Check current flow in electrical/electronic circuits and components using appropriate test equipment.

Lesson Plan for

DIT 190-191

ELECTRICAL/ELECTRONIC SYSTEMS

Course HS Title: / Electrical/Electronic Systems / Program:
KCTCS Courses included in HS Title: (Lesson is prepared for course highlighted.)
KCTCS Course No. / KCTCS Course Title
DIT 190 / Electrical/Electronic Systems
Introduction/Context / This lesson will instruct the student on how to check current flow in electrical/electronic circuits and components using appropriate test equipment. Knowledge of these techniques and the skills required to correct problems associated with this task are necessary for a student to acquire if they wish to compete for high paying, high skilled jobs in a Diesel Repair Facility. Entry level technicians need to be able to perform this task to 100% accuracy. Incorrectly performing this task can lead to an automobile accident or create customer satisfaction issues.
Prepared By / School / Date:
Grade Level / No. Students / No.IEP's: / Lesson Length:
Task
Check current flow in electrical/electronic circuits and components using appropriate test equipment.
Objective
Given the proper tools and instruction, the student will be able to check current flow in electrical/electronic circuits and components using appropriate test equipment, and pass a written test covering the task with 100% accuracy.

Connections:

Skills Standards:
OH 001
OH 002
OH 003
OD 002
OD 003
OD 005
New Common Core Standards:
RST 11-12 3
A-CED-4
N-Q.1
Common Core Technical Standards:
TD-OPS 2
TD-SYS 2
New Generation Science Standards:
HS-PS2-5.
HS-PS3-3.
HS-PS3-5.

INSTRUCTIONAL MATERIALS/TECHNOLOGY

Teacher Designed Materials and Other Handouts


Textbooks and Workbooks

Author / Title/ISBN No. / Edition / Publisher / Pages
Various / Electrical/Electronic Systems ASE Test Prep / Fifth / Delmar / 12-13


Equipment

Quantity / Item / Source
As Needed / DVOM / Various


Content/Presentation/Demonstration Outline

Tell students that current flow tests are used when a circuit is suspected of having higher than normal current flow, such as a dragging blower motor, or a circuit with a low-resistance short to ground.
Inform students that a technician that has a good knowledge of what normal amperage should be can use this knowledge when troubleshooting electrical circuits. Explain that in testing current flow with an ammeter or DMM, it is important to remember that the test leads are connected in series with the circuit being tested, usually at a point near the power source. The circuit must be interrupted at some point to allow the connection of the test leads.
Instruct them that most DMMs have a 10-20 amp limit when measuring amperage directly through the meter. Any greater current flow will blow its fuse. Tell students that if they suspect that the circuit carries more than that, then a safe way to test for current flow would be to use a current clamp. Explain that this device simply clamps over the wire being tested and determines current flow by measuring the strength of the magnetic field surrounding the wire. While it is extremely handy to use, tell students that it is not as accurate as routing all the current through the DMM, especially in circuits flowing less than 10 amps.
Tell students to remember that low current flow usually is a result of excessive resistance in a circuit or low voltage. Higher than normal current flow can generally be traced to excessive applied voltage or a shorted component or wire.


Applications/Practice

1 / Refer to content


Evaluation and feedback Prior to Testing or Lab Work

1 / Objective 1. / Formative assessment / Instructor will observe students as they practice the procedure to assure correct procedure and safety practices are being followed. A checklist will be utilized to chart student progress on the task. Questioning techniques will be utilized as necessary to demonstrate student comprehension / Adaptations and/or accommodations for special needs students will be added if required.


STUDENT ASSESSMENT:(Assess student progress with performance criteria.)

1 / Objective 1 / Summative assessment / written test questions on stated objective / adaptation and / or accommodations for special needs students will be added if required
IMPACT--Reflection/Analysis of Teaching and Learning: (How did students’ progress in relation to the state objectives? Was the instruction successful? Analyze samples of student work particularly that which is unsatisfactory, for the purpose of planning further instruction.)
REFINEMENT--Lesson Extension and Follow-up: (To be filled in as the lesson is modified during initial planning and/or during the teaching learning process.)