times.
After the battery is completely charged, the charger will switch over to trickle charging. This
will expand the lifetime of the battery beyond 500 charge cycles. If the unit is used for more
than 8 hours a day, it is recommended that user carry a second battery for backup.
Batteries may be charged on or off the unit.
3.1.4 Filter assembling
Open
the
front
cover
by
releasing
t
he
retaining
clip
on
the
side
of
the
unit
by
hand
(do
not
use
tools).
Fit
the
filter
squarely
into
the
power
unit
by
aligning
the
three
concave
points
of
the
filter
box
to
the
three
convex
points
in
the
cavity.
Then
press
the
filter
hard
and
rotate
a
small
angle
clockwise
to
lock.
To
unlock
the
filter
,
press
it
and
rotate
anticlockwise.
When
air
flow
alarm
is
caused
by
blockage
of
filter,
it
should
be
replaced
in
time.
Spare
filters
must
be
supplied
by
the
manufacturer.
The
pre-filter
and
the
activated
carbon
filter
should
be
installed
on
the
inner
side
of
the
upper
cover,
assembled
in
the
order
and
direction
indicated
in
Figure
1,
and
then
pressed
by
the
frame.
Three
notches
on
the
frame
are
aligned
with
three
buckles
on
the
top
cover.
Press
the
frame
and
rotated
clockwise
to
lock.
To
disassemble
them,
press
the
frame
and
rotated
anticlockwise
to
unlock.
3.2Switching on
The unit can be switched on by pushing the ON/OFF button for about three seconds. A voice
signal will be heard and the LCD will display the real statuses of air flow, filter and the battery
power. Then the unit will run on the low flow level. The flow digit on LCD will be stable in
about 30 seconds after adjusting to each air flow level.
3.3During use
This product has three levels of air flow. By shortly pressing the " SET" button, the flow level
will change according to "low - medium - high - low..." circulation accompanied by a voice
signal. The icon on LCD also changes synchronously. At the same time, the digit on LCD
indicates the real air flow rate. If during use the air supply drops or fails entirely, leave the
work area immediately. If a signal for low battery (2 beeps repeatedly ) or a clogged filter
element is given(a single short beep repeatedly), leave the workroom immediately, and check
according to chapter 6.
3.4After use
By pressing the ON/OFF button for 3 seconds, the motor will stop gradually accompanied by a
long tweet. When the icons on LCD disappeared after about 15 seconds, the apparatus will
turn off completely.
Cleaning and disinfecting
After each session clean the unit, using a mixture of water and a mild detergent.
Subsequently, rinse thoroughly with clean water. Do not use any solvent. During cleaning
ensure that no water is allowed to enter the apparatus. The unit must not be immersed in fluid.
Dry the unit with a cloth and/or leave it to dry in the open air.
Advice
For reasons of hygiene each operator should be equipped with his/hers own hood or mask.
