SIST EN 60770-1:2001
(Main)Transmitters for use in industrial-process control systems -- Part 1: Methods for performance evaluation
Transmitters for use in industrial-process control systems -- Part 1: Methods for performance evaluation
Applicable to transmitters which have either a standard analogue electric current output signal or a standard pneumatic output signal in accordance with HD 452.1 or EN 60382. The tests detailed herein may be applied to transmitters which have other output signals, provided that due allowance is made for such differences. Specifies uniform methods of test for the evaluation of the performance of transmitters with pneumatic or electric output signals. Methods of evaluation are intended for use by manufacturers to determine the performance of their products and by users or independent testing establishments to verify manufacturers' performance specifications.
Meßumformer zum Steuern und Regeln in Systemen der industriellen Prozeßtechnik -- Teil 1: Methoden für die Bewertung des Betriebsverhaltens
Transmetteurs utilisés dans les systèmes de conduite des processus industriels -- Partie 1: Méthodes d'évaluation des performances
S'applique aux transmetteurs ayant pour signal de sortie soit un courant électrique normalisé, soit un singal pneumatique normalisé conformément à la HD 452.1 ou à la EN 60382. Les essais détaillés dans cette norme sont applicables à des transmetteurs dotés d'autres singaux de sortie, à condition de tenir compte, de façon appropriée, de ces différences. Spécifie des méthodes uniformes d'essai pour l'évaluation des performances des transmetteurs à signaux de sortie électriques ou pneumatiques. Les méthodes d'évaluation sont prévues pour être utilisées par les constructeurs pour déterminer les performances de leurs produits, et par les utilisateurs ou les laboratoires d'essai indépendants pour vérifier les spécifications de performances fournies par des fabricants.
Transmitters for use in industrial-process control systems - Part 1: Methods for performance evaluation
General Information
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Standards Content (Sample)
SLOVENSKI STANDARD
SIST EN 60770-1:2001
01-junij-2001
Transmitters for use in industrial-process control systems - Part 1: Methods for
performance evaluation
Transmitters for use in industrial-process control systems -- Part 1: Methods for
performance evaluation
Meßumformer zum Steuern und Regeln in Systemen der industriellen Prozeßtechnik --
Teil 1: Methoden für die Bewertung des Betriebsverhaltens
Transmetteurs utilisés dans les systèmes de conduite des processus industriels -- Partie
1: Méthodes d'évaluation des performances
Ta slovenski standard je istoveten z: EN 60770-1:1999
ICS:
25.040.40 Merjenje in krmiljenje Industrial process
industrijskih postopkov measurement and control
SIST EN 60770-1:2001 en
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.
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SIST EN 60770-1:2001
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SIST EN 60770-1:2001
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SIST EN 60770-1:2001
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SIST EN 60770-1:2001
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SIST EN 60770-1:2001
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SIST EN 60770-1:2001
NORME CEI
INTERNATIONALE IEC
60770-1
INTERNATIONAL
Première édition
STANDARD
First edition
1999-02
Transmetteurs utilisés dans les systèmes
de conduite des processus industriels –
Partie 1:
Méthodes d’évaluation des performances
Transmitters for use in industrial-process
control systems –
Part 1:
Methods for performance evaluation
IEC 1999 Droits de reproduction réservés Copyright - all rights reserved
Aucune partie de cette publication ne peut être reproduite ni No part of this publication may be reproduced or utilized in
utilisée sous quelque forme que ce soit et par aucun procédé, any form or by any means, electronic or mechanical,
électronique ou mécanique, y compris la photo-copie et les including photocopying and microfilm, without permission in
microfilms, sans l'accord écrit de l'éditeur. writing from the publisher.
