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Oxygen deficient atmospheres
The CatEx sensor may display false readings and incorrect
measured values when used for measurements in an oxygen
deficient atmosphere (<12 Vol% O
sensor cannot provide a reliable measurement.
► The CatEx sensor is intended to measure flammable
gases and vapours mixed with air (i.e. O
21 Vol%). If the O
content falls below 12 Vol% and an
2
operational O
sensor is available in the gas detector, a
2
channel error is triggered on the CatEx channel due to
oxygen deficiency.
► A CatEx sensor should preferably be operated with an
active XXS O
or O
PR sensor so that oxygen deficiency
2
2
can be evaluated by the gas detector.
► Remove the gas detector from the area and discontinue
measurement.
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
content falls below 12 vol. % and am
2
operational O
sensor is available, a channel error is
2
triggered on the CatEx channel due to oxygen deficiency.
Incorrect calibration
CAUTION: An incorrect calibration leads to incorrect
measured values.
► 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 be 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.
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.
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:
Instructions for use
|
X-am
). In this case the CatEx
2
content ≈
2
content ≈
2
®
3500
Alert icon Signal word
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 navigation
path in a menu.
This symbol indicates information that may make
the use of this product easier.
2.4
Glossary
Term
Description
Operation signal A periodic optical (green LED) and/or
acoustic signal.
Monitoring
Monitoring without pump (diffusion)
Monitoring with pump (with pump
adapter)
Capture range
The capture range refers to a measured
value range within which minor variations
in measured values (such as signal
noise, variations in concentration) do not
cause variations in the display. Measured
values outside the capture range will be
displayed with the actual measured
value.
Peak
Peak value
Quick bump test
Test for alarm triggering.
Conventions in this document
Consequences in case of
nonobservance
Indicates a potentially hazard-
ous situation. If not avoided, it
could result in death or serious
injury.
Indicates a potentially hazard-
ous situation. If not avoided, it
could result in physical injury. It
may also be used to alert
against unsafe practices.
Indicates a potentially hazard-
ous situation. If not avoided, it
could result in damage to the
product or environment.
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