sewerin EX-TEC PM 4 - Response Times

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7 Technical data
z Alarm thresholds (as delivered, depending on tted sensors)
Alarm Gas concentration,
factory setting
Operator guidance by
Application Sensor (operating
mode)
AL1
10 % LEL House, Enclosed
spaces, Warning
Gas detection,
Gas warning
AL2
50 % LEL House, Enclosed
spaces, Warning
Gas detection,
Gas warning
AL3 100 % LEL (end of
measuring range)
Warning Gas warning
AL4
0.5 % vol. Automatic
AL5 100 % vol. Measuring Gas measuring
7.3 Response times
z Response times of EX-TEC PM 4 (pump devices)
– ppm range: t
90
< 7 s for methane (CH
4
)
t
90
< 7 s for propane (C
3
H
8
)
t
90
< 7 s for butane (C
4
H
10
)
t
90
< 7 s for hydrogen (H
2
)
– LEL range: t
50
< 5 s for methane (CH
4
)
t
50
< 6 s for propane (C
3
H
8
)
t
90
< 12 s for methane (CH
4
)
t
90
< 16 s for propane (C
3
H
8
)
t
90
< 3 min for hexane (C
6
H
14
)
t
90
< 3 min for nonane (C
9
H
20
)
t
90
< 3 min for kerosene (JFUEL)
t
90
< 12 s for acetylene (C
2
H
2
)
– % vol. range: < 10 s
Probes increase the stated response times.