings using the plane of laser light as a refer-
ence.
4) Follow the Detector Operation Procedures in this manual.
8 . LT-850
LT-850 . 9
Level Accuracy ...................... +/- 1/16” @ 100 ft. (1.6mm @ 30m)
Operating Range (Diameter) .................... up to 2,000 ft.* (700m)
Self-Leveling Range ............................................... approx. +/- 8˚
Compensation Type
Level Mode ................................................ Electronic Self Leveling
Grade Mode .............................................. Electronic Self Leveling
Grade Increments .......................... 0.01% from -2.5 to 2.5% Slope
Grade Accuracy ........................................... 0.01 to 2.5% = 0.01%
2.5 to 15% = 0.08%
Laser Type ........... 635nm Visible, (Class 3a FDA) (Class 3R IEC)
Battery Life 20˚C (68˚F) C-cell alkaline .................. approx. 60hr.
Operating Temp ............................... -4˚F to 122˚F (-20˚C to 50˚C)
Tripod Mount ..................................................................... 5/8 x 11
*
determined by receiver used
Specifications
Always clean the instrument after use. Use a soft, dry cloth to
remove any dirt or moisture from the instrument. Do not use
benzene, paint thinner, or other solvents to clean the instrument.
Remove batteries before storage of the instrument.
Alkaline batteries are recommended for use with the instrument.
Commercially-available manganese, Ni-CD and Ni-MH batteries
may be used but the operating time will differ to that for alkaline
batteries. Always replace all 4 batteries at the same time. Do not
use a combination of old and new batteries.
Care of Instrument
LT-850 . 9
Specifications
Care of Instrument
Level Accuracy ...................... +/- 1/16” @ 100 ft. (1.6mm @ 30m)
Operating Range (Diameter) .................... up to 2,000 ft.* (700m)
Self-Leveling Range ............................................... approx. +/- 8˚
Compensation Type
Level Mode ................................................ Electronic Self Leveling
Grade Mode .............................................. Electronic Self Leveling
Grade Increments .......................... 0.01% from -2.5 to 2.5% Slope
Grade Accuracy ........................................... 0.01 to 2.5% = 0.01%
2.5 to 15% = 0.08%
Laser Type ........... 635nm Visible, (Class 3a FDA) (Class 3R IEC)
Battery Life 20˚C (68˚F) C-cell alkaline .................. approx. 60hr.
Operating Temp ............................... -4˚F to 122˚F (-20˚C to 50˚C)
Tripod Mount ..................................................................... 5/8 x 11
*
determined by receiver used
Always clean the instrument after use. Use a soft, dry cloth to
remove any dirt or moisture from the instrument. Do not use
benzene, paint thinner, or other solvents to clean the instrument.
Remove batteries before storage of the instrument.
Alkaline batteries are recommended for use with the instrument.
Commercially-available manganese, Ni-CD and Ni-MH batteries
may be used but the operating time will differ to that for alkaline
batteries. Always replace all 4 batteries at the same time. Do not
use a combination of old and new batteries.
