IEC 60770-2:2003

Transmitters for use in industrial-process control systems - Part 2: Methods for inspection and routine testing

applies to transmitters, which have either a standard analogue electric current output signal or a standard pneumatic output signal in accordance with IEC 60381-1 or IEC 60382. The tests detailed herein may be applied to transmitters which have other output signals, provided that due allowance is made for such differences.

General Information

• Status: Published
• Publication Date: 29-Jan-2003
• ICS: 17.020 - Metrology and measurement in general
• ICS: 25.040.40 - Industrial process measurement and control
• Technical Committee: SC 65B - Measurement and control devices
• Drafting Committee: WG 6 - TC 65/SC 65B/WG 6
• Current Stage: DELPUB - Deleted Publication
• Completion Date: 10-Nov-2010

Relations

• Revised: IEC 60770-2:2010 - Transmitters for use in industrial-process control systems - Part 2: Methods for inspection and routine testing
• Effective Date: 05-Sep-2023

Standards Content (Sample)

INTERNATIONAL IEC
STANDARD
60770-2
Second edition
2003-01
Transmitters for use in industrial-process
control systems –
Part 2:
Methods for inspection and routine testing
Transmetteurs utilisés dans les systèmes de conduite
des processus industriels –
Partie 2:
Méthodes pour l'inspection et les essais individuels de série

Reference number
Publication numbering
As from 1 January 1997 all IEC publications are issued with a designation in the

60000 series. For example, IEC 34-1 is now referred to as IEC 60034-1.

Consolidated editions
The IEC is now publishing consolidated versions of its publications. For example,

edition numbers 1.0, 1.1 and 1.2 refer, respectively, to the base publication, the

base publication incorporating amendment 1 and the base publication incorporating

amendments 1 and 2.
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INTERNATIONAL IEC
STANDARD
60770-2
Second edition
2003-01
Transmitters for use in industrial-process
control systems –
Part 2:
Methods for inspection and routine testing
Transmetteurs utilisés dans les systèmes de conduite
des processus industriels –
Partie 2:
Méthodes pour l'inspection et les essais individuels de série

 IEC 2003  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
M
International Electrotechnical Commission
Международная Электротехническая Комиссия
For price, see current catalogue

– 2 – 60770-2  IEC:2003(E)
CONTENTS
FOREWORD . 3

INTRODUCTION .4

1 Scope and object . 5

2 Normative references. 5

3 Terms and definitions. 6

4 Sampling for test.7

5 Performance tests. 7
5.1 Test conditions . 7
5.2 Preconditioning . 8
5.3 Adjustments. 8
5.4 Tests under reference conditions . 8
5.5 Effects of influence quantities .10
6 Test report and documentation.12
Figure 1 – Typical measured error plot. 9
Figure 2 – Two examples of responses to a step input .10

60770-2  IEC:2003(E) – 3 –
INTERNATIONAL ELECTROTECHNICAL COMMISSION

___________
TRANSMITTERS FOR USE IN INDUSTRIAL-PROCESS

CONTROL SYSTEMS –
Part 2: Methods for inspection and routine testing

FOREWORD
1) The IEC (International Electrotechnical Commission) is a worldwide organization for standardization comprising
all national electrotechnical committees (IEC National Committees). The object of the 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, the IEC publishes International Standards. 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. The 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 the 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 interested National Committees.
3) The documents produced have the form of recommendations for international use and are published in the form
of standards, technical specifications, technical reports or guides and they are accepted by the National
Committees in that sense.
4) In order to promote international unification, IEC National Committees undertake to apply IEC International
Standards transparently to the maximum extent possible in their national and regional standards. Any
divergence between the IEC Standard and the corresponding national or regional standard shall be clearly
indicated in the latter.
5) The IEC provides no marking procedure to indicate its approval and cannot be rendered responsible for any
equipment declared to be in conformity with one of its standards.
6) Attention is drawn to the possibility that some of the elements of this International Standard may be the subject
of patent rights. The IEC shall not be held responsible for identifying any or all such patent rights.
International Standard IEC 60770-2 has been prepared by subcommittee 65B: Devices, of IEC
technical committee 65: Industrial-process measurement and control.
This second edition cancels and replaces the first edition published in 1989 and constitutes
a technical revision.
The text of this standard is based on the following documents:
FDIS Report on voting
65B/468/FDIS 65B/477/RVD
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 Directives, Part 2.
A bilingual edition may be issued at a later date.
The committee has decided that the contents of this publication will remain unchanged until
2008. At this date, the publication will be
• reconfirmed;
• withdrawn;
• replaced by a revised edition, or
• amended.
– 4 – 60770-2  IEC:2003(E)
INTRODUCTION
The methods of inspection and routine testing specified in this standard are intended for use in

acceptance tests or after repair to verify the fulfilment of the performance specifications as

established by the user. The methods given in this standard are primarily intended for the

testing of conventional analogue transmitters. For setting up test procedures for

microprocessor-based instruments IEC 62098 should be consulted.

