22
8.2.1.2
Metrological data
Type
VQ1
Maximum concentration
100% LEL
Principle
Catalytic
Estimated service life
> 36 months
Storage
Away from air -10°C < T < 35°C
10% < RH < 60%. Maximum 6 months
Continuous temperature range
-20°C to +55°C
Humidity range
0% RH to 95% RH
Pressure range
1 bar ± 10%
Linearity variance (methane scale)
Between 0% and 70% LEL:
1% LEL
Between 70% and 100% LEL:
7% LEL
Measurement reproducibility
± 2% of the value measured, or ± 1 LEL
(or ± 0.05% CH4)
Long-term drift
in normal
operating
conditions
Zero point:
Sensitivity:
Methane
Propane/Butane
< 5% methane LEL per year
Typical drift values
< 20% of the value measured per year
< 10% of the value measured per year
Effect of humidity (10% to 90% RH) at
40°C
± 5% of relative sensitivity
Maximum recommended interval between
calibrations (normal operating conditions)
6 months
Calibration concentration
30– 80% LEL
Response time
(may vary ± 10%
between sensors)
gas and
concentration
injected
Methane
(50% LEL)
Hydrogen
(50% LEL)
Pentane
(52% LEL)
Styrene
(45% LEL)
t25
4 sec
3 sec
8 sec
12 sec
t50
8 sec
6 sec
12 sec
40 sec
t90
15 sec
10 sec
27 sec
60 sec
Содержание OLC 20
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