MSA
Technical Data
ALTAIR 4X
54
GB
(6) The results are intended for guidance only. For the most accurate measure-
ments, an instrument should be calibrated using the gas under investigation.
(7) The conversion factors for the standard EX and the specialised EX-H and
EX-M sensor are the same except for EX-H and Nonane and o-Xylene. The
conversion factors for these two vapours are therefore especially mentioned
in the table.
Oxygen
The oxygen sensor has built-in temperature compensation. However, if tempera-
ture shifts dramatically, the oxygen sensor reading may shift. Zero the device at a
temperature within 30 °C of the work place temperature for the least effect.
* Certified for 0 - 25 vol.% O
2
Carbon Monoxide
Range
0 to 30 vol.% O
2
*
Resolution
0.1 vol.% O
2
Reproducibility
0.7 vol.% O
2
for 0 to 30 vol.% O
2
Response time
(90% of final reading)
<10 second (normal temperature range)
Sensor Cross-Sensitivity
The oxygen sensor has no common cross-sen-
sitivities.
Data is presented as the indicated output in PPM which will result from
the application of the test gas.
Range
0 - 1999 ppm (0 - 1999 mg/m
3
) CO
Resolution
1 ppm (1.2 mg/m
3
) CO for 0 to 1999 ppm
Reproducibility
±5 ppm (5.8 mg/m
3
) CO or 10 % of reading,
whichever is greater
(normal temperature range)
±10 ppm (11.6 mg/m
3
) CO or 20 % of reading,
whichever is greater
Response time
90% of final reading in less than or equal to
15 seconds (normal temperature range)
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