090-252 Rev A
2-1
2 CONTROL MODULE USER INTERFACE
The operation of the HHPC is through a system of menus; only a few keys are used in
each mode of operation. These will be explained as applicable for each mode.
2.1 Continuous Display Mode
Figure 1 shows a typical display for the Continuous Display mode. The current
values for temperature and density of the liquid are shown along with the current
mode and probe position.
System 6290
-159.45 °C 445.48 kg/m
3
Manual 20.002 m
Stop
Upper: Liquid
Lower: Liquid
LLL: 26.345 Current: N
Alarms:
Figure 1
2.1.1 Explanation of Values on Screen
The value at the top left is the current temperature indicated by the probe, and on
the top right is the current density. Below on the right is the current position of
the probe and on the left is the current mode and direction.
Next is the status of the level sensors, whether they are in liquid or vapor. On
the bottom is the last liquid level (LLL) and whether it is current or not. If the
probe is at the liquid/vapor interface and the current mode is "Auto" so that the
probe can track the liquid level, "Current" will be set to "Y"; otherwise "Current"
will be set to "N". The last line lists 2-digit abbreviations for current alarms.
Alarms are only reported when the system is in Auto, therefore no alarms are
currently listed.
2.1.2 Keys for Operation
There are several keys that can be used to operate the M6290 in this continuous
display mode. The three keys that may be used to drive the probe manually are
the UP arrow, the DOWN arrow, and STOP. The UP arrow causes the probe to
drive in the upward direction. If the probe is stopped, pressing UP one time
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