MSA altair 4 Service Manual

MSADisassembly/Assembly
ALTAIR 4
12
GB
Fig. 3 Instrument, open
3.3 Assembly
(1) Put the front case carefully into position onto the instrument body.
(2) Insert the four screws into the corners of the back case and tighten them care-
fully across the diagonal.
1 Display holder 5 Combustible sensor
2 Display fixing screws 6 Sensor gasket
3 Toxic sensor 7 Display
4O
2
sensor
6
2
1
7
345
Attention!
Check the position of all the components / component groups before as-
sembly.
After disassembly / assembly of the instrument it is necessary to test the
functionality, to calibrate the instrument and to check the settings on the
instrument [→ chapter 5].

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