Accuracy of mechanical watches – Seiko 4R36 User Manual
Page 13
English
25
English
24
Problem
Possible causes
Solutions
The watch
gains/loses time
temporarily.
The watch has been
left in extremely high
or low temperatures
for a long time.
Normal accuracy will resume when the
watch returns to normal temperature.
The watch was
brought into close
contact with a
magnetic object.
Normal accuracy will resume when the
watch is kept away from close contact
with the magnetic source. If this condition
persists, consult the retailer from whom the
watch was purchased.
You dropped the watch,
hit it against a hard
surface or wore it while
playing active sports.
The watch was exposed
to strong vibrations.
Normal accuracy will not resume. Consult
the retailer from whom the watch was
purchased.
The watch has not
been overhauled for
more than 3 years.
Consult the retailer from whom the watch
was purchased.
The date change at
12 o’clock noon.
AM/PM is not
properly set.
Advance the hands by 12 hours.
The glass is blurred
and the blur persists
for a long time.
Water got inside the
watch due to the
deterioration of the
gasket, etc.
Consult the retailer from whom the watch
was purchased.
•
For the soluton of troubles other than listed above, contact the retailer from whm the watch was purchased.
ACCURACY OF MECHANICAL WATCHES
●
The accuracy of mechanical watches is indicated by the daily rates of one week
or so.
●
The accuracy of mechanical watches may not fall within the specified range of
time accuracy because of loss/gain changes due to the conditions of use, such as
the length of time during which the watch is worn on the wrist, arm movement,
whether the mainspring is wound up fully or not, etc.
●
The key components in mechanical watches are made of metals which expand
or contract depending on temperatures due to metal properties. This exerts an
effect on the accuracy of the watches. Mechanical watches tend to lose time at
high temperatures while they tend to gain time at low temperatures.
●
In order to improve accuracy, it is important to regularly supply energy to the
balance that controls the speed of the gears. The driving force of the mainspring
that powers mechanical watches varies between when it is fully wound and
immediately before it is unwound. As the mainspring unwinds, the force
weakens.
Relatively steady accuracy can be obtained by wearing the watch on the wrist
frequently for the self-winding type and winding up the mainspring fully everyday
at a fixed time to move it regularly for the wind-up mechanical type.
●
When affected by external strong magnetism, a mechanical watch may loss/gain
time temporarily. The parts of the watch may become magnetized depending on
the extent of the effect. In such a case, consult the retailer from whom the watch
was purchased since the watch requires repair, including demagnetizing.