Crown CT44048 MC Original Instructions Manual page 18

Switching on / off
Switching on:
Set the lock 6 to the position shown in figure 8.1. It
will unlock suspension gear of the laser head and turn
on the power� If the appliance is installed with a slope
of more than ±3°, you will hear an audible signal� By
pressing buttons 3 and 4 you can switch on or switch
off laser beams�
Switching off:
Set the lock 6 to the position shown in figure 8.2. It
will lock suspension gear of the laser head and turn
off the power�
Design features
Laser head self-levelling system (see fig. 4, 8)
Laser head self-levelling system makes laser measure-
ment possible, if the appliance is put on an inclined or
uneven surface (inclination angle not exceeding ±3°)�
If maximum possible inclination angle is exceeded,
laser beams start blinking; the appliance gives an
acoustic signal� In this case, it is necessary either to
reinstall the appliance on a more even place, or (when
installing the appliance on universal holder 14) to align
the position of the appliance with screw 19 (according
to the bubble level 18 (see fig. 4)).
Attention: if the appliance is moved dur-
ing use, lock the laser head during stor-
age and transportation (set lock 6 to the
position shown in fig. 8.2).
Circular planes projection
When laser beams get on a cone-shaped wedge, they
are projected at 360°, forming a circular laser plane�
It allows you to make a circular level marking quickly
and accurately without turning the appliance body�
Moreover, the design features allow you to install the
appliance very close to the walls or ceiling�
Button "OUT"
The "OUT" button is designed to enable operation in
bright conditions (for example, in bright sunlight)�
Also, to work in this mode, it is recommended to use a
special laser receiver or laser glasses (not supplied)�
• To turn on the outdoor mode, press the "OUT" button�
• To turn off the outdoor mode, press the "OUT"
button again�
Universal holder (see fig. 2-7)
The universal holder 14 allows you to install the
appliance on various objects, and to change the
position of the appliance easily, quickly and accurately
(move, turn)�
Working advice
Precision test
The appliance is ready for operation.
The accuracy of the appliance has been
verified at the factory.
If measurement error exceeds maximum al-
lowable variance during the precision test,
please contact CROWN service centre.
Factors, influencing appliance precision:
• Ambient temperature, e�g�, temperature differ-
ence which may take place with distance from the
ground� Temperature difference is most consider-
able near ground surface, therefore it is recom-
mended to use the tripod for measurements in areas
with length exceeding 20 m�
• Contamination of the laser emitter window� Al-
ways check protective windows for contaminations
before use and clean them if necessary�
• Measurement through transparent surfaces (win-
dows, aquariums, etc�)� It is not recommended to
carry out such measurement�
• Measurements on reflective surfaces (mirrors,
polished metal surfaces, etc�)� It is not recommend-
ed to carry out such measurement�
• Presence of steam, dust, smoke, etc� in the air�
It is not recommended to carry out such measure-
ment�
• Fall of the appliance or a heavy shock� In this
case it is recommended to perform a precision test�
If maximum allowable variance is exceeded, please
contact CROWN service centre�
General recommendation (see fig. 8)
• Before starting work ensure that all measurements
will be carried out under suitable conditions (see sec-
tion "Factors, influencing appliance precision").
• Install the appliance correctly as described above�
It is recommended to use the universal holder 14
or to install the appliance on a suitable tripod (not
supplied)� Negligible horizontal misalignment can be
compensated with the laser head self-levelling system
(not exceeding ±3°)�
• Turn on the appliance as described above� If you
turn on the appliance with a laser head self-levelling
on and hear an acoustic signal, and the laser beams
blink, you have to re-position the appliance, otherwise
the measurement results will be incorrect�
• After finishing work turn off the appliance as de-
scribed above (lock 6 shall be in the position as shown
in fig. 8.2 and laser beams must be off).
• It is recommended to put the appliance for long-term
storage and transportation into case 15� Ensure that
there are no moisture drops on the appliance elements
(if necessary, wipe with a soft cloth), after that put the
appliance into case 15�
Maintenance / preventive measures
Cleaning the appliance
• Keep the appliance clean� Do not use caustic sub-
stances or solvents�
• Emitter windows shall be cleaned with a soft cloth�
Do not use sharp objects or corrosive agents for this
purpose�
After-sales service and application service
Our after-sales service responds to your questions
concerning maintenance and repair of your product as
English
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