Safety And Precautionary Measures - MSA ALTAIR 4X Manuel D'utilisation

1.2. Safety and Precautionary Measures

Carefully review the following safety limitations and
precautions before placing this instrument in service.
Incorrect use can cause serious personal injury or death.
• Check function (see section 3.6) each day before use. MSA
recommends carrying out a routine inspection prior to each day's
use.
• Perform a Bump Test (see section 3.8) before each day's use to
verify proper instrument operation. The instrument must pass the
bump test. If it fails the test, perform a calibration (see section 3.9)
before using the instrument.
• Perform a bump test more frequently if the unit is subjected to
physical shock or high levels of contaminants. Also, perform a
bump test more frequently if the tested atmosphere contains the
following materials, which may desensitize the combustible gas
sensor and reduce its readings:
• Organic silicones
• Silicates
• Lead-containing compounds
• Hydrogen sulfide exposures over 200 ppm or exposures
over 50 ppm for one minute.
• The minimum concentration of a combustible gas in air that can
ignite is defined as the Lower Explosive Limit (LEL). A combustible
gas reading of "XXX" indicates the atmosphere is above 100 %
LEL or 5.00 %vol CH 4 , and an explosion hazard exists. Move
away from hazardous area immediately.
• Do not use the ALTAIR 4X Multigas Detector to test for combustible
or toxic gases in the following atmospheres as this may result in
erroneous readings:
• Oxygen-deficient or oxygen-rich atmospheres
• Reducing atmospheres
• Furnace stacks
• Inert environments
• Atmospheres containing combustible airborne mists/dusts.
" WARNING
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