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2172-11
Backlight Precautions
• The electro-luminescent panel that provides illumination loses power after
very long use.
• The illumination provided by the backlight may be hard to see when viewed
under direct sunlight.
• The watch will emit an audible sound whenever the display is illuminated. It
does not indicate malfunction of the watch.
• The backlight automatically turns off whenever an alarm sounds.
• The backlight illuminates the display for about three seconds in the Diving
Mode, and for about two seconds in other modes.
• The backlight may not turn on immediately after a sensor measurement in
the Diving Mode.
Auto light switch precautions
• Avoid wearing the watch on the inside of your wrist or on your diving
equipment. Doing so causes the auto light switch to operate when it is not
needed, which shortens battery life. If you want to wear the watch on the
inside of your wrist, turn off the auto light switch feature.
• The backlight may not light if the face of the
watch is more than 15 degrees above or
below parallel. Make sure that the back of
your hand is parallel to the ground.
• The backlight turns off in about two seconds
(three seconds in the Diving Mode), even if
you keep the watch pointed towards your
face.
More than 15 degrees
too above
• Static electricity or magnetic force can interfere with proper operation of the
auto light switch. If the backlight does not light, try moving the watch back
to the starting position (parallel with the ground) and then tilt it back toward
you again. If this does not work, drop your arm all the way down so it
hangs at your side, and then bring it back up again.
• Under certain conditions, the backlight may not light until about one second
after you turn the face of the watch towards you. This does not necessarily
indicate malfunction of the backlight.
Calibrating the Temperature Sensor
The temperature sensor of this watch is calibrated at the factory before
shipment and further adjustment is normally not required. If you notice
serious errors in the temperature readings produced by the watch, you can
calibrate the sensor.
Important!
Incorrectly calibrating the temperature sensor can result in incorrect readings.
Carefully read the following before doing anything.
• Compare the readings produced by the watch with those of another
reliable and accurate thermometer.
• If adjustment is required, remove the watch from your wrist and wait for 20
or 30 minutes to give the temperature of the watch time to stabilize.
• Performing temperature calibration while in water of stable temperature
produces more accurate calibration.
To calibrate the temperature
1. Use C to enter the Timekeeping Mode.
2. Hold down A until the seconds digits start
to flash, which indicates the setting screen.
3. Press A again to move the flashing to the
temperature setting.
4. Each press of D increases the displayed
temperature by 0.1°C (or 0.2°F) while
pressing B decreases it.
• You can calibrate the temperature displayed in step 3 within a range of
±10.0°C (18.0°F).
• Pressing B and D at the same time returns to the factory calibration.
5. Press A to exit the setting screen.
300
To change the unit of temperature measurement
1. Use C to enter the Timekeeping Mode.
2. Hold down A until the seconds digits start
to flash, which indicates the setting screen.
3. Press C 10 times to move the flashing to
the temperature unit setting (°C or °F).
4. Press D toggle between the two settings.
5. Press A twice to exit the setting screen.
Troubleshooting Guide
Problem: Inaccurate depth readings
❑ Make sure you enter the Diving Mode just before starting your dive.
If you change to another mode while submerged, reset the depth again
when you surface. (See “
0.0 l (0 F) Reset”)
❑ Was the watch exposed to temperature extremes?
Be especially careful about exposing the watch to direct sunlight during the
summertime. (See “Pressure Measurement Precautions”)
❑ Did you drop the watch or subject it to strong impact?
Subjecting the watch to abnormally strong impact can cause it to
malfunction or fail to operate entirely. When this happens, contact an
authorized CASIO Dealer/Distributor to arrange for repair by an authorized
CASIO Service Point.
❑ Are you diving in fresh water?
This watch bases its calculations on seawater, so fresh water diving
produces incorrect depth readings. (See “High-altitude Diving/Fresh-water
Diving”)
Problem: Inaccurate temperature measurements
❑ The temperature value displayed by the watch represents the temperature
of the watch itself. (See “About Temperature Measurements”)
Problem: Log data is not stored in Log Memory
❑ Have your dives been unusually short?
Make sure your dives are Valid Dives. (See “Valid Dives and Invalid
Dives”)
❑ Did the RECOVER or BATT message or a sensor error occur while
you were diving?
Low battery (See “Low Battery Warning”) and sensor error (See “Sensor
Errors”) conditions can cause data to be lost or can disable the recall
function.
When you exit the Diving Mode to the Timekeeping Mode (which stores dive
data in memory) while RECOVER or BATT is on the display, the dive end
time and dive time are shown as x:xx. Also, the Compartment Nitrogen
Loading Graph and Dive Profile Graph are not displayed in this case.
Problem: Display shows a depth greater than
00
00
0.
11
11
1
ll
ll
l (
44
44
4
FF
FF
F) even though
you are on the surface.
❑ Correctly perform the
0.0 l (0 F) reset procedure. (See “0.0 l (0 F)
Reset”)
❑ Temperature extremes, especially cold, can cause depth measurement
error. (See “Depth Reading Errors”)
Problem: Dive time shown in the Log Memory data in the Recall Mode
does not match the difference between the dive start time and
end time.
❑ The dive start and end trigger depth is 1 meter (4 feet), so time you spend
above that depth is not counted as part of the dive. (See “Dive Time
Calculation”)
Problem: The alarm and Hourly Time Signal do not sound.
❑ The alarm and Hourly Time Signal are disabled in the Diving Mode and
when battery power is low.
Problem: Backlight does not operate.
❑ Have you over-used the backlight?
Frequent use of the backlight can cause it to become temporarily disabled.
(See “Low Battery Warning”)
❑ Did you drop the watch or subject it to strong impact?
If so, contact an authorized CASIO Dealer/Distributor as soon as possible
to arrange for repair by an authorized CASIO Service Point.
❑ Does this happen while you are diving?
The backlight temporarily goes off in the Diving Mode if a depth
measurement starts taken during the three seconds that the light is lit.
Problem: Cannot display Log Memory data or Dive Profile data
❑ Display of Log Memory and Dive Profile data is disabled while the
RECOVER or BATT indicator is on the display. (See “Low Battery
Warning”)