Factory-Set Alarm Thresholds - MSA ALTAIR 5 Manual De Funcionamiento

5.2 Factory-set Alarm Thresholds

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