1、 IEC 62382 Edition 2.0 2012-11 INTERNATIONAL STANDARD NORME INTERNATIONALE Control systems in the process industry Electrical and instrumentation loop check Systmes de commande pour les procds industriels Contrle de boucle des circuits lectriques et des appareillages IEC62382:2012 colourinsideTHIS P
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16、ERNATIONALE Control systems in the process industry Electrical and instrumentation loop check Systmes de commande pour les procds industriels Contrle de boucle des circuits lectriques et des appareillages INTERNATIONAL ELECTROTECHNICAL COMMISSION COMMISSION ELECTROTECHNIQUE INTERNATIONALE S ICS 25.0
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18、 que vous avez obtenu cette publication via un distributeur agr. colourinside 2 62382 IEC:2012 CONTENTS FOREWORD . 3 INTRODUCTION . 5 1 Scope . 6 2 Normative references . 6 3 Terms, definitions and abbreviated terms . 6 3.1 Terms and definitions 6 3.2 Abbreviated terms . 8 4 Order of loop check and
19、cold commissioning in the project schedule 8 5 Loop check content 9 5.1 Included activities 9 5.2 Activities excluded . 11 6 Loop check procedure 11 6.1 Documentation check 11 6.2 Visual inspection . 11 6.3 Function check 12 6.3.1 General . 12 6.3.2 Sensors . 12 6.3.3 Actuators . 12 6.3.4 Motor loop
20、s . 12 6.3.5 Inter-loops . 13 6.3.6 Interlocks . 13 6.3.7 Quality loops . 13 6.3.8 Safety loops 13 6.4 Checkout of E any IEC National Committee interested in the subject dealt with may participate in this preparatory work. International, governmental and non-governmental organizations liaising with
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28、nsable for the correct application of this publication. 9) Attention is drawn to the possibility that some of the elements of this IEC Publication may be the subject of patent rights. IEC shall not be held responsible for identifying any or all such patent rights. International Standard IEC 62382 ha
29、s been prepared by subcommittee 65E: Devices and integration in enterprise systems, of IEC technical committee 65: Industrial-process measurement, control and automation. This second edition cancels and replaces the first edition published in 2006. This edition constitutes a technical revision. The
30、main changes with respect to the previous edition are listed below: The definition of the documents mentioned in the standards is in accordance with IEC 62708: Documents for Electrical and Instrumentation Projects in the Process Industry. Subclause 6.3 has been revised. The text of this standard is
31、based on the following documents: FDIS Report on voting 65E/271/FDIS 65E/282/RVD 4 62382 IEC:2012 Full information on the voting for the approval of this standard can be found in the report on voting indicated in the above table. This publication has been drafted in accordance with the ISO/IEC Direc
32、tives, Part 2. The committee has decided that the contents of this publication will remain unchanged until the stability date indicated on the IEC web site under “http:/webstore.iec.ch“ in the data related to the specific publication. At this date, the publication will be reconfirmed, withdrawn, rep
33、laced by a revised edition, or amended. IMPORTANT The colour inside logo on the cover page of this publication indicates that it contains colours which are considered to be useful for the correct understanding of its contents. Users should therefore print this document using a colour printer. 62382
34、IEC:2012 5 INTRODUCTION The inspection and verification of the individual measurements and controls in conjunction with the control systems used to monitor these devices (DCS, PLC, etc.) is referred to as loop check. In industry, numerous methods and philosophies are used to check the instrumentatio
35、n and controls after mechanical installation within projects for modified or new facilities. This standard was created to provide a better understanding of what loop check consists of and also to provide a standard methodology for executing a loop check. The annexes of this standard contain forms wh
36、ich may be used in the check procedures. Buyers of this standard may copy these forms for their own purposes only in the required amount. 6 62382 IEC:2012 CONTROL SYSTEMS IN THE PROCESS INDUSTRY ELECTRICAL AND INSTRUMENTATION LOOP CHECK 1 Scope This International Standard describes the steps recomme
37、nded to complete a loop check, which comprises the activities between the completion of the loop construction (including installation and point-to-point checks) and the start-up of cold commissioning. This standard is applicable for the construction of new plants and for expansion/retrofits (i.e. re
38、vamping) of E it is the last systematic check before mechanical completion to ensure that: all E all instrumentation and equipment is delivered according to the design specifications if not already verified during FAT or quality check during equipment receiving; installation has occurred in accordan
39、ce to engineering documents, applicable codes and local regulations; loop functionality is correct. This provides that: in a project, the quality check for E the base for the commissioning phase which consists of the following phases: a) cold commissioning phase during which functional testing of eq
40、uipment and facilities, using test media such as water or inert substances, takes place; b) hot commissioning (chemical start-up) phase during which activities associated with the testing and operation of equipment using the actual process chemicals (initial start-up of process) are performed. The m
41、ain activities in the cold and hot commissioning phases are system verification tuning of loops and instruments and control schemes. 5 Loop check content 5.1 Included activities The loop check includes the following elements of a “single loop“ (sensor and/or actuator). Hardware components: the insta
42、lled instruments or components in the field or in their final destination; IEC 2057/06 10 62382 IEC:2012 the equipment in E hard wired functionality between sensor and actuator loops (if applicable); the input and output (if applicable) cards of process control systems. The basic software components
43、 (including the graphic faceplates, base level alarms and switch points, basic interlocking and basic analogue control) to test the field devices. The loop check uses the basic graphics/faceplates of the control system (see Figure 2). Note that primary inputs and outputs may be connected not only to
44、 DCS but also to ESD, PLC, unit controllers and other subsystems. They all are visualized on DCS. The actual loop check involves the three following phases (see details in Clause 6): a) Documentation checkout Check for the completeness and consistency of loop documents, including any documents from
45、the installation or FAT. b) Visual inspection of loop devices for correct installation and tagging. c) Function check A testing device is used to exercise all the components of the loop (including hardware, wiring and software). It checks that all the components function correctly and that the DCS o
46、r panel readouts are accurate. 1)Check of the operational configuration is completed during cold commissioning or hot commissioning. Figure 2 Loop components During the loop check the following three types of deficiencies can be found: d) Installation failures Installation failures are discrepancies
47、 with the specified hardware or the method of installation (wrong installation, wrong instruments, etc.). The construction contractor should fix these problems. e) Configuration failures IEC 2124/12 62382 IEC:2012 11 Configuration failures are discrepancies with the original software specification.
48、The programming contractor or E etc.) These problems should be corrected by E other factory acceptance tests performed at the contractor or vendors factories; other software checkout activities (FAT,etc.); detailed construction and mechanical inspections performed during the construction phase: cabl
49、e testing during construction (Hipot, Meggering, etc.); point-to-point wiring checks; the testing of the internal workings of package units (i.e. process subunits, machinery, complex analysers, etc.) is excluded; only the I/O testing of this equipment is included in the loop check; activities belonging to the commissioning phase: tuning of loops, instruments and control schemes (for example, calibrating o