International Electrotechnical Commission 3, rue de Varembé Geneva, Switzerland
Telefax: +41 22 919 0300 e-mail: inmail@iec.ch IEC web site http://www.iec.ch
CODE PRIX
Commission Electrotechnique Internationale
R
PRICE CODE
International Electrotechnical Commission
Pour prix, voir catalogue en vigueur
For price, see current catalogue
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SIST EN 60770-1:2001
60770-1 © IEC:1999 – 3 –
CONTENTS
Page
FOREWORD . 5
Clause
1 Scope and object . 7
2 Normative references. 7
3 Definitions. 11
4 General conditions for tests . 11
5 Analysis and classification of transmitter performance. 13
6 General testing procedures and precautions. 13
7 Test procedures and reporting . 13
8 Other considerations. 25
9 Test report and documentation. 29
Annex A (informative) Analysis and classification of the instrument performance . 31
Figure A.1 – Instrument model. 31
Table 1 – Tests for all transmitters. 15
Table 2 – Additional tests for electrically powered transmitters . 19
Table 3 – Additional tests for pneumatic transmitters . 25
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SIST EN 60770-1:2001
60770-1 © IEC:1999 – 5 –
INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
TRANSMITTERS FOR USE IN INDUSTRIAL-PROCESS
CONTROL SYSTEMS –
Part 1: Methods for performance evaluation
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 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 60770-1 has been prepared by subcommittee 65B: Devices, of
technical committee 65: Industrial-process measurement and control.
It cancels and replaces IEC 60770, published in 1984.
This standard should be read in conjunction with IEC 61298-1, IEC 61298-2, IEC 61298-3 and
IEC 61298-4.
The text of this standard is based on the following documents:
FDIS Report on voting
65B/361/FDIS 65B/376/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.
Annex A is for information only.
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SIST EN 60770-1:2001
60770-1 © IEC:1999 – 7 –
TRANSMITTERS FOR USE IN INDUSTRIAL-PROCESS
CONTROL SYSTEMS –
Part 1: Methods for performance evaluation
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 analysers, flowmeters, etc.)
This standard is intended to specify uniform methods of test for the evaluation of the
performance of transmitters with pneumatic or electric output signals.
The methods of evaluation specified in this standard are intended for use by manufacturers to
determine the performance of their products and by users or independent testing establish-
ments to verify manufacturers' performance specifications.
The test conditions defined in this standard, for example the range of ambient temperatures
and power supply, represent those which commonly arise in use. Consequently, the values
specified herein should be used where no other values are specified by the manufacturer.
The tests specified in this standard are not necessarily sufficient for instruments specifically
designed for unusually arduous or safety related duties. Conversely, a restricted series of test
may be suitable for instruments designed to perform within a more limited range of conditions.
When a full evaluation in accordance with this standard is not required, those tests which are
required shall be performed and the results reported in accordance with those parts of the
standard which are relevant.
2 Normative references
The following normative documents contain provisions which, through reference in this text,
constitute provisions of this part of IEC 60770. At the time of publication, the editions indicated
were valid. All normative documents are subject to revision, and parties to agreements based
on this part of IEC 60770 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 60068-2-1:1990, Environmental testing – Part 2: Tests – Test A: Cold
IEC 60068-2-2:1974, Environmental testing – Part 2: Tests – Test B: Dry heat
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SIST EN 60770-1:2001
60770-1 © IEC:1999 – 9 –
IEC 60068-2-31:1969, Environmental testing – Part 2: Tests – Test Ec: Drop and topple,
primarily for equipment-type specimens
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 60529:1989, Degrees of protection provided by enclosures (IP Code)
IEC 60902:1987, Industrial-process measurement and control – Terms and definitions
IEC 61000-4-2:1995, Electromagnetic compatibility (EMC) – Part 4: Testing and measurement
techniques – Section 2: Electrostatic discharge immunity test. Basic EMC Publication
IEC 61000-4-3:1998, Electromagnetic compatibility (EMC) – Part 4-3: Testing and measure-
ment techniques – Radiated, radio-frequency electromagnetic field immunity test
IEC 61000-4-4:1995, Electromagnetic compatibility (EMC) – Part 4: Testing and measurement
techniques – Section 4: Electrical fast transient/bursts immunity test. Basic EMC Publication
