D135-10-880C - Operation
Page 36
Measurement mode with bar graph
The display shows the leak rate in big digital figures, see Figure 10. The unit of the leak rate is
shown, too. Underneath the leak rate the inlet pressure is displayed in smaller digits. The
units of leak rate and pressure can be defined in the menu (see Units).
Below this the same leak rate is shown graphically as a bar. The scale of this bar, that is, the
number of decades included in this bar can be defined in the menu (see Display-range auto/
manual). The programmed trigger levels (see Trigger level 1 and Trigger level 2) are indicated
at the bar by short vertical lines: a straight line for trigger 1 and a dotted line for trigger 2.
Measurement mode with trend information
In trend mode the leak rates are displayed over time Figure 11. In addition the actual leak rate
and inlet pressure also are displayed digitally. The time axis can be defined in the menu (refer
to Time axis). The intensity axis (y-axis) is defined the same way as the bar graph (refer to
Display-range auto/manual).
Figure 11 Display: measurement mode with bar graph
First operation check
The steps for an initial operation are described here. It is explained how to switch on the
ELD500, how to measure and how to carry out an internal calibration.
If anything unexpected happens during the initial operation or the leak detector acts in a
strange way the ELD500 can be switched off by the mains switch at any time.
Needed equipment
The following parts will be needed:
A blind flange 25 KF (if not assembled at the inlet port).
A helium test leak with a DN 25 KF connection (optional).
A fore vacuum pump connected to the DN25 KF flange on the side or under the
bottom (dry or wet version) for use with the ELD500 FLEX
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