IEC PAS 62382:2004

Electrical and instrumentation loop check

describes the recommended steps to complete a loop check which comprises the activities between the completion of loop construction (including installation and point-to-point checks) and the start-up of the cold commissioning. This document is applicable for the construction of new plants and for expansion/retrofits (i.e. revamping) of E&I installations in existing plants (including PLC, BAS, DCS, Panel-mounted and field instrumentation). It does not include a detailed checkout of power distribution systems except as they relate to the loops being checked (i. e. a motor starter or a power supply to a 4-wire transmitter).

General Information

• Status: Replaced
• Publication Date: 27-Jan-2004
• ICS: 25.040.01 - Industrial automation systems in general
• Technical Committee: TC 65 - Industrial-process measurement, control and automation
• Current Stage: DELPUB - Deleted Publication
• Completion Date: 15-Nov-2006

Relations

• Replaced By: IEC 62382:2006 - Electrical and instrumentation loop check
• Effective Date: 05-Sep-2023

Standards Content (Sample)

PUBLICLY
IEC
AVAILABLE
PAS 62382
SPECIFICATION
First edition
Pre-Standard
2004-01
Electrical and instrumentation
loop check
Reference number
IEC/PAS 62382:2004(E)
Publication numbering
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PUBLICLY
IEC
AVAILABLE
PAS 62382
SPECIFICATION
First edition
Pre-Standard
2004-01
Electrical and instrumentation
loop check
© IEC 2004 ⎯ Copyright - all rights reserved
No part of this publication may be reproduced or utilized in any form or by any means, electronic or
mechanical, including photocopying and microfilm, without permission in writing from the publisher.
International Electrotechnical Commission, 3, rue de Varembé, PO Box 131, CH-1211 Geneva 20, Switzerland
Telephone: [phone] Telefax: [phone] E-mail: [e-mail] Web: www.iec.ch
PRICE CODE
Commission Electrotechnique Internationale Q

International Electrotechnical Commission
МеждународнаяЭлектротехническаяКомиссия
For price, see current catalogue

– 2 – PAS 62382 © IEC:2004 (E)

CONTENTS
FOREWORD .3

INTRODUCTION.4

1 Scope .4

2 Definitions.5

3 Abbreviations.5

4 Order of loop check and cold commissioning in the project schedule .7

5 Loop check scope .7
5.1 Content.7
5.2 Excluded Activities .9
6 Loop check procedure.9
6.1 Documentation check .9
6.2 Visual Inspection .9
6.3 Function check.10
6.4 Checkout of E&I Infrastructure and E&I concepts.10
6.5 Additional tests - Quality and safety relevant loops.11
7 Documents and test sheets.11
7.1 Input documents.11
7.2 Test sheets.11
7.3 Documents generated upon completion of loop check.12
7.4 Loop check results .12
8 Quality assurance.12
9 Safety aspects.12
Annex A (informative) Test report for analogue input loop.13
Annex B (informative) Test report for binary input loop .14
Annex C (informative) Test report for analogue output loop.15
Annex D (informative) Test report for binary output loop.16
Annex E (informative) Test report for motors and variable frequency drives .17

PAS 62382 © IEC:2004 (E) – 3 –

INTERNATIONAL ELECTROTECHNICAL COMMISSION

____________
ELECTRICAL AND INSTRUMENTATION LOOP CHECK

FOREWORD
1) The International Electrotechnical Commission (IEC) is a worldwide organization for standardization comprising

all national electrotechnical committees (IEC National Committees). The object of IEC is to promote
international co-operation on all questions concerning standardization in the electrical and electronic fields. To

this end and in addition to other activities, IEC publishes International Standards, Technical Specifications,

