Siemens GCP5000 Instruction & Installation Manual page 299

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6.2.4.2 Island Checkout Procedures
Remove the Transmitter signal for RX by removing the I-TX wires from the surge panel.
1. Look at the ISL SL: value (on Display calibration menus, Display Details, or 4 char
display, see the previous section for details). If the Signal Level is greater than 20, an
unassociated signal of like frequency is present.
THE CONDITION DETERMINED IN STEP 1 MUST BE RESOLVED. DO
NOT PROCEED TO STEP 2 AND BEYOND UNTIL THE
UNASSOCIATED SIGNAL OF LIKE FREQUENCY IS NO LONGER
PRESENT.
2. Verify that the Island indicator on the Display module shows the island as occupied
(OCC in grey) and that the XR indicator shows XR as down (grey). If the island is not
shunted, replace the PSO module. If the island is occupied and XR is not down, check
that this PSO is included in the AND 1 XR logic.
3. Reconnect the transmitter signal by reconnecting the I-TX wire on the surge panel.
4. Verify that the Island indicator on the Display module shows the island as unoccupied
(CLR in green) and the XR is energized (green).
5. Verify proper operation of the track circuit equipment before placing it in service per
railroad or agency procedures and applicable FRA rules.
6. Verify proper PSO Module operation by observing train moves, per railroad or agency
policy.
7. The system is now ready for operation.
6.3 Recalibration and Reprogramming
6.3.1 Recalibration/Reprogramming Requirements Due to Programming Changes
Table 6-2 indicates the receiver and island recalibration requirements that result from any of the
indicated programming changes. For example, if the transmit power is changed from low to
high, only the receiver must be recalibrated; the island calibration does not change.
FAILURE TO RECALIBRATE OR RESET THE RECEIVER THRESHOLD
CAN RESULT IN IMPROPER SYSTEM OPERATION.
SIG-00-22-02
Version: B.1
GCP5000 (GCE) INSTALLATION, CALIBRATION AND SYSTEM OPERATIONAL CHECK
6-15
WARNING
WARNING
JUNE 2022 (Revised September 2022)