60770-2  IEC:2003(E) – 5 –
TRANSMITTERS FOR USE IN INDUSTRIAL-PROCESS

CONTROL SYSTEMS –
Part 2: Methods for inspection and routine testing

1 Scope and object
This part of IEC 60770 is applicable to transmitters, which have either a standard analogue
electric current output signal or a standard pneumatic output signal in accordance with
IEC 60381-1 or IEC 60382. The tests detailed herein may be applied to transmitters which have
other output signals, provided that due allowance is made for such differences.
For certain types of transmitters, where the sensor is an integral part, other specific IEC or ISO
standards may need to be consulted (e.g. for chemical analyzers, flow-meters, etc.)
This standard is intended to provide technical methods for inspection and routine testing
of transmitters, for instance, for acceptance tests or after repair. For a full evaluation,
IEC 60770-1 shall be used.
Quantitative criteria for acceptable performance should be established by agreement between
manufacturer and user.
By agreement the tests need not be carried out by an accredited laboratory.
2 Normative references
At the time of the publication the editions indicated were valid. All normative documents are sub-
ject to revision, and parties to agreements based on these normative documents are encouraged
to investigate the possibility of applying the most recent editions of the normative documents
indicated below. Members of IEC and ISO maintain registers of currently valid International
Standards.
IEC 60050-351:1998, International Electrotechnical Vocabulary – Part 351: Automatic Control
IEC 60381-1:1982, Analogue signals for process control systems – Part 1: Direct current
signals
IEC 60382:1991, Analogue pneumatic signal for process control systems
IEC 60410:1973, Sampling plans and procedures for inspection by attributes
IEC 60770-1:1999, Transmitters for use in industrial-process control systems – Part 1: Methods
for performance evaluation
IEC 61298-1:1995, Process measurement and control devices. – General methods and
procedures for evaluating performance – Part 1: General considerations
IEC 61298-2:1995, Process measurement and control devices – General methods and pro-
cedures for evaluation performance – Part 2: Test under reference conditions
IEC 61298-3:1998, Process measurement and control devices – General methods and
procedures for evaluating performance – Part 3: Tests for the effects of influence quantities

– 6 – 60770-2  IEC:2003(E)
IEC 61298-4:1995, Process measurement and control devices – General methods and proced-

ures for evaluating performance – Part 4: Evaluation report content

IEC 62098:2000, Evaluation methods for microprocessor-based instruments

3 Terms and definitions
The main terms used for measuring the physical quantities are those used in IEC 60050-351
and IEC 61298. For the purpose of this standard the following terms apply:

3.1
acceptance test
a test to prove to the user that the device complies with the performance specifications as they
appear in the contract
3.2
variable
quantity or condition whose value is subject to change and can usually be measured (e.g.
temperature, flow rate, speed, signal, etc.)
3.3
signal
physical variable, one or more parameters of which carry information about one or more
variables, which the signal represents
3.4
range
region of the values between the lower and upper limits of the quantity under consideration
3.5
span
algebraic difference between the upper and lower limit values of a given range
3.6
test procedure
statement of the tests to be carried out, and the conditions for each test, agreed between
the manufacturer, the test laboratory, and the purchaser/user before the evaluation starts
3.7
maximum measured error
largest positive or negative value of error of the upscale or downscale value of each point of
measurement
3.8
hysteresis
the greatest difference between the upscale and downscale output readings at one point
3.9
step response
the time response of a transmitter produced by a stepwise variation of one of the input
variables
3.10
influence quantity
test parameter chosen to represent one aspect of the environment under which a device may
operate.
60770-2  IEC:2003(E) – 7 –
4 Sampling for test
If, by agreement between user and manufacturer, tests are to be performed only on samples, it

is recommended that a sampling method such as that presented in IEC 60410 be selected.

When sampling is used, transmitters to be tested may be chosen by the user.

5 Performance tests
The tests listed in 5.4 and 5.5 shall be performed. Under certain circumstances, the user

may not require every test to be carried out. The sequence of the tests shall be such that

the results of a test are not affected by a previous test, provided proper pre-conditioning has
been performed.
5.1 Test conditions
5.1.1 Ambient conditions
– Temperature from 15 °C to 25 °C
– Relative humidity from 45 % to 75 %
– Atmospheric pressure from 86 kPa to 106 kPa
– Electromagnetic field value to be stated if relevant.
The maximum rate of change of ambient temperature permissible during any test shall be 1 °C
in 10 min, but not more than 3 °C per hour.
5.1.2 Supply conditions
Electrical supply:
– rated voltage ±1 %;
– rated frequency ±1 %;
– harmonic distortion (a.c. supply) less than 5 %;
– ripple (d.c. supply) less than 0,1 %.
Pneumatic supply:
– rated pressure ±3 %;
– supply air temperature ambient temperature ±2 °C;
– supply air humidity dew-point at least 10 °C below device body temperature;
−
– oil
...