Technical Reports, Publicly Available Specifications (PAS) and Guides (hereafter referred to as “IEC
Publication(s)”). Their preparation is entrusted to technical committees; any IEC National Committee interested

in the subject dealt with may participate in this preparatory work. International, governmental and non-
governmental organizations liaising with the IEC also participate in this preparation. IEC collaborates closely
with the International Organization for Standardization (ISO) in accordance with conditions determined by
agreement between the two organizations.
2) The formal decisions or agreements of IEC on technical matters express, as nearly as possible, an international
consensus of opinion on the relevant subjects since each technical committee has representation from all
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between any IEC Publication and the corresponding national or regional publication shall be clearly indicated in
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equipment declared to be in conformity with an IEC Publication.
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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.
A PAS is a technical specification not fulfilling the requirements for a standard but made available to
the public.
IEC-PAS 62382 has been processed by IEC technical committee 65: Industrial-process measurement
and control.
The text of this PAS is based on the This PAS was approved for publication
following document: by the P-members of the committee
concerned as indicated in the following
document
Draft PAS Report on voting
65/310/PAS 65/323/RVD
Following publication of this PAS, which is a pre-standard publication, the technical committee or
subcommittee concerned will transform it into an International Standard.

– 4 – PAS 62382 © IEC:2004 (E)

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 the loop check. In
industry, numerous methods and philosophies are used to check the instrumentation and controls after

the mechanical installation within projects for modified or new facilities.

This document was created to provide a better understanding of what the loop check consists of and

also to provide a standard methodology for executing the loop check.

The annexes of this document contain forms which may be used in the check procedures. They are

attached to this publication in Excel format. Buyers of this publication may copy these forms for their

own purposes only in the required amount.
The IEC sells read-only PDF files as a general rule. In the present instance, and quite exceptionally, to
enable the user to fill in the forms, a revisable file is included in a pocket affixed to the back cover of
this publication. Please use the zip/unzip function.
This file can also be downloaded from the Web as a PDF file.

PAS 62382 © IEC:2004 (E) – 5 –

ELECTRICAL AND INSTRUMENTATION LOOP CHECK

1 Scope
This document describes the recommended steps to complete a loop check which comprises the

activities between the completion of loop construction (including installation and point-to-point checks)

and the start-up of the cold commissioning. This document is applicable for the construction of new

plants and for expansion/retrofits (i.e. revamping) of E&I installations in existing plants (including PLC,

BAS, DCS, Panel-mounted and field instrumentation). It does not include a detailed checkout of power

distribution systems except as they relate to the loops being checked (i. e. a motor starter or a power
supply to a 4-wire transmitter).
2 Definitions
For the purposes of this document the following definitions apply.
2.1
precommissioning
phase, during which the activities of non-operating adjustments, cold alignment checks, cleaning, and
testing of machinery take place (see annexes)
2.2
mechanical completion
milestone, which is achieved ("mechanically complete’’) when the plant, or any part thereof, has been
erected and tested in accordance with drawings, specifications, instructions, and applicable codes and
regulations to the extent necessary to permit cold commissioning. This includes completion of all
necessary electrical and instrumentation work. This is a milestone marking the end of the
precommissioning activities
2.3
cold commissioning
phase, during which the activities associated with the testing and operation of equipment or facilities
using test media such as water or inert substances prior to introducing any chemical in the system take
place
2.4
Start-up
milestone marking the end of cold commissioning. At this stage the operating range of every
instrument loop is already be adjusted to reflect the actual working condition

2.5
hot commissioning
phase, during which the activities associated with the testing and operation of equipment or facilities
using the actual process chemical prior to making an actual production run, take place
2.6
start of production
milestone marking the end of hot commissioning at which stage the plant is ready for full and
continuous operation
2.7
performance test
– 6 – PAS 62382 © IEC:2004 (E)

milestone at which time the owner’s personnel run the production plant, with the help and supervision

of the contractor, to its design capacity. This test is to demonstrate the contractor’s process

performance as specified in the contract.

2.8
acceptance of plant
milestone in which the formal turnover of the plant from the contractor to the owner is c
...