15
Observe the following during measuring
mode with pump
z Wait for the flushing time to elapse:
Before every measurement, flush the Dräger
sampling hose or the Dräger probes with the air
sample to be measured.
– A flushing phase is necessary to eliminate or
minimise all effects associated with the use of a
sampling hose or a probe, e. g. absorption in the
hose, dead volume.
– The duration of the flushing phase depends on
factors such as type and concentration of the gas or
vapour to be measured, material, length, diameter,
and age of the sampling hose or probe. Generally,
when using a sampling hose (new, dry, clean), a
typical flushing time of approx. 10 seconds is
required for each metre. This flushing time applies in
addition to the sensor response time (see the
Instructions for Use for the gas detection instrument
used).
Example:
– In the case of a 10 m sampling hose, the flushing
time is approx. 100 seconds and the sensor
response time is in addition approx. 60 seconds.
Therefore, the total time before reading the gas
detection instrument is approx. 90 seconds.
– The flow-rate alarm is delayed by 10 to 30 seconds
depending on the length of the hose.
Replacing the filter
z Unscrew the connecting bush from the filter.
z Unfasten the lock at the holder (pump).
z Remove the holder (pump).
z Place the holder (pump) onto the housing.
z Fasten the lock at the holder (pump).
z Screw the connecting bush onto the new filter.
Device configuration
To individually configure a standard-configuration
device, connect the device to a PC.
Communication is carried out via the USB DIRA dongle
(order no. 83 17 409).
The Dräger CC-Vision PC software is used to perform
the configuration.
The following settings can be configured, among others:
– Horn volume
– Wireless function
– Alarm frequencies
– Alarm pattern
– Alarm forwarding
– Life signal (light pattern, horn volume)
– Bump test volume
(Default setting: 80 dB (A))
– Actions of the switch relay
z Unscrew the filter anti-
clockwise.
z Screw a new filter
(order no. 83 19 359)
onto the device in a
clockwise direction.
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