Sinn U1 SERIES, Owner'S Manual, Page: 14 / 35

14
A premiere: certification in accordance with European diving device
standards
In a standardised test situation, will a diving watch deliver the same reliable
performance as, say, a breathing apparatus? To answer this question, we were
the first who have watches tested and officially certified according to the
European standards for diving equipment. Also these tests are performed at
regular intervals for all these watches. The testing and certification according
to the European standards EN250 and EN14143 was completely new territory
for both sides. This was the case because the standards for diving equipment
cannot be applied to watches without modification. The experts at DNV GL
thus adapted the standards appropriately and defined two series of tests. In
the first of the two, they put the timepieces in a test cabinet for three hours at
−20 °C, then for three more hours at +50 °C. The timepieces were subsequently
checked for accuracy and functional reliability at both temperatures. In a
second test, the watches had to withstand three hours at −30 °C and 3 hours
at +70 °C with 95 % humidity. The result: Temperature resistance and perfect
functioning were documented and certified for the watches in the U1, U1000
(since 2007), U2, U200 (since 2009), T1, T2, U212 (since 2013), EZM 13 (since 2014)
and EZM 3 series after both tests. The UX series watches were also certified;
however, these were subjected to a modified test involving temperatures
between − 20 °C and +60 °C due to their battery operation and oil filling.