MSA altair 4 Service Manual

ContentsMSA
ALTAIR 4
GB
3
Contents
1 Safety Regulations ................................................................................................. 5
1.1 Correct Use .................................................................................................. 5
1.2 Liability Information ....................................................................................... 6
1.3 Safety and Precautionary Measures to be Adopted ..................................... 6
2 Description ............................................................................................................. 7
2.1 Instrument Overview ..................................................................................... 7
2.2 Device Hardware Interfaces ......................................................................... 8
2.3 On-Screen Indicators .................................................................................... 9
2.4 Battery Care ............................................................................................... 10
3 Disassembly/Assembly ....................................................................................... 11
3.1 General ....................................................................................................... 11
3.2 Disassembly ............................................................................................... 11
3.3 Assembly .................................................................................................... 12
4 Changing Components ....................................................................................... 13
4.1 Changing the Front Case ........................................................................... 13
4.2 Changing the Display ................................................................................. 13
4.3 Changing the Sensor Filters and the Sensor Gasket ................................. 14
4.4 Changing the Sensors ................................................................................ 14
4.5 Replacing the PCB and Battery assembly .................................................. 15
5 Instrument Setup ................................................................................................. 18
6 Calibration ............................................................................................................ 19
6.1 General ....................................................................................................... 19
6.2 Zero Calibration .......................................................................................... 19
6.3 Span Calibration ......................................................................................... 21
6.4 Fresh Air Setup [FAS] ................................................................................. 22

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