Agilent Technologies 400/54 Premium Shielded NMR Magnet System - Page 83

Agilent E5025 Cryogen Monitor 5
400/54 Premium Shielded NMR Magnet System Product Overview 81
three date- time events.
Progress bar
The progress bar displays the current level of the
corresponding Cryogen (% of maximum level). The color of
the indicator changes when the level falls within the range
of one of three set- point values:
History button
When you press the Nitrogen or Helium History button, a
graph of the level history for the associated Cryogen is
displayed. See “N
2
and He Level history plot windows” on
page 82.
Update button
When you press the Update button, the software rereads the
level history file and updates any open plots and date event
values. Under normal operation, this reading is only done
when the application starts up or every hour while the
interface is open.
Date-Time events
This pull- down menu and associated text field can be used
to display one of three cases:
Fill (green) The level where the Cryogen is scheduled
to be refilled during normal maintenance.
Warn (yellow) Indicates that the level dropped below a
threshold that is considered to be worthy
of attention (but not necessarily critical).
Alert (red) Indicates that the level dropped below a
level where there can be serious
consequences (such as a magnet quench)
unless immediate action is taken.
Last The date and time of the last level measurement
in the log file.
First The date and time of the first- level measurement
in the log file.