Operation of the UL1000 and UL1000 Fab
51
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5
.f
m
te
chn
ica
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40
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5.4.4
Numerical Display Mode
The display shows the leak rate in big digital figures, see
. 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 Chapter
).
Below this the same leak rate is shown graphically as a bar. The scale of this bar, i.e.
the number of decades included in this bar can be defined in the menu (Please refer
to Chapter
). The programmed trigger levels
(Please refer to Chapters
and
) are indicated at the bar by short vertical
lines: a straight line for trigger 1 and a dotted line for trigger 2.
In addition the inlet pressure is displayed in smaller figures above the bargraph.
5.4.5
Trend Mode
In trend mode the leak rates are displayed over time
. In addition the actual
leak rate and inlet pressure also are displayed digitally. The time axis can be defined
in the menu (Please refer to Chapter
). The intensity axis (y-axis) is
defined the same way as the bargraph (Please refer to Chapter
ff).
Fig. 5-2: Display, trend mode