Flow detection circuitry and components used in instrumentation

DOE-STD-1162-2003

Closed tank, dry reference leg

Closed tank, wet reference leg

Describe the environmental concerns that can affect the accuracy and reliability of level

detection instrumentation.

Discuss the failure modes of the various types of level indication instruments.

Instrumentation and control personnel shall demonstrate a working level knowledge of flow

detection circuitry and components used in instrumentation and control systems.

Supporting Knowledge and/or Skills

Describe the basic construction and theory of operation of the following types of head

Orifice plates

Venturi tube

Dall flow tube

Pitot tube

Rotameter

Nutating disk

Electromagnetic flow meter

Ultrasonic flow detector

Describe density compensation of a steam flow instrument. Include a discussion of the

reason for density compensation and the parameters used.

Given a basic diagram of a typical flow detection device, discuss the functions of the

following:

Differential pressure (D/P) transmitter

Extractor

Indication

Describe the environmental concerns that can affect the accuracy and reliability of flow

sensing instrumentation.

Discuss the failure modes of the various types of flow indication instruments.

Instrumentation and control personnel shall demonstrate a working level knowledge of

position indication circuitry and components used in instrumentation and control systems.

Supporting Knowledge and/or Skills

Describe the basic construction and theory of operation of synchro position indicators.

Describe the basic construction and theory of operation of the following variable output

position indicators:

Potentiometers

Linear variable differential transformers (LVDT)