Chapter 9 - Troubleshooting Guide - Garnet SeeLevel Special 808-P2 Important Operator Information

CHAPTER 9 - TROUBLESHOOTING GUIDE

T
here are only 4 serviceable components in the gauge: the float, the
sender bar, the interconnecting fiber optic cable, and the display.
If the float is sunk, the display will read the bottom tank reading all the
time. If the float is partially sunk, the reading may rise and then fall as the
tank is filled. If the float has lost its magnets, the reading on the display
will stay the same as the fluid level changes, or the reading may appear to
stick at one value then suddenly jump to a much different value.
If the fiber is damaged or the sender bar is dead, the display will read
"no L" on the display. If the light level is poor due to a damaged or
excessively bent fiber, or if the fiber is not fully inserted, or if the display
is not programmed for the same resolution as the sender, the display will
show "bL:xx", where xx is the number of bits being received. If the fiber
optic cable is disconnected from the display, a flashing red light should be
visible from the end of the fiber.
If the display reads erratically, check for water inside the head or display,
and for a poor end cap seal. If no problem can be seen, the display will
require factory servicing.
To test a sender bar:
1. Make sure the sender is flashing about once a second from the optical
connector. If it is not, the sender is dead and must be replaced.
2. If the sender is flashing, plug a piece of fiber into the sender optical
connector and the other end of the fiber into the OPTICAL INPUT on
the 817-USB Truck Gauge Programmer. The top left display shows
the number of bits the bar is sending and the optical power. If the
optical power is poor (less than 70), then check the fiber, if it is good
and fully inserted then the bar output is defective and the bar must
be replaced. Ensure that the number of bits is correct (1/3" is 8 bits
and 1/6" is 11 bits). If the number of bits is not 8 or 11 then the bar is
defective and must be replaced.
3. Press and hold for one second the BAR TEST button to put the
programmer into the bar test mode. Verify the programmer is in
the same mode as the bar being tested. The inch display will now
show what the bar is putting out. Slowly run a float up the bar while
watching the inch display to verify bar operation. If the bar does not
operate correctly then it must be replaced. To return the programmer
to normal operation press the BACK button.
808-P2 Manual Page 27