Dräger HFG 000 Series Technical Manual

Technical manual | X-am® 3500/8000 29
Operation
The displayed flushing time shows the minimum wait time required for the
measurement gas to reach the sensor from the sampling location in an ideal
scenario. This applies to the use of a Dräger sampling hose (fluoroelastomer,
brand new, dry, clean) with an internal diameter of 3 mm. Other fixtures (e.g.
pre-tube) extend the minimum wait time and must also be taken into
consideration. The flushing time only applies to the configured measurement
gas.
The flushing times recommended by the gas detector are ascertained according
to the state of technology. Dräger is not liable for their use. The user is responsible
for evaluating the wait time for their application. After the wait time expires,
evaluation is required to determine if the measured value is stable or if the wait time
was possibly insufficient. The same applies if the countdown was stopped
unexpectedly.
The measurement of other gasses or vapours than the selected measurement
gas per measuring channel causes additional wait time which must also be
considered in addition to the minimum wait time.
The confined space entry measurement is displayed when after the flushing time
is complete.
To end the confined space entry measurement:
1. Select during the confined space entry measurement and confirm the dialog.
 A dialog for performing another confined space entry measurement is
displayed.
2. Select to end the wizard.
3. Remove the pump adapter.
4. Return to normal measuring mode.
4.13 Carrying out leak searches with the wizard
During a leak search, the duration of the measurement (in mm:ss) is displayed for a
maximum of one hour in place of the time and the measured values can be
displayed in the form of a bar chart (configurable with the CC-Vision PC software).
Afterwards, the time is displayed again. The measurement duration is restarted
after each flow alarm.
During a leak search, the Clear app. peak feature should be stored in the quick
menu using the Dräger CC-Vision PC software. This feature can be used to delete
the application values in the bar chart.
Because of the physical flushing times, Dräger recommends carrying out
measurements with the leak search wizard without a hose/probe or with only a
short hose (max. 2 m).
Requirements:
– The gas detector is equipped with a pump and is switched on.
– All installed sensors are warmed up.
– The gas detector is ready to take measurements.

Dräger HFG 000 Series Specifications

General

Brand	Dräger
Model	HFG 000 Series
Category	Gas Detectors
Language	English