Setting Guide for Eco Drive
Movement Caliber B740 / B741
Contents
(click on a topic)
1. Outline
2. Specifications
3. About Solar Powered Watches
4. Handling the Watch
a) Name of Parts
b) Warning Functions of This Solar Powered Watch
c) Time Required for Charging
d) Special Care for This Solar Powered Watch
e) Switching Between Modes
f) Adjusting the Time and Date (Time Mode)
g) Diving Mode
h) Chronograph Mode
i) Measure Against Possible Problems
j) Setting Function Hand at ‘0’ Position
k) All Reset / Adjusting Hand Position
5. Relationship Between Charge Level Indication and
Running Period of Watch
6. Note on the Eco Drive Manganese Titanium Rechargeable Battery
7. Precautions for Diving
8. Care of your Watch
i
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1. OUTLINE
This watch is an analog solar powered diver's watch into which an electronic
depth meter and chronograph function and chronograph function are built. The
solar power generation function transforms solar energy into electrical energy
to run the watch.
• Since solar energy is used as the power source of this watch, it has no need
of regular replacement of the battery unlike the general diver's watches
using the mercury cell, etc. (Solar power function)
• The built-in depth meter function automatically measures the depth in diving
with the watch worn on the wrist. (Depth meter function)
• The maximum depth in diving is automatically memorized. (Maximum depth
memorizing function)
• The chronograph function measures the time in units of one second for
50
minutes at maximum.
2. SPECIFICATIONS
Movement Caliber NO.
Type
B740M / B741 M
Analog solar power watch
Watch Accuracy (At normal
temperature)
Depth gauge accuracy
Operating temperature
Display
functions
Time
Calendar
Chronograph
Depth gauge
±15 sec/month (5'C-35OC/41"F-95"F)
At depth of 1 to 1 Om/5.0 to 25.Oft: within ± 1
m/±5.Oft
At depth of 1 to 1 to 50m/27.5 to 125.Oft: within
±2m/±7.5ft
On the condition that the water temperature is
constant and error in reading is excluded.
Temperature range for guaranteed accuracy: +10'C to
40'C/50'F to 104OF
Depth gauge accuracy is influenced by changes in
surrounding temperature.
-1OC to +60OC/14F to 40F
Hour, Minute, Second, 24-hour, Charge level
Date
Minute, Second (50-minute system)
1 m to 50m/5ft to 1 25ft
Reading in units of lm/5ft
Depth less than 1 m/5ft is indicated as 0m/Oft.
Depth more than 50m/1 25ft is indicated as over-zone
Maximum depth to be
memorized
Additional functions
Continuous
operating time
Additional
Comments
1 m to 50m/5ft to 1 25ft
*
Charge level indication function
*
Insufficient charge warning indication a Stop
warning function
*
Time reset warning function
*
From full charge to stopping: Approx. 2 months
*
From full charge to NGindication: Approx. 1 month
*
Form insufficient charge warning to stopping: Approx.
2 days
Movement Cal
ber B740: Depth indicationin meters
Movement Caliber B741: Depth indication in feet
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3. SOLAR-POWERED WATCH
When the watch is used for diving (about two hours a week), it will run for about
one month (until NG is indicated).
An Eco Drive Rechargeable battery is used in this watch to store electrical
energy. If the rechargeable battery is fully charged once, the watch will
continue running for about two months.
<How to use this watch properly>
It is recommended that you recharge the battery everyday.
To insure that this watch demonstrates its depth meter function and chronograph
function besides the timekeeping function, always keep it sufficiently charged.
If the battery is not sufficiently charged or the battery power is very low, the
depth meter function and chronograph function cannot be activated.
The battery of this watch is protected from overcharge.
* For recharging the battery, expose the solar cell (the face of the watch) to
light.
4. USING THIS WATCH
A. Name of Parts
Charge
levels
Over-zone
mark
Depth meter
scale
Pressure
sensor
Water sensor
Rotating bezel
Solar cell
Charge level of the battery (battery power) is indicated as follows
(LV.1, LV.2, NG) by the function hand. These guidelines indicate
whether the depth meter function is usable or not.
When the diving depth exceeds 50 meters (125 feet) or there is
something abnormal in the depth meter function, the function hand
points to the over- zone mark.
The diving depth is indicated by the function hand on this depth
meter scale.
Measures the depth by sensing the water pressure.
When the water sensor gets wet, the watch is automatically shifted
to the diving mode.
The diver can know the elapsed time of diving by using this rotating
bezel.
