SAULT COLLEGE OF APPLIED ARTS & TECHNOLOGY

COURSE OUTLINE

Course Title:AUTO CONTROL SYSTEMS

Code No.:ELN 208-3

Program:INSTRUMENTATION TECHNICIAN

Semester:3

Date: SEPTEMBER, 1985

Author:R. PALO

New: Revision:x

APPROVED:CHAIRPERSON DATE

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ELN1208-3

PHILOSpPHY/GOALS:

To provide a basic understanding qf pneumatic measurement and controlapplications.

GRADING:

TEXTBOOK(S):

"Process Instrumentation and Contrpl Fundamentals""Pneumatic Measurement and ControJ Fundamentals" by General PhysicsCorp.

1) Written tests conducted at regular intervals

2) Grading A -- 76 - 100%B -- 66 - 75%C -- 50 - 65%R -- less than 50%

3) 70% for tests30% for lab

4) Lecture and lab attendence manatory

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Course Outline

Block I - Basic Mechanical Devices

Topic

IntroductionLeversPulleysThe wheel and axleInclinedplaneThe screwGears

Chap

1

Hrs

1

1

1

-r

Block 2 - Pneumatic Instrument ComDonents and Subassemblies

Topic

IntroductionLeversBeamsSpringsSpring scaleThe bourdon tubeDiaphragmsBellowsThe diaphragm capsuleBellows - spring subassemblyDiaphragm - spring subassemblyRolling diaphragm - spring subassembly

Block 3 - The FlaDDer/Nozzle, The Pilot Valve, The Pneumatic Rela

Topic

IntroductionRestrictionsThe flapper/nozzle detectorPilot motion detectorThe pneumatic relayDirect acting bleed type relayReverse acting bleed type relayDirect acting non bleed type relay

Chap

3

Hrs

1

1

1

1

4

Chap Hrs

21

1

1

1

1

1-

6

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Block 4 - Force Balance Instruments

Topic Chap

Introduction 4The process variable transmitter, feed fwd. typeThe displacement transmitter, feedfwd typeThe variable indicator, feedfwd typeThe proportional controller, feedfwd typeThe actuator, feedfwd typeFeedback instrumentsMoment-balance feedback type instrumentsProcess variable transmitter, moment-balance feedback typeThe motion tran~mitter, moment-balance feedback typeThe variable indicator, moment-balance typeThe proportional controller, moment-balance typeThe actuatorjpositioner, moment-balance feedback typeTrue force-balance feedback typeThe process variable transmitter, true force balance typeThe motion transmitter, true force balance typeThe variable indicator, true force balance typeThe proportional controller, true force balance typeThe actuatorjpositioner, true force balance type

Block 5 - Motion-Balance Instruments

Topic Chap

Introduction 5Angle motion-balance feedback typeThe process variable transmitter, angle motion balance typeThe motion transmitter, angle motion balance typeThe recorder, angle motion balance typeThe proportional controller, angle motion balance typeThe actuatorjpositioner, angle motion balance typeLinear motion balance feedback typeThe process variable transmitter linear motion balance typeThe motion transmitter, linear motion balance typeThe recorder, linear motion balance typeThe proportional controller, linear motion balance typeThe actuatorjpositioner, linear motion balance type

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Hrs

I

1

1

1

1

1

1

1

11

10

Hrs

1

1

1

1

1

1

6

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Block 6 - Pneumatic Measurement Instruments

Topic Chap

Introduction 6Temperature measurement instrumentsFoxboro model 12A temp. transmitterMoore series 33 temp. transmitterPressure measurement instrumentsFoxboro model 45 pressure transmitterTaylor 210 pressure transmitterFlow measurementGC-11 differential press. transmitterFoxboro model 557 square root extractorLow signal cutoffLevel measurement instrumentsFoxboro model 13 differential pressure transmitterFisher controls level-tro1 transmitterPneumatic indication instrumentsMoore series 2000 recorder

Block 7 - Pneumatic Measurina Instrument Arranaements

Topic

IntroductionInstrument air systemsAir supply regulatorsSupply pressures and signal rangesSignal transmission pipingTransmission lagProcess connectionsInstruments mountingBasic measurement loopsTemperature measuring channelPressure measuring channelFlow measuring channelLevel measuring channel

