MSA PrimaX - Page 41

Reference calibration example for 50% Methanol:
(1) Relative response factor for Methanol from table = 0.62
(2)
Propane calibration gas concentration being used
C
3
H
8
= 0.89Vol%
(3) Propane volume concentration for 100% LEL = 1.7Vol%
(4) Propane calibration gas concentration in % LEL
= 52.4% LEL
(5) Gas detector span setting = 52.4% LEL x 0.62 = 32.5% LEL
41 PrimaX GB
6 Technical Data