Ir Ex Sensor: Activating Second Ex Measuring Channel; Changing The Gas; Maintenance; Maintenance Intervals - Dräger X-am 8000 Gebrauchsanweisung

When the H added signal is activated, the LEL gas
2
concentrations of both selected sensors are added together
and the result is shown in the display in the place of the IR Ex
display.
added signal is displayed with a + next to the
An activated H
2
gas name of the IR Ex sensor in the display.
Previously set alarm thresholds are maintained in order to
ensure that in the presence of hydrogen (H
IR Ex Channel is triggered earlier if required.
4.20 IR Ex sensor: Activating second Ex
measuring channel
A second Ex measuring channel can be activated for the IR
Ex sensor using the Dräger CC-Vision PC software.
An H offset is only possible with an IR-Ex channel (with
2
measuring range 0 to 100 % LEL).

4.21 Changing the gas

This feature is not part of the technical suitability test.
The gas change remains even after restarting the gas
detector.
The measuring gas for the supported sensors can be
changed on the gas detectors with this feature.
The data stored in the statistics counters are lost when the
gas is changed. The Dräger GasVision PC software can be
used to manually view the data via the data logger at a later
point in time. Automatic notifications via the X-dock Manager
may only be available to a limited extent.
Limitations to the combination of measured and calibration
gas are applied based on the sensor data set.
During a calibration, all gases are calibrated with a cross
calibration available in this function. Cross calibration is less
accurate than target gas calibration.
Special features of IR sensor:
– The feature is not available for methane as the measured
gas.
– You cannot switch from any gas to methane.
– To use methane and other Ex gases at the same time, the
second Ex measuring channel can be activated. For
further information see: "IR Ex sensor: Activating second
Ex measuring channel", page 45.
Requirements:
– The gas detector is switched on.
– The user is signed in with the corresponding user level.
– In order to be able to use the full functionality, the test gas
set for the calibration and the bump test must be the same
(e.g. methane for CatEx).
To change a measured gas:
1. Sign in with the required user level, if necessary.
Instructions for use |
X-am
) the alarm of the
2
®
8000
2. Select > Switch gas in measuring mode (if configured
using the Dräger CC-Vision PC software).
 A list of the supported sensors with the current
measured gas is displayed.
3. Select sensor.
 A list of available measured gases is displayed.
4. Select new measured gas.
 Alarm thresholds and LEL factor of the new measured
gas are displayed.
5. Confirm to return to normal measuring mode.
5

Maintenance

5.1

Maintenance intervals

Test
Inspection and maintenance
by specialists.
Check signalling elements
with the signal test
For inspections and maintenance, see:
– EN 60079-29-2 – Guidelines for selection, installation, use
and maintenance of instruments for the detection and
measurement of flammable gases and oxygen
– EN 45544-4 – Electrical apparatus used for the direct
detection and direct concentration measurement of toxic
gases and vapours – Part 4: Guide for selection,
installation, use and maintenance
– National regulations
5.2

Calibration intervals

Observe the relevant specifications in the Sensor Handbook
or in the instructions for use/data sheets of the DrägerSensors
installed.
Recommended calibration intervals for DrägerSensors:
DrägerSensor
CatEx, O , H S, H S LC, CO
2 2 2
LC, SO , NO
2 2
IR Ex/CO (ES) (HC)
2
1) 1)
PID HC , PID LC ppb
Other DrägerSensors
Maintenance
Interval
Every 12 months
Automatically each time the
device is started or manually
Calibration interval
Every 6 months
Every 12 months
For certified measuring func-
tion: Every 6 months
Depending on the applica-
tion conditions, daily calibra-
tion may be necessary. The
interval can be extended lit-
tle-by-little to 30 days if there
are no calibration deviations
on consecutive inspections.
See the special data sheets
for the respective sensors.
|
en
45