Chapter 4 Barometer Mode - Suunto OBSERVER TT Mode D'emploi

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 Observer shows 100 feet too much (-14 ºF * 6560 ft
* 0.0011/ºF = -100 ft). Your actual altitude is thus 9740 ft.
Set reference altitude (real altitude)
Displayed altitude
Real outside temperature
Normal (table) temperature
Temperature difference (= real - normal)-9 ºF
Sum of temperature offsets

CHAPTER 4 BAROMETER MODE

The Barometer provides you with:
• An adjustable unit of measure hPa or inHg; hPa range 300 to 1100 hPa, inHg range
8.90 to 32.40;
• A resolution of 1 hPa or 0.05 inHg;
• A one hour interval measuring to estimate barometric trend;
• An automatic 4-day memory of atmospheric pressure;
• Temperature compensation (temperature does not effect the pressure within the
specified temperature range);
• A temperature range -20º to 60ºC or -5º to 140ºF;
• A temperature resolution of 1º C or F; and
• An Altimeter-Barometer use feature. Refer to Chapter 3, Altimeter-Barometer Use for
more information.
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Table 3. Example using feet and Fahrenheit.
Lower point
3280 ft
+36.3 ºF
+47.3 ºF
-9 ºF + -5 ºF = -14 ºF
Higher point
9840 ft
+18.9 ºF
+23.9 ºF
-5 ºF