Omega SA 1400, 2520 Quartz chronograph, Calibre 1270 fig, Watch functions, Chronograph functions

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Quartz chronograph

CALIBRE 1270 (fig. X)

The time functions (hours, minutes, seconds) are driven by a primary motor using traditional quartz watch technology.

The chronograph functions are provided by a combination of quartz and mechanical technology. The chronograph hand, driven by a separate motor, makes 16 jumps per second. Its movement appears continuous and it can be read off the scale to within 1/10th of a second. The reset function, like the minute and hour totaliser func- tions, is carried out mechanically. The return to zero is instantaneous.

In order to reduce energy consumption to a minimum, the chronograph automatically stops after more than 11 hours of operation.

The crown has 3 positions:

Watch functions:

1.Normal position (wearing position): when pushed into the case, the crown ensures that the watch is water-resistant.

2.Date setting: pull the crown out to position 2, turn the crown forwards until the required date is displayed, then push the crown back to position 1.

NOTE: it is impossible to set the date between 8pm and 2am.

3.Time setting: pull the crown out to position 3. The seconds hand will stop. Turn the crown forwards or backwards. Synchronise the seconds by pushing the crown back to position 1 to coincide with a given time signal.

Chronograph functions:

•Pusher A: start – stop, start – stop etc. Timing to within 1/10th of a second for up to 11 hours.

English

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Contents

Operating Instructions Viii Xviii Contents What are the service intervals? Special recommendationsEnvironmental protection Leather strapsAnti-reflective treatment Screw-in crownOmega International Warranty Valid for U.S.A. onlyOmega SA Rue Stämpfli 96, 2500 Bienne Omega International Warranty Above manufacturer’s warranty Calibres 1426, 1530, 1532 fig Quartz WatchCalibres 1376, 1456 fig Calibres 1424, 1538 figCalibre 4000 fig. IIbis Time setting by pressing the correctorCalibres 1424 Watch functions Quartz chronographCalibre 1270 fig Chronograph functionsSimple timing function crown in position Pusher B ResetCalibre Pusher a Start stop read timePusher a Stop to read time Pusher a Press again to restart Addition function crown in positionPusher a Start Pusher a StopCalibres 1120, 2500, 2520, 2610 fig 2627 fig. III 2300 fig Power reserve cal Counter at 9 o’clock small secondsManual & Self-winding watch Calibre 2201 Manual-winding Power reserveCrown has 2 positions Calibres 3205 fig. XV 3220 fig. Xiii 3601 Pusher B reset after a stopSelf-winding chronograph Regatta function calApnea function based on a 14 minute dive Regatta functionApnea function cal Changing the date press the corrector C at 10 o’clock Self-winding chronograph with dateCalibre 3304 fig Calibre 1151 figSelf-winding split seconds chronograph Watch functions calibreSelf-winding split seconds chronograph Chronograph functions with split secondsManual-winding chronograph Calibres 1861, 1863 fig. XV 1866, 3604 figCalibre 1866-Date and moon phase correction Date setting small counter at 12 oclock press corrector CCalibre 1680 fig Setting the hands minutes and secondsPerpetual calendar ThermocompensationDisplay and correction of the month Display and correction of the yearly cycle Self-winding GMT & GMT Chronograph Calibres 1128 fig. VI 2628 fig 3603 figSelf-winding GMT & GMT Chronograph Bi-directional turning bezel calibre Coincide with a given time signalSecond Time Zone calibre 1128, fig Second Time Zone calibre 2628, fig. VII, calibre 3603, figDays Position Temperature 23C Days 14,15 Position Temperature 23COther Omega mechanical watches Precision tolerances32 -1 to +6 seconds per day Quartz watchesPressure is gradually increased to Helium escape valveHelium escape valve fig How to use the helium escape valve fig Not functional, since it is screwedExample calculating the speed of a car Using the tachymetric scaleTachymetric scale Rubber strap Rubber strap Snap-fastening foldover clasps Opening Adjusting the lengthFoldover clasps ClosingClosing fig Adjusting the length figFoldover clasps with pushers Opening fig Pictograms