Safety Regulations
ALTAIR 5X/ALTAIR 5X IR
8
GB
1.3 Safety and Precautionary Measures to be Adopted
Check calibration more frequently if the device is subjected to physical shock or
high levels of contaminants. Also, check calibration more frequently if the tested at-
mosphere contains the following materials, which may desensitise the combustible
gas sensor and reduce its readings:
- 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
4
, and an explosion hazard exists. Move away
from hazardous area immediately.
- Do not use the device to test for combustible or toxic gases in the following at-
mospheres as this may result in erroneous readings:
- Do not use the ALTAIR 5X and ALTAIR 5X IR Multigas Detectors to test for
combustible gases in atmospheres containing vapours from liquids with a high
flash point [above 38 °C, 100 °F] as this may result in erroneously low readings.
- Allow sufficient time for device to display accurate reading. Response times
vary based on the type of sensor being utilised [→chapter 5.3]. Allow a mini-
mum of 1 second per foot [3 seconds per metre] of sample line to allow the sam-
ple to be drawn through the sensors.
- Sampling lines made from 1.57 mm [0.062 inch] inner diameter tubing provide
fast transport times to the device; however, they must be limited to 15 m
[50 feet] in length.
- Sampling of reactive toxic gases [Cl
2
, ClO
2
, NH
3
] must only be done with the
reactive gas sample line and probe kits listed in the chapter 6 Accessories table.
- Organic silicones
- Silicates
- Lead-containing compounds
- Sulphur compound exposures over 200 ppm or exposures over 50 ppm for
one minute.
- Oxygen-deficient or oxygen-rich atmospheres
- Reducing atmospheres
- Furnace stacks
- Inert environments [only IR sensors acceptable for use]
- Atmospheres containing combustible airborne mists/dusts.
To Next Page
Loading...
