RKI Instruments Beacon 800 - Manual (Page 34)

31 • Replacing the Fuses Beacon 800 Gas Monitor Operator’s Manual
Replacing the Fuses
The Beacon 800 includes up to three fuses. This section applies to all three fuses. To
replace other components of the Beacon 800, contact RKI Instruments, Inc. for further
information.
1. Turn off or unplug all incoming power to the Beacon 800 at the power source end.
2. Open the housing door of the Beacon 800, then place the power switch in the OFF
position. Loosen the two captive thumbscrews on the right side of the display board,
until the thumbscrews are disengaged from the standoffs.
3. Pull the right side of the display board out toward the housing door. (The standoffs
under the left side of the display board are hinged, which allow the display board to
move in this manner.)
4. Use a flat-blade screwdriver to rotate the applicable fuse holder 1/4 turn counter
clockwise. The fuse holder releases from the socket.
5. Remove the fuse holder from the socket, then remove the fuse from the fuse holder.
CAUTION: Verify that the replacement fuse is the same type and rating as the fuse you
are replacing.
6. Install the appropriate replacement fuse in the fuse holder, then place the fuse holder
in the socket.
7. Push the fuse holder into the socket, then turn the holder 1/4 turn clockwise to secure
it in the socket.
8. Place the display board in its original position, then secure the board to the standoffs
with the two screws you loosened in Step 2.
9. Plug in or turn on all incoming power to the Beacon 800 at the power source end.
10. Place the Beacon 800’s power switch in the ON position, then verify that the PILOT
light is on.
11. Close and secure the housing door.