BALL Watch BMW Owner's Manual - page 12
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ENGLISH
The temperature recorded by the TMT is precise and instantaneous
but it records the temperature inside the watchcase, which is
inevitably affected by the temperature of the wearer’s wrist. To
reveal the actual environmental temperature, the watch should be
taken off for about 10 minutes until the inside of the watch reaches
the ambient temperature. When worn over a wetsuit or parka, the
TMT should immediately display ambient temperature without any
distortion due to body heat.
The temperature scale in degrees Celsius [°C] can be easily
converted into Fahrenheit scale following this simple formula:
°F = °C x 9/5 + 32.
TMT
The TMT watches can
measure temperatures from
negative 40°C to positive
50°C (-40 to122°F) with the
indicator at 6 o’clock.
Caring for your BALL watch
Like a car engine, we recommend that you have your mechanical
BALL watch checked, cleaned and lubricated by us or a BALL
Authorized Service Center every three to five years. This regular
maintenance will prevent damage to the movement due to the
lubricating oils drying out.
Your BALL watch requires a certain amount of care. A few basic
recommendations will help you to ensure its reliability and keep it
look new.
Please avoid placing your watch on refrigerators or loudspeakers as
they generate powerful magnetic fields.
• Shocks: Although your BALL watch has been built to withstand
shock according to the highest standard in the industry, extreme
impact against this precision instrument should still be avoided. A
strong impact on the winding crown or the crystal can impair the
water resistance or damage the movement.
• Cleaning: Make sure to rinse your watch regularly with fresh water,
especially after it has been in salt water. This will help preserving its
appearance and running condition.