Air Brakes and Train Handling Rules - Alaska Railroad

68 EOT Telemetry Devicesb. Make sure the display on the LCU illuminates and the alarmsounds if the LCU has been armed previously to the EOTbeing tested.NOTE: If the LCU has not been armed to the EOT beingtested, the EOT will display the ARM NOW message onthe LCU.2. During the daylight, make sure the marker light functions by:a. Ensuring that the marker light comes on for 30 secondswhen the EOT TEST button is pressed.orb. Covering the light sensor in the display window for morethan 1 minute and 30 seconds, which will activate themarker light.NOTE: The marker light will operate for about 4 minutes afterthe sensor is uncovered.68.2.4 Automatic Power OffIf the EOT is removed from the coupler and placed in a horizontalposition, it will automatically shut off after 60 seconds. Returningthe EOT to an upright position will restore power after a 2-seconddelay. If the EOT will not be used for an extended period, remove thebattery to prevent battery drain.68.2.5 Replacing the BatteryThe battery may be replaced with the EOTunit installed on the coupler—TRAINLINKII only.68-4 ARRC Air Brakes and Train Handling Manual June 1, 1996