IEC 61000-4-5:1995, Electromagnetic compatibility (EMC) – Part 4: Testing and measurement
techniques – Section 5: Surge immunity test
IEC 61000-4-6:1996, Electromagnetic compatibility (EMC) – Part 4: Testing and measurement
techniques – Section 6: Immunity to conducted disturbances induced by radio-frequency fields
IEC 61000-4-8:1993, Electromagnetic compatibility (EMC) – Part 4: Testing and measurement
techniques – Section 8: Power frequency magnetic field immunity test. Basic EMC Publication
IEC 61000-4-10:1993, Electromagnetic compatibility (EMC) – Part 4: Testing and measurement
techniques – Section 10: Damped oscillatory magnetic field immunity test. Basic EMC
Publication
IEC 61000-4-11:1994, Electromagnetic compatibility (EMC) – Part 4: Testing and measurement
techniques – Section 11: Voltage dips, short interruptions and voltage variations immunity test
IEC 61000-4-12:1995, Electromagnetic compatibility (EMC) – Part 4: Testing and measurement
techniques – Section 12: Oscillatory waves immunity test. Basic EMC Publication
IEC 61000-4-16:1998, Electromagnetic compatibility (EMC) – Part 4-16: Testing and
measurement techniques – Test for immunity to conducted, common mode disturbances in the
frequency range 0 Hz to 150 kHz
IEC 61010-1:1990, Safety requirements for electrical equipment for measurement, control, and
laboratory use – Part 1: General requirements
IEC 61032:1997, Protection of persons and equipment by enclosures – Probes for verification
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SIST EN 60770-1:2001
60770-1 © IEC:1999 – 11 –
IEC 61187:1993, Electrical and electronic measuring equipment – Documentation
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
procedures for evaluating performance – Part 2: Tests 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
IEC 61298-4:1995, Process measurement and control devices – General methods and
procedures for evaluating performance – Part 4: Evaluation report content
3 Definitions
For the purpose of this part of IEC 60770, the definitions given in IEC 60902 together with the
additional definitions below, apply. Many of these definitions are also quoted in IEC 61298.
3.1
zero adjustment
means provided in an instrument to cause a parallel shift in the input-output curve
3.2
maximum measured error
largest positive or negative value of error of the average upscale or downscale value at each
point of measurement [IEC 61298-1:1995, 3.9]
3.3
step response time
time from a step change in the input signal to a system for the change in output of the system
to reach for the first time 90 % of its final steady state value (see IEC 60902, figure 1-2)
[IEC 61298-1:1995, 3.19]
4 General conditions for tests
For the purpose of this standard, the general test conditions (e.g. environmental test
conditions, supply conditions, load conditions, mounting position, externally induced vibrations,
external mechanical constraints, constancy of the operating conditions and settings, input
variable quality, delivery of the transmitter, etc.) specified in IEC 61298-1 apply, together with
the additional information below.
NOTE – It is desirable that the closest communication should be maintained between the manufacturer and the
evaluating body. The manufacturer's specifications for the instrument should be taken into account when the test
programme is being decided, and the manufacturer should be invited to comment on both the test programmes and
the results.
4.1 Supply conditions
For the two-wire transmitters the normal supply voltage is 24 V d.c.
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60770-1 © IEC:1999 – 13 –
Tolerances on supply conditions, as given in IEC 61298-1, are not applicable to transmitters
with self-contained power supplies (e.g. battery-powered). The tolerance for battery-powered
equipment shall be agreed.
4.2 Load conditions
The value of the load to be used shall be agreed. A load of 250 Ω is a commonly used value
for electrical transmitters. Care should be taken to ensure that pneumatic connections are
leak-tight.
4.3 Input variable quality
For transmitters that are to be evaluated with an integral sensor, the conditions and
requirements for maintaining the quantities to be measured (physical/chemical) shall be
properly stated (e.g. for flow transmitters, the fluid through the measuring device shall be that
specified by the manufacturer; the temperature of the fluid shall be maintained within ±2 °C of
the value specified in order to ensure the correct values of density and viscosity).
5 Analysis and classification of transmitter performance
In determining the test programme and test values to be used in the evaluation, the physical
and functional design of transmitter should be taken into account.
Guidance on this process can be found in annex A.
