MSA altair 4 Service Manual

MSADescription
ALTAIR 4
8
GB
2.2 Device Hardware Interfaces
Instrument operation is dialog driven from the display with the aid of the three func-
tion buttons [see Fig. 1].
Button Definitions
LED Definitions
Button Description
ON/OFF The ON/OFF button is used to turn instrument on or off and to con-
firm user action selections.
When the S button and the ON/OFF button are pressed simultane-
ously for instrument start-up, the Options Setup Mode displays.
T The T button is used to move forward through data screens in
measuring mode, or as page back and to decrease the values in
set-up mode. Holding this button for 3 seconds while in Normal
Measure Mode will activate the InstantAlert alarm.
S The S button is used to reset peak, STEL TWA and acknowledge
alarms [where possible] or access calibration in measuring mode. It
is also used as page up or to increase the values in set-up mode.
LED Description
GREEN The Safe LED flashes once every 15 seconds to notify the user that
the instrument is on and operating.
This option can be turned off through the MSA Link software.
RED The red LEDs are visual indications of an alarm condition or any
type of error in the instrument.

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