Cochran Lifeguard 04-150i, Руководство пользователя

Страница: 22 / 62

22
Surface Mode (continued)
Fig-3
Alternate Screen, with residual Nitrogen
•
BOTTOM time of last dive 1:26 (1 hr. 26 min)
•
BP indicating percent O
2
in current mix .51 (51%)
PreDive Prediction Mode
After 1 minute of Surface Mode, the LIFEGUARD™ enters its PreDive Prediction
Mode. The PreDive depths start at 30 feet and increase in 10-foot increments.
The PreDive Predictions will terminate when the No-Decompression (NDC) time
prediction is at least 2 minutes or when the set maximum PreDive Prediction
depth is reached, or when the user-set MAX PO
2
Alarm is computed. The
LIFEGUARD™ calculates the PreDive Prediction times based on either the PO
2
or FO
2
of the gas in the loop. Whether PO
2
or FO
2
is used in the predictions is
selected via the ANALYST
®
. If FO
2
is selected the fractional percentage of
oxygen in the breathing gas in the loop will be used only for PreDive Prediction.
The no-decompression (NDC) times that are computed during a dive are
calculated on the PO
2
of the loop gas regardless of the PreDive Prediction
selection. There is only a Primary Screen in this mode. The WU shows DEPTH,
current system PO
2
/ FO
2
and NDC (no-decompression time). The Predive
Information mode is repeated once each minute after being turned on. It
continues this cycle until either a dive is initiated or the time out limit is reached.