Chapter 2 - Enhanced Alarm Features Version - Garnet SeeLevel Special 808-P2 Important Operator Information

CHAPTER 2 - ENHANCED ALARM FEATURES VERSION

T
he 808-P2 has some enhancements over the 808PA series. It uses new
technology in the display to provide a number of new features:
1. The calibration memory has been changed to a flash memory device
which is much more secure and does not require power to maintain
the memory contents. This should result in a much more reliable
operation, with less chance of a lost or corrupted calibration.
2. The display can be programmed with a magnet for 8 or 11 bit
operation, to work with bars in either 1/3, 1/4, or 1/6 inch mode. If a
sender bar ends up in the wrong mode, then the display will show bad
light and the number of bits received. The previous displays would
not accept bars in 11 bit (1/6 inch) mode. The mode is stored in the
display in the same secure memory as the calibration.
3. The display has improved diagnostics:
• If the wrong number of bits are received, then the display shows
"bL:xx" where xx is the number of bits actually received.
• By connecting together two end pins on the right hand side of the
programming plug (looking at the back of the display), the display
will show a basic inch calibration, which aids in troubleshooting to
determine if the sender bar or display calibration is at fault.
• If there is a fault during programming or if the memory is not
functioning correctly, the display shows "Err".
• If the memory does not have a valid value for the number of
received bits (either 8 or 11) then the display shows "Prob".
• If the display has no fiber connected and is exposed to strong light
the display will show "Sun" indicating that sunlight is affecting the
display. If a flickering light gets into the display opto then the
display may show either "Sun" or "bL:xx" depending on the exact
nature of the light getting in.
4. The optical receiver has been improved so it cannot be overloaded
with too much light from the sender bar.
5. The display backlight has been changed for improved brightness and
evenness of illumination. The color has been changed to yellow to
make it easier to see.
6. The fiber optic connector is field replaceable, so if it is broken or fails,
the display can be quickly returned to service.
7. The entire display has been miniaturized to fit into the lid of the
enclosure. This greatly eases installation and servicing, since the
gauge can be removed without having to unbolt the base of the
enclosure. To remove the display, simply pop the lid off, undo the
fiber, and disconnect the wires.
Page 4 808-P2 Manual