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GB/T 18271.3-2017: Process measurement and control devices -- General methods and procedures for evaluating performance -- Part 3: Tests for the effects of influence quantities
---This is an excerpt. Full copy of true-PDF in English version (including equations, symbols, images, flow-chart, tables, and figures etc.), auto-downloaded/delivered in 9 seconds, can be purchased online: https://www.ChineseStandard.net/PDF.aspx/GBT18271.3-2017
NATIONAL STANDARD OF THE
PEOPLE’S REPUBLIC OF CHINA
ICS 25.040.40
N 10
GB/T 18271.3-2017 / IEC 61298-3.2008
Replacing GB/T 18271.3-2000
Process measurement and control devices - General
methods and procedures for evaluating performance -
Part 3.Tests for the effects of influence quantities
(IEC 61298-3.2008, IDT)
Issued on. JULY 12, 2017
Implemented on. FEBRUARY 01, 2018
Issued by. General Administration of Quality Supervision, Inspection and
Quarantine of the PRC;
Standardization Administration of the PRC.
Table of Contents
Foreword... 4
1 Scope... 8
2 Normative references... 8
3 Terms and definitions... 10
4 General considerations... 12
4.1 Criteria... 12
4.2 General procedures... 12
4.3 General EMC requirements... 13
5 Ambient temperature effects... 14
5.1 Criteria... 14
5.2 Test procedure... 14
6 Ambient relative humidity effects... 15
7 Vibration... 16
7.1 General considerations... 16
7.2 Initial resonance search... 18
7.3 Endurance conditioning by sweeping... 18
7.4 Final resonance search... 18
7.5 Final measurements... 18
8 Shock, drop and topple... 19
9 Mounting position... 19
10 Over-range... 20
11 Output load effects... 20
11.1 Electrical output... 20
11.2 Pneumatic output... 21
12 Power supply... 21
12.1 Supply voltage and frequency variations... 21
12.2 Transient supply voltage effects... 22
12.3 Supply voltage depression... 22
12.4 Short-term supply voltage interruptions... 23
12.5 Fast transient/burst immunity requirements... 24
12.6 Surge immunity requirements... 25
12.7 Reverse supply voltage protection (d.c. devices)... 25
12.8 Supply pressure variations... 25
12.9 Supply pressure interruptions... 26
12.10 Conducted radio frequency requirements... 26
13 Electrical interference... 27
13.1 Common mode interference... 27
13.2 Series mode interference... 27
13.3 Earthing... 27
14 Harmonic distortion effects... 27
15 Magnetic field effects... 28
16 Electromagnetic field immunity test... 30
17 Electrostatic discharge... 31
18 Effect of open-circuited and short-circuited input... 32
19 Effect of open-circuited and short-circuited output... 33
20 Effects of process medium conditions... 33
20.1 Temperature of process fluid... 33
20.2 Flow of process fluid through the device... 33
20.3 Static line pressure effect... 34
21 Atmospheric pressure effects... 35
22 Flow of purge gas through the device... 35
23 Accelerated operational life test... 35
24 Operational long-term drift test (optional)... 36
Bibliography... 38
Foreword
GB/T 18271 "Process measurement and control devices - General methods
and procedures for evaluating performance" is currently planned to be issued
as follows.
- Part 1.General considerations;
- Part 2.Tests under reference conditions;
- Part 3.Tests for the effects of influence quantities;
- Part 4.Evaluation report content.
This Part is Part 3 of GB/T 18271.
This Part is drafted in accordance with the rules given in GB/T 1.1-2009.
This Part replaces GB/T 18271.3-2000 "Process measurement and control
devices - General methods and procedures for evaluating performance - Part
3.Tests for the effects of influence quantities". Compared with GB/T 18271.3-
2000, the main technical changes of this Part are as follows.