6 General testing procedures and precautions
For the purpose of this standard, the general testing procedures and precautions (e.g.
identification and inspection, preparation for the tests, uncertainty of the measuring system,
traceability, tapping, setting of adjustments, preconditioning, sequence of tests, interruption
and duration of each series of measurements, anomalies and failures during tests, re-start of a
test, input/output variable relationships, error assessment, symbols and units of measurement,
etc.) specified in IEC 61298-1 shall be applied. The instrument shall be calibrated by the
manufacturer and tested without recalibration. Then additional measurements should be made
at the lowest and highest possible span and the remainder of the tests should be carried out at
the mean value.
7 Test procedures and reporting
The tests given in table 1, 2 and 3 are suitable for industrial process transmitters. If a full
evaluation is planned, each applicable test should be conducted. The results should be
reported as a percentage of the output span. Unexpected events, including faults and
malfunctions, shall be reported.
The test procedures and precautions are described in detail in IEC 61298-2 and IEC 61298-3.
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Table 1 – Tests for all transmitters
Designation Notes on test methods and on Reference Additional information
information to be reported
Accuracy-related factors
• Checking of calibration IEC 61298-2
made prior to delivery
• Inaccuracy and Three to five upscale and downscale IEC 61298-2 See notes 1 and 2
full-range traverses, measuring at least
measured error
six points. Compute errors and plot
error curves
• Non-linearity IEC 61298-2
IEC 61298-2
• Non-conformity
IEC 61298-2
• Hysteresis
IEC 61298-2
• Non-repeatability
Vary input to obtain detectable output IEC 61298-2 Use the test procedure
• Dead band
change at 10 %, 50 %, 90 % output. described in note 3
Report the maximum variation of input
in % of input span
Apply peak-to-peak amplitude of 20 % IEC 61298-2 See note 4
• Frequency response
of the input span at frequencies
required in order to vary dynamic gain
from 1 to 0,1.
Plot against frequency
– the gain relative to zero frequency
gain;
– the phase lag between the output
and input
Input steps corresponding to 80 % and IEC 61298-2
• Step response
10 % of output span.
Record the step response time and also
the time for the output to reach and
remain within 1 % of output span of its
steady value (settling time)
• Start-up drift Output monitored for 4 h after power is IEC 61298-2
switched on
Output monitored for 30 days with an IEC 61298-2 See note 5
• Long-term drift
input of 90 % of the span.
IEC 61298-3 See note 6
Effects of influence
quantities
Two or three cycles of the range IEC 61298-3 See note 7
• Ambient temperature
specified
40 °C; 93 % HR IEC 61298-3
• Humidity
• Vibration (sinusoidal) Initial resonance search, endurance IEC 61298-3
conditioning over 60 sweep cycles, and
final resonance search
• Shock "Drop and topple" procedure in IEC 61298-3
accordance with IEC 60068-2-31
±10° inclination in two planes IEC 61298-3
• Mounting position
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Table 1 (continued)
Designation Notes on test methods and on Reference Additional information
information to be reported
Overrange for 1 min. Measure 5 min IEC 61298-3
• Overrange
after return to a value within the normal
range
For differential pressure transmitters,
carry out with the line pressure on both
of the inputs in turn
Steady-state changes at 10 % and IEC 61298-3 Only when effect is
• Temperature of process
fluid 90 % of the input span significant
• Flow of process fluid Change of output at 10 % and 90 % of IEC 61298-3 Only if applicable, e.g.
through the transmitter the input span when for normal operation
process fluid flows through
(other than flow
part of the transmitter
transmitter)
Change of output at 10 % and 90 % of IEC 61298-3
• Static line pressure
the input span at each 25 % increment
effect
of the static pressure
• Flow of purge gas Change at 10 % and 90 % of the output IEC 61298-3
with purge flow to 0 %, 50 % and 100 %
through the transmitter
of the maximum specified
• Accelerated life 100 000 cycles of amplitude equal to IEC 61298-3
half the span. Measure lower range
value, span, and hysteresis at start and
finish of test. Additional measurements
during the test may be required if wear
or ageing is anticipated.
