Performance Specification; Combustible Gas; Oxygen - MSA ALTAIR 4X Operating Manual

Performance Specification

5.4.1 Combustible Gas

Range
Resolution
Reproducibility
Response Time
(Typical)

5.4.2 Oxygen

The oxygen sensor has built-in temperature compensation. However,
if temperature shifts dramatically, the oxygen sensor reading may shift.
Zero the instrument at the work place temperature for the least effect.
Range
Resolution
Reproducibility
Response time
(Typical)
0 to 100% LEL or 0 to 5% CH 4
1% LEL or 0.05% vol CH 4
3% LEL, 0% to 50% LEL reading
or 0.15 % CH 4 , 0.00% to 2.50 % CH 4
(normal temperature range)
5% LEL, 50% to 100% LEL reading
or 0.25 % CH 4 , 2.50% to 5.00 % CH 4
(normal temperature range)
5% LEL, 0% to 50% LEL reading
or 0.25 % CH 4 , 0.00% to 2.50 % CH 4
(extended temperature range)
8% LEL, 50% to 100% LEL reading
or 0.40 % CH 4 , 2.50 % to 5.00 % CH 4
(extended temperature range)
90% of final reading
<15 seconds(pentane)
<10 seconds (methane)
(normal temperature range)
0 to 30 vol.% O 2
0.1 vol.% O 2
0.7 vol.% O 2 for 0 to 30 vol.% O 2
0.7% O 2 for O 2 < = 15% (MSHA version only)
0.5% O2, for O2: 15%<O2 < =30% (MSHA version only)
90% of final reading
<10 seconds (normal temperature range)
5-3