Electric energy necessary for running the watch is generated by this
solar cell when it is exposed to enough light for charging the
battery.
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B. Warning Function of this Solar Powered Watch
With decline of the battery power of this watch, its warning function is
activated to change the indication.
[Normal
indication
(Time mode)]
Function
hand: Points
LV.2, LV.1
at
NG.
or
Insufficient
charge warning
indication]
Function hand:
Points at
NG
[Stop
warning
indication]
Function hand:
Points at "O"
Mode hand:
Points at "O".
[Time reset warning
indication]
Function hand:
Points at
NG,
Charge Level Indication
The function hand indicates the charge level as follows (LV.1, LV.2 and
NG) to let the user know whether the watch can be used for diving or not.
In the diving mode, consumption of battery power is considerably
increased because the pressure and water sensors are actuated. Before
using this watch for diving, charge the battery sufficiently and confirm
the charging level which is indicated by the function hand.
<When the function hand points at LV.1 (at
56- seconds’ position)>
The watch is securing battery power enough
for sports diving at the depth of 20m (66ft)
or so for about an hour.
• However, when the function hand points at
LV.1 as a result of charging the battery
after it was once depleted (after the
status that the function hand indicated
NG), be sure to charge the battery with a
lighting of 3000 lux (20 cm under a
fluorescent lamp) for at least 10 minutes
before diving.
• If diving continues for more than one
hour, pay careful attention to the
indication of the function hand, because
the indication may change to NG from LV.1
during the diving and the watch may
discontinue measuring the depth.
<When the function hand points at "LV.2"
(54 seconds)>
The battery is almost fully charged.
Accordingly, the watch can be used reliably
for diving.
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<When the function hand points at "NG"
(58 seconds)>
The watch will not shift to the diving mode
because of insufficient charging. When the
watch is in this status, it cannot be used
for diving because its depth meter function
won't be activated.
If the function hand points to "NG" during a
dive, immediately stop using relying on the
watch for depth measurement.
x Use the indication of the charge level as a reference only.
x If the watch is exposed to strong light for charging the battery,
the function hand may temporarily indicate "LV.I" or "LV.2" despite
insufficient charging. If the function hand goes to "LV.1" or "LV.2"
from "NG" position in a short time, you need to pay careful
attention to charging conditions.
It is recommended that you keep the battery sufficiently charged all
the time but especially before using the watch for diving. Always
check the indication of charge level carefully just before diving.
(For details of charging time, refer to "C. Time Required for
Charging".)
Insufficient charge warning function
Insufficient charge warning indication Made hand: DV position, Function hand: NG
position-
Whenever the battery power becomes
insufficient for operation, the watch is
automatically shifted to the Time mode
regardless of the currently set mode and the
second hand goes for 2-second interval
movement. (insufficient charge warning
indication)
If the watch is left in this condition
without recharging for another two days, the
watch will stop.
• If the watch falls into such condition, the
time measurement will be discontinued in the
chronograph mode.
• While the watch is falling into the
insufficient charge warning indication, all
button operations are ineffective except the
maximum depth operation.
Since the watch continues accurate indication of the date and time even in
the insufficient charge warning indication, the watch will recover normal
operation if it is exposed to light sufficient for charging the battery.
For using the watch the watch for diving, sufficiently charge the battery
until the function hand indicates “LV.1” or “LV.2” on the charge level.
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Stop warning function
Stop warning indication
- Mode hand: "O" position, Function hand: "O" position -
If the watch is left in the insufficient charge warning indication for
two days, both the mode hand and function hand will move to "O" position
respectively, If the watch falls into this condition, it indicates that
the watch has stopped operation completely. (Stop warning indication)
* All functions of the watch are inactivated in this indication.
When the rechargeable battery is charges in this condition, the watch
restarts operation as it is switched to the time reset warning
indication
Time reset warning function
Time reset warning Indication - Mode
hand: DV position, Function hand:
NG position -
With progress in charging the
battery as the watch is exposed to
light, the watch starts running but
shows incorrect time. In this
condition the second hand moves
irregularly every two seconds to
show that the time is incorrect.
(Time reset warning indication)
To change the watch to time mode, reset the watch correctly after fully
charging the rechargeable battery.
If the rechargeable battery is sufficiently charged but the watch has
not been reset to the correct time, the second hand continues to go
irregularly every two seconds
Overcharge prevention function
This watch has an overcharge prevention function. When the secondary
battery is fully charged, this function is activated to protect the
battery from overcharge by cutting of power supply. This function
relieves you from worry about overcharge.
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