AN310-en-GB_V1.5 11/15
7
Relative
Humidity,
Wet
Bulb,
and
Dew
Point
Measurements
The
relative
humidity
sensor
is
built
in
to
the
center
of
the
vane
(rear
of
meter)
and
can
be
used
to
measure
relative
humidity,
dew
point
and
wet
bulb
temperatures.
1.
Press
U/mode
to
switch
to
the
%RH
display
if
necessary.
The
measured
humidity
readings
will
be
displayed
on
the
upper
LCD
digits.
2.
Use
the
L/mode
button
to
scroll
through
air
temperature,
dew
point
temperature,
wet
bulb
temperature,
and
air
volume
readings.
3.
To
measure
the
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.
Data
Hold
Mode
1.
Press
the
HOLD
button
from
the
normal
operating
mode
to
freeze
the
current
measurement.
2.
The
‘HOLD’
icon
will
appear
at
the
top
of
the
LCD
display.
3.
Press
HOLD
again
to
return
to
normal
operation.
The
‘HOLD’
icon
will
switch
OFF
and
the
meter
will
return
to
displaying
readings
in
real
time.
MAX/MIN
Mode
The
MAX
‐
MIN
feature
records
the
highest
(MAX)
and
lowest
(MIN)
readings
captured
since
the
MAX
‐
MIN
mode
was
accessed.
1.
Press
and
hold
the
MAX/MIN
button
for
2
seconds
to
begin
displaying
the
lowest
(minimum)
readings
encountered
since
this
mode
was
accessed.
The
‘MIN’
icon
will
appear
at
the
top
of
the
LCD
display
indicating
that
the
readings
shown
are
the
lowest
measured.
2.
Press
and
hold
the
MAX/MIN
button
again
for
2
seconds
to
display
the
maximum
readings
encountered.
The
‘MAX’
icon
will
appear
on
the
LCD.
3.
Press
and
hold
this
button
again
for
2
seconds
to
return
to
the
normal
mode
of
operation
(the
‘MIN’
and
‘MAX’
icons
should
switch
OFF).
4.
While
viewing
the
MAX
or
MIN
data,
use
the
L/mode
button
to
switch
the
display
so
that
the
Air
Volume
MIN
and
MAX
readings
can
be
viewed
also.
5.
Press
and
hold
MAX/MIN
for
2
seconds
to
return
to
the
normal
operation
mode.
Multi
‐
Point
Average
Mode
1.
From
the
normal
operating
mode
press
the
U/mode
button
for
2
seconds
to
enter
Multi
‐
Point
Average
mode
(the
AVG
display
icon
and
the
associated
black
dot
•
will
switch
ON).
2.
Press
the
HOLD
button
momentarily
to
record
one
reading.
The
upper
display
digits
will
show
the
reading’s
memory
location
number
and
the
lower
display
will
show
the
measured
value.
Press
the
HOLD
button
again
to
take
and
store
another
reading;
the
memory
location
number
will
increment
by
one
and
the
current
reading
will
be
stored
in
this
new
memory
location.
The
meter
can
store
up
to
19,999
points
in
memory.
3.
Press
U/mode
momentarily
to
see
the
multi
‐
point
mean
(average)
for
all
of
the
readings
recorded
during
the
session
(the
'•AVG'
display
icon
will
flash
during
this
process).
4.
Press
L/mode
to
view
the
average
reading
for
the
other
available
parameters.
5.
Press
U/mode
momentarily
to
return
to
the
normal
operating
mode.
