Dräger X-AM 5000, Instructions For Use Manual

Page: 19 / 264

19
During operation
– During operation, the measured values for every measured gas are displayed.
– If a measuring range is exceeded or a negative drift occurs, the following
displays are shown instead of the measured value display:
– Excess concentrations of flammable materials can lead to a lack of oxygen.
– At O
2
concentrations below 8 Vol.-%, on the Ex channel instead of the
measured value a fault is displayed with » « if the measured value is
below the pre-alarm threshold and the device is equipped with an O
2
sensor
(not with setting CH
4
with measuring range >100 %LEL).
– In the event of an alarm, the corresponding displays, including the visual,
audible and vibration alarms, are activated – see Chapter “Identifying alarms”.
.
After the measuring range of the TOX measuring channels has been exceeded
temporarily (up to one hour), checking the measuring channels is not necessary.
» « (measuring range exceeded) or
» « (measuring range not reached) or
» « (blocking alarm).
NOTICE
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
).
WARNING
When using a CatEx sensor in the Dräger X-am 5000, a calibration of zero
point and sensitivity must be carried out after an impact load that results in
a fresh air display not equal to zero.
Identifying alarms
An alarm is displayed visually, audibly and through vibration in a specific pattern.
Concentration pre-alarm A1
The pre-alarm A1 is not latching and stops when the concentration has dropped
below the alarm threshold A1.
In case of A1, a single tone is audible and the alarm LED flashes.
In case of A2, a double tone is audible and the alarm LED flashes twice.
Acknowledging the pre-alarm:
 Press the [OK] key; only the audible alarm and the vibration alarm are
switched off.
Concentration main alarm A2
After leaving the area, when the concentration has dropped below the alarm
threshold:
 Press the [OK] key; the alarm messages are switched off.
If the measuring range is exceeded significantly at the CatEx channel
(very high concentration of flammable materials), a blocking alarm is triggered.
This CatEx blocking alarm can be acknowledged manually by switching the
instrument off and back on again in fresh air.
In configuration setting CH
4
with measuring range 100 vol. %, no blocking alarm
is triggered as the heat conductance measurement principle is used.
Intermittent alarm:
Display
» A1 « and measured value alternating.
Not for O
2
!
Intermittent alarm:
Display
» A2 « and measured value alternating.
For O
2
: A1 = lack of oxygen
A2 = excess oxygen
WARNING
Leave the area immediately, Danger of Death! A main alarm is self-retaining
and cannot be acknowledged or cancelled.
WARNING
The measuring range 0 to 100 vol. % CH
4
is not suitable for monitoring
explosive mixtures in the measuring range from 0 to 100 %LEL.