Chapter 4 - Unique Features - Garnet SeeLevel Special 808-P2 Important Operator Information

CHAPTER 4 - UNIQUE FEATURES

T
he SeeLeveL gauge has been designed for maximum ease of installation
and servicing, and for best operational features. The anchor at the
bottom of the tank provides a shock mount for the float, and holds the
float in place while the bar is removed so no tank entry is required for
sender bar replacement. If the new sender bar is cut to the same length as
the old, no re-calibration is required.
The float is molded from polyethylene for high chemical resistance, good
esthetic appearance, and high durability due to the "give" in the plastic.
The light weight of the polyethylene allows the float size to be minimized
while allowing it to float on the lowest density products.
The sender bar has no moving parts and is completely filled with potting
material to enhance reliability. The use of a digital rather than analog
sensing technique lowers power consumption to permit battery operation,
and ensures high accuracy with no drift or degradation. To accommodate
different tank sizes, the bar is simply cut to length with a hacksaw, and the
cut end sealed with a cap to prevent moisture or product contamination.
This way only one size needs to be stocked, and a perfect fit is ensured.
The sender head is very low in profile to satisfy rollover requirements; the
maximum height is less than 5 inches above the top of the tank so that it
will not protrude above the spillway.
The single fiber optic cable connecting the sender head to the display can
be disconnected at both ends. There is approximately 10 times as much
light as is required for operation available for the fiber, so no special fiber
end preparation is required. The fiber ensures that even with faulty wiring
into the display, no explosion hazard can exist.
The 808-P2 display enclosure used is waterproof and the internal circuitry
is also protected against moisture by an internal panel and a coating on
the circuit board. By being battery operated and not requiring truck power
to operate (other than the LCD backlight), installation is simplified and
reliability enhanced. The small size of the display box also makes it easy
to find an appropriate mounting location. The backlit LCD display ensures
that the gauge display is always visible, regardless of ambient lighting
conditions.
The use of an on-site programmer eliminates downtime waiting for factory
calibration parts, and allows easy reprogramming should the need arise.
The entire display, including decimal point, is completely programmable
to whatever units are desired. In addition to numbers, the letters F, U, L,
and E can be programmed to provide displays such as FULL, E, etc. The
alarm uses a transistor rather than a relay to increase current capability,
eliminate sparking, and eliminate gauge battery power drain.
808-P2 Manual Page 9