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GB/T 20730.2-2019 English PDF (GBT20730.2-2019)

GB/T 20730.2-2019 English PDF (GBT20730.2-2019)

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GB/T 20730.2-2019: Instruments with analogue inputs and two-or multi-state outputs for use in industrial-process control systems -- Part 2: Guidance for inspection and routine testing

GB/T 20730.2-2019
Instruments with analogue inputs and two-or multi-state outputs for use in industrial-process control systems--Part 2. Guidance for inspection and routine testing ICS 25.040.40
N11
National Standards of People's Republic of China
Industrial process control system
Analog input two or more output meters
Part 2. Guidelines for inspections and routine tests
industrial-processcontrolsystems-Part 2.Guidanceforinspectionand
Routinetesting
(IEC 61003-2.2016, Industrial-processcontrolsystems-Instruments
Part 2.Guidanceforinspectionandroutinetesting,IDT)
2019-05-10 released.2019-12-01 implementation
State market supervision and administration
China National Standardization Administration issued
Foreword
GB/T 20730 "Industrial Process Control System with Analog Input Two or More Output Instruments" is divided into two parts. --- Part 1. Performance assessment methods;
--- Part 2. Inspection and routine test guidelines.
This part is the second part of GB/T 20730.
This part is drafted in accordance with the rules given in GB/T 1.1-2009. This section uses the translation method equivalent to IEC 61003-2.2016 "Industrial Process Control System Analog Input Two or More Output Instruments Table 2. Guidelines for inspections and routine tests.
The documents of our country that have a consistent correspondence with the international documents referenced in this part are as follows. ---GB/T 18271 (all parts) Process measurement and control device general performance evaluation methods and procedures [IEC 61298 ( There are some)];
--- GB/T 18271.4-2017 Process measurement and control devices - General performance assessment methods and procedures - Part 4. Assessment Content of the report (IEC 61298-4.2008, IDT);
--- GB/T 20730.1-2006 Industrial process control systems with analog input two or more output meters - Part 1. Performance Evaluation method (IEC 61003-1..2004, IDT).
This part was proposed by the China Machinery Industry Federation.
This part is under the jurisdiction of the National Industrial Process Measurement Control and Automation Standardization Technical Committee (SAC/TC124). This section drafted by. Fujian Hongrun Precision Instrument Co., Ltd., Shanghai Industrial Automation Instrumentation Research Institute Co., Ltd., Shanghai Metrology Testing Technology Research Institute, Shanghai Instrumentation Automatic Control System Inspection and Testing Institute Co., Ltd. The main drafters of this section. Chen Zhiyang, Li Minghua, Zhu Chenbin, Wang Jianing, Xiao Honglian. Industrial process control system
Analog input two or more output meters
Part 2. Guidelines for inspections and routine tests
1 Scope
This part of GB/T 20730 gives an indication of inspection and routine testing of electric and pneumatic instruments with two or more outputs. South, for example, an acceptance test or a post-repair test. This part can be combined with IEC 61003-1.2016, GB/T 18271.2-2017, GB/T 18271.3-2017 is used together.
This part of GB/T 20730 is applicable to electric and pneumatic industrial process instruments with measured values as continuous signals. Its setting can be either Mechanical quantities (such as position, force, etc.) can also be standard signals. These meters can be used as controllers, alarm switches or other similar applications. The quantitative criteria for acceptable performance of the meter are determined by the manufacturer and the user, and the test report indicates which tests were performed. Manufacturer and Users can agree on the requirements of this section.
2 Normative references
The following documents are indispensable for the application of this document. For dated references, only dated versions apply to this article. Pieces. For undated references, the latest edition (including all amendments) applies to this document. GB/T 18271.2-2017 Methods and procedures for the evaluation of general performance - Part 2. Part 2 Test (IEC 61298-2.2008, IDT)
GB/T 18271.3-2017 Methods and procedures for the evaluation of general performance - Part 3 Test (IEC 61298-3.2008, IDT)
IEC 61003-1.2016 Industrial process control systems - Analog input two or more output devices - Part 1. Performance appraisal Method (Industrial-processcontrolsystems-Instrumentswithanalogueinputsandtwo-ormulti-stateout- puts-Part 1.Methodsofevaluatingperformance)
IEC 61298 (all parts) Process measurement and control device general performance assessment methods and procedures [Processmeasurement] andcontroldevices-Generalmethodsandproceduresforevaluatingperformance]
IEC 61298-4 Methods and procedures for the evaluation of general performance - Part 4. Assessment report content (Processmeasurementandcontroldevices-Generalmethodsandproceduresforevaluatingperform- ance-Part 4.Evaluationreportcontent)
3 Terms and definitions
The following terms and definitions defined in GB/T 18271.2-2017 and IEC 61003-1.2016 apply to this document. 3.1
Acceptance test acceptance test
A test conducted in accordance with the contract to prove to the buyer that the instrument complies with certain conditions of the product specification. 4 test sampling
Usually the routine test performs a full test. Sampling tests may also be conducted if the user agrees with the manufacturer. When taking a sampling test, the instrument to be tested can be taken by the inspector of the user. 5 performance test
5.1 General
The test items for routine test and acceptance test are shown in Table 1. The test sequence shall be such that the previous test does not affect the results of the latter test. The following test conditions, test methods and test procedures are consistent with IEC 61003-1.2016 and IEC 61298. Table 1 Test items
No. Name This section number IEC 61003-1..2016 article number
Inaccuracy of switching points
Poorly inaccurate switching
Adjustable, measurable or indicated set point
Adjustable but not indicated set point
Unadjustable set point
The value of the measured value
Insulation strength a
