WYLER BlueLEVEL-2D, Manual, Page: 33 / 65

page 33 of 65 pages
4.7 R
ADIO
ON/OFF
This adjustment allows you to switch the wireless data transmission on or off.
Using the key select the menu point [Options] and
confirm your selection with . Select now [Radio
ON/OFF] and confirm with
Switch the wireless transmission ON or OFF using the keys
and confirm with the key .
The measuring instrument will return to the measuring mode.
4.8 G
RAVITATION
The inclination displayed by the BlueLEVEL -2D is based on the gravitation. Around the globe the
gravitation is, however, not constant but it varies with the latitude and with the height above sea level.
Furthermore variations of the density in the lithosphere cause additional local deviations.
As an example the gravity at sea level is

9,78033 m/s
2
at the equator ,

9,80620 m/s
2
at 45 degree of
latitude,

9,83219 m/s
2
at the poles.
In the table to the right the values of
gravity for some cities are listed.
The BlueLEVEL-2D has been calibrated
at the head office of WYLER AG. The
inclinations displayed are exact only in
this location. In different places the
displayed value must be corrected. If the
correction of the local gravity is swi tched on, the inclination measured will be corrected accordingly
before the value is displayed.
The correction is calculated according the following formula:
 







m
m
c
eff
g
g
 
sin arcsin
whereas
g
c
gravity at the place of calibration
α
m
displayed angle at place of measurement
g
m
gravity at the location of measurement
α
eff
effective angle
In order to switch the correction of the local gravity on respectively off, proceed as follows:
Using the key select the menu point [Options] an d
confirm your selection with . Select now [Gravity] and
confirm with .
Amsterdam 9.813 Istanbul 9.808 Paris 9.809
Athens 9.807 Havana 9.788 Rio de Janeiro 9.788
Auckland, NZ 9.799 Helsinki 9.819 Rome 9.803
Bangkok 9.783 Kuwait 9.793 San Francisco 9.800
Brussels 9.811 Lisbon 9.801 Singapore 9.781
Buenos Aires 9.797 London 9.812 Stockholm 9.818
Calcutta 9.788 Los Angeles 9.796 Sydney 9.797
Cape T own 9.796 Madrid 9.800 T aipei 9.790
Chicago 9.803 Manila 9.784 T okyo 9.798
Copenhagen 9.815 Mexico City 9.779 Vancouver, BC 9.809
Nicosia 9.797 New York 9.802 Washington, DC 9.801
Jakarta 9.781 Oslo 9.819 Wellington, NZ 9.803
Frankfurt 9.810 Ottawa 9.806 Zurich 9.807