JFD B44771, Руководство по эксплуатации и обслуживанию

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OM131 iii
P1939-OM-131 R11 Preface
P
REFACE
The Secondary Life Support (SLS) System is an emergency breathing apparatus intended for use
by professional saturation divers, operating from a diving bell. The system is intended for use in the
event of a fundamental failure of a diver’s primary life support system (e.g. loss of primary breathing
gas, loss of hot water, etc). It has been designed in response to the acknowledged need to enhance
diver safety, as divers begin to work to extreme depths in the world's most hostile diving
environments. The System operates on a semi-closed circuit principle with complete independence
from the diver's primary breathing system.
The SLS System meets the Norwegian Petroleum Directorate (NPD) Regulations 1995, Section 38,
which requires that whilst breathing at a rate of 62.5 lpm (litres per minute) RMV (respiratory minute
volume), the diver should be provided with a minimum of 10 minutes of breathing gas in order to
return to the safety of the diving bell. It consists of a self-contained Backpack and Helmet that have
been the subject of considerable development and testing.
Feedback from users of the SLS System, since it was introduced in 1986, has resulted in several
design changes that have enhanced performance, diver comfort and safety. These changes brought
about the introduction of the SLS Mk II in 1988, the SLS Mk III in 1992 and the current and most
advanced version in 1996, the SLS Mk IV. The main areas of change in the Mk IV are:
a. Improved serviceability with redesigned backpack housing and scrubber housing.
b. Improved scrubber canister door sealing arrangement and strengthened door.
c. A refillable scrubber canister with a screw on cap that is easier to fill.
d. The incorporation of a positive pressure indicator (a Rotowink) that allows the diver to visually
confirm the correct operation of the positive pressure system.
e. Various improvements to the harness and actuation system.
This Manual contains information for the operation and maintenance of the SLS System Mk IV
Backpack. This consists of a main housing containing a gas injection system, a CO
2
scrubber
canister and a thermal regenerator. The backpack harness also contains the system counterlungs.
The operation and maintenance of the SLS System Mk IV Helmet is documented in a separate
Manual with the reference OM112.
It is essential that personnel both operating and maintaining the SLS System are completely familiar
with all the operational and maintenance
procedures. Divers should have attended a Familiarisation
Course and be totally comfortable and competent in the operation of the equipment, while
technicians should have completed the Divex three (3) day SLS System Training Course.
It is also important that the level of diver to technician competence is maintained and achieved to a
high level through regular use or experience. If in doubt of the individuals competency the person
should be re-trained.