Sinn 756 User manual

MODEL SERIES 756

CONTENTS
SINN SPEZIALUHREN ZU FRANKFURT AM MAIN
THE DUOCHRONOGRAPH 756
THE DUOCHRONOGRAPH 756 DIAPAL
INSTRUCTIONS FOR USE
Ar-DEHUMIDIFYING TECHNOLOGY
USING THE CHRONOGRAPH TO MEASURE TIME
ASSEMBLING AND ADJUSTING
THE LENGTH OF STRAPS
TECHNICAL DETAILS
SERVICE
6 – 9
10 – 11
12 – 13
14 – 17
18 – 19
20 – 21
22 – 27
28 – 31
32 – 33

4
DEAR CUSTOMER,
We know from numerous
conversations that the people
who buy our watches do so out of
conviction. This includes people with
a pronounced affinity to technology
who are fascinated, for example,
by the solutions we have devised
for protection from magnetic fields
and scratch resistance. Some of our
customers, such as divers, pilots and
the German GSG 9 special police
unit, rely on their watches in their
respective careers because their lives
depend on it.
They all swear by the performance,
resilience and durability, as well
as the quality and precision of our
watches. That is why the world’s
largest classification society DNV GL
(formerly Germanischer Lloyd,
Hamburg) regularly tests and certifies
the water and pressure resistance of
our diving watches.

5
We have selected pilot’s watches tested and certified to the technical
standard for pilot watches (Technischer Standard Fliegeruhren – TESTAF) by
Aachen University of Applied Sciences. The TESTAF ensures that a pilot’s watch
meets all timekeeping requirements during flight operations in accordance
with visual and/or instrumental flight regulations and is suitable for professional
use. Functionality is our top priority and ultimately determines the design. Only
the technical features that are really needed can be found on our watches.
Because we believe that products have to speak for themselves.
The basic question that we ask ourselves is: which innovative technologies
and materials can be employed for our craft and provide solutions for
rendering our watches even more practical for everyday use? It is often
worth indulging in a little lateral thinking to see what is going on in other
industrial sectors or fields of science. We repeatedly go to the limits of physical
resources to upgrade our watches – with the aim of making what’s good
even better. Most of our best developments are yet to come!
I am delighted that you have decided to buy a SINN timepiece and hope
that it will continue to give you pleasure for many years to come.
Yours sincerely,
Lothar Schmidt

6
SINN SPEZIALUHREN ZU FRANKFURT AM MAIN
It was back in 1961 that pilot and blind-flying instructor Helmut Sinn founded
the company. Since then, we have been committed to producing high-
specification mechanical watches. In 1994, the graduate engineer Lothar
Schmidt took over the company. This marked the beginning of a new era
for the SINN brand, because the new owner took a decisive step towards
more innovation. Under his leadership, new technologies and materials were
introduced, thus providing the crucial incentives for our company’s evolution
and gradual emergence as an insider’s tip for lovers of fine watches. Today,
our name stands for technical innovations – much to the delight of both the
trade and our customers alike.

7
Advancements in endurance testing
Take, for example, the absolutely condensation-
free, anti-reflective, German Submarine Steel diving
watch – made possible by HYDRO Technology.
Other examples include a chronometer
chronograph fashioned from a 22-carat gold
alloy that is as hard as stainless steel and a
chronometer with a magnetic resistance of
up to 80,000 A/m. There are also watches with
a clockwork mechanism optimally protected
from aging by an inert gas and integrated
dehumidifying capsule. The list would not be
complete without mentioning the development of
mission timers (Einsatzzeitmesser or EZM in German)
for firefighters, for special police units and border
patrol guards as well as Temperature Resistance
Technology to keep mechanical watches
performing at temperatures ranging from − 45 °C
to + 80 °C. This technology has proven its worth in
the EZM 10 TESTAF model, for example, used as
part of the official approvals procedure for Airbus
Helicopters (formerly Eurocopter) EC 145 T2 high-
performance helicopter. Hot and cold climate tests
and high-altitude experiments were carried out in
the deserts of the USA, the Rocky Mountains and
the frozen wastes of Canada. The watch was worn
unprotected, outside the pilot’s overall, during cold
climate tests at temperatures reaching − 45 °C.

