MSA ALTAIR 5 Manual De Instrucciones página 7

MSA
Perform a blocked flow test (see section 4.2) before each day's use if
equipped with an integral pump.
MSA recommends to check the instrument's functionality (see section 3.6)
and carry out a routine inspection each day before use.
Perform calibration check (see section 3.8) before each day's use to verify
proper instrument operation. Adjust calibration if the readings are not within
the specified limits.
Check calibration more frequently if the unit is subjected to physical shock
or high levels of contaminants. Also, check calibration 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 "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
•
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.
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Do not use the ALTAIR 5 and ALTAIR 5 IR Multigas Detectors to test for
•
combustible 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.
•
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
•
times vary based on the type of sensor being utilized (see Section 5.5,
"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.
Sampling lines made from 0.062 inch (1.57 mm) inner diameter tubing
•
provide fast transport times to the instrument; however, they must be
limited to 50 feet (15 m) in length.
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ALTAIR 5 - Operating Manual
INSTRUMENT SAFETY
, and an explosion hazard exists.
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