MSA altair 4 Service Manual

CalibrationMSA
ALTAIR 4
GB
23
Fig. 6 Fresh Air Setup
If this option is enabled, the instrument displays "FAS?", prompting the user to per-
form a Fresh Air Setup [FAS CAL].
(3) Press the S button to bypass the Fresh Air Setup.
Z The Fresh Air Setup is skipped and the instrument goes to the Measuring
page [Main page].
(4) Press the ON/OFF button within 10 seconds to perform the Fresh Air Setup.
Z The instrument starts the FAS.
Z The screen shows a No Gas Symbol, a blinking hourglass, and all enabled
gas sensor readings.
Z At the end of the FAS Calibration, the instrument displays "FAS OK" or
"FAS ERR". along with the flags of the sensors that were outside of the
FAS limits. All sensors that are within the FAS limits will be zeroed.
If a battery charging cycle is interrupted before it is completed [4 hours
for a fully discharged battery], allow the instrument’s internal tempera-
ture to stabilize for 30 minutes before performing a Fresh Air Setup.
COMB/EX
O2
H2S
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