- UPDATE normative references (see Clause 2; Clause 2 of the 2000 edition);
- Delete the term "device under test" and definition (see 3.1 of the 2000
edition);
- ADD the term "type test" and definition (see 3.8);
- ADD the requirement that “A test is only to be performed if it is applicable
to the Device Under Test (DUT). If the specification of the DUT states limits
for the influence considered, these limits shall be noted and respected” (see
4.1);
- ADD general requirements for electromagnetic compatibility test (see 4.3);
- Modify the temperature range, temperature class, and typical service
application in Table 1 "Ambient temperature test ranges" and add a note
(see Table 1; Table 1 of the 2000 edition);
- Modify the typical application and the parameter of vibration levels in Table
2 "Vibration test levels" (see Table 2; Table 2 of the 2000 edition);
- Modify the test voltage and frequency values in "Supply voltage and
frequency variations" (see 12.1; 12.1 of the 2000 edition);
- In "Short-term supply voltage interruptions", delete the requirements that
"The a.c. power supply unit shall be interrupted for 1, 5, 10, and 25 cycle
durations at the crossover point" and "In addition, random interruptions can
also be used for at least 10 times each duration"; CHANGE to the provision
that the tests shall be according to the requirements of 4.3; and, add the
test parameters of power supply commutations-interruptions (see 4.3; 12.4
of the 2000 edition);
- Modify "Fast transient/burst immunity" test requirements; ADD the provision
that the tests shall be according to the requirements of 4.3; CHANGE
"severity level specified by the manufacturer" to "severity level according to
Table 2 of GB/T 18268.1-2010"; and, add Table 5 "Burst characteristics"
(see 12.5; 12.5 of the 2000 edition);
- Modify "Surge immunity" test requirements; ADD the provision that the tests
shall be according to the requirements of 4.3; CHANGE "severity level
specified by the manufacturer" to "severity level according to Table 2 of
GB/T 18268.1-2010"; amend "Input level shall be maintained at a value that
produces 50 % of the output signal" to "The device input shall be held
constant at 50 %"; and, add Table 6 "Surge characteristics" (see 12.6; 12.6
of the 2000 edition);
- ADD the provision that the tests shall be according to the requirements of
4.3 to "Supply pressure interruptions" (see 12.9);
- ADD the test method of "Conducted radio frequency requirements" (see
12.10);
- Delete the provisions regarding "Common mode interference" and "Series
mode interference" (see 13.1 and 13.2 of the 2000 edition);
- Modify the harmonic distortion test level in "Harmonic distortion effects"
from 2 % and 10 % TO 2 %, 5 %, 10 %, and 20 % (see Clause 14; Clause
14 of the 2000 edition);
- ADD the provision that "Magnetic field effects" test shall meet the
requirements of 4.3; CHANGE the test magnetic field strength from a
uniform 400 A/m (r.m.s) to "according to the relevant standards for the
environment in which it is located" (see Clause 15);
- Modify the title of Clause 16 from "Radiated electromagnetic interference"
to "Electromagnetic field immunity test"; ADD a provision that the test field
strength for the enclosure device is 10 V/m (see Clause 16; Clause 16 of
the 2000 edition);
- ADD the provision that the tests shall be according to the requirements of
4.3 to "Electrostatic discharge"; MAKE clear that a severity level, specified
in GB/T 18268.1-2010, is defined for the enclosure device equivalent to 4
kV / 8 kV contact/air (see Clause 17);
- CHANGE "Operational long-term drift test" to optional (see Clause 24);
- ADD bibliography.
This Part, using translation method, is identical to IEC 61298-3.2008 "Process
measurement and control devices - General methods and procedures for
evaluating performance - Part 3.Tests for the effects of influence quantities".
China’s documents which have a consistent correspondence with the
international documents normatively referenced in this Part are as follows.
