Operational Characteristics
16
Substitute Gas Calibration
The infrared gas transmitter Dräger PIR 3000 can also be used to measure other
gases and vapours. The following table shows the required information (see also
"Calibration" on page 11).
Measured gas
1)
1) The measuring function for the explosion protection according to EN 60079-29-1 is proven, see EC-Type Examination certificate
BVS 05 ATEX E 143X and associated additions.
CAS-No. Measuring range
1)
[%LEL]
Gas Category
Substitute Gas
Calibration
factor
2)
3)
2) The LEL values were used according to IEC 60079-20-1. Other LEL values may apply for the device settings at the location of use.
3) Typical tolerance: ±5 %.
Response time
t
0...50
acetone 67-64-1 0 to 100 ethylene 0.7 ≤ 24 s
i-butane 75-28-5 0 to 100 propane 1.6 ≤ 21 s
n-butane 106-97-8 0 to 100 propane 1.2 ≤ 23 s
ethanol 64-17-5 0 to 100
4)
4) When the following substances are measured at concentrations above 70 % LEL, the deviations of the measured values exceed the
permitted deviations in accordance with EN 60079-29-1.
propane 0.9 ≤ 21 s
ethyl acetate 141-78-6 0 to 100 ethylene 0.4 ≤ 35 s
ethyl acetate 141-78-6 0 to 100
4)
propane 1.4 ≤ 35 s
n-hexane 110-54-3 0 to 100 propane 1.8 ≤ 32 s
methanol 67-56-1 0 to 100
4)
ethylene 0.2 ≤ 21 s
n-nonane 111-84-2 0 to 100 propane 1.9 ≤ 89 s
n-Octane 111-65-9 0 to 100 propane 1.8 ≤ 67 s
n-pentane 109-66-0 0 to 100 propane 1.5 ≤ 28 s
i-propyl alcohol 67-63-0 0 to 100 propane 1.3 ≤ 24 s
propene (propylene) 115-07-1 0 to 100 ethylene 0.4 ≤ 19 s
toluene 108-88-3 0 to 100 ethylene 0.6 ≤ 49 s
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