NOTE 1 – For transmitters with analogue output, which include smart options, the adjustment of zero and span
can be obtained either locally or by remote device (e.g. computer, hand terminal). These instruments may be
equipped with facilities for “blind calibration”. In this case no accurate test device is needed for the adjustment of
zero and span.
For this type of transmitter some manufacturers specify also the inaccuracy of the transmitter after the blind
calibration. This type of inaccuracy may differ from the inaccuracy of an instrument calibrated against a standard
test device. It can be considered as a new function to be evaluated.
NOTE 2 – For the purpose of this test and unless otherwise specified for a particular type of transmitter, the
measurement cycles shall be at least three but preferably five and the test points six (0 %, 20 %, 40 %, 60 %,
80 %, 100 % input span) or eleven (0 %, 10 %, 20 %, 30 %, 40 %, 50 %, 60 %, 70 %, 80 %, 90 %, 100 % input
span). For instruments with a non-linear input-output relationship (e.g. square law), the test points should be
chosen so as to obtain output values equally distributed over the output span.
NOTE 3 – Unless the dead band is known to be insignificant, it shall be measured at 10 %, 50 % and 90 % of the
span, proceeding as follows:
a) set the input at the first test point (e.g. 10 %);
b) note the input value;
c) slowly increase the input variable to the transmitter until a detectable output change is observed;
d) note the input value and repeat the operation in the opposite direction as specified in IEC 61298-2.
The increment through which the input signal is varied (difference between d) and b) above) is the dead band at
this point.
Repeat steps c) and d), slowly increasing the input again until a detectable output change is observed and noting
the input value: the increments shall be observed and recorded at least three times, and preferably five times, at
each of three test points close to 10 %, 50 % and 90 % of the span, over a full-range traverse.
This procedure shall be repeated, at each of the three test points (close to 90 %, 50 % and 10 % of span),
decreasing the input variable starting from 90 % of the span.
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Table 1 (concluded)
NOTE 4 – If it is not practicable to generate a sinusoidal signal to be applied to the input of certain transmitters,
(flow, integrally mounted sensor transmitters, etc.) this test should be not performed.
For pneumatic transmitters, unless otherwise specified, a test load consisting of an 8 m long rigid pipe with a
3
4 mm internal diameter, followed by a 20 cm capacity, shall be used. Lower amplitudes may be necessary to
investigate the full bandwidth capability.
NOTE 5 – Where practicable, the data should be measured each day and processed to determine a best fit
straight line and verify if there is a drift in one direction or a random drift.
NOTE 6 – When possible, for smart transmitters with analogue output operated by a transmitter terminal (or by
computer), any effects of influence quantities on the communication (during the execution of function) shall be
verified.
NOTE 7 – For further information on test temperature procedures, see IEC 60068-2-1 and IEC 60068-2-2.
Table 2 – Additional tests for electrically powered transmitters
Designation Notes on test methods and on Reference Additional information
information to be reported
Input resistance of a Resistance presented to d.c. input IEC 61298-2 See note 1
transmitter with electrical signals at the input terminals,
inputs expressed in ohm
Insulation resistance Insulation resistance to earth or to the IEC 61298-2
case of each circuit at 500 V d.c. for
30 s, expressed in ohm
Dielectric strength The r.m.s. test voltage (mains IEC 61298-2
frequency) specified shall not result in
breakdown or flashover
Power consumption Load at maximum supply voltage and IEC 61298-2
minimum frequency specified by
manufacturer (in watts and
voltamperes)
Output ripple Peak-to-peak values and principle IEC 61298-2
frequency components
Output load Vary load resistance from minimum to IEC 61298-3 See note 2
maximum as specified by manufacturer
Source impedance Vary input circuit resistance from See note 3
minimum to maximum values specified
by manufacturer
Supply voltage and Nine sets of measurements for IEC 61298-3 See note 4
frequency variations variations in a.c. voltage and frequency
For transmitters using a d.c. mains
supply, three sets are required
For two-wire transmitters (loop
powered) measure the minimum
voltage that is required to sustain the
20 mA output current
Supply voltage depressions At 75 % of nominal supply voltage for IEC 61298-3 See note 4
5 s. Report the effect on the output
signal and its duration. Voltage dips for
up to 100 ms may also need to be
investigated
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Table 2 (continued)
Designation Notes on test methods and on Reference Additional information
information to be reported
Short-term supply voltage Repeated interruptions at crossover IEC 61298-3 See notes 4 and 5
interruptions point of 1, 5, 10, 25 cycles for a.c.
