Dräger X-am 3500 Mode D'emploi page 30

en Conventions in this document
Oxygen-enriched atmospheres
Explosion protection is not guaranteed in oxygen-
enriched atmospheres (>21 vol. % O
► Remove the device from the potentially explosive
atmosphere.
Oxygen deficient atmospheres
Measurements in oxygen deficient atmospheres (<12
vol. % O ) may return incorrect displays on the CatEx
2
sensor. In this case the CatEx sensor cannot provide a
reliable measurement.
► Remove the device from the area.
CatEx sensor in oxygen deficient environment
Incorrect measured values may be displayed in an
oxygen deficient environment.
► The CatEx sensor is intended to measure flammable
gasses and vapours mixed with air (i.e. O
21 vol. %). If the O
2
and am operational O
channel error is triggered on the CatEx channel due
to oxygen deficiency.
Incorrect calibration
CAUTION: An incorrect calibration leads to incorrect
measured values.
► EU and CSA requirement (Canadian Standard
Association): The sensitivity must be checked daily
before first using the device, with a known
concentration of the gas to be measured that
corresponds to 25 to 50% of the final concentration.
The accuracy must amount to 0 to +20% of the
actual value. The accuracy can be corrected by
calibration.
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.
).
2
content ≈
2
content falls below 12 vol. %
sensor is available, a
2
2 Conventions in this
document
2.1 Meaning of the warning notes
The following alert messages are used in this document
to provide and highlight areas of the associated text
that require a greater awareness by the user. A
definition of the meaning of each alert message is as
follows:
Alert Signal word Consequences in case of
icon
WARNING
CAUTION
NOTICE
2.2 Trade marks
Brand Brand owner
Dräger
®
X-am
Bluetooth SIG, Inc.
®
Bluetooth
The brands listed are only registered in certain
countries and not necessarily in the country in which
this material is sold.
2.3 Typographical conventions
Text Text in bold identifies labels on the device
and text on the display.
► This triangle in warnings identifies the
options available for avoiding the hazard.
> The greater-than symbol identifies a naviga-
tion path in a menu.
non-observance
Indicates a potentially haz-
ardous situation. If not
avoided, it could result in
death or serious injury.
Indicates a potentially haz-
ardous situation. If not
avoided, it could result in
physical injury. It may also
be used to alert against
unsafe practices.
Indicates a potentially haz-
ardous situation. If not
avoided, it could result in
damage to the product or
environment.
®
X-am 3500