Garnet SeeLevel Special 808-P2 Important Operator Information page 28

4. If a programmer is not available, a quick test can be made of the bar by
jumpering the two top pins on the programming plug in the display.
This converts the display into reading raw inches only, the calibration
is ignored. Run the float up and down on the bar to see if the inches
change in a consistent manner. The bar should read around 80 to 85
inches when the float is near the top. The bottom reading will vary
depending on the length of the bar.
NOTE: If the programmer or display is being used to test a bar
W
outside in bright sunlight, the sunlight may penetrate right through the
black OPTICAL INPUT housing and overwhelm the optical input. If this
happens the programmer will appear to not respond to pressing the BAR
or BAR TEST button. It will be necessary to shade the connector with
your hand to ensure proper operation.
To test a display:
1. The display should show "no L" with no fiber connected. Note that if
the optical connector on the display is exposed to ambient light the
display may read "bd L" or "Sun". If neither of these is the case then
the display is defective and must be replaced. Note that it is possible
for the display to "hang up" and freeze its display if it is exposed to
excessive static shock or strong radio signals. If this is the case it
should automatically reset itself within a few seconds.
2. Press the appropriate mode button to match what the display should
be. Plug a piece of fiber from the OPTICAL OUTPUT of the 817 Truck
Gauge Programmer to the optical connector on the display. If the
display shows "no L" then it is defective and must be replaced (make
sure the end of the fiber going into the display is flashing!). If the
display shows "bd L" then it may be in the wrong mode. Reprogram
the mode according to the instructions in the programming section. If
it does not respond then it is defective and must be replaced.
3. If the display shows some strange reading when the fiber is plugged
in, it may need reprogramming. Copy the existing programming into
an unused memory on the 817-USB (just in case) and then program
the display in inches or a known good program. The display should
show "prog" within a couple of seconds of plugging in the 817 plug,
if not it is defective. After the 817-USB plug is removed the display
should match the reading on the 817-USB calibration display, if it does
not then the display is defective.
Page 28 808-P2 Manual