PowerTap Joule GPS User Guide - Manual (Page 46)

Joule GPS User Guide page 46
CHAPTER 8: DEVICE MENU
Displays the current altitude above sea level as calculated by the on-board barometric altimeter. This value is displayed in feet or
meters, depending the device Units setting.
Optional. Enter your actual home altitude/elevation here (from a known benchmark or topographic map data). This value
will be used to establish an offset for any variances in actual barometer readings, making the displayed elevation value
more consistent regardless of weather conditions. If you live below sea level, negative values can be entered as well.
Yes or No. Selecting Yes will direct the device to use the entered value of your Home Altitude as an offset from which to
calculate barometer differentials. Selecting No will direct the device to disguard your Home Altitude offset use the default
Sea level pressure of 1013.3mb as the base for all altitude calculations. Current Altitude
Home Altitude
Use Home Altitude?
ALTIMETER MENU MENU INPUT OPTION
DEVICE ALTIMETER
The Joule GPS contains a barometric Altimeter that allows you to monitor your current altitude, also referred to as current elevation.
Selecting Altimeter in the Device menu shows the current altitude, as calculated from the barometer. You may set a known value for
“home” altitude or the elevation of the starting point of the ride, and adjust the value of the current altitude to this known value.
Main Menu
Ride
History
Sensors
Training
Navigation
User
Device
Back to Dashboard
9:34
A
71º
INT
[ENTER]
Press & Hold
3 sec. to enter
Menus. Scroll
to Device;
Press •[ENTER] ;
Select an option,
FROM DASHBOARD
Device
Date and Time
Display
Averages
Record Control
Memory
Altimeter
About Joule
Back to Main Menu
9:34
A
Altimeter
Current Altitude
2480 (in ft or m)
Home Altitude
760 (ft/m)
Use Home Altitude?
No/Yes
Back to Device
9:34
A
NOTE: The barometer in your Joule GPS is very sensitive to barometric pressure. If weather patterns are changing,
resulting in a rising or falling barometer, the current elevation value will also change. The less stable the weather
the less stable the elevation value. However, even if the weather is not clear and windless, it is the pressure
differentials that are used to calculate elevation gains and losses, not the actual elevation change. The resulting
calculation, during the relatively short time frame of any particular ride, is accurate.