Chap

7

Block 8 - Pneumatic Control Instruments

Topic Chap

8IntroductionTwo-position controller

Hrs

1

1

1

1

1

1

1

1

8

Hrs~

1

1

1

1

1

1

6

Hrs

1

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Integral controllerProportional-pIus-integral controllerReset wind-upProportional-pIus-derivative controllerProportional-pIus-integra I-pIus-derivative controllerFisher controls level-trol two-position controllerMasoneilan 3706 proportional controllerMoore model 55 nullmatic proportional-pIus-reset controllerFoxboro model 40 proportional-pIus-derivative controllerTaylor proportional-plus-reset-plus-rate controller

I

II

II

I

7

Block 9 - ControJ Valves and Actuators

Topic

IntroductionGlobe valvesGate valvesChecil valvesButterfly valvesBall valvesControl valve actuatorsDiaphragm actuatorPiston actuatorsElectro-hydraulic actuatorsManual actuatorsValve actuator selectionControl valve bodies and trimSingle seatedDouble seatedCage guidedThree-wayBoot-styleButterflyV-notch ballEccentric-diskValve characteristicsLinearQuick-openingEqual percentageInherent and installed characteristicsControl valve-selectionControl valve sizing

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Control valve noiseValve positionersFisher 3580 positionerBooster relaysHandwheelsSnubbersPneumatic lock-up valves

Block 10 - Pneumatic Control Arrangements

Topic

IntroductionBasic control loopTemperature control loopPressure control loopFlow control loopLevel control loopCascade controlRatio control loopFeedforward control loopComputer relaysFoxboro model 136 summing junction

Chap

10

1

1

1

17

Hrs

1

1

1

1

1

5

TOTAL HRS = 72

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Specific Objectives

Block I

The student shall be able to recall, explain or apply:

1) The force-motion relationship for; levers, pulleys, wheels andaxles, inclined planes, screws and gears.

2) Mechanical advantage for above.3) Types of gears.

Block 2

The student shall be able to recall, explain or apply:

1) Spring force-displacement relationship.2) Types of beams and levers and applications.3) Types of diaphragms and bellows and applications.4) Types of link-lever mechanisms.5) Angularity error and how it is eliminated.

Block 3

The student shall be able to recall, explain or apply:

1) The uses of a restriction.2) Flapper nozzle detector for motion sensing.3) The use of a pilot motion detector.4) Pneumatic relay construction and types.

Block 4

The student shall be able to recall, explain or apply:

1) Characteristics of feedforward and feedback instruments.2) The 5 possible functions performed by feed forward instruments.

Block 5

The student shall be able to recall, explain or apply:

1) Characteristics of angle and linear motion balance instruments.

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Block 6

The student shall be able to recall, explain or apply:

1) How commercially available instruments use moment balancefeedback, true force balance feedback, angle motion balancefeedback and linear motion balance feedback to measuretemperature, pressure, flow and level.

Block 7

The student shall be able to recall, explain or apply:

1) How clean dry plant air is made.2) How it is distributed.3) Standard instrument signal range.5) Transmission lag.6) Capacitance.7) Correct installation of instrument sense lines.8) Advantage and disadvantage of pedestal and line mounted

instruments.

Block 8

The student shall be able to recall, explain or apply:

I) The characteristics and application for the following controlactions:

a) On-off or two positionb) Integralc) Proportional-pIus-integrald) Proportional-plus derivativee) PrQportional-plus-integral-plus-derivative

2) How these control actions are implimented in pneumaticcontrollers.

Block 9

The student shall be able to recall, explain or apply:

1) Characteristics and appl ication of various types of controlvalves; globe, gate, check, butterfly and ball.

2) Types and characteristics of valve actuators.3) The 3 common valve flow characteristics.

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4) How to size a control valve using the valve coefficient.S) Control valve noise.6) Function and characteristics of common pneumatic valve

positioners.7) Purpose of booster relays, snubbers and pneumatic lock-up valves.

Block 10

The student shall be able to recall, explain or apply:

1) Construction of a pneumatic to electronic signal converter.2) Construction of an electronic to pneumatic signal converter.

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