supply; 5, 20, 100, 200 and 500 ms for
d.c. supply. Report the peak positive
and negative and the time required to
stabilise
Reverse supply voltage IEC 61298-3
protection
Common mode interference For transmitters with terminals isolated IEC 61298-3 See note 6
from earth 250 V r.m.s., a.c. at mains
frequency superimposed on isolated
terminals
Then positive and negative 50 V d.c.
superimposed on isolated terminals
Normal mode interference 1 V or less, at mains frequency and IEC 61298-3
(series mode) 10 % and 90 % of the output span
Earthing Only for transmitters with isolated IEC 61298-3
terminals. Record transients and
changes of output
Electrical fast transients Test voltage specified or 2 kV peak IEC 61298-3 See note 7
(bursts)
Surge voltage immunity Test voltage specified in the product IEC 61298-3 See note 8
standard or by user. Commonly used
maximum values are 2 kV peak
(asymmetric) and 1 kV (peak)
symmetric
Damped oscillatory waves Test voltage specified or 0,5 kV peak See note 9
at 1 MHz
Conducted sine-wave RF- Test voltage specified or 10 V r.m.s. See note 10
disturbances from 0,15 MHz to 80 MHz
Electrostatic discharge Test voltage specified or 6 kV IEC 61298-3 See note 11
(contact), 8 kV (air)
Power frequency magnetic Continuous: 100 A/m (unless higher IEC 61298-3 See note 12
field values are agreed) at 10 % and 90 % of
the output span
Short duration: 400 A/m for 1 s at 50 %
output span
Damped oscillatory Value of field specified or 30 A/m at See note 13
magnetic field 0,1 MHz and 1,0 MHz
Radiated, radio-frequency Value of field specified or 10 V/m from IEC 61298-3 See note 14
electromagnetic field 80 MHz to 1 GHz
Open and short-circuit Interrupt each input connection and IEC 61298-3
of input then short together. Report times for
the output to recover after removal of
open circuit and short-circuit
Open and short-circuit Interrupt each output connection and IEC 61298-3
of output then short together. Report times for
the output to recover after removal of
open circuit and short-circuit
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Table 2 (concluded)
NOTE 1 – The test shall be carried out on the powered transmitter.
NOTE 2 – If no values are specified, the output load for milliampere outputs shall be varied gradually from short
circuit to open circuit and for volt outputs shall be varied from open circuit to short circuit.
NOTE 3 – On transmitters, the input to which is an electrical voltage, the change in output caused by varying the
resistance in the test input circuit from the minimum value specified by the manufacturer to the maximum value
shall be measured. The resistance shall be distributed equally in each line (input terminal).
NOTE 4 – Refer also to IEC 61000-4-11.
NOTE 5 – For smart transmitters with analogue output, the effect of the supply voltage interruptions on the output
may depend on the point in the cycle of the transmitter at which the interruption occurs.
NOTE 6 – Refer also to IEC 61000-4-16.
NOTE 7 – Refer also to IEC 61000-4-4.
NOTE 8 – Refer also to IEC 61000-4-5.
NOTE 9 – This test shall be performed in accordance with the requirements of IEC 61000-4-12 at a test voltage
specified by the manufacturer or at 1 kV peak (common mode) with frequency of 1 MHz; the test shall be repeated
with a frequency of 0,1 MHz.
The input level of the transmitters shall be held at a value which produces 50 % output signal.
The damped oscillatory waves are induced by means of a coupling network defined in IEC 61000-4-12.
During the test, any changes in output due to burst disturbance shall be recorded, as well as any damage caused
to the transmitter.
NOTE 10 – This test shall be performed in accordance with the requirements of IEC 61000-4-6 at a test voltage
level specified by the manufacturer or at 10 V r.m.s. unmodulated with frequency from 0,15 MHz to 80 MHz.
The i
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