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					                                                                     750 version 5
                                                                     31-Oct-11
                                                                     1 of 4


                        CORE ELECTRICAL
                 Demonstrate knowledge of electrical
                     test instruments and take
                           measurements



level:                   2

credit:                  2

planned review date:     May 2009

sub-field:               Electrical Engineering

purpose:                 This unit standard is for people needing to make basic
                         electrical measurements of voltage, current, resistance,
                         continuity, and insulation.

                         People credited with this unit standard are able to
                         demonstrate knowledge of electrical test instruments, and
                         take electrical measurements.

entry information:       Open.

accreditation option:    Evaluation of documentation by NZQA and industry.

moderation option:       A centrally established and directed national moderation
                         system has been set up by the ElectroTechnology Industry
                         Training Organisation.

special notes:           1    This unit standard has been developed for learning and
                              assessment off-job.

                         2    References
                              Electricity Regulations 1997;
                              Health and Safety in Employment Act 1992;
                              AS/NZS 3000:2000, Electrical installations (known as
                              the Australian/New Zealand Wiring Rules);
                              AS/NZS 4836:2001, Safe working on low-voltage
                              electrical installations;
                              Electrical Workers Registration Board, Electricity
                              Regulations Compilation 2003. Available from
                              Legislation Direct, PO Box 12 418, Wellington;
                              Electrical Workers Registration Board, Manual for
                              Safety Training in the Electrical Industry, (2000)
                              Wellington;
                              and all subsequent amendments and replacements.




                                                          New Zealand Qualifications Authority 2011
                                                                             750 version 5
                                                                             31-Oct-11
                                                                             2 of 4


                            CORE ELECTRICAL
                     Demonstrate knowledge of electrical
                         test instruments and take
                               measurements



                               3    Definitions
                                    a.c – alternating current;
                                    d.c – direct current.

                               4    The prove-test-prove method refers to proving the
                                    instrument before and after a test to ensure that it
                                    works properly, and is particularly important when
                                    confirming electrical isolation. Some instruments have
                                    fused leads and may give false indication of isolation if
                                    the fuse is open circuit or blows during the test.
                                    Proving is done by applying the instrument to a circuit
                                    that is known to be energised and observing the
                                    measured voltage, testing the circuit to be isolated to
                                    ensure it is in fact isolated, then proving the instrument
                                    again on a circuit that is known to be energised.




Elements and Performance Criteria
element 1

Demonstrate knowledge of electrical test instruments.

performance criteria

1.1         The operation of moving coil and moving iron meters is described in terms of
            component parts and fundamental principles of electromagnetism.

1.2         Analogue instruments are described in terms of their principles of operation and
            their applications.

            Range:       instruments – d.c ammeter, d.c voltmeter, ohmmeter, multimeter;
                         applications – use of series and parallel shunts, battery,
                         potentiometer, diode, selector switch.

1.3         Digital instruments are described in terms of their principles of operation and
            their applications.

            Range:       instruments – multimeter, clip-on ammeter, insulation tester;
                         applications – a.c and d.c voltage and current, resistance,
                         insulation, continuity, diode testing; other specialised functions.

                                                                  New Zealand Qualifications Authority 2011
                                                                              750 version 5
                                                                              31-Oct-11
                                                                              3 of 4


                            CORE ELECTRICAL
                     Demonstrate knowledge of electrical
                         test instruments and take
                               measurements



1.4         Instruments are identified from physical or pictorial displays, and a sketch
            provided showing how each would be connected to perform a measurement.

            Range:        voltmeter, ammeter, ohmmeter, multimeter, clip-on ammeter,
                          insulation tester. Instruments may be analogue or digital.

1.5         Consequences of incorrect use of test instruments are stated.

            Range:        incorrect uses include – polarity reversed, use of wrong
                          instrument, incorrect connection to the circuit, incorrect range or
                          function selection, open circuit fuse in fused lead, broken test lead,
                          open circuit test lead.


element 2

Take electrical measurements.

Range:      a.c and d.c voltage, a.c and d.c current, resistance, continuity, insulation
            resistance.

performance criteria

2.1         Instrument is selected to match the type of measurement in terms of range and
            class of instrument.

2.2         Instrument is visually inspected for safety prior to testing according to industry
            practice.

2.3         The prove-test-prove method is demonstrated according to industry practice.

2.4         Measurements are taken following industry practice and safety procedures.

2.5         The approximate tolerance for each measurement is stated, according to
            industry practice.


Comments on this unit standard

Please contact the ElectroTechnology Industry Training Organisation
reviewcomments@etito.co.nz if you wish to suggest changes to the content of this unit
standard.



                                                                   New Zealand Qualifications Authority 2011
                                                                          750 version 5
                                                                          31-Oct-11
                                                                          4 of 4


                         CORE ELECTRICAL
                  Demonstrate knowledge of electrical
                      test instruments and take
                            measurements



Please Note
Providers must be accredited by the Qualifications Authority or a delegated inter-
institutional body before they can register credits from assessment against unit standards
or deliver courses of study leading to that assessment.

Industry Training Organisations must be accredited by the Qualifications Authority before
they can register credits from assessment against unit standards.

Accredited providers and Industry Training Organisations assessing against unit standards
must engage with the moderation system that applies to those standards.

Accreditation requirements and an outline of the moderation system that applies to this
standard are outlined in the Accreditation and Moderation Action Plan (AMAP). The
AMAP also includes useful information about special requirements for providers wishing to
develop education and training programmes, such as minimum qualifications for tutors and
assessors, and special resource requirements.

This unit standard is covered by AMAP 0003 which can be accessed at
http://www.nzqa.govt.nz/site/framework/search.html.




                                                               New Zealand Qualifications Authority 2011

				
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