MSA altair 4 Service Manual

CalibrationMSA
ALTAIR 4
GB
21
6.3 Span Calibration
To skip the Span procedure, push the S button.
If no button is pushed for 30 seconds, the instrument returns to the
Measuring mode.
(1) Once the Zero is set, the SPAN
screen displays.
(2) Connect the appropriate calibra-
tion gas to the instrument.
(3) Attach the calibration cap to the
instrument.
Z Insert tab on calibration cap
into slot on instrument.
Z Press calibration cap as
shown until it seats onto in-
strument.
Z Press both side tabs down
onto instrument until they
snap into.
Z Ensure that the calibration
cap is properly seated.
Z Connect one end of the tubing
to the calibration cap.
Z Connect other end of tubing to
the cylinder regulator [sup-
plied in the calibration kit].
(4) Open the valve on the regulator.
(5) Press the ON/OFF button to cali-
brate [span] the instrument.
Z LEDs flash
Z SPAN calibration starts.
H2S
CO
COMB/EX
O2
COMB/EX
O2
COMB/EX
O2

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