Oxygen Limit Fraction, Olf - Suunto Vyper User Manual

m
MAX
O2%
NO DEC TIME
C
B
T
°
C TIME TIME TIME
Fig. 3.24 Alternative display.
Pressing the TIME button dis-
plays the current time, maximum
depth and CBT.
m
MAX
O2%
NO DEC TIME
OLF
°
C
DIVE TIME
Fig. 3.25 The lowest bar
graph blinks to indicate
that the OLF value shown
relates to OTU.
30
By pressing the TIME button during a nitrox dive,
the alternate display appears, which includes (Fig.
3.24):
• the current time
• Consumed Bottom Time
• maximum depth (during decompression
display)
After fi ve seconds the display will automatically
revert to the original display.
3.3.3. Oxygen Limit Fraction,
OLF
In addition to tracking diver's exposure to nitrogen,
the instrument tracks the exposure to oxygen, if set
to NITROX Mode. These calculations are treated as
entirely separate functions.
The Oxygen Limit Fraction (OLF) is a combination
of two methods tracking the oxygen toxicity: the
Central Nervous System Toxicity (CNS) and Oxygen
Tolerance Unit (OTU). Both fractions are scaled so
that the maximum exposure is expressed as 100%.
Each of the 11 segments represents 10%. The frac-
tion closest to the maximum limit is displayed. When
OTU% reaches the CNS% limit the lowest segment
starts to blink (Fig. 3.25). The OLF is calculated
based on the factors listed in chapter 6.1. "Operating
Principles".