52 • Replacing the Fuses
9. Press the ENTER button at the Beacon 200 to proceed with the
calibration adjustment.
If the Beacon 200 is able to successfully make the calibration
adjustment, it will display the message Cal Passed for: Channel 2. It
will then return to the first calibration program screen which asks if you
want to continue or escape from the program. Press ESCAPE to return
to normal operation.
If the Beacon 200 is not able to make the calibration adjustment, it will
display the message Not Enough Response! CAL Failed for:
Channel 2, then return to the first calibration program screen which
asks if you want to continue or escape from the program. Press
ENTER to start the calibration process again or ESCAPE to return to
normal operation.
NOTE: Be sure to allow enough time between the application of
calibration gas and returning to normal operation for the gas
reading to return to normal levels to avoid false alarms. The alarm
circuits are active when the Beacon 200 returns to normal
operation.
Replacing the Fuses
The Beacon 200 includes three fuses: one DC and two AC fuses. The
replacement DC fuse must be rated to 6 A, 250 V, and 1/4 x 1 1/4”, fast
acting. The replacement AC fuses must be rated to 3 A, 250 V, 1/4 x 1 1/4”,
fast acting.
To replace other components of the Beacon 200, contact RKI Instruments,
Inc. for further information.
1. Turn off or disconnect mains power to the Beacon 200.
2. Open the housing door of the Beacon 200, then place the power switch
in the OFF position.
3. Locate the vertical fuse holders on either side of the power switch.
The DC fuse which is labelled F1 on the PCB silk-screen is to the left of
the power switch. The AC fuses are labelled F2 and F3 and are to the
right of the power switch.
4. Use a flat-blade screwdriver to rotate the applicable fuse holder 1/4
turn counterclockwise. The fuse holder releases from the socket.
