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I want to calibrate with 1.25% Methane to read 0-100% LEL for propane. What value should be entered during span calibration?

April 26, 2017calibrate lel methane propane read span value

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I want to calibrate with 1.25% Methane to read 0-100% LEL for propane. What value should be entered during span calibration?

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If calibrating with span gas of 1.25% methane, span the instrument to 40% LEL to read 0-100% LEL propane, Refer to formula and cal factor list in manual: CH4 span gas x Calibration factor = % LEL (1.25 x 32 = 40). You will need to know the type of gas expected to be released, if there is a release to do this properly.