MT 212 Sensors and Control Elements 2

Lecture Hours: 2
Lab Hours: 2
Credits: 3

Offers a working understanding of smart field devices with an emphasis on more reliable information gathering, decreased maintenance time, ease-of-use, and multi-tasking capabilities. Discusses conventional systems and enhancements when combined with digital control networks, including basic and multivariable smart transmitters and smart valve-positioners. Provides an understanding of electrical grounding from electrical and instrumentation loop relationships. Covers grounding for personnel/equipment protection as well as for electrical noise. Presents signal wiring and noise reduction methods.

Prerequisite: ELT 100 or ELT 133; and MT 101; or consent of instructor. (All prerequisite courses must be completed with a grade of C or better.)
Student Learning Outcomes:

Differentiate between analog and digital instruments.
Formulate how digital signal sampling works in digital instruments.
Identify the strengths and weaknesses of digital instruments.
Identify the effects of using digital instruments in closed loop control.
Configure and verify smart/digital field devices.
Configure and calibrate intelligent control valves.
Test the capabilities of HART™ communication.
Test the operation of a digital multivariable transmitter.

Content Outline

Analog Versus Digital Instruments
- Analog limitations
- Calibration of analog versus digital instruments
- Flexibility of digital instruments
Digital Signal Sampling
- Sampler
- Sampled signal characteristics
- Output of A/D converter
- Slow sampling
Strengths and Weaknesses of Digital Instruments
- Effect on performance
- Multiple measurement
- Programming for field level control
- Future development
Smart Control Values
- Digital positioners
- Diagnostic tools
Intelligent Control Valves
- Digital positioners
- Diagnostic tools
- Adding PID controllers to control valves
Serial Digital Communications
- Parallel to serial converter
- Modem
HART™ Communication
- Features
- Master/slave communications
- Point-to-point
- Capabilities of HART™
Proprietary Bus Systems
- Overview of bus systems
- Need for open bus system
ANSI/ISA50 Fieldbus
- What it is
- How instruments operate
Intelligent Multivariable Transmitters
- How they work
- How they transmit multiple variables
Grounding
- Personnel protection methods
- Equipment protection methods
- Reducing signal noise