Dräger X-am 5000 Notice D'utilisation page 13

– All alarm setpoints A1 and A2 as well as »
for H S and CO are displayed in succession.
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– During the running-in period of the sensors, the respective display of the
measured value flashes and the special symbol »
played. No alarms are issued during the running-in period of the sensors. For
details on accelerated warm-up, see the Technical Manual.
– Press the [OK] key to cancel the display of the activation sequence.
Switching off the device
Press and hold the [OK] key and the [ + ] key simultaneously until the count-
down » 3 . 2 . 1 « shown in the display has elapsed.
– Before the device is switched off, the visual, audible and vibration alarms are
activated for a short time.
Before entering the workplace
Check and, if necessary, adjust the calibration before carrying out safety-
relevant measurements. A bump test must be performed according to the
national regulations.
Switch on the device. The current measured values are shown in the display.
– Observe any warning » « or fault messages »
The device can be operated normally. If the warning message does not
disappear automatically during operation, the device must be serviced
after the end of use.
The device is not ready to measure and requires maintenance.
The presence of catalyst poisons in the measured gas (e.g. volatile silicone,
sulphur, heavy metal compounds or halogenated hydrocarbons) can damage
the Cat Ex sensor. If the Cat Ex sensor cannot be calibrated to the target
concentration anymore, the sensor must be replaced.
The display of the Cat Ex sensor may be incorrect in an oxygen-poor
atmosphere.
Electrical operating safety (Ex protection) is not guaranteed in an oxygen-
enriched atmosphere.
Check that the gas inlet opening on the device is not covered.
1) Only when activated in the device configuration. Delivery status: not activated.
1)
« (TWA) and » « (STEL)
« (for warning) is dis-
CAUTION
«.
WARNING
1)
During operation
– During operation, the measured values for every measured gas are dis-
played.
– If a measuring range is exceeded or a negative drift occurs, the following dis-
plays are shown instead of the measured value display:
(concentration too high) or
» «
» « (negative drift).
– Concentrations of combustible materials that are too high, may result in a lack
of oxygen.
– For O concentrations below 8 vol. % a fault is indicated for the Ex channel
2
as » « instead of the measurement, if the measurement is below the
pre-alarm threshold (only if measuring range ≤100 %LEL, not for >100 %LEL
(heat conduction)).
– In the event of an alarm, the corresponding displays, the visual, audible and
vibration alarms are activated – see Chapter "Identifying alarms".
When the measuring range on the CatEx channel is significantly exceeded
(very high concentration of flammable substances), a latching alarm is trig-
gered. This CatEx latching alarm is acknowledged either automatically by a
functioning (i.e. free of warnings and malfunctions) oxygen channel or by
manually switching the unit off and on again in fresh air.
No latching alarm is triggered when the measuring range is exceeded in the
"Methane" configuration setting, as the unambiguity of the indication for
methane is ensured by a separate measurement of thermal conductivity.
After exposition to concentrations above 100 %LEL, the indication displayed at
the CatEx channel may be incorrect. Before any further use of the device within
the concentration range from 0 to 100 %LEL, check and, if necessary, adjust
the zero point and the sensitivity.
After the measuring range of the TOX measuring channels has been exceeded
temporarily (up to one hour), checking the measuring channels is not necessary.
When using a CatEx sensor in the Dräger X-am 5000, the zero point and
sensitivity must be adjusted after any extreme impact loading.
WARNING
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