Factory-Set Alarm Thresholds - MSA ALTAIR 5 Manuel D'utilisation

5.2 Factory-set Alarm Thresholds

NOTE: Units for Australia have slightly different alarm limits for COMB
and CO than shown below.
Sensor LOW
alarm
COMB 10% LEL
CO 25 ppm
H 2 S 10 ppm
O 2 19.5%
SO 2 2.0 ppm
NO 2 2.0 ppm
NH 3 25 ppm
PH 3 0.3 ppm
Cl 2 0.5 ppm
ClO 2 0.1 ppm
HCN 4.5 ppm
IR CO 2 0.5% Vol
(5%)
IRCO 2 0.5%Vol
(10 Vol%)
IR CO 2 0.5%Vol
(50 Vol%)
IR 15%LEL
Propane
(LEL)
IR 8% Vol
Pro-pane
(25% Vol)
IR 21% LEL
Butane
(LEL )
IR 8% Vol
Butane
(25% Vol)
IR 8% Vol
Methane
(25% Vol)
STEL and TWA not applicable for Combustible and oxygen gases.
1
5-2
HIGH Setpoint
alarm Min
20% LEL 5% LEL
100 ppm 20 ppm
15 ppm 5 ppm
23.0% 5.0%
5.0 ppm 2.0 ppm
5.0 ppm 1.0 ppm
50 ppm 10 ppm
1.0 ppm 0.3 ppm
1.0 ppm 0.3 ppm
0.3 ppm 0.1 ppm
10.0 ppm 2.0 ppm
1.5%Vol 0.2%Vol
1.5%Vol 0.2%Vol
1.5%Vol 0.5%Vol
29%LEL 9%LEL
15% Vol 5%Vol
50% LEL 11% LEL 100% LEL
15% Vol 5% Vol
15% Vol 2.5% Vol
STEL
Max
60% LEL --
1
950 ppm 100 ppm
175 ppm 15 ppm
24.5% --
1
17.5 ppm 5 ppm
17.5 ppm 5.0 ppm
75 ppm 35 ppm
3.75 ppm 1.0 ppm
17.5 ppm 1.0 ppm
0.9 ppm 0.3 ppm
20.0 ppm 10 ppm
5%Vol 0.5% Vol
8%Vol 0.5%Vol
50%Vol 0.5%Vol
100%LEL --
1
25%Vol --
1
--
1
25% Vol --
1
25% Vol --
1
TWA Default
Cal
Values
-- see
1
Section
5.6
25 ppm 60 ppm
10 ppm 20 ppm
-- 15.0%
1
2.0 ppm 10 ppm
2.0 ppm 10 ppm
25 ppm 25 ppm
0.3 ppm 0.5 ppm
0.5 ppm 10 ppm
0.1 ppm 0.8 ppm
4.5 ppm 10 ppm
1.5%Vol 2.50%
1.5%Vol 2.50%
1.5%Vol 15%
-- 35% LEL
1
-- 8%
1
-- 36% LEL
1
-- 8%
1
-- 20%
1