Factory-Set Alarm Thresholds - MSA Altair 5X Mode D'emploi

5.2 Factory-set Alarm Thresholds

SENSOR LOW
ALARM
COMB 10% LEL
CO 25 ppm
H 2 S 10 ppm
O 2 19.5%
SO 2 2.0 ppm
NO 25
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
(10% Vol)
IR --
2
Propane
(100% Vol)
IR 8% Vol
Butane
(25% Vol)
IR --
2
Methane
(100% Vol)
STEL and TWA not applicable for combustible and oxygen gases.
1
No alarm thresholds are possible for the 0-100% Vol Methane and Propane IR sensors.
2
In environments with >100% LEL combustible gas present, units with a catalytic combustible
LEL sensor will be in a latching over-range alarm, and the 100% Vol IR sensors will
display the % Vol gas reading.
5-2
HIGH
ALARM MIN
20% LEL 5% LEL
100 ppm 10 ppm
15 ppm 5 ppm
23.0% 5.0%
5.0 ppm 2.0 ppm
100 10
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
-- --
2 2
15% Vol 5% Vol
-- --
2 2
SETPOINT
MAX
60% LEL
1700 ppm
175 ppm
24.0%
17.5 ppm
200
17.5 ppm
75 ppm
3.75 ppm
7.5 ppm
0.9 ppm
20.0 ppm
8% Vol
--
2
25% Vol
--
2
STEL TWA
-- --
1 1
100 ppm 25 ppm
15 ppm 10 ppm
-- --
1 1
5 ppm 2.0 ppm
25 25
5.0 ppm 2.0 ppm
35 ppm 25 ppm
1.0 ppm 0.3 ppm
1.0 ppm 0.5 ppm
0.3 ppm 0.1 ppm
10 ppm 4.5 ppm
0.5% Vol 1.5% Vol
-- --
1 1
-- --
1 1
-- --
1 1