SIGMA 2
2
1.5 SERVICING
SIGMA 2 must be serviced at scheduled
intervals by personnel who have completed
a formal training course and hold a current
certificate for servicing and repairing
SCOTT breathing apparatus. Details of the
servicing schedule are contained in the
SCOTT SIGMA 2 Service Manual, copies of
which can only be obtained by registered
holders of a current certificate.
Your distributor or Training and Technical
Support Services can provide training
course details and quotes for service
contracts. Please see above for contact
details.
1.6 SPARE PARTS AND
ACCESSORIES
Our Customer Services Department
provide an efficient, friendly, customer
contact point for ordering new apparatus,
spare parts and accessories. The team can
also provide general information on SCOTT
products.
Customer Services:
Scott Health and Safety Limited
Pimbo Road,
West Pimbo,
Skelmersdale,
Lancashire,
WN8 9RA,
England.
Tel: +44 (0) 1695 711711
Fax: +44 (0) 1695 711775
1.7 NOTIFIED BODIES
Inspec International Limited (0194)
56 Leslie Hough Way,
Salford,
Greater Manchester,
M6 6AJ,
England.
BSI Product Services (0086)
Kitemark House,
Maylands Avenue,
Hemel Hempstead,
HP2 4SQ,
England.
2. TECHNICAL
DESCRIPTION
2.1 GENERAL
SIGMA 2 is a self-contained, open circuit,
compressed air, positive pressure,
breathing apparatus, approved to EN 137
(self-contained open circuit breathing
apparatus). It is 'CE' marked in accordance
with Council Directive 89/686/EEC.
SIGMA 2 is approved for use at sea by:
Lloyds Inspectorate, in accordance with
SOLAS regulation 17 and the 1980
Merchant Shipping Act.
Please call Scott Health and Safety
Limited for further apparatus approval
details.
2.2 APPARATUS
DESCRIPTION
SIGMA 2 has a lightweight back-plate and
harness. The two stage pneumatic system
consists of a first stage reducing valve; and
a Demand Valve (DV) that is attached by a
bayonet fitting, to the positive pressure full
facemask.
The back-plate is injection moulded
polyamide/glass/carbon composite, with a
fully adjustable flame retardant polyester
webbing harness. The Kevlar
TM
cylinder
band is fully adjustable and can
accommodate one cylinder from the range
listed in Table 2. A glass-filled polyamide
cam-lock buckle facilitates quick and easy
cylinder replacement. A lumbar pad,
fabricated from flame retardant polyester
and packed with flame retardant closed cell
foam, cushions the weight of the apparatus.
It is attached to the lower back-plate by
means of press-studs. Pneumatic hoses
run in channels moulded into the inner
back-plate. Hose retaining clips are
moulded on the edge of the channels. A
cylinder valve retainer on the lower back-
plate provides a secure mounting for the
cylinder valve.
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