Suunto X6 Guide D'utilisation page 51

Set reference altitude (real altitude)
Displayed altitude
Real outside temperature
Normal (table) temperature
Temperature offset (= real - normal)
Sum of temperature offsets
Table 3 shows an example in which the temperature offsets are negative. This time
imperial units are used. The reference altitude is set at 3280 feet. At 9840 feet the
altitude difference is 6560 feet and the Suunto X6/X6M shows 100 feet too much (-
14 ºF * 6560 ft * 0.0011/ºF = -100 ft). Your actual altitude is thus 9740 ft.
Table 3. Example using feet and Fahrenheit.
Set reference altitude (real altitude)
Displayed altitude
Real outside temperature
Normal (table) temperature
Temperature difference (= real - normal)
Sum of temperature offsets
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Table 2. Example using meters and Celsius
Lower point
1000 m
+17.5 ºC
+8.5 ºC
+9 ºC
+9 ºC + +11 ºC = 20 ºC
Lower point
3280 ft
+36.3 ºF
+47.3 ºF
-9 ºF
-9 ºF + -5 ºF = -14 ºF
Higher point
3000 m
+6.5 ºC
-4.5 ºC
+11 ºC
Higher point
9840 ft
+18.9 ºF
+23.9 ºF
-5 ºF
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