Garnet SeeLevel Special 808-P2 Important Operator Information page 7

The display has two alarm outputs, one is a horn warning and the other
is a shutdown. These outputs are transistors which complete a circuit to
ground when turned on.
To take advantage of the automatic warning and shutdown capability,
program the alarms as follows:
A1: Not used here, for SpillStop applications only
A2: Program as a shutdown alarm where you want the warning horn to
sound, and the first shutdown to occur.
A3: Program as a shutdown near the bottom of the tank, this is the
bypass reset point
A4: Program as a shutdown at the final high level shutdown point in the
tank.
The system will then operate as follows:
• when the tank level is low (below A3) then the bypass is cleared, the
horn warning output is off (open circuit) and the shutdown output is
on (closed circuit to ground)
• when the level rises to the A2 point, the horn output will turn on
(closed circuit to ground) which will activate the warning horn.
• press the bypass button on the side of the display to turn off the horn
output (turn off the horn).
• if loading is continued and the level rises to the A4 point, then the
shutdown output will turn off. The horn output remains off at this
point. There is no way to bypass this, the fluid level must be lowered
in order to turn the shutdown output back on.
• if the tank level drops below the A2 point, but remains above the
A3 point, the bypass is not reset. In this case if the level rises above
the A2 point again, then the horn output will stay off. This prevents
product sloshing from turning the horn back on.
• when the level drops below the A3 point, then the bypass is cleared. If
the level rises above the A2 point after this, then the horn will sound.
• the bypass button only works once the horn is on, you cannot bypass
before the level rises to the A2 point. If the bypass button is held
down as the level rises to the A2 point, you have to release the button
and press it again to turn off the horn.
808-P2 Manual Page 7