Use The Altitude Difference Calculator - Tech4o traileader pro User Manual

9.2 Set a Reference Altitude
Setting a reference altitude is key to ensuring accurate
readings. Changes in air pressure skew altimeter read-
ings. Remedy this by setting a new, known reference
▼
▲
▼
Increase
Decrease
▼
▼
▼
▼
▲
Confirmation
Yes/No
fig 31
altitude. Whenever you set a reference altitude,
use a trusted source such as a topographical map,
trail head marker or summit sign for a benchmark.
See fig. 31.
Access the Altimeter Mode Display.
• Hold M for 3 seconds to enter Altimeter set menu
• Press ▼ to scroll to Ref. Alt.
▲
• Press M to select Ref. Alt.
* Press ▲ or ▼ to adjust the reference altitude
▼
to match a benchmark altitude
* Press ESC to go to No/Yes
* Press ▲ to confirm or
* Press ESC to cancel
• Press ESC to exit Altimeter set menu

9.3 Use the Altitude Difference Calculator

This feature allows you to measure the difference
in altitude from your current location to any other
point along your trek.
Access the Altimeter Mode Display.
• Hold M for 3 seconds to enter Altimeter set menu
• Press M to select Alt. Dif.
* Press ▲ to clear the Altitude Difference
calculator
The altitude difference calculator now uses your
current altitude as a benchmark to measure altitude
difference until it is reset or you:
* Press ESC to cancel and exit Alt. Dif.