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7-5. Ambient Illuminance and Visibility of Laser Line
The visibility of the laser line on the workpiece changes depending on the brightness of the working environment.
Instruct the customer to consider the brightness of the working environment when using the laser marker referring
to the following table.
Table 9 Ambient illuminance and visibility of laser line
Illuminance (lux)
3000 or more
Ambient
conditions
(reference)
Under direct
sunlight of fine
weather
Outdoor
Indoor
3000 or more 3000 - 2500 300 - 200 150 - 80 30 or less800 - 600
Near the window
under cloudy
weather, just
before the
sunset
Ink line is
invisible.
Just before
the sunset in
cloudy
weather
Shaded area
in cloudy
weather
Shaded area
in fine weather
Cloudy
weather
Invisible Visible
Near the
window under
fine weather
Indoor under
fine weather
Near the
window under
cloudy
weather
Indoor under
cloudy
weather
Glaring
(The working environment where the illuminance is 200 luxes or less is dark and difficult to operate the Models
C 12LSH and C 12RSH.)
The laser line is invisible under direct sunlight of fine weather. Prepare a shaded area or relocate to a shaded
area to operate the Models C 12LSH and C 12RSH.
7-6. Precautions Concerning Brake (Except for NZL)
The Models C 12LSH and C 12RSH are equipped with a "brake" that stops running when the switch is turned off.
Normally the operation is stopped in 5 - 6 seconds when the switch is turned off. If it takes 10 seconds or more to
stop, absolutely avoid further use of this machine. In this event, ensure that your customers bring this machine in
their local Hitachi power tools dealer or Hitachi power tools center for servicing.
(1) Be sure to use the carbon brushes dedicated to the Models C 12LSH and C 12RSH (110 V --- 120 V: Code No.
999038, 220 V--- 240 V: Code No. 999065). Use of other carbon brushes will adversely affect the brake
performance.
(2) If the brake should fail to work, check the carbon brushes. Replace the carbon brushes with new ones if their
length is shorter than 6 mm. If the brake still does not work, replace the armature ass'y.
Visible Visible Visible GlaringLaser line
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