Specifications

Engineering Standard –NSW
Signalling SMS 02
Cerberus Level Crossing Monitor Equipment
March 2005 Version 1.2 © Australian Rail Track Corporation Page 70 of 118
This document is uncontrolled when printed.
Possible causes for large positive offsets are:
Calibration of the Current Sensors is not as per Section 3.3.4 of this
manual.
More than expected lamps operating.
Lamp voltage is set too high.
The wrong type of lamp is installed.
Faulty main box or wiring from current sensor to the main
box. 5.3.5Lamp problem detected while Crossing operating
Check correct number of lamps are operating, they are adjusted to
the correct voltage and they are the correct type.
Wrong number of lamps detected, intermittently or
consistently.
Check the calibration of the Current Sensors is as per Section 3.3.4
of this manual.
Check the existing lamp offsets and make a note of
them. Perform a lamp learn.
If the lamp learn accepted all of the new offsets then compare them
with the previous offset values. If their is a difference of more 2 in
any offset value then consideration should be given as what has
caused the change. The section Lamp learn rejects results details
those factors that affect the lamp offsets. Lamps offsets for FU
(Flasher Up, flasher contact 12 and 11 made), and FD (Flasher
Down, flasher contact 12 and 13 made) should be within 2 counts.
If the lamp learn did not accept all of the new offsets then proceed
as per the section on Lamp learn rejects results.
Zero lamps detected on either the Country Side or Sydney Side
lamp circuits.
Check flasher inputs and the CSF ZK and the SSF ZK VIOs. See
Section 3.4.5 of this manual.
Check the calibration of the Current Sensors is as per Section 3.3.4
of this manual.
Check Current Sensor output is in the correct range for the number
of lamps as per Section 3.3.3 of this manual.
Check the analogue inputs on the back of the monitor unit reflect
the Current Sensor outputs.
Check the configuration in the monitor is correct.