8
Innovations and certifications
The world’s largest classification society for maritime safety DNV GL (formerly
Germanischer Lloyd, Hamburg), has been testing our diving watches
for pressure and water resistance since 2005. As part of DNV GL’s official
certification process, our diving watches have been treated as part of diving
equipment since 2006 and tested and certified in accordance with European
diving equipment standards. This is unparalleled in the watch industry.
We have had selected pilot’s watches tested and certified to the technical
standard for pilot watches (Technischer Standard Fliegeruhren – TESTAF)
by Aachen University of Applied Sciences since 2012. The TESTAF, the result
of a research project at the initiative of Sinn Spezialuhren, ensures that a
pilot’s watch meets all timekeeping requirements during flight operations in
accordance with visual and/or instrumental flight regulations and is suitable
for professional use.
DIAPAL is one of our most important technological developments, with oiling
no longer needed for the most important functions in the watch thanks to
the materials we select. This technology was first used in 2001. With the aid
of TEGIMENT Technology, we achieve greatly increased scratch resistance
through surface hardening.

9
Ongoing advancement in technology and quality
Our top priority has always been to develop watches that offer superior
performance – both in daily and in professional use. Which is why our
engineers are working continually to identify which innovative methods,
materials and technologies are best suited for optimising our watches.
Each new development has to first undergo rigorous practical tests before
being incorporated. And no watch leaves our workshops before it has
been subjected to thorough checking and fine adjustment by our master
watchmakers.
Workshop modifications and hand-engraving
From the robust case and the polished crystal
through to elaborate refinements: we make sure
that each and every detail of our watches is fit
for purpose. The same applies to our workshop
modifications. Only the perfect interaction of all
components and technologies ensures that our
watches can meet all their design specifications
in full. Take for example the SZ02 calibre of our
U1000 diving chronograph. The 60-minute scale
of the stopwatch minute counter is much simpler
and more intuitive to read than the 30-minute
scale commonly found on other watches. The
hand-engraving represents a highly personal form
of refinement. If required, our specially trained
engraver can etch a name, initials, monograms
or symbols onto the rotor, movement bridge and
case back.

10

11
The 756 series pilot’s watches unite all our core watchmaking competencies:
these are instrument watches with a consistently functional design which
honour the tradition of our navigation cockpit clocks.
The features of the 756 chronographs series include Magnetic Field Protection
of up to 80,000 A/m, Ar-Dehumidifying Technology enhances functional
reliability and freedom from fogging, TEGIMENT Technology and therefore
especially scratch-resistant, functionally reliable from − 45 °C up to + 80 °C and
pressure resistance of up to 20 bar.
THE DUOCHRONOGRAPH 756

12

13
The special in this instrument chronograph is the DIAPAL Technology.
First developed by SINN in 2001, it is now in successful practical use. The
starting point for our considerations back then was the critical feature
of every mechanical watch: the aging of the oil, particularly around the
Swiss anchor escapement, and the accompanying adverse effects on the
accuracy of the movement. Theoretically, it was only a small step from the
analysis to the solution: where there’s no oil, there’s no aging. However, this
concise expression required numerous tests in practice. The technology is
documented by the DIAPAL logo on the charcoal grey galvanized dial.
THE DUOCHRONOGRAPH 756 DIAPAL

14
Crown position
0 1 2 3
Hour hand
Date display
Stopwatch hour hand
Minute hand
Stopwatch second
hand
Stopwatch minute
hand
INSTRUCTIONS FOR USE
Duochronograph 756

15
Winding the watch (crown position 1)
The crown is screwable (crown position 0). To loosen the crown, turn it counter-
clockwise (crown position 1). The movement is wound by turning the crown
clockwise. About 40 winds of the crown are generally enough to ensure
reliable functionality. Under normal circumstances, simply wearing the watch
every day should suffice to keep the self-winding mechanism wound. The
power reserve allows you to take off your watch overnight without having to
re-wind it.
Time adjustment (crown position 3)
In crown position 3, the motion is paused. This helps you to set the watch
precisely. Please make sure the date changes at midnight and not at
midday. Just move the hands forward until the date changes. Afterwards you
attempt to set the time. We recommend moving the hands past the desired
minute marker and then adjusting it backwards. The movement restarts as
soon as the crown is no longer in position 3.
Quickset date adjustment (crown position 2)
Do not use this function between 9 p.m. and 3 a.m. Set the crown in position 2
and turn it clockwise until the correct date appears in the date display
window. Please do not use the date-setting function between 9 p.m. and
3 a.m. Between these times, the gear wheels used for changing the date are
engaged, and the movement could be damaged.
Please take care to fasten the crown after making adjustments.

