Page 2 - English
English 2 You are now the proud owner of a SEIKO Analogue Quartz Watch Cal. 7K52. For best results,please read the instructions in this booklet carefully before using your SEIKO Analogue QuartzWatch. Please keep this manual handy for ready reference. Vous voici l’heureux propriétaire d’une montre qu...
Page 3 - ENGLISH; CAUTION
English 3 ENGLISH CAUTION The SEIKO SCUBA DIVER’S Cal. 7K52 is intended for use in aninherently hazardous form of recreation. Therefore, it isabsolutely essential that you observe strictly all instructionsfor the use and maintenance of the watch set forth in thisbooklet.First of all, this watch is f...
Page 5 - CONTENTS; Page
English 5 CONTENTS Page HOW TO USE THE SCREW LOCK TYPE CROWN ..................................................... 8 TIME/CALENDAR SETTING ........................................................................................ 9 ADJUSTING THE HAND POSITION BEFORE DIVING ...............................
Page 6 - Current depth, maximum depth, diving time and time submerged
English 6 CAL. 7K52 DIVING MEASUREMENT ● Full automatic measurement of diving data Current depth, maximum depth, diving time and time submerged ● Recording of log data Maximum depth, average depth, diving time and time submerged for the last two dives ● Warning functions • Rapid ascent warning• Extr...
Page 7 - a b c d; CROWN
English 7 a: Screwed-in position b: Normal position c: First click d: Second click a b c d Hour hand Minute hand Small second hand Water contact sensor Time submerged Alarm time MAX. DEPTH hand 1/10 m hand Rotating bezel DIVING TIME hand Date DEPTH hand ★ Pressure sensor islocated under here. ★ B A ...
Page 8 - HOW TO USE THE SCREW LOCK TYPE CROWN; WARNING; While you are underwater, never unscrew the crown or pull it out.
English 8 HOW TO USE THE SCREW LOCK TYPE CROWN ● To unscrew the crown:Turn it counterclockwise. ● To screw in the crown:With the crown at normal position,turn it clockwise while pressing it. WARNING ● While you are underwater, never unscrew the crown or pull it out. ● Do not pull out the crown to th...
Page 9 - TIME/CALENDAR SETTING; Set hour and minute hands.
English 9 A TIME/CALENDAR SETTING Hour hand Minute hand Small second hand Press to set small hour and minutehands to the time set above. ▼ Push in in accordance with a timesignal. ▼ Screw in completely. Small hour andminute hands Date A CROWN CROWN Unscrew. ▼ Pull out to first click and turn counter...
Page 10 - ADJUSTING THE HAND POSITION BEFORE DIVING; Press repeatedly until you hear a long beep.
English 10 ADJUSTING THE HAND POSITION BEFORE DIVING B Press repeatedly until you hear a long beep. B C DEPTH hand 1/10 m hand MAX. DEPTH hand DIVING TIME hand CROWN Set the current time. (See “TIME/CALEN-DAR SETTING) ▼ Push in in accordance with a time signal,and screw in completely. ▼ ▼ C Press to...
Page 11 - DIVING MEASUREMENT; Current depth: Indicated by DEPTH and 1/10 m hands
English 11 DIVING MEASUREMENT ● The watch measures the current depth, maximum depth, diving time and time submerged,and indicates them with the four hands for diving measurement and the small hands at the 6o’clock position. ● Current depth: Indicated by DEPTH and 1/10 m hands in 0.1 m increments fro...
Page 12 - HOW TO USE THE DIVING FUNCTION
English 12 0.0 m 1.6 m 55.0 m Diving measurement starts whenyou descend to 1.6 m or more. Never operate the crown whilethe measurement is in progress. HOW TO USE THE DIVING FUNCTION Before diving, check the handsfor diving measurements. Press button B repeatedly. Log data of the last dive Log data o...
Page 13 - Extra measurement range warning !; Case I
English 13 Extra measurement range warning ! Rapid ascent warning ! ➡ Diving measurement stops whenyou ascend to less than 1.6 m. Case I Case II Case I : If you stay at less than 1.6 m underwaterfor more than 10 minutes, the dive isconsidererd to be completed. Case II : If you descend again to 1.6 m...
Page 14 - Beep; WARNING FUNCTION FOR DIVING; RAPID ASCENT WARNING
English 14 ● Before starting a dive, be sure to check that the hands for diving measurement are reset to “0” position.If not, reset them following the procedure in “ADJUSTING THE HAND POSITION BEFORE DIVING”. ● When you ascend to a depth less than 1.6 m underwater and the watch stops measuring the d...
Page 15 - ABNORMAL MEASUREMENT / MEASUREMENT HALT WARNING
English 15 CAUTION The rapid ascent warning is given whenever the diver’s ascent rate is beyond thespecified criterion. The extent of hazardousness, however, varies depending on thewater temperature and the diver’s physical condition. Please note that the warningserves only as a guideline for your d...
Page 17 - RECALL OF LOG DATA; Press to recall the log data.
