Outdoor temperature
The current temperature is shown on the SID display when the TEMP function is selected or if the temperature warning function is activated, then the outdoor temperature is displayed
A temperature warning function is built into the SID unit and works as follows:
If the temperature falls from a higher temperature down to +3°C (37°F) or rises from a lower temperature to -3°C (26°F), the outdoor temperature is automatically displayed irrespective of the SID unit display setting.
This display remains until another function is selected.
To avoid the effect of radiant heat, the temperature sensor reading is updated differently depending on whether the outdoor temperature is rising or falling and it is speed-dependent.
The reading is updated as follows:
- +1°C (1.8 °F) every 6 minutes at speeds below 30 km/h.
- +1°C (1.8 °F) every 30 seconds at speeds above 30 km/h.
- -1°C (1.8 °F) every 2.5 seconds.
If the engine is turned off, the current outdoor temperature reading is stored in the SID. The SID unit calculates for how long the engine has been switched off. When the ignition is turned on again, the SID unit displays the stored outdoor temperature reading from ignition OFF if the time since turning off the engine is:
- less than 12 minutes.
If the engine has been turned off for longer than 12 minutes, the current outdoor temperature reading from the temperature sensor will by displayed.
Information on the outside temperature is sent as bus information, unit °C/°F (-40 to +50°C), (-40 to 122°F).