16
INSTRUCTIONS FOR USE
Duochronograph 756 DIAPAL
Crown position
0 1 2 3
Hour hand
Date display
Stopwatch hour hand
Minute hand
Stopwatch second
hand
Stopwatch minute
hand
Hand for second
time zone (UTC)
Winding the watch (crown position 1)
The crown is screwable (crown position 0). To loosen the crown, turn it counter-
clockwise (crown position 1). The movement is wound by turning the crown
clockwise. About 40 winds of the crown are generally enough to ensure
reliable functionality. Under normal circumstances, simply wearing the watch
every day should suffice to keep the self-winding mechanism wound. The
power reserve allows you to take off your watch overnight without having to
re-wind it.

17
Hand for second
time zone (UTC)
Time adjustment (crown position 3)
In crown position 3, the motion is paused. This helps you to set the watch
precisely. Please make sure the date changes at midnight and not at
midday. Just move the hands forward until the date changes. Afterwards you
attempt to set the time. We recommend moving the hands past the desired
minute marker and then adjusting it backwards. The movement restarts as
soon as the crown is no longer in position 3.
Quickset date adjustment (crown position 2)
Do not use this function between 9 p.m. and 3 a.m. Set the crown in position 2
and turn it clockwise until the correct date appears in the date display
window. Please do not use the date-setting function between 9 p.m. and
3 a.m. Between these times, the gear wheels used for changing the date are
engaged, and the movement could be damaged.
Adjusting the second time zone (crown position 2)
Pull the crown into position 2 and turn it counter-clockwise until the correct
time appears. The UTC hand stops at hourly intervals. This setting may be
adjusted between 9 p.m. and 3 a.m., but it is important to ensure that you
are really setting the second time zone in this period by turning the crown
counter-clockwise! Otherwise the watch could be damaged!
Please take care to fasten the crown after making adjustments.

18
The colour scale for the Ar-Dehumidifying Technology: the capsule continues
to absorb moisture until the darkest colouration is reached.
Indication colours of the drying capsule
Pale blue
Up to 25%
saturation
Light blue
Up to 50%
saturation
Medium blue
Up to 75%
saturation
Dark blue
Up to 100%
saturation
Initial condition Drying capsule
saturated
u
Ar -DEHUMIDIFYING TECHNOLOGY

19
Perfect freedom from fogging
All the watches in this series meet the technical requirements for
waterproofness, as set out in standard DIN 8310. But even with watertight
instruments, the air enclosed in the case contains water in a gaseous state.
And air can also penetrate the seals. When the water vapour in the case
condenses into liquid, the instruments are impossible to read. To prevent this
from happening, we have developed the Ar-Dehumidifying Technology.
The combination of a special drying capsule, EDR seals (extreme diffusion
reduction) and a filling of protective gas guarantee that the crystal remains
free from fogging, even in difficult conditions.
Longer service intervals
The sophisticated Ar-Dehumidifying Technology considerably slows the aging
process of the watch’s inner workings and keeps the movement functioning
properly for longer. That is why we issue a three-year warranty on all our
watches featuring Ar-Dehumidifying Technology. When the drying capsule
is saturated, as indicated by a deep blue colour (refer to picture on the left
side), we recommend you have it exchanged so you can continue to enjoy
all the advantages of the Ar-Dehumidifying Technology (enhanced reliability,
longer intervals between maintenance).

20
Push piece A:
start/stop
Push piece B:
reset
The chronograph is operated by means of buttons A and B. The measurement
starts when button A is pressed once. Pressing this button again stops the
measurement. The measurement is resumed by pressing button A once more.
This allows you to add up and record the cumulative time. Button B resets the
hands of the chronograph to zero.
USING THE CHRONOGRAPH TO MEASURE TIME
Stopwatch hour
hand
Stopwatch second
hand
Stopwatch minute
hand
Duochronograph 756