Specifications
RailCorp Engineering Manual — Signals — Equipment Manual
Cerberus Level Crossing Monitor Field Equipment Manual TMG E1261
© RailCorp Page 61 of 89
Issued August 2012 UNCONTROLLED WHEN PRINTED Version 2.1
Set the name using the menus.
Set the date and time using the menus and the operations pin number.. You must always
set the date and time even if it is correct as their may be some change in the way in
which the clock is dealt with between software versions.
Clear the log using the menus and the maintenance pin number. The System Fault
should clear.
Using the menus request a System test.
Reset the monitor to ensure the oldest event in the log has the correct date and time.
Display the Input information. Check that the names for each used input bit correspond
with the circuit book. Check that the input states are as expected.
Display the Output information. Check that the names for each used output bit
corresponds with the circuit book and the ".io" configuration data file. Check that the
output states are as expected.
Display the Intermediate terms information. Check that the names correspond with the
".io" configuration data file. Check that the intermediate states are as expected.
Display the Timer information. Check that the names correspond with the ".io"
configuration data file. Check that the timer states and lengths are as expected.
Display the analogue data. Check that the information corresponds to both the ".exp"
configuration data file and the circuit book. Check that the information reflects the current
expected state.
Check and adjust battery charger. A additional load of approximately 1.0A is required to
power the level crossing monitor and the modem. This additional load may result in not
enough trickle charge current for the level crossing battery. Approximately 100 mA to
300 mA of trickle charge current is required (measured with a current gun) into a fully
charged level crossing battery. The battery charger voltage may need to be increased.
Check the current sensor output voltages when their is no current flowing through the
measured circuit. The voltages should be in the range of 50 mV to 110 mV. If they are not
then set them correctly as per section 3.3.
Check that both used and unused inputs and outputs are shown by the monitor to be in
their expected state. Inputs are to be corresponded to the monitor. This is best done by
enabling reporting changes on the appropriate serial channel and watching the changes
occur on the PC screen when the inputs states are changed. Cause each input to change
to both possible states in turn. This must be done by energising or de-energising the
relays etc. For example pull the negative pin for the XR. Then restore it. Note that
additional changes will occur and the tests need to be structured to correspond each
event.
Make sure that the lamps are correctly adjusted and all are operating correctly. Then
place the monitor in lamp learn mode and operate the crossing by pulling the pin for the
XR circuit or XT track relay. Record the learnt lamp offset values. Lamp learn should not
be done using the TEST Switch as this turns off the battery charger and is not the normal
case. The lamp learn takes approximately 40 seconds to complete. If the lamp learn does
not accept all the offsets then proceed as per Section 5 Fault Diagnosis.
Confirm the battery voltage displayed by the monitor is correct within a tolerance of +/-
0.30 volts. The level crossing monitor will display slightly less voltage than the crossing
B12 busbar due to voltage drops on the cable and connectors supplying the 12V for the
monitor. This is corrected using the set battery offset command. Measure the battery