Specifications

RailCorp Engineering Manual — Signals — Equipment Manual

Cerberus Level Crossing Monitor Field Equipment Manual TMG E1261

Issued August 2012 UNCONTROLLED WHEN PRINTED Version 2.1

States of the form "FU n" and "FD n" are for lamp change events.

States of the form "nn.m amps" are for battery test current, and current events.

States of the form "nn.m degrees" are for temperature events.

7.2.4.1 Voltage

Battery voltage change events occur when the battery voltage has changed by more than

0.5 volts from the last logged value.

General voltage change events occur based on the percentage change specified in the

expressions.

An example is:

Thu 07-04-94 03:51:01.0 A 1 Battery 14.53 volts

7.2.4.2 Lamp

Lamp events occur when the number of lamps operating is detected to have changed.

Typically the time taken to detect a change is 4 seconds.

The names are normally abbreviated. Typically the names and their meaning is as

follows:

SS_LAMPS Sydney Side lamp stand

CS_LAMPS Country Side lamp stand

SS_TIP Tip lights on the Sydney Side boom

CS_TIP Tip lights on the Country Side boom

The state is of form "FU n" or "FD n". FU refers to the set of lamps operating when the

flasher is UP state. FD refers to the set of lamps operating when the flasher is DOWN

state. n is the number of lamps detected as operating.

Note that if the flasher fails whilst the lamps are operating the Level Crossing Monitor will

not log a lamps event for the state to which the flasher no longer changes too. The "FU"

or "FD" event logged may equally apply to the other flasher state even though it is not

logged.

An example of lamp log entries is as follows:

Wed 06-04-94 22:09:11.9 A 2 SS_LAMPS FU 3

Wed 06-04-94 22:09:12.7 A 2 SS_LAMPS FD 3

Wed 06-04-94 22:09:12.7 A 4 CS_LAMPS FU 3

Wed 06-04-94 22:09:13.2 A 4 CS_LAMPS FD 3

Wed 06-04-94 22:10:27.9 A 2 SS_LAMPS FD 0

Wed 06-04-94 22:10:27.9 A 2 SS_LAMPS FU 0

Wed 06-04-94 22:10:27.9 A 4 CS_LAMPS FD 0

Wed 06-04-94 22:10:27.9 A 4 CS_LAMPS FU 0

7.2.4.3 Current

Battery test current change events occur when the battery test current has changed by

more than 2.0 amps from the last logged value.