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Detection circuitry and components used in instrumentation |
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|  DOE-STD-1162-2003
b.
Explain how a bellows pressure detector produces an output signal representative of the
measured pressure.
c.
Explain how a bourdon tube pressure detector produces an output signal representative of
the measured pressure.
d.
Explain how a strain gauge pressure transducer produces an output signal representative
of the measured pressure.
e.
Describe the environmental concerns that can affect the accuracy and reliability of
pressure detection instrumentation.
f.
Given a diagram of a basic pressure detection device, describe the function of the
following components:
Sensing element
Transducer
Pressure detection circuitry
Pressure indication
g.
Discuss the failure modes of the various types of pressure indication instruments.
6.
Instrumentation and control personnel shall demonstrate a working level knowledge of level
detection circuitry and components used in instrumentation and control systems.
Supporting Knowledge and/or Skills
a.
Identify the principle of operation of the following types of level instrumentation:
Gauge glass
Ball float
Chain float
Magnetic bond
Conductivity probe
Differential pressure
Sonic probes
Capacitance probes
Bubblers
radar level sensors
b.
Explain the process of density compensation in level detection systems.
c.
Given a basic diagram of a differential pressure detector level instrument, discuss the
functions of the following:
Differential pressure (D/P) transmitter
Amplifier
Indication
d.
Describe the operation and applications of the following types of differential pressure
detector level instruments:
Open tank differential pressure transmitter
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