General Information
Please read this document through carefully and familiarise yourself with the operation of
the product before putting it to use. Keep this documentation to hand so that you can
refer to it when necessary.
Symbols and what they mean
Symbol Meaning Remarks
Warning text: Danger! Please read warning carefully and take the
Danger to life precautionary measures specified.
if the precautionary measures
specified are not taken.
Warning text: Warnung! Please read warning carefully and take the
Serious physical injuries could occur if the precautionary precautionary measures specified.
measures specified are not taken.
Warning text: Caution! Please read warning carefully and take the
Light physical injuries or damage to property precautionary measures specified.
could occur if the precautionary
measures specified are not taken.
Important information. Pay particular attention.
Text Display text -
Definitions and Units
ppm = parts per million:
Common unit to describe gas concentrations. 1ppm corresponds to 1cm³ Gas in 1m³
air. 1ppm = 0.0001Vol.%, 1000ppm = 0.1 Vol.%.
Lower explosion limit:
At certain gas concentrations in the air, combustible gases reach a point at which there
is an explosion if exposed to ignition sources. This lower explosion limit (sometimes
referred to as lower ignition limit) is reached at different gas concentrations, depending
on the type of gas. Methane has a lower ignition limit of 4.0-4.4Vol.% (= 40000 to
44000ppm).
General Information
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