090-252 Rev A
3-2
The upper level sensor cannot be checked for a short circuit, since this is how
bottom reference is indicated. If the system indicates bottom reference falsely, it is
possible that the upper level sensor is actually shorted.
There are four keys that may be used to exit the continuous display mode. Pressing
ESC (escape) is the same as pressing MAIN, which will bring up the Main Menu.
Pressing EDIT will bring up the Edit Menu, and pressing CMND will bring up the
Operator Command menu. All other keys are invalid in the Continuous Display
mode and will be rejected.
3.2 Signal Conditioning Card Menus
There are three separate menus available for the Signal Conditioning Card. Each is
accessed through a key on the HHPC front panel. Pressing "MAIN" will bring up the
SCC Main Menu. Pressing "EDIT" brings up the Edit SC Parameters menu, where
Signal Condition Card parameters can be changed. Pressing "CMND" brings up the
A/D Converter menu, which is also available through the SCC Main Menu.
Once inside the menus, use the numbers to choose a menu option and press Enter
to activate that option. Pressing ESC will cause the display to return to the previous
menu, and if pressed repeated, eventually back to the Continuous Display Mode.
3.2.1 SCC Main Menu
Pressing "MAIN" brings up the SCC Main Menu. This menu provides access to
various displays and options for maintenance functions.
3.2.1.1 Option 1, Basic Units
This option gives the display of basic units as described above. This is the
default display in the continuous display mode for the Signal Conditioning
Card.
3.2.1.2 Option 2, Derived Units
This option is another continuous display option showing all the quantities that
are calculated from the basic units.
3.2.1.3 Option 3, Voltages
This option is one more continuous display option showing all the voltages
from the 8-bit converters on board the Signal Conditioning Card
microprocessor.
3.2.1.4 Option 4, A/D Converter Menu
This option brings up the A/D converter menu (described below).
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