Conventions In This Document; Meaning Of The Warning Notes - Dräger X-am 2800 Gebrauchsanweisung

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Conventions in this document

Oxygen-deficient atmospheres
The CatEx sensor may display false readings and incorrect measured values
when used for performing measurements in an oxygen-deficient atmosphere
(<12 Vol% O ). In this case the CatEx sensor cannot provide a reliable
2
measurement.
► The CatEx sensor is intended to measure flammable gases and vapours
mixed with air (i.e. O
12 Vol% and an operational O
channel error is triggered on the CatEx channel due to oxygen deficiency.
► A CatEx sensor should preferably be operated with an active XXS O
so that oxygen deficiency can be evaluated by the gas detector.
► Remove the gas detector from the area or discontinue measurement.
NOTICE
Damage to the CatEx sensor!
Fractions of catalytic poisons in the measuring gas (e.g. volatile silicon, sulphur,
heavy metal compounds or halogenated hydrocarbon) can damage the Cat Ex
sensor.
► If the CatEx sensor can no longer be calibrated to the target concentration,
replace the sensor.
WARNING
Risk of explosion!
If the CatEx sensor is exposed to hydrogen and low temperatures (< -10 °C) for
a long time (> 1 h), measured values that are too low may be displayed. This
also applies if hydrogen is being measured but the measured gas set is not
hydrogen.
► The CatEx sensor should be set to the measured gas "hydrogen"for regular
and planned measurements of hydrogen. Measuring tasks which last less
than 30 min. are not affected by this.
2 Conventions in this document
2.1

Meaning of the warning notes

The following warning notes are used in this document to notify users of
possible dangers. The meanings of the warning notes are defined as follows:
38
content ≈ 21 Vol%). If the O
2
sensor is available in the gas detector, a
2
content falls below
2
X-am
sensor
2
®
2800