Dräger X-am 8000 Mode D'emploi page 37

X-am 8000: Increased hydrogen concentrations
within the measuring range of the DrägerSensor XXS
H HC may result in false alarms due to the additive
2
effect on the DrägerSensors XXS H
XXS H S-LC and XXS CO-LC as well as due to the
2
negative effect on the DrägerSensor XXS O
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.
RFID tag (optional)
► The RFID tag must not be read out in explosion-
hazard areas.
X-am
S and XXS CO,
2
.
2
).
2
content ≈
2
content falls below 12 vol. %
sensor is available, a
2
®
8000
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.
DrägerSensor CatEx 125 PR (6812950) and
CatEx 125 PR Gas (6813080)
► For this gas detector, only use sensors with serial
numbers > ARLB XXXX (starting with date of
manufacture in February 2018). These sensors are
certified for use in zone 0, T4.
When using the PID sensor
► To ensure safe operation, the gas detector must not
be switched on at temperatures below -10 °C when
using the PID sensor (6813475/6813500).
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
Conventions in this document
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.
en