During Operation; Monitoring Measuring Mode - Dräger X-am 3500 Gebrauchsanweisung

The gas detector can be switched on again in the charging
cradle and is then supplied with electrical current during
operation.
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.
As an option, the Dräger CC-Vision PC software can be
used for adjustment so that any impact detected leads to a
channel error for all sensors. These channel errors are
deleted after calibration. If the sensor should be irreparably
damaged, then this could result in a calibration error.
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
Instructions for use |
X-am
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2
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3500
The IP degrees of protection do not indicate whether the
device detects a gas during or after it was exposed to it.
Check the calibration and functional integrity of the device in
the event of dust deposits and contact with water through
submersion or a water jet.
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.
A distance of at least 5 m to compasses must be complied
with if the gas detector is used for offshore applications.

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 28
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 in measuring mode.
2. Use ▲ or ▼ to view the individual measuring channels.
3. Select to navigate to the measuring channel overview.
4.7.1.2 Opening the event report
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 > Info > Device information in measuring
mode.
2. Use ▲ or ▼ to scroll through the individual pages until the
event report.
The symbol indicates a failed sign-on only after 5
attempts.
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