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▶ Keep laser tools out of reach of children.
▶ Check the accuracy of the PLT 300 before using it to make measurements.
▶ Use of setting-up / adjusting devices and equipment or operating procedures other than those specified
in these instructions may lead to exposure to hazardous radiation.
▶ Due to the principle employed, the results of measurements may be negatively affected by the
surrounding conditions. This includes, e.g. close proximity to equipment that generates powerful
magnetic or electromagnetic fields, taking measurements from unsuitable surfaces and use of
unsuitable reflectors.
▶ Measurements to plastic foam surfaces, e.g. polystyrene foam, to snow or to highly reflective surfaces,
etc. may result in incorrect readings.
▶ Measurements taken to surfaces with low reflectivity in highly reflective surroundings may be inaccurate.
▶ Measurements taken through panes of glass or other objects may be inaccurate.
▶ The measurement may be incorrect if the conditions under which the measurement is taken change
rapidly, e.g. due to people walking through the path of the laser beam.
▶ Do not point the PLT 300 or accessories toward the sun or other powerful light sources.
▶ Check the PLT 300 before taking important measurements or after it has been dropped or subjected to
mechanical effects such as impact or vibration.
▶ When switching distance measuring mode from prism measurement to reflectorless measurement, make
sure that no one can look into the lens of the PLT 300.
▶ The PLT 300 may not be used in the proximity of medical instruments.
▶ Use of the PLT 300 in the proximity of expectant mothers or persons with a cardiac pacemaker is
not permissible.
▶ Operation of the PLT 300 in the proximity of military installations, airports or radio astronomy
facilities is not permissible unless prior permission has been obtained.
▶ Keep the PLT 300 clean and dry at all times.
2.1.2
Proper preparation of the working area
▶ Secure the area in which you will be taking measurements. Make sure that the laser beam is not
directed toward other persons or toward yourself while setting up the PLT 300.
▶ Check that the tripod stands securely and that the PLT 300 is firmly attached to the tripod by the
mounting screw.
▶ Use the PLT 300 only within the defined application limits, i.e. do not take measurements from mirrors,
stainless steel surfaces or polished stone, etc.
▶ Observe the accident prevention regulations applicable in your country.
2.1.3
Electromagnetic compatibility
Although the tool complies with the strict requirements of the applicable directives, Hilti cannot exclude the
following possibilities:
•
The tool may cause interference to other devices (e.g. aircraft navigation equipment).
•
The tool may be negatively affected by powerful electromagnetic radiation, possibly leading to incorrect
operation.
In these cases, or if you are otherwise unsure, confirmatory measurements should be made by other means.
2.1.4
Working safely with laser tools
The PLT 300 conforms to Laser Class 2 based on the IEC60825-1 / EN60825-1:2007 standard and complies
with CFR 21 § 1040 (Laser Notice 50).
▶ Do not stare into the beam and do not direct the beam toward other persons. In the event of direct eye
contact with the laser beam, close your eyes and move your head out of the path of the beam.
▶ Laser Class 2/Class II tools may be operated only by appropriately trained persons.
▶ Laser beams should not be projected at eye height.
▶ Precautions must be taken to ensure that the laser beam does not unintentionally strike highly reflective
surfaces.
▶ Precautions must be taken to ensure that persons do not stare directly into the beam.
▶ The laser beam must not be allowed to project beyond the controlled area.
▶ Switch the laser tool off when it is not in use.
▶ When not in use, laser tools should be stored in a place to which unauthorized persons have no access.
▶ Have the PLT 300 and PLC 300 repaired only by Hilti Service. If the PLT 300 is opened improperly,
laser radiation in excess of Class 2 may be emitted.
4
English
Printed: 31.01.2018 | Doc-Nr: PUB / 5245389 / 000 / 01
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