Varian 990 dCLD II, Operation Manual

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Model 990 dCLD II Component Leak Detector
4-1
Section 4. Setup and Monitor Operations via the
Optional Front Control Panel
The Optional Front Control Panel of the 990 dCLD II is shown in Figure 4-1. It can be
mounted remotely from the control unit or directly onto the front face of the unit. Operation
controls include control buttons and a touch panel for the initial setup of the leak detector.
A three-position access key switch is also provided to prevent unauthorized changes of the
system setup commands.
Figure 4-1 990 dCLD II Optional Front Control Panel
➀
Touch Screen Panel The touch screen panel provides a convenient menu interface to
set up the 990 dCLD II and displays information about the system
while it is running.
➁
Leak Rate Display The bar graph displays the leak rate in one of two forms:
❑
A mantissa on the bar and a numerical exponent
❑
Just the bar as a logarithmic bar graph display
The label at the right of the bar graph changes to indicate the cur-
rent mode of operation: LOG or LIN. When in LOG, the values
above the bar graph display the log scale 10
−
11
to 10
−
0
; when in
LIN, values below the bar graph display the linear scale 0 to 10.
If the leak rate goes below the zero point that has been set, UNDER
displays at the left of the bar graph. If the leak rate goes above the
highest set point, OVER displays at the right of the bar graph.
➂
Spec-Tube
Pressure Display The bar graph displays the pressure in the spectrometer tube. The
graph changes color to indicate more or less favorable conditions.
➀ ➁
➂
➃
➄ ➅ ➆ ➇ ➈
➈