English 17 RECALL OF LOG DATA ● The watch retains data for two dives, namely, time submerged, diving time, maximum depthand average depth. * Log data cannot be recalled while diving and for 10 minutes after diving. B Press to recall the log data. ● With each press of button B, recall of the log data...
Page 18 - ROTATING BEZEL
English 18 ROTATING BEZEL ● The rotating bezel can show up to 60 minutes of elapsed time.It is useful for measuring the surface interval. 2 Read the number on the rotatingbezel that the minute hand pointsto. 1 Turn the rotating bezel to alignits “ ” mark with the minutehand. Elapsed time Start 20 mi...
Page 19 - To stop the alarm manually:; The alarm can be set to ring once within the coming 12 hours.; ALARM TIME SETTING
English 19 SINGLE-TIME ALARM ● To stop the alarm manually: Press any of the buttons. ● To cancel the alarm: Press button B to recall the log data, or pressand hold button A until the small hands indicatethe current time. ● The alarm can be set to ring once within the coming 12 hours. ● While on the ...
Page 20 - PRECAUTIONS FOR DIVING; BEFORE DIVING
English 20 PRECAUTIONS FOR DIVING BEFORE DIVING ● Check that: • the watch operates normally.• the crown is locked tightly in place.• there are no visible cracks in the crystal or the watch band.• the strap or bracelet is securely fastened to the watch case.• the buckle keeps the strap or bracelet fi...
Page 21 - F), the depth measurement may be inaccurate, and depths greater; WHILE DIVING; Take care not to hit the watch against hard objects such as rocks.
English 21 or in temperatures outside the operational temperature range for depth measurement (0 ° C to 40 ° C or 32 ° F ~ 104 ° F), the depth measurement may be inaccurate, and depths greater than 1.6 m may be displayed even while the diver is on the surface, resulting in endlessdepth measurement a...
Page 22 - rapid ascent warning may or may not reach your ears.; AFTER DIVING
English 22 rapid ascent warning may or may not reach your ears. ● If you find the DEPTH hand indicating the 58-minute position while you are underwater, youshould either ascend to the surface immediately or, if you choose to remain underwater, notdepend on diving information provided by the watch. ●...
Page 23 - NOTES ON USING THE WATCH
English 23 NOTES ON USING THE WATCH TIME/CALENDAR SETTING ● Do not set the date between 9:00 p.m. and 1:00 a.m. Otherwise, the date may not change properly. ● Be sure to set the time hands and the small hands at the 6 o’clock position accurately to the currenttime as the time submerged recorded as l...
Page 24 - How to read the measurements; How to use the diving function; Rapid ascent warning
English 24 DIVING MEASUREMENT How to read the measurements ● The time submerged is the time when you descend to a depth of 1.6 m or more underwater, and thediving time measurement starts at the same time. ● The time submerged is indicated in the 12-hour indication without showing AM/PM. ● The diving...
Page 25 - Abnormal measurement / measurement halt warning; Remarks on the indication of MAX.DEPTH and DEPTH hands
English 25 • Maximum depth : The MAX. DEPTH hand indicates the 56-minute position.• Average depth : The DEPTH hand indicates the 56-minute position. • Time submerged and diving time are recorded as measured. Abnormal measurement / measurement halt warning ● If the watch senses an abnormality while m...
Page 27 - BATTERY LIFE INDICATOR; years; . However, because the battery is inserted at the factory to check; Years; BATTERY CHANGE
English 27 BATTERY LIFE INDICATOR ● When the battery nears its end, the small second hand moves at two-second intervalsinstead of the normal one-second intervals. In that case, the watch will stop operatingin 2 to 3 weeks. Replace the battery with a new one as soon as possible. * While the small sec...
Page 28 - Do not remove the battery from the watch.
English 28 * For safety’s sake, the watch will also undergo a strict check at the time of battery replacement. In addition to battery replacement, water resistant quality of the watch and the depth measurementfunction will be checked. The gasket will be replaced with a new one if necessary. Therefor...
Page 29 - Necessary procedure after battery change
English 29 Necessary procedure after battery change ● When the battery is replaced with a new one or when the watch hands move improperly, follow theprocedure below. The IC is reset and then the watch operates normally. * The log data stored in memory will be erased by following the procedure below....
Page 30 - HOW TO USE THE DIVER EXTENDER; To extend the band length; To change back the band length
English 30 HOW TO USE THE DIVER EXTENDER Flap Clasp 12 o’clock side Two-piecefoldover portion Upper cover 6 o’clock side ➡ 2 ➡ 1 ➡ 3 ➡ 4 ➡ ➡ ➡ ➡ 6 Approx. 2 cm 5 ● To extend the band length 1 Lift up the flap. 2 Press the button to open the clasp. * Then, push the flap back to the normal position fo...
Page 31 - SPECIFICATIONS
English 31 SPECIFICATIONS 1 Frequency of crystal oscillator ................... 32,768 Hz (Hz = Hertz ... Cycles per second) 2 Loss/gain (monthly rate) ............................. Less than 15 seconds at normal temperature range (5 ° C ~ 35 ° C) (41 ° F ~ 95 ° F) 3 Operational temperature range .....
