Polar Electro AXN500 User Manual page 76

Season Total Values
* The altimeter must be on during action recording to update these values. The value is not updated if the barometer was activated.
76 ADJUSTING SETTINGS, REVIEWING FILES AND USING TIMERS (TIME MAIN MODE)
The date when the maximum descent rate was recorded.
Maximum descent rate.*
The date when the total altitude ascended was last reset.
Cumulative altitude ascended, commencing from the previous reset.*
The date when the total altitude descended was last reset.
Cumulative altitude descended, commencing from the previous reset.*