Model CTH10 - Extech Instruments

User's Guide
Model CTH10
SELECT THE TIME ZONE
USING THE ALARM AND SNOOZE FUNCTION
Make sure the time zone is set to appropriate location. The default time zone is
Pacific zone. If your location is not the Pacific zone, do the following:
1. In the normal time mode, press the MODE key to enter the alarm time mode.
2. Press the SET key to select the proper time zone. P=Pacific, M=Mountain,
C=Central, E=Eastern
1.
DAYLIGHT SAVINGS TIME (DST)
RADIO CONTROLLED CLOCK
with TEMPERATURE & HUMIDITY
The clock has been programmed to automatically switch when daylight savings
time is in effect. Your clock will show ‘DST’ during the summer.
GETTING STARTED
The signal indicator displays signal strength in 3 levels. Wave segment flashing
means time signals are being received. The signal quality could be classified into
three types:
1.
2.
Remove the battery door by releasing the battery cover latch.
Insert four new AA size batteries as per indication marked on the battery
compartment.
3. Once the batteries are inserted, all the segments of the LCD will show
briefly before entering the radio controlled time reception mode.
4. The RC Clock will automatically start scanning for the radio controlled
time signal after 10 seconds.
5. The default time zone is Pacific zone. If you are in this time zone,
changing is not required. Otherwise, change to the correct time zone (Refer
to ‘Select the Time Zone’.)
Note: If there is no display on the LCD after inserting the battery, replace with four
new batteries or press RESET key by using a metal wire. In some cases,
you may not receive a signal immediately. Due to atmospheric
disturbances, the best reception often occurs during night time.
FUNCTION KEYS
1. RESET:
2. MODE:
3. SET:
4. ADJUST:
5. °C/°F:
6. YEAR:
7. SNOOZE:
In case of malfunction after insert
of battery, use a pin to
press the RESET key
to restart the clock.
Switch between Normal
Time Mode and Alarm
Time Mode.
In editing mode, step the setting items.
In normal time mode, toggle between Date & Month and Year
display. In normal time setting mode, change the setting value. In
Alarm time mode, switch ALARM/SNOOZE function ON/OFF.
Press it once to toggle between °C and °F format. Press
and hold it for 3 seconds to receive the signal for reception
testing.
In normal time mode, toggle between Date & Month and year display.
Stop the current RC reception or stop the alarm sound during its
activation.
DISPLAYS SYMBOLS
Normal Time Mode
1. Time
2. Month
3. Date
4. Day of the week
5. Temperature
6. Humidity
7. Signal Strength Indicator
8. Daylight Savings Time (DST)
9. Time zone map
SIGNAL STRENGTH INDICATOR
Poor
Acceptable
Excellent
If the RC clock receives signal successfully, a Sync-time symbol appears on LCD.
The unit has already received the time signal. Otherwise, the signal strength
symbol will disappear from the LCD display.
Note:
1. You may use the RECEIVE button to receive the time signal manually. Be
caution of using the RECEIVE mode. The receive mode will be off
automatically after 6-12 minutes. Receive mode consumes more battery
power and reduces battery life.
2. In an environment with radio frequency interference, the unit may not maintain
the communication link and will resume to normal when interference stops.
3. Pressing SNOOZE key for 8 seconds can stop the current RC reception.
MANUALLY SETTING THE TIME AND DATE
If the clock does not receive the time signal successfully, you can set the time
manually. As soon as the transmitter is received again, the clock will
automatically synchronize with the received time.
1. Press and hold “SET” key for 2 seconds until HOUR digit flashes.
2. Press “ADJUST” key to increase the value of the flashing digit.
3. Press “SET” key again to step the setting items.
The sequence is: Hour > Minute > Second >12/24 HR > Month > Date > Year >
Day Language
4. Press the ADJ key to select the day language: GB=English, FR=French,
DE=German, ES=Spanish, IT=Italian
5 Press “MODE” key to exit the setting mode.
Alarm Time Mode
1.
2.
3.
4.
Alarm time
Alarm mode
Snooze icon
Alarm icon
SETTING THE ALARM
1.
2.
3.
4.
5.
In the Normal Time Display, press “MODE” key to enter the Alarm Time
Mode.
Hold “SET” key for 2 seconds until HOUR digit flashes.
Press “ADJUST” key to increase the alarm hour value.
Repeat the above operation to set the alarm minute.
Press “MODE” key to exit the setting mode.
Set the Alarm time as described in the previous section.
2.
Activate the Alarm by pressing the “ADJUST” key so that the bell icon “
“
appears.
3. Activate the Snooze by pressing the “ADJUST” key so that the snooze icon
“Zz” appears.
4. To de-activate the alarm and snooze function, press the “ADJUST” key
until both icons disappear.
Note:
When the snooze function is activated, the alarm will automatically start again
after 4 minutes, total 4 times. It won’t sound again until the next day.The
alarm duration is 60 seconds.
BATTERY REPLACEMENT
When the LCD becomes dim, replace with four new AA size batteries at once.
Pay attention to the battery polarity.
Note: Attention! Please dispose of used unit and batteries in an
ecologically safe manner.
IMPORTANT
For best reception, please read the following instructions:
1. This sophisticated instrument will automatically receive the time signal
transmits from the American Atomic Clock transmitter.
2. It is strongly recommended to start this clock at night and allow the clock to
receive the signal automatically overnight.
3. Always place the unit away from interfering sources such as TV set,
computer, etc.
4. Avoid placing the unit on or next to metal surfaces.
5. Closed area such as airport, basement, tower block, or factory is not
recommended.
6. Do not start reception while moving in a vehicle or train.
SPECIFICATIONS
Measurement Range
Accuracy
23°F to 32°F (-5°C to 0°C)
±3°F (±1.5°C)
33°F to 86°F (1°C to 30°C)
±2°F (±1°C)
87°F to 122°F (31°C to 50°C)
±3°F (±1.5°C)
Humidity
20% to 40% RH
±8% RH (@25°C)
41% to 70% RH
±6% RH (@25°C)
71% to 90% RH
±8% RH (@25°C)
Storage Temperature:
-4°F to 140°F (-20°C to 60°C)
Dimensions:
11.4x17x11.8” (29x43x30cm)
Weight:
2.75lb (1.25kg)
Temperature
WARRANTY
EXTECH INSTRUMENTS CORPORATION warrants this instrument to be free of defects in parts
and workmanship for one year from date of shipment (a six month limited warranty applies to
sensors and cables). If it should become necessary to return the instrument for service during or
beyond the warranty period, contact the Customer Service Department at (781) 890-7440 ext.
210 for authorization or visit our website www.extech.com for contact information. A Return
Authorization (RA) number must be issued before any product is returned to Extech. The sender
is responsible for shipping charges, freight, insurance and proper packaging to prevent damage
in transit. This warranty does not apply to defects resulting from action of the user such as
misuse, improper wiring, operation outside of specification, improper maintenance or repair, or
unauthorized modification. Extech specifically disclaims any implied warranties or merchantability
or fitness for a specific purpose and will not be liable for any direct, indirect, incidental or
consequential damages. Extech's total liability is limited to repair or replacement of the product.
The warranty set forth above is inclusive and no other warranty, whether written or oral, is
expressed or implied.
CTH10 V1.0 3/07