FOBO Ultra, Руководство пользователя, Страница: 10 / 53

10 | P a g e
recommendation, for all altitude above sea-level,
given a constant temperature.
As a corollary, a tire with a Fobo reading of, say 40
psi at an altitude of 5000ft, will read the same 40
psi when driven to sea-level, given a constant
temperature. In reality, it will read higher due to the
warmer temperature at sea-level, and may need
some air release if the temperature difference is
great. Tire pressure generally will increase 1 psi
(~7kPa) for every 10 deg F (5.6 deg C) rise in
temperature.
FOBO wishes to highlight the above formulation is
for usage at sea-level and above, and will not be
accurate for use otherwise. In practice, this should
not be an issue as the lowest area on earth will
result in an insignificant error of 0.3 psi (~2 Kpa).
For users who wish to retain „Gage Pressure
Reading‟, the FOBO Ultra App has a Gage Pressure,
adjusted to local altitude using cell towers or
individual phone barometer if available. This Gage
Pressure button can be accessed from the App
(Kindly refers to Section 5.10 of this user manual).
FOBO Ultra sensor units are designed to be robust and operate reliably 24x7
to provide tire information around the clock. It is designed to be water proof
and by our special use of custom engineering plastics, it will be able to
withstand road salts or other common automotive chemicals (petrol, engine
oil, wash shampoo, etc.).
Our designers have designed the sensors to ensure that there is no air leakage
as it replaces the tire‟s original valve cap. There is no need to screw on the
sensor extremely tight. Apply a reasonable hand twist force to ensure the
sensor is securely installed and should be able to be removed by hand with
ease.
When installing the sensors, please follow the on-screen prompt of the In-car
unit. After installation, in the event the tire sensors positions are mixed up,
usually after performing a tire rotation maintenance, you can easily re-
position the sensors to their correct position by selecting „sensor rotation‟ on
the in-car unit and follow the on-screen instructions. This eliminates the need
to remove the tire sensors physically.