Dräger X-am 3500 Notice D'utilisation page 34

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Operation
The following options are available:
Option
Messages
Device information
Gas statistics
Intervals
Capture ranges
Battery
Approvals
(X-am 8000 only with the
Bluetooth® module)
34
Description
The pending warnings and
errors are displayed. For a
description of the messages
and remedial measures, see
the technical manual.
Device information and infor-
mation about the Bluetooth®
module (optional, X-am 8000
only) is displayed (e.g. MAC
address, serial number, firm-
ware version etc.).
The following gas statistics
are available:
– Select Shift peak to dis-
play the exposure peaks
for all gasses.
– Select Application peak
to display the application
peaks for all gasses.
– Select TWA values to
display the available TWA
values for all gasses.
– Select STEL values to
display the available
STEL values for all gas-
ses.
The following intervals are
available:
– Select the bump test
interval (Bump test inter-
val) (if configured) to dis-
play the days remaining
until the next bump test
for all channels. For
details, select and confirm
the respective channel.
– Select Calibration inter-
val to display the days
remaining until the next
calibration for all chan-
nels. For details, select
and confirm the respec-
tive channel.
– Select Life time to dis-
play the remaining ser-
vice life.
Capture ranges are displayed
(if configured).
The battery state of charge is
displayed (large).
Approval information is dis-
played (e-Label).
4.10 Measuring
4.10.1 Special features when measuring with the
pump
NOTICE
Magnetic media may be damaged!
The pump adapter and calibration adapter contain a magnet
which may delete data from a magnetic stripe.
► Do not bring magnetic media (e.g. credit cards) into close
proximity to the pump adapter or calibration adapter.
The pump adapter "Nona" (order no. 3720225) must be
used to meet the requirements of the technical suitability test
(EN 60079-29-1) for measuring the gas "Nonan" with a pump.
This also achieves an optimised flushing phase.
When using long hoses (from 10 m):
– Ensure strain relief for the weight of the hose.
– Make sure that the intake hose is not kinked.
– The max. hose length is 45 m (with an internal diameter of
3 to 5 mm).
– Use the dust and water filters when taking measurements
with the pump (order no. 83 19 364).
– The nominal flow rate is 0.35 L/min.
– The flow alarm is triggered if the flow rate is <0.3 L/min.
– Following a bump test with aggressive gases (such as
biogas or chlorine), flush the pump with clean air for
several minutes to extend the service life of the pump.
– A test of the response time with target gas is
recommended.
Flush the Dräger sampling hose or Dräger probes prior to
each measurement with the gas to be measured. The flushing
phase is necessary to reduce negative effects associated with
the use of a sampling hose or a probe, e.g. gas transport time,
memory effects, dead volume. The duration of the flushing
phase depends on factors such as type and concentration of
the gas or vapour to be measured as well as material, length,
diameter and age of the sampling hose or probe. In addition to
the flushing time, the sensor response time must be observed
(refer to the instructions for use for the DrägerSensors used).
Generally, when using a sampling hose (3 mm internal
diameter, new, dry, clean) with standard gasses, a typical
flushing time of approx. 3 s/m can be assumed.
Example:
The flushing time for oxygen with a 10 m hose is approx.
30 seconds. The assumed sensor response time is approx.
10 seconds in addition. Thus, the overall time before reading
the gas detector is approx. 40 seconds.
A flow-rate alarm is delayed by 10 to 30 seconds depending
on the length of the hose.
4.10.2 Making measurements with the pump
Requirements:
– The gas detector is equipped with a pump and is switched
on.
– All installed sensors are warmed up.
Instructions for use
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X-am 3500