82 400/54 Premium Shielded NMR Magnet System Product Overview
5 Agilent E5025 Cryogen Monitor
N
2
and He Level history plot windows
These plot windows are the same for N2 and He and are
opened by pressing the History button in the corresponding
control line in the main interface panel:
Figure 25 Helium level history plot
• The black trace displays the level history with solids
points showing where an actual measurement was taken.
Helium levels are measured at eight hour intervals.
Nitrogen levels are measured every hour.
• The vertical (Y) axis shows percent capacity and the
horizontal (X) axis shows time (and date).
• The three colored traces (fill, warn, and alert) show the
corresponding levels and can be set independently for N
2
and He from the “master” application interface.
• Resize the plot windows by dragging one of the four
corners following a left mouse button click.
• To expand a region of the data (zoom in), draw a
rectangle in a down right direction using a left mouse
click- and- drag operation.
• To zoom out (expand) draw a rectangle in the reverse
order (that is, draw a rectangle using an up- left motion).
Fill The date and time where the level is predicted to
drop to the normal maintenance “Fill” level. The
fill date is estimated by using the current time
and the slope from the last fill event in the
history file.
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