Operation; Maintenance; Optional Accessories; Ec Declaration Of Conformity - Makita DVR850 Instruction Manual

OPERATION

Hold the tool straight when inserting/operating. Use the
tool within the effective vibration range at equidistant
intervals. The effective air bubble removal range is about
ten times the diameter of the vibrating head, or around
250 mm.
Do not use this tool to move concrete within a form. The
mortar will just move away and the coarse aggregate will
remain, causing segregation. (Fig. 5)
Effective leveling and removal of air bubbles
Removal of the air bubbles is complete after you have
worked the tool throughout each effective range, the con-
crete stops shrinking, and the mortar has risen evenly to
the surface, giving off a light appearance. Gently remove
the operating tool not to leave holes.
NOTE:
• Vibrating too long in a single place causes concrete
segregation.
• When the coarse aggregate segregates when placing
concrete, shovel out the coarse aggregate and put it
where there is plenty of mortar. Then use the tool on it.
Don't leave coarse aggregate in the segregated condi-
tion.
When concreting a slope site, always pour from the bot-
tom at the beginning. This way the weight of the freshly
poured concrete and vibration will lead to effective
removal of air bubbles. Conversely, if the pouring is done
first from above, the mortar will separate and eventually
slide to the bottom. (Fig. 6)

MAINTENANCE

CAUTION:
• Always be sure that the tool is switched off and the bat-
tery cartridge is removed before attempting to perform
inspection or maintenance.
• Never use gasoline, benzine, thinner, alcohol or the
like. Discoloration, deformation or cracks may result.
To maintain product SAFETY and RELIABILITY, repairs,
any other maintenance or adjustment should be per-
formed by Makita Authorized Service Centers, always
using Makita replacement parts.

OPTIONAL ACCESSORIES

CAUTION:
• These accessories or attachments are recommended
for use with your Makita tool specified in this manual.
The use of any other accessories or attachments might
present a risk of injury to persons. Only use accessory
or attachment for its stated purpose.
If you need any assistance for more details regarding
these accessories, ask your local Makita Service Center.
• Makita genuine battery and charger
NOTE:
• Some items in the list may be included in the tool pack-
age as standard accessories. They may differ from
country to country.
Noise
The typical A-weighted noise level determined according
to EN60745:
Model DVR350
Sound pressure level (L
Uncertainty (K): 3 dB (A)
The noise level under working may exceed 80 dB (A).
Model DVR450, DVR850
Sound pressure level (L
Uncertainty (K): 3 dB (A)
The noise level under working may exceed 80 dB (A).
Wear ear protection
Vibration
The vibration total value (tri-axial vector sum) determined
according to EN60745:
Model DVR350
Work mode: operation without load
Vibration emission (a
Uncertainty (K): 1.5 m/s
Model DVR450, DVR850
Work mode: operation without load
Vibration emission (a
Uncertainty (K): 1.5 m/s
• The declared vibration emission value has been mea-
sured in accordance with the standard test method and
may be used for comparing one tool with another.
• The declared vibration emission value may also be
used in a preliminary assessment of exposure.
WARNING:
• The vibration emission during actual use of the power
tool can differ from the declared emission value
depending on the ways in which the tool is used.
• Be sure to identify safety measures to protect the oper-
ator that are based on an estimation of exposure in the
actual conditions of use (taking account of all parts of
the operating cycle such as the times when the tool is
switched off and when it is running idle in addition to
the trigger time).

EC DECLARATION OF CONFORMITY

For European countries only
The EC declaration of conformity is included as Annex A
to this instruction manual.
ENG905-1
): 74 dB (A)
pA
): 70 dB (A) or less
pA
ENG900-1
2
): 3.0 m/s
h
2
2
): 2.5 m/s or less
h
2
ENG901-1
7