UNION GLASHÜTTE/SA U-7750 User manual

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U-7750
User’s manual
www.union-glashuette.com U-7750_EN / 2018
Technical specications
• Mechanical movement chronograph U 7750 with
automatic winding and day and date indicator
• Number of jewels: 25
• 28,800 vibrations/hour (4 Hz)
• Power reserve: Approx 46 hours
Display / Functions
1 Hour hand
2 Minute hand
3 Small seconds hand
4 Day and date indicator
5 Central 60 second hand (chronograph)
6 30 minute counter (chronograph)
7 12 hour counter (chronograph)
8 Tachymeter scale
9 Start/Stop push-button (chronograph)
10 Reset push-button (chronograph)
11 3 position crown
I Rest and winding position
II Day and date setting position
III Time setting position, with stop second and
midnight date and day change

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U-7750
USE
Winding
Crown in position I, not pulled out
Manual winding is necessary if you have not worn your
watch for some considerable period of time.To restart it,
you only need to turn the crown a few times (clockwise), or
to tilt your watch from side to side a few times.To restore
your watch’s 46 hour power reserve, around 32 turns of
the crown (forward) are required.
When wearing your watch, the automatic device winds it
every time you move your wrist.
Notes
The accuracy may be inuenced by the wearing conditions.
There is no stop of the crown at full winding.
Setting the time
Crown in position III, pulled out
Pull the crown out to position III carefully; the seconds
hand (3) will stop.Turn the crown forwards or backwards
to set the desired time.
Once the hour hand passes the 12 o’clock position, you
can see if it is indicating midnight (date and day will change)
or midday (date and day will not change).
Advice on how to synchronise your watch
To synchronise the seconds hand (3) with an ofcial time
signal (radio/TV/Internet), pull out the crown to position
III ; the seconds hand will stop.At the signal, push the crown
back into the rest position I.
Day and date correction
Crown in position II, intermediate
Pull the crown out to position II, turn it forwards to set the
date or backwards to set the desired day and then push
it back into the rest position I. During this operation, your
watch will continue running, so the time will not need to
be re-set.
Important: Never correct the date and/or day between
8 p.m. and 2 a.m.; the movement is changing the date
and the day.
Chronograph function
Press the Start/Stop push-button (9) to start the chrono-
graph. Press the Start/Stop push-button (9) again to stop
it. The chronograph will resume if the Start/Stop push-
button (9) is pressed again (added times), or the three
chronograph hands (5, 6and 7) will return to zero if push-
button (10) is pressed.
Notes
The 12 hour counter (7) has an area with alternating
colours (black/white) indicating every half hour, matching
the outer numerals (0 to 30 minutes) and inner numerals
(30 to 60 minutes) of the same colour on the 30 minute
counter (7).
Depending on the model you have chosen, the colours
of the 12 hour counter area (7) may vary (e.g. white/red,
black/red, white/yellow, etc.), but they always match the
numerals on the 30 minute counter.
Tachymeter
Start the chronograph and stop it once a distance of 1 km
has been covered by pressing the Start/Stop push-button
(9).The chronograph hand will be pointing to a numeral
on the tachymeter scale (8), indicating the speed in km/h.
CARE AND MAINTENANCE
We would advise you to clean your watch regularly (except
for the leather strap) using a soft cloth and lukewarm
soapy water.After immersion in salt water, rinse the watch
in fresh water and leave it to dry completely.
Ensure that you do not leave it in places subject to great
temperature and humidity variations, in intense sunlight or
near strong magnetic elds.
We recommend you have your watch inspected every
3 to 4 years by your approved dealer or agent. For an
irreproachable maintenance service and to ensure the
warranty remains valid, always approach an approved
dealer or agent.
Water resistance precautions
Your watch is water resistant but, following a shock, it
may lose its water resistance without you realising. Water
resistance must be checked up during its scheduled
inspection.
Important: In the event of failure of your watch, entrust
it only to an approved dealer or agent (see the
warranty).