sea level, but it will change with the absolute
atmospheric pressure change.
PAST 24 HOURS HISTORYRECORD
GB
TO SET RELATIVE ATMOSPHERIC
PRESSURE VALUE
1.
2.
3.
4.
5.
Press and hold the
[ BARO ]
key for 2 seconds until
“Abs” or “Rel” icon flashes.
Press
[ CH / + ]
or
[ MEM / - ]
key to switch to
RELATIVE
mode.
Press the
[ BARO ]
key once again until the
RELATIVE
atmospheric pressure digit flashes.
Press
[ CH / + ]
or
[ MEM / - ]
key to change the value.
Press the
[ BARO ]
key to save and exit the setting
mode.
The default relative atmospheric pressure value is
1013 hPa (29.92 inHg), which refers to the average
atmospheric pressure.
When you change the relative atmospheric pressure
value, the weather indicators will change along with it.
The relative atmospheric pressure is based on the
Note:
The main unit will record past 24 hours weather data of
In / outdoor thermo-hygro & barometric pressure
135 |136
Summary of Contents for C8490A
Page 40: ...NOTIZEN D ...
Page 42: ...VUE D ENSEMBLE DE L UNITÉ PRINCIPALE F 1 2 ...
Page 78: ...NOTES F ...
Page 116: ...I NOTE ...
Page 118: ...OVERVIEW MAIN UNIT 1 2 GB ...
