3B SCIENTIFIC
®
PHYSICS
1
He-Ne laser U21840
Instruction sheet
01/07 Alf
1 Plug-in power supply
2 Lever for neutral filter
3 Light outlet with thread for
microscope objective
4 Stand
rod
5 Key
switch
6 Indicator
lamp
1. Safety instructions
The He-Ne laser, U21840, emits visible radiation at
a wavelength of 630-680 nm with a maximum
power of less than 1 mW, thus conforming to class
2 regulations as specified in DIN EN 60825-1 “Safety
of lasers”, i.e. the human eye can be protected by
the instinctive reaction to turn away and blink.
•
Do not look straight into the laser beam or any
reflected beam.
•
Lasers should only be operated by trained and
authorised personnel.
•
All those people participating in or observing
an experiment must have been informed of the
dangers inherent in laser radiation and edu-
cated regarding protective measures.
•
Experiments may only be performed using the
minimum power output required in each spe-
cific instance.
•
Ensure that the beam is not directed at eye
level.
•
Use suitable screening to isolate the area
around the laser and avoid unwanted reflec-
tions.
•
Any rooms in which laser experiments take
place should be labelled with warning signs.
•
Observe the regulations valid in the respective
country where the experiment is being per-
formed, e.g. Germany’s health and safety regu-
lations BGV B2 “Laser radiation”, and any
stipulations set by the relevant ministry.
•
Keys should be carefully stored so that they
cannot be accessed by unauthorised persons.
Safe operation of the He-Ne laser is guaranteed,
provided it is used correctly. However, there is no
guarantee of safety if the equipment is used in an
inappropriate or careless manner. If it is deemed
that the equipment can no longer be operated
without risk (e.g. visible damage has occurred), the
laser should be switched off immediately and se-
cured against any unintended use.
•
Before putting the equipment into operation,
check for any signs of damage. In the event of
any malfunction or visible damage, turn off the
laser and put it away so that it cannot be used
unintentionally.
•
Due to internal operating and triggering volt-
ages which can be hazardous to life, never
open the housing.