Operation
1.
Turn on the unit by pressing the ON/OFF pad. The LCD symbols will momentarily
flash (Fig. B).
2.
Expose the beam capture window of the laser detector towards the direction of the
rotating laser.
3.
Slowly move the laser detector in an upward and downward direction until the LCD beam
indicator arrows appear and/or a pulsing audio signal is heard. Select the desired Beam
Resolution, according to the job conditions and the precision required (to see the available
Resolutions, please refer to the Specs Table).
4.
Move the detector upward when the low beam indicator light is lit (with volume on, a short
pulsing audio tone is heard). Move the detector downward when the high beam indicator
arrow is lit (with volume on, a long pulsing audio tone is heard). When the beam is level, the
level beam indicator line will be lit and a solid audio tone will be heard.
If the detector is not struck by a laser beam after 5-8 minutes, the detector will automatically shut
itself off to preserve battery life.
Turn the unit back on using the power button.
Special features
The laser detector includes a rod clamp which allows to mount the detector onto square, round or
oval sighting rods.
The detectors are gasket sealed for water and dust protection. Remove any moisture or dirt with a
soft, dry cloth.
Do not use aggressive cleaning agents or solvents. Remove batteries before storage of
the instrument.
The LCD display of the detector LD-400 has seven distinct channels of information, indicating the
position of the detector in the plane of laser light, as indicated in Fig. C (the detectors LD-120 and
LD-100N have three).
As you move the detector closer to the center, the arrows fill in to indicate the laser position.
The detector has a unique memory feature, which preserves the last position of the laser beam if
the detector is moved out of the plane of laser light, as well as built in electronic filtering for bright
sunlight and electromagnetic interference.
The detector LD-400 has three speaker selections (Off, Loud (105dBA) and Louder (125+ dBA)),
whereas the models LD-120 and LD-100N have only two (Off and On).
LM30 Rotary Laser • 13