MSA altair 5, Инструкция по эксплуатации, Страница: 61 / 245

NOTE: No alarm thresholds are possible for the 0-100% Volume
Methane, Propane and Butane IR sensors. In environments with
>100% LEL combustible gas present, units with a combustible
LEL sensor will be in a latching over-range alarm, and the
100% volume IR sensors will display the % volume gas reading.
5.3 Sensor Performance Specifications
PRIMARY SENSORS
Sensor Display Range Resolution Reproducibility Response Time
Com- 0-100% LEL 1% LEL or Normal temp. range: t(90) ≤30 sec
bustible or 0-5% CH4 0.05% vol <50% LEL: 3% LEL (normal temp.)
(LEL) CH4 50-100% LEL: 5% LEL
<2.5% CH4: 0.15% CH4
2.5-5.00% CH4: 0.25% CH4
Extended temp. range:
<50% LEL: 5% LEL
50-100% LEL: 8% LEL
<2.5% CH4: 0.25% CH4
2.5-5.00% CH4: 0.40% CH4
Oxygen 0-25% O2 0.1% O2 0.7% O2 for 2 - 25% O2 t(90) ≤ 30 sec
(normal temp.)
t(90) ≤ 3 min
(extended temp.)
Carbon 0-1000 1 ppm CO, Normal temp. range: t(90) ≤60 sec
Mon- ppm CO 0-300 ppm CO: (normal temp.)
oxide ±5 ppm or 10% of reading,
whichever is greater;
>300 ppm CO: ±15ppm
Extended temp. range:
±10 ppm or 20% of reading,
whichever is greater
Hydro- 0-200 1 ppm H2S, Normal temp. range: t(90) ≤60 sec
gen ppm H2S 3-200 0-100 ppm H2S (normal temp.)
Sulfide ppm H2S ±2 ppm H2S
or 10 % of reading,
whichever is greater;
>100 ppm H2S:
±15 ppm H2S
Extended temp. range:
±10 ppm or 20% of reading,
whichever is greater
5-3