Specifications

Engineering Standard –NSW
Signalling SMS 02
Cerberus Level Crossing Monitor Equipment
March 2005 Version 1.2 © Australian Rail Track Corporation Page 71 of 118
This document is uncontrolled when printed.
5.3.6 Lamp problem detected while Crossing not operating
Check the calibration of the Current Sensors is as per Section 3.3.4
of this manual.
Check that the link on current sensor is installed correctly for the
site. Refer to section 3.3.5 of this manual for guidance on setting the
link.
Check the XR input is operating correctly.
Check SS_LIGHT_ZK, and CS_LIGHT_ZK Emergency switch inputs
for correct operation.
If the Current sensor can not be calibrated then replace it.
If the monitor continuously detects lamps then check the voltage on
the appropriate analogue input when the crossing is not operating. It
should be the same as that on the current sensor output and less
than 80 mV. If this is the case, then replace the main box.
If the problem is intermittent and is not solved by the suggestions
given then refer the problem to Standards & Technical Services
Engineer.
5.3.7 Battery test does not work
Check no fault exists.
Check that the monitor passes the system test.
Check battery test timer is okay and set for the correct time
length. Check battery test relays operate in the correct
sequence. Check test cut off input.
Check battery test current sensor is correctly
calibrated. Check battery test current sensor output.
Check batteries.
5.3.8 Monitor indicates a Fault
Check the conditions which could cause a Fault These are detailed
in section 2 for the generic expressions. You should also check the
expressions for the particular crossing.
Examine log to determine exact
cause.
5.3.9 Monitor indicates a SYS Fault
Connect to the monitor with a PC and request System Test.