NZQA Expiring unit standard
21453 version 4
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Title
Demonstrate knowledge of control systems on energy and chemical
plant
Level
4
Credits
10
Purpose
People credited with this unit standard are able to demonstrate
knowledge of control systems on energy and chemical plant.
Classification
Energy and Chemical Plant > Monitoring of Energy and
Chemical Plant
Available grade
Achieved
Explanatory notes
None.
Outcomes and evidence requirements
Outcome 1
Demonstrate knowledge of control systems on energy and chemical plant.
Evidence requirements
This unit standard is
Range
programmable logic computer, distributed controller, analogue
system.
expiring
1.1
Control systems are described in basic terms.
1.2
Components of control hardware are identified and explained in terms of
purpose and operating concepts.
Range
1.3
Types of control concepts are explained in terms of use and operation.
Range
1.4
includes but is not limited to – transmitters, signal converters,
controllers, actuators, positioners, relays, transducers, limit
switches.
modulating, discrete, closed-loop, open-loop, cascade, split range,
proportional, integral, derivative, logic control, Boolean logic.
Types of control media are explained in terms of use.
Range
mechanical, pneumatic, hydraulic, electrical.
New Zealand Industry Training Organisation
SSB Code 101541
 New Zealand Qualifications Authority 2016
NZQA Expiring unit standard
1.5
Process alarm systems are explained in terms of purpose.
includes but is not limited to – safety, interlock shut down systems,
deviation, permissives, mechanical fault.
Range
1.6
Process alarm activation inputs are described in terms of type.
includes but is not limited to – limit switches, leak detectors,
equipment monitors, instrumentation, interlocks, permissives.
Range
1.7
21453 version 4
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Control systems are described in terms of logic control.
Range
basic understanding of Boolean logic is demonstrated.
Replacement information
This unit standard has been replaced by unit standard
28158.
This unit standard is expiring. Assessment against the standard must take place by
the last date for assessment set out below.
Status information and last date for assessment for superseded versions
Process
Version Date
Last Date for Assessment
Registration
1
27 June 2005
31 December 2014
Rollover and
Revision
2
25 July 2006
31 December 2014
This
unit
standard
is2016
4
24
October 2014
31 December
Consent and Moderation Requirements
(CMR) reference
0079
expiring
This CMR can be accessed at http://www.nzqa.govt.nz/framework/search/index.do.
Review
3
22 May 2009
31 December 2016
Review
Please note
Providers must be granted consent to assess against standards (accredited) by NZQA,
before they can report credits from assessment against unit standards or deliver courses
of study leading to that assessment.
Industry Training Organisations must be granted consent to assess against standards by
NZQA before they can register credits from assessment against unit standards.
Providers and Industry Training Organisations, which have been granted consent and
which are assessing against unit standards must engage with the moderation system that
applies to those standards.
Requirements for consent to assess and an outline of the moderation system that applies
to this standard are outlined in the Consent and Moderation Requirements (CMR). The
New Zealand Industry Training Organisation
SSB Code 101541
 New Zealand Qualifications Authority 2016
NZQA Expiring unit standard
21453 version 4
Page 3 of 3
CMR also includes useful information about special requirements for organisations wishing
to develop education and training programmes, such as minimum qualifications for tutors
and assessors, and special resource requirements.
This unit standard is
expiring
New Zealand Industry Training Organisation
SSB Code 101541
 New Zealand Qualifications Authority 2016