Garnet SEELEVEL II 709-4LP, Manual

Page: 4 / 24

Page 4 7094LP Manual
T
he SeeLeveL consists of a display unit that mounts inside the
RV, and sender panels that stick to the side of the holding tank.
A single two conductor wire is used to connect all the sender
panels to the display.
The Sender: Each sender panel is a flexible self adhesive printed
circuit board which is stuck to the side of the holding tank. The
sender panel can be cut to length to match the height of the tank,
and it auto calibrates itself so that it can read from Empty to Full
regardless of the height of the tank. The sender scans the water
level through the tank wall using patented digital techniques
programmed into the sender microprocessor. When the sender
transmits the water level information to the display, it sends a
digital code that has built in error detection, making it impossible
for the display to read an incorrect level, even if the wiring is
bad. In addition to the level, the sender also transmits diagnostic
information about its operation. This information can be used
to determine if there is buildup of sludge on the inside of the
tank, or to determine if the sender is delaminating from the side
of the tank. If sludge buildup in the tank becomes extreme the
gauge will cease to operate (the tank will always read empty), so
by monitoring the signal level the tank can be cleaned before the
buildup gets excessive. If the tank is more than 12 inches tall, two
senders can be stacked to allow measurement of levels up to 24
inches.
The Display: The display receives the information from the three
sender panels via a single two conductor wire, and displays the
level information in percent of full on a three digit LED display.
When the front panel button for a particular tank is pressed, the
display powers up and displays the level for that tank. If the button
is pressed and released, the display will show the level for about
5 seconds and then shut down automatically. If another button
is pressed before the display shuts down, then the new level will
immediately be shown. If the same button is pressed twice, the
display will hold on that tank and continue to show updated levels
for 5 minutes before shutting off. This allows the user to monitor
the filling or draining of a tank. By pressing two buttons at once,
the diagnostic functions can be accessed; these are described in
detail in the troubleshooting chapter.
If a sender is operating properly and connected to the display with
good wiring, then the display will show the level normally. If the
wiring is disconnected, shorted, or cut, or if the sender panel is
CHAPTER 2 - SYSTEM DESCRIPTION