MSA altair 4 Service Manual

MSATechnical Data
ALTAIR 4
26
GB
7.3 Performance Specifications
Combustible Gas
Oxygen
The oxygen sensor has built-in temperature compensation. However, if tempera-
ture shifts dramatically, the oxygen sensor reading may shift. Zero the instrument
at a temperature within 30 °C [86 °F] of the work place temperature for the least ef-
fect.
Carbon Monoxide
Range 0 to 100 % LEL or 0 to 5 % CH
4
Resolution 1 % LEL or 0.05 % vol CH
4
Reproducibility 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]
Response time 90 % of final reading in less than or equal to 30 sec
[normal temperature range]
Warm-up Time 60 sec
Range 0 to 25 vol.% O
2
Resolution 0.1 vol.% O
2
Reproducibility 0.7 vol.% O
2
for 0 to 25 vol.% O
2
Response time 30 sec [normal temperature range]
3 min [extended temperature range]
Warm-up Time 60 sec
Cross-sensitivity to
5 % vol CO
2
20.9 % Vol O
2
[in ambient air]
Range 0 - 999 ppm [0-999 mg/m³] CO
Resolution 1 ppm [1.2 mg/m3] CO
for 0 to 500 ppm [0 to 580 mg/m3] CO

MSA altair 4 Specifications

General

Operating Temperature	-20°C to 50°C (-4°F to 122°F)
Ingress Protection	IP67
Type	Multi-gas Detector
Gases Detected	LEL, O2, CO, H2S
Display	LCD
Weight	Approx. 220g (with battery)
Sensor Type	Electrochemical (for H2S, CO, and O2); Catalytic Bead (for LEL)
Alarm Type	Audible, Visual, Vibrating
Detection Range	O2: 0-30% vol, LEL: 0-100% LEL, CO: 0-999 ppm, H2S: 0-500 ppm
Humidity Range	15% to 90% RH non-condensing
Certifications	UL, CSA, ATEX, IECEx