NZQA registered unit standard Title Tune control loops Level 4 2655 version 6 Page 1 of 3 Credits 6 Purpose People credited with this unit standard are able to: demonstrate knowledge of tuning of control loops; tune control loops; and demonstrate knowledge of control loop wiring. Classification Industrial Measurement and Control > Industrial Measurement and Control - Theory Available grade Achieved Explanatory notes 1 Reference ANSI/ISA-5.1-2009 Instrumentation Symbols and Identification; and all subsequent amendments and replacements. 2 Definition Industry requirements – includes all asset owner requirements, manufacturers’ specifications; and enterprise requirements which cover the documented workplace policies, procedures, specifications, business requirements; and quality management requirements relevant to the workplace in which the assessment is carried out. Outcomes and evidence requirements Outcome 1 Demonstrate knowledge of tuning of control loops. Evidence requirements 1.1 Describe primary methods of control loop tuning. Range 1.2 initial controller settings, systematic trial and error, ultimate sensitivity, reaction curve. Identify correct application and limitations of each tuning method in 1.1 above. Range The Skills Organisation SSB Code 100401 fast control loops, slow loops, initial settings. New Zealand Qualifications Authority 2016 NZQA registered unit standard 1.3 2655 version 6 Page 2 of 3 Carry out control loop tuning calculations. Range process reaction curve, systematic trial and error, initial controller settings. Outcome 2 Tune control loops. Evidence requirements 2.1 Implement control loop operation using initial controller settings. Range 2.2 Tune control loops using the closed loop systematic trial and error method. Range 2.3 may include - flow, level, pressure, temperature; evidence of two types is required. Tune fast control loops using the closed loop ultimate sensitivity method and carry out the appropriate calculations. Range 2.4 may include - flow, level, pressure, temperature; evidence of two types is required. may include - flow, level, pressure; evidence of one type is required. Tune slow control loops using the open loop reaction curve method and carry out the appropriate calculations. Range may include - level, temperature; evidence of one type is required. Outcome 3 Demonstrate knowledge of control loop wiring. Evidence requirements 3.1 Interpret control loop wiring diagrams in accordance with industry requirements. Range 3.2 pressure, level, temperature, flow. Wire a control loop in accordance with industry requirements. Range The Skills Organisation SSB Code 100401 pressure, level, temperature, flow; evidence of one of each type is required. New Zealand Qualifications Authority 2016 NZQA registered unit standard Planned review date 2655 version 6 Page 3 of 3 31 December 2017 Status information and last date for assessment for superseded versions Process Version Date Last Date for Assessment Registration 1 31 October 1995 31 December 2013 Revision 2 30 October 1997 31 December 2013 Revision 3 3 April 2001 31 December 2013 Review 4 22 June 2001 31 December 2013 Review 5 19 May 2008 31 December 2019 Review 6 28 November 2013 N/A Consent and Moderation Requirements (CMR) reference 0003 This CMR can be accessed at http://www.nzqa.govt.nz/framework/search/index.do. 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 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. Comments on this unit standard Please contact The Skills Organisation reviewcomments@skills.org.nz if you wish to suggest changes to the content of this unit standard. The Skills Organisation SSB Code 100401 New Zealand Qualifications Authority 2016