MSA
The minimum concentration of a combustible gas in air that can ignite is
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defined as the Lower Explosive Limit (LEL).
A combustible gas reading of "100" or "5.00" indicates the atmosphere
is above 100 % LEL or 5.00 %vol CH
Move away from hazardous area immediately.
Do not use the ALTAIR 5 Multigas Detector to test for combustible or
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toxic gases in the following atmospheres as this may result in erroneous
readings:
Oxygen-deficient or oxygen-rich atmospheres
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Reducing atmospheres
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Furnace stacks
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Inert environments
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Atmospheres containing combustible airborne mists/dusts.
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Do not use the ALTAIR 5 Multigas Detector to test for combustible
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gases in atmospheres containing vapors from liquids with a high flash
point (above 38 °C, 100°F) as this may result in erroneously low
readings.
Do not block sensor openings as this may cause inaccurate readings.
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Do not press on the face of the sensors, as this may damage them and
cause erroneous readings. Do not use compressed air to clean the
sensor holes, as the pressure may damage the sensors.
Allow sufficient time for unit to display accurate reading. Response
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times vary based on the type of sensor being utilized (see Section 5.4,
"Performance Specifications"). Additionally, when using a sample pump,
allow a minimum of 1 second per foot (3 seconds per meter) of sample
line to allow the sample to be drawn through the sensors.
All instrument readings and information must be interpreted by someone
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trained and qualified in interpreting instrument readings in relation to the
specific environment, industrial practice and exposure limitations.
US
ALTAIR 5 - Operating Manual
INSTRUMENT SAFETY
, and an explosion hazard exists.
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