Detector/Encoder Card Tester

Camp Creek Technologies, Inc.

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RC200

RC200 DRPI Detector/Encoder Card Tester and Coil Stack Simulator

The RC200 Card Tester is designed for troubleshooting and testing of Westinghouse Digital Rod Position System (DRPI) 1047F28G01, or equivalent, Detector/Encoder (D/E) cards. Useful for bench or field testing, the tester can exercise the entire DRPI system by simulating rod movements. A modular design is used to reduce the amount of equipment that is taken into containment and to facilitate test setup.

Components

The RC200 consists of three major components:

Power Supply
Coil Stack Simulator (two supplied)
Control Unit

These can be configured for bench testing or field testing.

Power Supply

The Power Supply assembly is used for bench testing of D/E cards. The supply provides +15 VDC and –15 VDC logic voltages for the card and 6 VAC for the coils. A variable transformer is used to provide continuous adjustment of the 6 VAC supply over a range of up to 7 volts. A display shows the AC voltage.

A card edge connector mates with the D/E card rear connector.

6 VAC is supplied to the Coil Stack Simulator via a jumper cable.

Logic gates are provided for card addressing and data readout. Provisions are made for testing the integrity of diodes in the address and data lines on the card. As the Coil Stack Simulator varies the rod position, gray code data is sent to the Control Unit.

Test points allow connection of an oscilloscope or other test equipment to D/E card pin 13 feedback voltage for troubleshooting.

Coil Stack Simulator

Two card stack simulators are provided, one for Group A coils and another for Goup B coils.

The Coil Stack Simulator contains an array of power resistors and solid state relays. 6 VAC is dropped across the resistor array and the 5 ohm terminating resistors on the D/E card. Resistor values are selected so that the voltage seen across the termination resistors is approximately 1.15 VAC for a simulated penetrated coil and 1.6 VAC for a non-penetrated coil.

The simulator mates directly to the D/E card front connector.

6 VAC is supplied to the simulator from the Power Supply (bench testing) or from the DRPI 6 VAC bus (field testing).

Control Unit

A handheld Control Unit is used to sequence the Coil Stack Simulator and to address and read data from the Power Supply.

A 4 line x 20 character backlit LCD display is used for readout.

The Control Unit contains no batteries. It obtains power from the 6 VAC supplied to the Coil Stack Simulator , from the Power Supply, or from an external power adapter.

Two RJ12 connectors are used. For bench testing, one is connected to the Power Supply and the other to the Coil Stack Simulator. For field testing, one or both are connected to Coil Stack Simulators to allow simulation of Group A and/or B coils.

Download Specifications (PDF)