Dräger X-am 3500 Mode D'emploi page 36

en Operation
4.6 Preparations for operation
WARNING
Serious damage to health!
An incorrect calibration can lead to incorrect measured
values, which may result in serious damage to health.
► Before performing safety measurements, check the
calibration by way of a bump test, adjust as
necessary, and check all alarm elements. If national
regulations exist, the bump test must be performed
in accordance with these regulations.
WARNING
Risk of explosion
Only applicable if using the Dräger CSE Connect app:
The use of an unsuitable smartphone or accessories
may lead to the ignition of flammable or explosive
atmospheres.
► The smartphone on which CSE Connect is installed
must be suitable and approved for use in explosion-
hazard areas.
► A list of compatible smartphones is available from
Dräger.
► Only use accessories that are suitable for use in
areas subject to explosion hazards.
1. Switch on the gas detector. The current measured
values are shown in the display.
2. Observe warnings, error messages and special
states.
3. Verify that the gas inlet openings and membranes
are clean, freely accessible, dry and undamaged.
4. Check that the date and time are set correctly.
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.
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X-am 3500