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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
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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
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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
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