DIGITAL POCKET RADIATION DOSEMETER

ON LINE SET POINT SERVO SYSTEM (OLSPSS)

On line set point servo system (OLSPSS) provides facility to test trip points of plant safety system by servoing the input signals around the set point strictly one at a time. It provides steering facility to connect a floating current source to triplicated different inputs of one channel of the system under test (SUT). The SUT input current is modified such that the field loop current remains unchanged. The output leads are connected across 4-20mA terminators of the SUT. This automated system aids the plant maintenance, as wiring need not be disconnected to calibrate or to test safety signals. This system avoids fear of wrong connections and loose connections after the plant maintenance, thus increases the safety & availability of the plant.

FEATURES

One channel at a time is tested.
In one channel, only one signal is selected for testing. For more than one selected channels, the test is disabled.
If the channel is tripped, the test is not possible.
Three independent OLSPSS embedded test units (TU) can be connected to display station (DS) through isolated serial link. (an OEM application that can be developed).
Test possible through local panel or through display station.
Response test / Accuracy test / Calibration test with result viewing possible.

SPECIFICATIONS

Principle
Mode of operation
Measurement mode
Current source
Current step resolution

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Current injection through floating source
Response test/ Accuracy test/ Calibration mode
Field current, injected current.
0-25 mA
14 bits

APPLICATION

Used for OEM application for test and monitoring unit for plant safety systems for on line live checking and to make hand held live field calibrators.

INFRASTRUCTURE REQUIRED

Electronic Facility

PTH PCB fabrication
Assembly of Electronic components on PCB

Test Equipments

4½ DIGIT DMM
50 MHZ dual trace oscilloscope
IC tester
EPROM & PAL Programmer
DC Power supplies: 5V (0.5A), ±12V (1A)
Digital analyser

PC Facility
PC with expansion slot for serial ports
Space Required
If the activity is to be started afresh an area around 100 sq. ft. would be sufficient.
Skilled Manpower
Qualified Electronic Engineers (two) to work on embedded systems development & PC software development.

For details contact :

    Head, Technology Transfer & Collaboration Division,
    BHABHA ATOMIC RESEARCH CENTRE,
    TROMBAY, MUMBAI - 400 085
    Fax : 091-022-25505151
    Email : headttcd@barc.gov.in