- GB/T 2900.79-2008 Electrotechnical terminology - Electrical and electronic
measurements and measuring instruments - Part 3.Types of electrical
measuring instruments [IEC 60050(300-313).2001, IDT]
- GB/T 2900.89-2012 Electrotechnical terminology - Electrical and electronic
measurements and measuring instruments - Part 2.General terms relating
to electrical measurements [IEC 60050(300-312).2001, IDT]
- GB/T 2900.90-2012 Electrotechnical terminology - Electrical and electronic
measurements and measuring instruments - Part 4.Specific terms
according to the type of instruments [IEC 60050(300-314).2001, IDT]
- GB/T 2423.1-2008 Environmental testing for electric and electronic
products - Part 2.Test methods - Tests A. Cold (IEC 60068-2-1.2007, IDT)
- GB/T 2423.2-2008 Environmental testing for electric and electronic
products - Part 2.Test methods - Tests B. Dry heat (IEC 60068-2-2.2007,
IDT)
- GB/T 2423.3-2006 Environmental testing for electric and electronic
products - Part 2.Testing method - Test Cab. Damp heat, steady state (IEC
60068-2-78.2001, IDT)
- GB/T 2423.7-1995 Environmental testing for electric and electronic
products - Part 2.Test methods - Test Ec and guidance. Drop and topple
(Primarily for equipment-type specimens) (idt IEC 60068-2-31.1982)
- GB/T 2423.10-2008 Environmental testing for electric and electronic
products - Part 2.Tests methods - Test Fc. Vibration (sinusoidal) (IEC
60068-2-6.1995, IDT)
- GB/T 18268 (all parts) Electrical equipment for measurement, control and
laboratory use - EMC requirements [IEC 61326 (all parts)]
The following editorial changes have been made in this Part.
- CORRECT IEC 60068-2-30 incorrectly quoted in Clause 6 to IEC 60068-2-
78 and add it to Clause 2.
This Part was proposed by China Machinery Industry Federation.
This Part shall be under the jurisdiction of National TC 124 on Industrial Process
Measurement, Control and Automation of SAC (SAC/TC 124).
Drafting organizations of this Part. Shanghai Institute of Process Automation &
Instrumentation, Chongqing Institute of Industrial Automation and
Instrumentation, Southwest University, Shanghai Automation Instrumentation
Co., Ltd.
Main drafters of this Part. Wang Jianing, Liu Qin, Zhou Xuelian, Ni Min.
The previous editions of the standard replaced by this Part were released as
follows.
- GB/T 18271.3-2000.
Process measurement and control devices - General
methods and procedures for evaluating performance -
Part 3.Tests for the effects of influence quantities
1 Scope
GB/T 18271 specifies general methods and procedures for conducting tests
and reporting on the functional and performance characteristics of process
measurement and control devices. The tests are applicable to any such devices
characterized by their own specific input and output variables, and by the
specific relationship (transfer function) between the inputs and outputs, and
include analogue and digital devices. For devices that require special tests,
GB/T 18271 should be used, together with any product-specific standard
specifying special tests.
2 Normative references
The following documents are indispensable for the application of this document.
For the dated references, only the editions with the dates indicated are
applicable to this document. For the undated references, the latest edition
(including all the amendments) are applicable to this document.
GB/T 2900.56-2008 Electrotechnical terminology - Control technology (IEC
60050-351.2006, IDT)
3 Terms and definitions
The terms and definitions defined in GB/T 2900.56-2008, GB/T 2900.77-2008,
and IEC 60050 (300) and the following ones apply to this document.
Algebraic difference between the values of the upper and lower limits of the
measuring range.
4 General considerations
However, consideration should be given to any combination of two or more
influence quantities which may aggravate the operating conditions (e.g. for an
electrical device, temperature and supply voltage).
5 Ambient temperature effects
Any effects on a digital display indicator shall also be reported, including loss
of contrast, brightness, distortion or missing bits.
6 Ambient relative humidity effects
The effects of ambient relative humidity shall be determined by placing the DUT
in a humidity test chamber in which the value of relative humidity should be
controlled within +2 % to -3 % of the specified relative humidity levels (as
specified in IEC 60068-2-78).
7 Vibration
The initial resonance search shall be carried out to study behaviour of the DUT
to determine any component resonances and the corresponding resonance
frequencies, and to obtain information for comparison with the final resonance
search.
The satisfactory mechanical condition of the DUT shall be verified at the end of
the tests with a visual examination for any deformation or cracks in the
components or mountings.
8 Shock, drop and topple
The test shall be made according to the test procedure Ec of IEC 60068-2-31
and according to the free fall method reported in GB/T 17214.3-2000.
Before the test, reference measurements of lower range-value and span shall
be recorded.
9 Mounting position
Where the DUT might be position sensitive, the change in lower range-value
and span caused by 10° inclinations from the position(s) specified by the
manufacturer shall be measured and recorded in percent of output span.
......
Source: Above contents are excerpted from the full-copy PDF -- translated/reviewed by: www.ChineseStandard.net / Wayne Zheng et al.
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