Multi-bit output characteristics
Determination of the switching range
5.3
6.1.1.2
6.1.1.4
6.1.3.1
6.1.3.2
6.1.3.3
6.3.2
6.3.4
7.2.1
7.2.3
Power supply voltage change b
Gas source pressure change
5.4
6.2.8
6.2.11
a For safety instruments only.
b Routine tests do not test for frequency changes.
5.2 Test conditions
5.2.1 Environmental conditions
The environmental conditions are as follows.
--- Temperature. 15 ° C ~ 25 ° C;
---Relative humidity. 45%~75%;
---Atmospheric pressure. 86kPa~106kPa;
---Electromagnetic field. If it is involved, the value should be specified. The maximum allowable rate of change of ambient temperature during the test should be 1 ° C/10 min and less than 3 ° C/h. 5.2.2 Source conditions
power supply.
---Rated voltage. tolerance ± 1%;
---Rated frequency. tolerance ± 1%;
---Harmonic distortion (AC power). < 5%;
--- Ripple (DC power supply). < 0.1%.
Gas source.
---Rated pressure. tolerance ± 3%;
---Supply temperature. ambient temperature ± 2 ° C;
---Supply humidity. the dew point is at least 10 ° C lower than the device body temperature; --- Oily dust content.
Oil. less than 1×10-6 by weight;
Dust. no dust particles larger than 3μm in diameter.
5.3 Test under reference conditions
5.3.1 General
All tests specified in 6.1 and 6.3 of IEC 61003-1.2016 are to be carried out. Multiple outputs should be added for IEC 61003-1.2016 The test specified in Chapter 7. For detailed test procedures, see GB/T 18271.2-2017. 5.3.2 Set point
5.3.2.1 Adjustable, measurable or indicated set points
The set point should be tested at least at 10%, 50%, and 90%, and 50% at the end. Accurate measurement or indication The degree should be determined at five points where the full scale is roughly equal. 5.3.2.2 Adjustable but not indicated set points
The set point shall be tested at least 3 points that are approximately equally distributed within the effectively adjustable range. 5.3.2.3 Unadjustable set point
The set point should be tested directly.
5.3.2.4 Set point of multi-bit output
Each output position should be tested in accordance with the requirements of 5.3.2.1, 5.3.2.2 and 5.3.2.3. Test of the interaction between each pair of switching points For the test method, see 7.2.2 of IEC 61003-1.2016.
5.4 Tests affecting the impact of quantity
5.4.1 General
When performing the influence amount impact test, the set point is not less than one point. For instruments that can be measured or indicated, it is also advisable to perform the measured values. test. For instruments with adjustable set points, it is advisable to include 50% of this point. The influence of the influence on the switching point should be in accordance with 6.2 of IEC 61003-1.2016 and GB/T 18271.3-2017. test.
5.4.2 Power supply voltage change
The instrument that requires internal power supply for internal operation shall perform this test. For two-wire instruments, select the nominal value or some other suitable value for the load resistor and record the value. During the test, the power supply voltage is sequentially set to the nominal value, the maximum value, and the minimum value. 5.4.3 Gas source pressure change
This test shall be carried out on instruments using a pneumatic source. The test pressure shall be 1.1 times the nominal value, the nominal value or the maximum value specified by the manufacturer, 0.85 times the nominal value or the most specified by the manufacturer. Small value.
6 test report
6.1 General
After all tests are completed, an evaluation test report shall be prepared in accordance with IEC 61298-4. After the test report is issued, all original documents of the relevant test shall be kept by the laboratory for at least 2 years. 6.2 Test report
See Table 2 for an example of the summary of test results included in the test report. Table 2 Test report
The serial number name refers to the file unit listed in the report information. 1 Inaccuracy of switching points
GB/T 18271.2-2017
4.1.7
The switch point x1, switch point x2 and their average value should be included in the report. The switching difference (x2-x1) of each cycle should be recorded.
Any increase or decrease in input, any of x1 and x2 of any cycle
The maximum positive and negative deviation of a measured value against the set point w should be taken as a cut Inaccuracy of exchange points is included in the report
2 Switching the inaccuracy of the difference
GB/T 18271.2-2017
4.1.7.1
The difference between the average of x1 and the average of x2 should be taken as the Xsd column Into the report.
Any measured value of the switching difference calculated for each of the 5 cycles The maximum positive and negative deviations from the Xsd value should be used as the inaccuracy of the switching difference Inclusion report
Adjustable, measurable or have
Indicated set point
GB/T 18271.2-2017
4.1.7.1 and 4.1.7.6
At each set point of each cycle, the xm measurement is ideally set
The maximum positive and negative deviation of the value should be used as the set inaccuracy of the set point Inclusion report
Adjustable but not indicated
set point
GB/T 18271.2-2017
4.1.7.1 and 4.1.7.6
The x1, x2 and Xsd values and their accuracy-related factors and xm values should Inclusion report
5 non-adjustable set point
GB/T 18271.2-2017
4.1.7.1 and 4.1.7.6
The x1, x2 and Xsd values and their accuracy-related factors and xm values should Inclusion report
6 The value of the measured value shall record the change of the measured value of the measured value. 7 dielectric strength
GB/T 18271.2-2017
6.3.3
Any significant transient overvoltages that occur during the test should be included in the report. Table 2 (continued)
The serial number name refers to the file unit listed in the report information. 8 multi-output characteristics
Each person should be reported xi1, xi2, xmi, xsdi, xi1-xi2, xsri if necessary Also calculate xmi-w, (see IEC 61003-1.2016 Figure 2)
9 power supply voltage change
GB/T 18271.3-2017
12.1
% The impact on the switching point (and measured values) during the test should be included in the report 10 air source pressure change a
GB/T 18271.3-2017
12.8
% The impact on the switching point should be included in the report a
a If the manufacturer-specified limit is less than the preferred test value, this should be stated in the test results.

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