During Operation - Dräger X-am 2500 Instructions For Use Manual

Operation
3. Check that the gas inlet opening on the instrument is not covered
or dirty.
WARNING
!
Explosion hazard! To reduce the risk of flammable or
explosive atmospheres igniting, it is essential that the
warning notices below are observed:
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, the sensor must be replaced.
In case of measurements in oxygen-deficient atmosphere

(<8 Vol.-% O ) the CatEx sensor may show incorrect
2
displays; in this case, a reliable measurement with a
CatEx sensor is not possible.
In an oxygen enriched atmosphere (>21 Vol.-% O

explosion protection cannot be guaranteed; remove
instrument from the Ex area.
High values outside the display area indicate an

explosive concentration where applicable.
4.5

During operation

During operation, the measured values for every measured gas

are displayed.
If a measuring range is exceeded or not reached, the following

displays are shown instead of the measured value display:
» « (measuring range exceeded) or
» «(below measuring range) or
» «(blocking alarm)
24
Excess concentrations of flammable materials can lead to a lack

of oxygen.
At O concentrations below 8 Vol.-%, on the Ex channel instead of

2
the measured value a fault is displayed with »
measured value is below the pre-alarm threshold and the device
is equipped with an O
In the event of an alarm, the corresponding displays, including the

visual, audible and vibration alarms, are activated, see chapter 4.6
on page 25.
NOTICE
i i
Special states in which there is no measuring operation
(quick menu, calibration menu, warm-up of sensors,
password input) are indicated by a visual signal (slow flashing
of the alarm LED
), the
WARNING
2
!
If a CatEx sensor is used in the Dräger X-am 2500,
a calibration of zero point and sensitivity must be carried out
after experiencing an impact load that results in a non-zero
display when exposed to fresh air.
After the measuring range of the TOX measuring channels has been
exceeded temporarily (up to one hour), checking the measuring
channels is not necessary.
sensor.
2
).
Dräger X-am 2500
« if the