041365_Umschlag_LL300.qxd 21.12.2004 12:40 Uhr Seite 1 LL300 © 2004, Trimble Navigation Limited.
041365_Umschlag_LL300.qxd 21.12.
GB TABLE OF CONTENTS FOR YOUR SAFETY Important Information COMPONENTS POWER SUPPLY Installing the Batteries Operating Time Charging the Batteries HOW TO USE THE LASER Laser Setup Self-leveling and Height (HI) Change Alert Manual-/Single Slope Mode OPERATING EXAMPLES Determining the Height of Instrument (HI) Marking Heights Vertical Application LEVELING ACCURACY Influences on Leveling Accuracy Checking Calibration MAINTENANCE AND CARE SYSTEM CLEANING PROTECTING THE ENVIRONMENT WARRANTY SPECIFICATIONS 5 5 6
COMPONENTS Buttons 1 Power Button 2 Manual Button Control indicators 3 Leveling Indicator 4 Manual/HI-Warning Indicator 5 Battery Indicator Elements of the unit 6 Infrared Receiver (for remote control) 7 Rotor Cage 8 Sighting Guides 9 Beam Aperture/Prism Cap 10 Elastic Rubber Boot 11 Handle 12 Battery Door 13 5/8x 11 Tripod Mounts 14 Rubber Feet POWER SUPPLY Before using the unit for the first time, install alkaline or rechargeable batteries. If Ni-Cads are used, first recharge the batteries.
Charging the batteries The charger requires approx. 10 hours to charge empty rechargeable batteries. For this charging, connect the plug of the charger to the recharge jack of the unit. New or long-time out-of-use rechargeable batteries reach their best performance after being charged and recharged five times. The batteries should only be charged when the laser is between 50° F and 104° F (10° C to 40° C) Charging at a higher temperature may damage the batteries.
OPERATING EXAMPLES Determining the Height of Instrument (HI) The height of instrument (HI) is the elevation of the laser’s beam. The HI is determined by adding the grade-rod reading to a benchmark or known elevation. Set up the laser and place the grade rod on a job-site benchmark (BM) or known elevation. Slide the receiver up/down the grade rod until it shows an on-grade reading. Add the grade-rod reading to the benchmark to determine the height of instrument. Example: Benchmark = 30.55 m (100.
In order to avoid offset errors, the receiver should be used close to the elevation where the laser has been set up. If a remote control is available, the up and down arrow buttons can be used for fine adjustments. LEVELING ACCURACY Influences on the leveling accuracy The overall accuracy of the unit can be influenced by many factors: • factory accuracy; • temperature of the unit; • ambient influences like rain, wind and temperature.
2 A 2.2 B h 1.1 2.1=1.2 If the unit is within its working accuracy limits (± 20”) the maximum difference from true level at 20 m (65 ft.) + 20 m (65 ft.) = 40 m (130 ft.) is 4 mm (3/16 inch). Repeat the above steps for “minus X” and for “plus-” and “minus Y”, so that a measurement for all four axes of the unit have been performed. The accuracy of the detector has to be regarded. PROTECTING THE UNIT Do not expose the unit to extreme temperatures or temperature changes (do not leave inside the car).
SPECIFICATIONS Leveling Accuracy1, 3: < ± 18 arc seconds, < ± 2.6 mm/30 m (< ± 3/32in./100 ft) 600 rpm 400 m (1315 feet) 635 nm Class 3R, <5mW approx. ± 8% (approx. ± 4,8°) approx. 30 sec LED flashes approx. 8 mm at the laser 4 x D-cell NiCad or alkaline batteries (LR20) -20° C ... 50° C (-4° F...122° F) -20° C ... 70° C (-4° F...
