Relative Standards; Laser Marker - Hitachi C 12LSH Technical Data And Service Manual

7-3. Relative Standards

Standards, regulations and guidelines for the safe use of laser equipment
[The U.S.A.]
There is standard "Complies with 21 Code of Federal Regulation (21 CFR), Chapter 1, Subchapter J, Part 1010
and 1040" established by the Center for Devices and Radiological Health (CDRH) of the Food and Drug
Administration (FDA). Standards, regulations and guidelines of the other countries are under investigation.

7-4. Laser Marker

The Models C 12 LSH and C 12RSH are equipped with the laser marker that complies with the Class II
requirements of the standard specified in "7-3. Relative Standards". The Class II laser is defined as follows:
The laser power is low and it is safe by the protective measures such as blinking.
However, it is dangerous if the operator's eyes are exposed directly to the laser for a protracted period.
The operator can use the laser equipment without particular training and instruction.
The amount of light exposure (output) is 1 mW or less at the position where the operator can be exposed to
the laser radiation during operation. (This is in the case of the U.S.A. The measuring methods and the output
values are different depending on the standards.)
Wave length (nm)
> 400
I
< 710
The saw blade unit prevents access of the operator's eye to the laser-emitting aperture less than 65 mm.
In addition, the amount of light exposure (output) is 1 mW or less (about 0.4 mW) at this position. Thus the
Models C 12LSH and C 12RSH satisfy the Class II requirements adequately. There is no ill effect on the
operator's body if looking at the laser line on the workpiece during operation.
CAUTION: (1) Be sure to disconnect the power cord plug from the receptacle before removing the
laser marker for repair. If it is unavoidable to check the operation of the removed
laser marker with the power turned on, face the laser emitting aperture to the ground
to show the laser line on the ground.
(2) Laser radiation when open. DO NOT STARE INTO BEAM OR VIEW DIRECTLY WITH
OPTICAL INSTRUMENTS.
The life span of the laser marker in the Models C 12LCH and C 12RSH is about 3,600 hours. (About 3 years:
5 hours of use/day x 240 days/year)
Emission duration (s)
-1
> 2.5 x 10
Table 9
Class II accessible emission limit
(Threshold value)
-3
1.0 x 10
--- 18 ---
(Unit)
(Amount)
Radiant power
W