BMW C 650 GT Rider's Manual page 78

Operation
7
A sensor located in each tire
monitors the air temperature and
76
the inflation pressure inside the
tire and transmits this information
to the control unit.
The sensors are equipped with
a centrifugal controller that
suppresses transmission of the
monitored data until a speed of
approx. 18 mph (30 km/h) is
reached. Before initial reception
of the tire inflation pressure,
-
is shown in the display for
each tire. The sensors continue
to transmit the monitored data
for approx. 15 minutes after the
z
motorcycle comes to a stop.
Temperature
compensation
The inflation pressure within a
tire is sensitive to temperature:
it responds to higher tire tem-
peratures by increasing, and to
lower temperatures by dropping.
Tire temperature, in turn, varies
according to the ambient temper-
ature as well as in response to
driving style and trip duration.
The tire inflation pressures that
appear in the multifunction dis-
play are generated with temper-
ature compensation; they are ad-
justed for a tire temperature of
68 °F (20 °C). No temperature
compensation is available in the
inflation pressure gauges at fill-
-
ing stations, meaning that the
measured tire inflation pressure
varies according to tire temper-
ature. As a result, the pressure
figures indicated by the gauges
at filling stations will usually vary
from those appearing in the mul-
tifunction display.
Adjusting inflation
pressure
Compare the TCP/RDC value in
the multifunction display with the
value on the back cover of the
Rider's Manual. The difference
between the two values must be
compensated with the air pres-
sure tester at the filling station.
Example: according to the
Rider's Manual, the tire inflation
pressure is to be 36 psi (2.5 bar),
however 33 psi (2.3 bar) is
shown in the multifunction
display. It is low by 3 psi
(0.2 bar).
The tester at the filling station
indicates 34.8 psi (2.4 bar). This
value must be increased by 3 psi
(0.2 bar) to 37.8 psi (2.6 bar) in
order to produce the correct tire
inflation pressure.