Intrinsic Safety; Reading; Contact - MSA ORION Manual

Four-Head Gas Detector: MSA Orion
If the atmosphere is rich or deficient in oxygen, the Orion's combustible and toxic
gas readings can be affected.
High humidity can lessen oxygen readings over time.
The Orion should not be used to monitor:
• reducing atmospheres, such as ammonia,
• atmospheres containing combustible mists or airborne dusts.
A high sample temperature, such as when a sample is drawn from inside a furnace
stack, will affect the readings. This is not recommended.
Battery consumption is high when the unit alarms, for instance during the challenge
test. Acknowledge alarms quickly and keep spare batteries on hand.
1.3.1

Intrinsic safety

The Orion meets:
• AS/NZS 60079.11:2000 for intrinsic safety, within the temperature limits of
–20 °C to 40 °C
• AS/NZS 61779.1:2000 for intrinsic safety
• AS/NZS 61779.1:2000 and 61779.4:2000 for performance of electrical
apparatus for the detection and measurement of flammable gases in
environments with a potentially explosive atmosphere, other than mines where
high over-range %LEL readings can occur.
See Section 2.4: 'Specifications' on page 9
1.4

Reading

This Recommended Practice must be read in conjunction with the following
documents:
• Standard Operating Guidelines, Section 9: Respiratory protection, Fire and
Rescue NSW, Greenacre, Australia.
• Hazardous Materials SOG 10.1: Guidelines for all hazardous materials
incidents, Fire and Rescue NSW, Greenacre, Australia.
• Firefighters Training Manual Vol 2, 'Topic Six: Breathing Apparatus', Fire
and Rescue NSW, Greenacre, Australia.
• Recommended practice: Wearing of uniforms and personal protective
equipment (PPE), CI:06745, Fire and Rescue NSW, Greenacre, Australia.
1.5

Contact

Any queries regarding the equipment or procedures described in this document
should be directed to Gas Help on 0407 663491.
D.I. Rec-ommended Practice
FILE: W:\NB\RP HMRU\Orion\Frame Ver 02\Orion.fm
for details of intrinsic safety.
Version 02 Issued February 2011
© Copyright State of NSW (Fire and Rescue NSW) 2011
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