EXTECH
INSTRUMENTS
2
CTH10A
‐
en
‐
GB_V2.3
10/15
Introduction
Thank
you
for
selecting
the
Extech
Model
CTH10A
Radio
Controlled
Clock
with
Hygro
‐
Thermometer
displays.
The
CTH10A
is
a
real
‐
time
calendar
Clock
(12/24
hour)
that
also
displays
temperature
and
relative
humidity
measurements
taken
from
its
internal
environmental
sensors.
The
clock
can
be
set
manually
or
automatically
using
the
RC
‐
WWVB
time
signal.
The
CTH10A
includes
an
audible/visible
daily
alarm
function
with
‘snooze’
mode.
This
device
is
shipped
fully
tested
and
calibrated
and,
with
proper
use,
will
provide
years
of
reliable
service.
Please
visit
our
website
(www.extech.com)
to
check
for
the
latest
version
of
this
User
Guide,
Product
Updates,
Product
Registration,
and
Customer
Support.
Meter
Description
A1:
RC
‐
WWVB
time
signal
Icon
A2:
Time
Display
A3:
Date
A4:
Day
of
Week
A5:
Indoor
Humidity
A6:
Indoor
Temperature
B1:
‘Snooze’
Button
B2:
‘MODE/SET’
Button
B3:
‘+
12/24’
Button
B4:
‘
‐
C/F
’
Button
B5:
‘RESET’
Button
B6:
‘AL
ON/OFF’
Button
C1:
Wall
Mount
Hole
C2:
Battery
compartment
C3:
Tilt
Stand
