MSA altair 4 Service Manual

CalibrationMSA
ALTAIR 4
GB
19
6 Calibration
6.1 General
The device can be calibrated either manually using this procedure or automatically
using the GALAXY Test Stand. Refer to 9.1 of the appendix.
Calibration must be performed using a flow regulator with a flow rate set to
0.25 litres per minute.
If a battery charging cycle is interrupted before it is completed [4 hours for a fully
discharged battery], allow the instrument’s internal temperature to stabilise for
30 minutes before performing a Calibration.
6.2 Zero Calibration
(1) Press and hold the p button in Normal Operation mode for three seconds.
(2) If calibration lockout option is selected, enter password.
Z ZERO screen is then displayed.
Under normal circumstances MSA recommends calibration at least
every six months, however, many European countries have their own
guidelines. Please check your national legislation.
To skip the Zero procedure and move directly to the CalibrationSpan
procedure, push the S button. If no button is pushed for 30 seconds, the
instrument prompts user to perform a Span calibration before returning
to the Normal Operation mode.
Password
correct?
YES NO

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