AN320-en-GB_V1.2 11/14
4
SET
HOLD
MAX/MIN
U/mode
AVG
▲
L/mode
▼
U/mode
AVG
▲
U/mode
AVG
▲
L/mode
▼
Brief
Keypad
Description
Press
momentarily
to
switch
the
meter
ON
or
OFF.
Press
and
hold
this
button
for
2
seconds
to
enter
or
exit
the
Setup
mode
(refer
to
Setup
mode
section
for
details).
o
Press
momentarily
to
freeze
the
displayed
reading
(HOLD
icon
switches
ON);
press
again
momentarily
to
exit
the
HOLD
mode
(HOLD
icon
switches
OFF)
o
Press
and
hold
for
2
seconds
to
display
the
MIN
(minimum)
reading;
press
and
hold
again
to
display
the
MAX
(maximum)
reading;
Press
and
hold
a
third
time
to
exit
o
This
button
is
also
used
in
the
AVERAGE
mode
(for
recording
readings
one
at
a
time
or
for
a
‘timed’
recording
session)
and
in
the
SETUP
mode
(for
configuring
the
meter).
Please
review
the
AVERAGE
and
SETUP
mode
sections
for
details
Press
momentarily
to
toggle
between
ppm
(CO
2
),
humidity,
and
air
velocity
readings.
Press
and
hold
for
2
seconds
to
access
the
Multi
‐
Point
Average
and
Timed
Average
modes
(the
AVG
icon
switches
ON).
Detailed
instructions
for
these
modes
are
provided
later
in
this
guide.
In
the
Setup
mode
press
to
select
a
category
or
to
increase
a
value
(refer
to
Setup
mode
later
in
this
guide)
Press
to
toggle
the
lower
display
between
air
temperature,
air
volume,
wet
bulb
temperature,
and
dew
point
temperature
readings;
Also
used
in
the
Multi
‐
Point
Average,
Timed
Average,
and
Setup
modes;
refer
to
the
AVERAGE
and
SETUP
modes
sections
later
in
this
guide
+
With
the
meter
switched
OFF,
press
and
hold
these
two
buttons
to
disable
Auto
Power
OFF.
Detailed
AUTO
POWER
OFF
(Sleep
mode)
instructions
are
provided
later
in
this
guide
+
+
Press
all
3
buttons
simultaneously
to
enter
the
Calibration
mode.
Calibration
instructions
are
provided
in
detail
later
in
this
guide
