Temperature detection circuitry and components used in instrumentation

DOE-STD-1162-2003

Discuss the effects of electromagnetic interference and electrostatic discharge on the

performance of components in a typical instrumentation and control circuit.

Discuss the design requirements for I&C system grounds.

Instrumentation and control personnel shall demonstrate a working level knowledge of

temperature detection circuitry and components used in instrumentation and control

systems.

Supporting Knowledge and/or Skills

Discuss the basic functions of temperature detectors.

Describe the construction of a basic Resistance Temperature Detector (RTD).

Explain how Resistance Temperature Detector resistance varies with changes in sensed

temperature.

Explain how an Resistance Temperature Detector provides an output representative of the

measured temperature.

Describe the construction of a basic thermocouple including the materials used.

Explain how a thermocouple provides an output representative of the measured

temperature.

Describe the environmental conditions that can affect the accuracy and reliability of

temperature detection instrumentation.

Given a diagram of a basic temperature instrumentation detection and control system,

describe the function of the following components:

Resistance Temperature Detector (RTD)

Bridge circuit

Direct current-Alternating current converter

Amplifier

Balancing motor/mechanical linkage

Describe the temperature instrument indications for the following faults:

Short circuit

Open circuit

Explain the methods of bridge circuit compensation for changes in ambient temperature.

Instrumentation and control personnel shall demonstrate a working level knowledge of

pressure detection circuitry and components used in instrumentation and control systems.

Supporting Knowledge and/or Skills

Discuss the basic functions of pressure detectors.