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1. 

OUTLINE 

This series of movements (C020, C021, C023, C026, C027, C029), are the 
worlds first multifunctional movement used in a dive watch that has an 
electronic water-depth meter built into it. It can resist water to 20 bar, 
or 666 feet. 
 

2. 

USE OF THIS WATCH 

 
Notes on Use 

• 

The water dept meter was originally designed for use in Sea water. 
Therefore, then it is used in a lake or in fresh water, the displayed 
value is slightly different from that in sea water. (Specific gravity 
of Sea Water is 1.025) 

• 

To ensure water-resistance at a depth of 200 meters (666 feet), be 
sure to replace the gaskets, including push button gaskets and have 
the watch water tested at least at each battery change. If you use the 
watch in salt or chlorinated water, more frequent changes may be 
necessary. 

• 

This watch CANNOT be used as a substitute for an accompanying dive 
instrument or as a preventative measure against water hazards 

• 

Do not use the dive meter in the following environments 

i.  Where the altitude is more than 3,000 meters (10,000 feet) 

ii.  Where there is a substantial change in atmospheric pressure or 

temperature after changing over to the dive meter system mode, 
depth display may show more than 1 meter (3 feet) even while on 
the ground. IN this case, the dive meter system mode will not 
change over to any other mode. To obtain proper operation of the 
watch, set the time display and dive meter systems once again by 
pushing the (R), (S) and (M) buttons at the same time. 

iii.  Where temperature is beyond the +10

o

C (+50

o

F) to +40

C (+104

o

F) 

When the watch is used in the above mentioned environments, the 
depth meter mode may be over 1m (3ft) even while on the ground. 
In these cases, return the watch back to the effective operating 
temperature ranges. 

• 

If the depth meter mode returns to 0m (0ft), the display is found in 
the maximum depth and dive time memory 
Accordingly, if it is feared that the depth meter will return to 0m 
(0ft), summon the maximum depth memory mode immediately before diving 
and then summon the depth meter mode. 

• 

Of the depth meter mode does not return to 0m (0ft) a substantial 
temperature change is thought to have taken place. In this case, refer 
to the preceding item iii. 
 
* These phenomena are not deemed are problems. If the above 
instructions are observed with the users environments in mind, correct 
measurement of depth is possible. 

 
Notes on Diving 
 Before 

Dive 

• 

Make sure that the colon (:) on the time display in the digital 
section does not flicker on and off 
*before diving, be sure to check when to replace the power cells. 

• 

Make sure that the crown has been firmly screwed in place 

• 

Make sure that there are not cuts, cracks or scratched on the crystal 

• 

Make sure the band is in good condition, and not cracked or worn out. 

• 

To get more accuracy in depth measurement, check the cell on the dive 
meter system after dipping the watch in water for 2 minutes. If there 
is s big temperature difference between the surface and water 
temperatures, be sure to change over to the dive meter system on the 
surface. (If changing over in the water at big temperature 
differences, accuracy may be affected.) 

• 

When the depth meter mode is shown, make sure that the display is 
correct. 

 

Return to Table of Contents

 

Return to Table of Contents

 

Summary of Contents for C020

Page 1: ... DIGITAL TIME a Time Display System b Time Calendar and Alarm Setting 6 STOPWATCH USE 7 CHANGE OVER BETWEEN THE TIME DISPLAY AND DIVE SYSTEMS 8 CHANGING OVER TO THE DIVE METER SYSTEM 9 EXPLANATION OF THE DIVE METER SYSTEM 10 HOURLY CHIME ALARM MONITOR 11 POWER CELL LIFE INDICATOR 12 USE OF THE REGISTER RING 13 HOW TO READ THE NON DECOMPRESSION LIMIT VALUES 14 SPECIFICATIONS 15 HOW TO CARE FOR YOUR...

Page 2: ...o C 104o F When the watch is used in the above mentioned environments the depth meter mode may be over 1m 3ft even while on the ground In these cases return the watch back to the effective operating temperature ranges If the depth meter mode returns to 0m 0ft the display is found in the maximum depth and dive time memory Accordingly if it is feared that the depth meter will return to 0m 0ft summon...

Page 3: ... safety function fail safe operating begins working immediately stop using the watch and have it checked at your closest Authorized Citizen Service Center When the dive meter system functions do not operate properly or when the colon in the digital display flickers on and off when the power cell indicator is in operation the change over from the time to dive meter system cannot be made This is bec...

