Garnet SeeLevel ProSeries II 810-PS2, Руководство пользователя

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Page 6 810-PS2 Manual
T
he 810-PS2 gauge consists of a sender bar, a donut shaped
float, a fiber optic interconnect cable, and a display. The sender
bar is mounted vertically in the tank with the float sliding up and
down around it in accordance with the fluid level. The sender
bar sends the fluid level information via fiber optic cable to the
display, which displays the level in appropriate units and operates
the alarms, SpillStop transmitter, and remote data transmitter.
The float contains magnets which activate reed switches inside the
stainless steel sender bar to indicate the level of the fluid. The
activated switches are detected by the microprocessor at the top
of the bar. The microprocessor operates from a long life lithium
battery giving about 10 years of life. The level information is
relayed through the fiber optic cable to the display, the fiber being
used to maintain electrical isolation between the sender bar and
the display, allowing operation in flammable liquids.
The display converts the level information to volume according
to the calibration programmed into it with the 817 Truck Gauge
Programmer. The calibration can be in inches, centimetres or
volumetric units such as cubic metres or barrels. The entire display
is enclosed in a cast aluminum box with a hinged cover, which is
durable enough to be mounted on the truck or trailer without any
additional protection. The hinged cover keeps the display face
clean and operates an internal switch for LED control and alarm
resetting. The tank level is shown on two displays - an LCD (Liquid
Crystal Display) which takes very little power to operate and gives
excellent daytime visibility, and an LED (Light Emitting Diode)
display which has higher power consumption but gives excellent
night time visibility. To reduce power drain the display only turns
on the LED when the cover is open and when there is not enough
light to see the LCD display. The entire display is powered by four
replaceable alkaline AA cells giving about 1½ to 2 years of life
under normal operation (assuming that the LEDs are on for about
2 hours per day).
The display contains four alarms which are programmed using the
817 Truck Gauge Programmer. They can be set to turn on or off at
any point in the tank. The alarm outputs are transistors which can
handle up to 1 amp of DC current at 24 volts. The transistors are
wired to complete a circuit to ground, so only one wire is needed
to connect to each alarm.
CHAPTER 3 - GAUGE DESCRIPTION