BMW F 800 R 2010 Rider's Manual page 68

Function
6
A sensor is located in each tire,
which measures the air temper-
66
ature and the inflation pressure
inside the tire and sends these
values to the control unit.
The sensors are equipped with
a centrifugal controller, which
does not enable the transmis-
sion of the measured values until
a speed of approx. 18.5 mph
(30 km/h) is reached. Before ini-
tial reception of the tire inflation
--
pressure, is shown in the dis-
play for each tire. The sensors
continue to transmit the mea-
z
sured values for approx. 15 min-
utes after the motorcycle comes
to a stop.
The control unit can manage four
sensors, and as a result two sets
of wheels with TPC/RDC sen-
sors can be driven. If a TPC/RDC
control unit is installed without
the wheels being equipped with
sensors, an error message is out-
put.
Temperature
compensation
The tire inflation pressure is tem-
perature dependent, i.e. it in-
creases or decreases together
with the tire temperature. The
tire temperature is dependent on
the ambient temperature and on
the driving style and duration.
The tire inflation pressures are
shown temperature-compen-
sated in the multifunction display;
they refer to a tire temperature
of 68 °F (20 °C). No temperature
compensation takes place in the
inflation pressure testers at filling
stations, i.e. the measured tire in-
flation pressure is dependent on
the tire temperature. As a result,
the values displayed there do
not match the values shown in
the multifunction display in most
cases.
Tire inflation pressure
ranges
The TPC/RDC control unit distin-
guishes between three inflation
pressure ranges matched to the
motorcycle:
Inflation pressure within the
permissible tolerance.
Inflation pressure at the limits
of the permissible tolerance.
Inflation pressure outside the
permissible tolerance.
A warning is also output if the
tire inflation pressure drops
rapidly within the permissible
tolerance.