La Crosse Technology WS-3512 - Manual (Page 13)

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Time Zone → Time Zones can be set in the range from -12 to +12
hours (Default EST).
WWVB Radio-Controlled Clock (RCC) → ON/OFF. In setting “OFF“
the clock is operating as a normal Quartz clock (Default RCC OFF).
12/24 hour Time Display Format (Default 12h Format).
Units
•
Wind Speed Display (Wind) in km/h, mph, m/s, knots or Beaufort
(Default mph).
•
Air Pressure (Press) in hPa or inHg (Default inHg).
Relative Air Pressure (Rel. Pressure) → To be set to the locally valid
reference air pressure with regard to the local height above sea level
(Default 29.98 inHg).