AN340-EU-EN V1.3 4/13
6
Operation
Power
ON
‐
OFF
1.
Switch
the
meter
ON
by
pressing
the
power
button
momentarily.
2.
Press
again
to
switch
the
meter
OFF.
3.
If
the
meter
does
not
switch
ON,
check
that
the
meter
has
six
(6)
fresh
AAA
batteries
installed
in
the
rear
battery
compartment.
Refer
to
the
battery
installation
section
for
details.
4.
The
meter
can
also
be
powered
using
the
9V
AC
power
adaptor.
The
power
adaptor
connects
to
the
top
of
the
meter
using
the
jack
as
shown
in
the
Description
section
of
this
guide.
Sleep
mode
The
meter
will
automatically
enter
the
sleep
mode
(switch
off)
after
twenty
(20)
minutes
of
inactivity.
To
disable
this
feature:
with
the
meter
OFF,
press
and
hold
the
SET
and
HOLD
buttons
for
two
(2)
seconds.
The
LCD
will
display
'
n
'
as
it
switches
ON.
Now
the
sleep
mode
is
disabled
and
the
user
must
press
the
power
button
momentarily
to
switch
the
meter
OFF.
Measurements
5.
Connect
the
sensor
to
the
jack
at
the
top
of
the
meter
as
shown
in
the
Description
section.
Then
sensor
and
jack
are
keyed
to
ensure
proper
connection.
The
sensor
diameter
is
18mm
(0.7”)
and
the
telescoping
wand
extends
1m
(39”).
6.
With
the
meter
switched
ON,
use
the
MODE
button
to
advance
from
one
measurement
type
to
the
next
(air
velocity,
air
flow
or
volume,
air
temperature,
relative
humidity,
wet
bulb
temperature,
and
dew
point
temperature).
Note
that
for
air
volume
measurements
the
user
must
first
enter
the
area
value
for
the
duct
under
test
before
accurate
readings
can
be
made.
Refer
to
the
AREA
section
of
this
guide
for
programming
details
and
to
the
Appendix
for
additional
information
on
area
measurements,
calculations,
and
unit
conversions.
7.
When
measuring,
air
must
enter
the
vane
on
the
side
of
the
sensor
with
the
printed
words
AIR
IN.
The
sensor
wand
can
be
extended
using
its
telescoping
capability
up
to
1m
(39”).
8.
The
measurement
is
indicated
on
the
upper
display
digits
along
with
the
currently
selected
unit
of
measure.
To
change
the
unit
of
measure,
refer
to
the
SETUP
mode
section.
The
lower
display
line
shows
the
real
time
clock,
alternating
time
and
date
information.
9.
The
air
temperature
and
relative
humidity
sensors
are
located
in
the
slotted
opening
on
the
sensor
wand
below
the
impeller.
10.
Air
velocity
readings
are
indicated
in
meters
per
second
(m/s)
or
feet
per
minute
(fpm).
Temperature
readings
(air,
dew
point,
or
wet
bulb)
are
indicated
in
°C/°F.
Relative
Humidity
is
indicated
in
%.
Air
flow
(volume)
is
indicated
in
CFM
(cubic
feet
per
minute)
or
CMM
(cubic
meters
per
minute).
11.
To
measure
relative
humidity
using
an
offset
reference
value,
please
access
the
Setup
mode
and
input
the
offset
value
as
described
in
the
Setup
mode
section.
The
LCD
will
display
the
measured
value
minus
the
offset
value
once
the
offset
is
programmed
in
the
Setup
mode.
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