Electronics &
Communication Technologies -
On Line Set Point Servo System (OLSPSS)
Introduction
This is an automated system to test
trip points of plant safety system by servoing the input
signal around the set point. Facility also exists to
move the input signal to full range & also above
full range & below the minimum range for on line
live signal calibration. The output leads are connected
across 4-20mA terminators of the system under test.
This test & monitoring sequence neither disturbs
the field loop current nor the wiring of the inputs
to system under test.
This method helps the plant maintenance, as wiring
need not be disconnected to calibrate or to test the
safety signals. This method also avoids fear of wrong
connections & loose connections after the plant
maintenance. This method increases the safety &
availability of the plant.
Specifications
Principle
Mode of operation
Operator interface
Measurement mode
Current source
Configuration
Safety interlocks
:
:
:
:
:
:
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Current injection through floating source
Response test / Accuracy test / Calibration mode
Local panel keyboard display
Display station centralized PC
Field current
Floating current injected
0-25mA
Triplicated independent Test Units can be connected
to a centralized display station through serial
isolated link
Single channel single input being tested at a
time
Application
This can be used for OEM application for test &
monitoring unit for plant safety systems for on line
live checking & to make hand held live field calibrators.
For further information please contact
:
Head,
Technology Transfer & Collaboration Division,
Bhabha Atomic Research Centre,
Trombay, Mumbai - 400 085
Tel : 091-022-25505337/25593897
Fax : 091-022-25505151
E-mail : headttcd@barc.gov.in