Page 4: ... of moisture To set the analog time first unscrew the crown in a counter clockwise motion to release it from the case Pull the crown out 1 click and turn to set the current time After setting the time push the crown in one click While applying gentle pressure towards the case turn the crown in a clockwise motion to lock it onto the case Return to Table of Contents Return to Table of Contents ...

Page 5: ...he R upper right button is pushed when the second display is between 30 and 59 seconds the digital minute will advance by 1 minute How to set the time calendar and alarm 1 To set the time calendar and alarm push the S upper left button in each respective display mode until the correction mode is obtained digits flashing 2 Any mode can be independently corrected Select the mode that you wish to cor...

Page 6: ...rn OFF thus the ALARM OFF and ALARM SET will be displayed P mark appears only for PM in the 12 hour display No mark has been provided to indicate AM prior to noon When the dive meter is in use the buzzer does not sound even though the current time reaches the Alarm Set time How to set the time How to set the calendar Return to Table of Contents Return to Table of Contents ...

Page 7: ... 00 seconds and starts recounting from 0 If the S upper left button is repeatedly pushed during the time counting the stopwatch works as an integrated meter going back and forth between running and Stop over and over again A confirmation tone is heard of the S upper left button is pushed when the stopwatch starts or stops running Return to Table of Contents Return to Table of Contents ...

Page 8: ... display flashes on and off In this case have it checked by the nearest Authorized Citizen Service Center When the power cell life indicator is in operation the dive meter system cannot be called up Fail safe operation system 8 Changing over to the dive meter system The depth meter is displayed by pushing the S upper left button in any mode of the four numbered 1 to 4 To change the mode from the d...

Page 9: ...played value of the maximum depth memory is 80M 260ft The maximum depth memory is displayed as follows When the depth value is under 1 0m 3ft the displayed figure is 0 The depth value is shown on a 0 1m 1ft basis when it is over 1 0m 3ft When the depth value is over 80m 260ft it is displayed as B Depth Alarm What is the depth alarm Example When the diving depth exceeds the previously set value a b...

Page 10: ...ng at a depth of more than 1m 3ft which is automatically memorized As long as the depth meter mode is not cancelled the dive time is automatically added and memorized The dive time is displayed by changing over to the dive time memory mode after finishing the dive The dive time memory mode is replaced by the depth meter mode When more than 1m 3ft in depth is measured the dive time memory mode is r...

Page 11: ...pth of more than 1m 3ft the depth meter mode is not replaced by any other mode even when the S upper left button is pushed fail safe operation How to read the display The maximum display value of the dept meter is 80m 260ft Depth is displayed as follows Display in meters 0 1 0 1 1 1 2 80 0 Display in feet 0 3 4 5 260 When the figure 0 is displayed it flashes If the figure 0 remains displayed for 3...

Page 12: ...m 3ft with the depth meter continuously displayed and it automatically stops when the diver surfaces to a level less than 1m 3ft in depth 2 When the diver reaches a depth of 1m 3ft the previous records of the maximum depth and dive times are reset and a new measurement begins Return to Table of Contents Return to Table of Contents ...

Page 13: ...ick sound is provided in order to protect the above mechanism Do not use force to turn the bezel in a clockwise direction Otherwise the case may become damaged and need replacement Set the triangle mark to the position of the minute hand as the dive start time to read the elapsed time The ring can be turned in units of one half minutes 13 HOW TO READ THE NON DECOMPRESSION LIMIT VALUES Depending on...

Page 14: ...splayed value is 0M 0ft Depth is displayed on a 01m 1ft basis Depth Alarm Can be set at up to 80m 258ft Setting ca be made on a 1m 3ft basis Dive Time Memory Minute Second displays up to 59 min 59 sec Dive Time Alarm Ca be set at between 5min and 60min Setting can be made a intervals of 5 minutes Depth Meter Display from 0m 0ft to 80m 260ft When depth is under 1m 3ft the displayed value is 0M 0ft ...

Page 15: ... It should be dried immediately or taken to a watchmaker or jeweler if moisture is inside the case to prevent damage from rust Vital components necessary to resist the entrance of moisture deteriorate with time and use Gaskets crowns and other materials should be replaced every year or two to ensure PRECAUTIONS ABOUT CARE AND HANDLING OF WATCHES that water resistant quality remains at factory spec...

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