Figure 6-1 Calibration Selection - Siemens GCP5000 Instruction & Installation Manual

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Calibration is used to set signal threshold values (SIG LVL=100) for Receivers and Island
Receivers. In Broken Rail Detection applications, the receiver threshold may be adjusted to a
value higher than 100 as detailed in the procedure below.
The following procedure assumes the user is using the local Display keypad to calibrate the
unit.
With the PSO Module properly installed and programmed per railroad instructions, Calibrate the
receiver (RX1 or RX2) as follows:
When the track ballast is good, connect a track test shunt (hardwire, 0.06-ohms, 0.2-ohms, or
as required) across the track at the receiver track connections of the approach. When the
ballast is poor, connect the shunt across the track at a point 30 ft. (9.14 m) beyond the receiver
track connections of the approach. Ensure that the shunt has solid connections to each rail.
The shunt position can be moved according to application and desired drop-
out point for the circuit. For example, with crossovers, shunt the farthest
crossover point from the receiver.
1. On the keypad, press the number corresponding to the PSO to be calibrated (1 to 5).
Then press the '2' key for calibration.
SIG-00-22-02
Version: B.1
GCP5000 (GCE) INSTALLATION, CALIBRATION AND SYSTEM OPERATIONAL CHECK

Figure 6-1 Calibration Selection

6-3
NOTE
JUNE 2022 (Revised September 2022)