Dräger X-am 8000 Mode D'emploi page 44

en Operation
4.7 During operation
WARNING
Danger to life and/or risk of explosion!
The following alarms indicate a danger to life and/or risk
of explosion:
– A2 alarm
– STEL or TWA alarm
– Device/channel error
► Immediately leave the hazard area.
WARNING
Incorrect measured values!
Only for diffusion mode: If water seals the gas inlets on
the gas detector (e.g. in heavy rain or if the gas detector
is submerged in water), incorrect measured values may
be returned.
► With the display facing downward, shake the gas
detector to remove the water.
WARNING
Incorrect measured values!
A different reading may be shown if the gas detector
experiences a considerable impact or a significant
vibration.
► When using a CatEx or IR sensor in the gas
detector, a zero-point and sensitivity calibration must
be carried out after experiencing an impact load that
results in a non-zero display when exposed to fresh
air.
► If a deviation of the measured value from the
calibration value of more than ± 5 % of the reading is
identified before confirming the span calibration of
the CatEx sensor, the sensor must be removed from
operation.
CAUTION
High readings outside of the LEL display range or a
blocking alarm may indicate an explosive
concentration.
If the concentrations of combustible materials are too
high, this may be the result of a lack of O
The max. flow rate of air in diffusion mode must not
exceed 6 m/s.
– The IP degrees of protection do not indicate whether
the device detects a gas during or after it was
exposed to the relevant ambient conditions. The
calibration and correct functioning of the device
must be checked in the event of dust deposits or
immersion/water spray.
– In the event of overgassing beyond the sensor's
measuring range, the zero-point and the sensitivity
must be checked and, if necessary, a calibration
must be performed.
– The PEAK, STEL and TWA evaluations are
interrupted if the menu is selected or in the case of
the special state of a pump leak test. For a flawless
calculation of the evaluations, only operate the gas
detector in normal measuring mode. Selecting the
quick menu has no influence on the PEAK, STEL
and TWA evaluations.
4.7.1 Monitoring measuring mode
In normal measuring mode, the measured values are
displayed for every measurement gas (see Graphic E
on the fold-out page). The operation signal sounds at
regular interval (configurable), and the green LED
pulses (e.g. visual operation signal or D-light feature).
If a measuring range is exceeded or not reached, the
respective symbol is displayed instead of the measured
value. For further information, see the following
chapter: "Symbol explanations", page 40
If, in measuring mode, a event (e.g. an alarm) occurs,
the respective symbol is displayed in the status bar
(after the event is acknowledged, if necessary).
4.7.1.1 Displaying the measuring channel
To display an individual measuring channel:
1. Select
2. Use ▲ or ▼ to view the individual measuring
channels.
3. Select
overview.
4.7.1.2 Opening the event report
The event report must be switched off in order to
comply with the requirements for the technical
suitability test.
.
2
If the gas detector is switched off and then on again,
the event report is deleted.
The following events are counted and displayed: A1/A2,
STEL, shocks, incorrect password entries.
To open the event report:
1. Select
measuring mode.
in measuring mode.
to navigate to the measuring channel
> Status > Device information in
®
X-am 8000