GB/T 22264.1-2022 Mounted digital display electric measuring instruments—Part 1：Definitions and general requirements common to all parts (English Version)
Introduction
Mounted digital display electric measuring instruments are installed in various power distribution cabinets and boxes, which are widely used in industrial and mining enterprises, electric power, metallurgy, chemical engineering, energy, medical and transportation, etc. The application scenarios are constantly widened. The Edition 2008 of GB/T 22264 series of standards has been issued and used for more than 10 years. With the changes of technology and market, it can no longer adapt to the development of technology and the needs of users.
GB/T 22264 aims to standardize the technical specifications and safety requirements of mounted digital display electric measuring instruments in combination with the latest product technologies and user requirements at home and abroad, and put forward corresponding test methods, so as to provide a product specification for manufacturers and users who use such electric measuring instruments, reflecting most requirements of product ordering technical specifications.
This revision intends to modify the title of Part 8 of GB/T 22264. GB/T 22264 covers the following eight parts:
——Part 1: Definitions and general requirements common to all parts;
——Part 2: Special requirements for ammeters and voltmeters;
——Part 3: Special requirements for wattmeters and varmeters;
——Part 4: Special requirements for frequency meters;
——Part 5: Special requirements for phase meters and power factor meters;
——Special requirements for insulation resistance meters;
——Part 7: Special requirements for multi-function instruments;
——Part 8: Test methods.
In recent years, the international safety requirements for the product have become increasingly stringent. This revision, combined with IEC 61010-1:2010 and GB/T 17215.211-2021, has modified the safety-related content, clarified the terms used, and improved product safety performance.
Mounted digital display electric measuring instruments — Part 1: Definitions and general requirements common to all parts
1 Scope
This standard specifies terms and definitions, product classification, grading and conformity, technical requirements, information, general signs and symbols, packaging, storage and transportation, and inspection rules for mounted digital display electric measuring instruments.
This standard is applicable to newly manufactured mounted digital display electric measuring instruments for measuring various electric parameters in power distribution systems with nominal frequencies of 50 Hz or 60 Hz below 750 V DC and 690 V AC.
Note: The above-mentioned "in power distribution system below 750V DC" does not apply to frequency meter, phase meter and power factor meter.
This document is applicable to the following mounted electric measuring instruments with digital display for measuring electric parameters:
——ammeter and voltmeter;
——wattmeter and varmeter;
——frequency meter;
——phase meter and power factor meter;
——insulation resistance meter;
——multi-function instruments of any two or more combinations of the above forms;
——digital display part of electrical measuring instrument with dual analogue-digital display.
This document is not applicable to:
——electric measuring instruments having only direct-action analog indications;
——portable digital display electric measuring instruments;
——special purpose instruments for which other standards (or industry standards) apply.
Note: This document does not specify the size of the instrument. See GB/T 1242-2000 for the size requirements of the instrument.
2 Normative references
The following documents, in whole or in part, are normatively referenced in this document and are indispensable for its application. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies.
GB/T 2423.1-2008 Environmental testing — Part 2: Test methods — Tests A: Cold
GB/T 2423.2-2008 Environmental testing for electric and electronic products — Part 2:Test methods — Tests B: Dry heat
GB/T 2423.4-2008 Environmental testing for electric and electronic products — Part 2: Test method — Test Db: Damp heat, cyclic (12h+12h cycle)
GB/T 2423.5-2019 Environmental testing—Part 2: Test methods—Test Ea and guidance: Shock
GB/T 2423.10-2019 Environmental testing — Part 2: Tests methods — Test Fc: Vibration (sinusoidal)
GB/T 2829-2002 Sampling procedures and tables for periodic inspection by attributes (Apply to inspection of process stability)
GB/T 4208-2017 Degrees of protection provided by enclosure (IP code)
GB/T 5169.10-2017 Fire hazard testing for electric and electronic products — Part 10: Glowing/hot-wire based test methods — Glow-wire apparatus and common test procedure
GB/T 13384 General specifications for packing of mechanical and electrical product
GB/T 16927.1 High-voltage test techniques — Part 1: General definitions and test requirements
GB/T 17215.9311-2017 Electricity metering equipment — Dependability — Part 311: Accelerated reliability testing — Elevated temperature and humidity
GB/T 17626.2 Electromagnetic compatibility — Testing and measurement techniques — Electrostatic discharge immunity test
GB/T 17626.3 Electromagnetic compatibility — Testing and measurement techniques — Radiated, radio-frequency, electromagnetic field immunity test
GB/T 17626.4 Electromagnetic Compatibility — Testing and Measurement Techniques — Electrical Fast Transient/Burst Immunity Test
GB/T 17626.5 Electromagnetic compatibility — Testing and measurement techniques — Surge immunity test
GB/T 17626.6 Electromagnetic compatibility — Testing and measurement techniques — Immunity to conducted disturbances, induced by radio-frequency fields
GB/T 17626.11 Electromagnetic compatibility — Testing and measurement techniques — Voltage dips, short interruptions and voltage variations immunity tests
GB/T 17626.18 Electromagnetic compatibility — Testing and measurement techniques — Damped oscillatory magnetic field immunity test
GB/T 25480-2010 Basic environmental conditions and testing methods for transportation and storage of instruments
CISPR 32:2015 Electromagnetic compatibility of multimedia equipment — Emission requirements
3 Terms and definitions
For the purposes of this document, the terms and definitions given in GB/T 17215.9311-2017 and the following apply.
3.1 General terms
3.1.1
electric measuring instrument
instrument for measuring electrical quantity or non-electrical quantity by electrical or electronic methods
[Source: GB/T 2900.77-2008, 311-03-04, modified]
3.1.2
digital display instrument
measuring instrument that displays the measurand value in digital form
[Source: IEC 60050-300: 2001, 312-02-10]
Note 1 to entry: This term refers only to the form of the display and not to the operating principle of the instrument.
Note 2 to entry: Unless otherwise specified, all AC quantities stated in this document are root mean square (r.m.s.) values.
3.1.3
dual analogue-digital display
method of indicating the measurand with a digital display and a light band scale
[Source: GB/T 2900.77-2008, 311-05-09, modified]
3.1.4
single function instrument
instrument for measuring only one electrical or non-electrical parameter
[Source: IEC 60050-300: 2001, 312-02-22]
3.1.5
multi-function instrument
instrument with a single display that measures more than one electrical parameter or non-electrical parameter (e.g., current, voltage, and power)
[Source: IEC 60050-300: 2001, 312-02-23]
3.1.6
ammeter
measuring instrument of current
[Source: GB/T 2900.79-2008, 313-01-01, modified]
3.1.7
voltmeter
measuring instrument of voltage
[Source: GB/T 2900.79-2008, 313-01-03, modified]
3.1.8
wattmeter
measuring instrument of power
[Source: GB/T 2900.79-2008, 313-01-06, modified]
3.1.9
varmeter
measuring instrument of reactive power
[Source: GB/T 2900.79-2008, 313-01-07]
3.1.10
frequency meter
instrument for measuring the frequency of periodic quantities
[Source: GB/T 2900.79-2008, 313-01-12, modified]
3.1.11
phase meter
instrument that measures the phase difference between two AC quantities of the same frequency, using one of them as the reference phase
[Source: GB/T 2900.79-2008, 313-01-13]
3.1.12
power factor meter
instrument for measuring the ratio of active power to apparent power in a circuit
[Source: GB/T 2900.79-2008, 313-01-14]
3.1.13
insulation resistance meter
instrument for measuring insulation resistance
[Source: GB/T 2900.79-2008, 313-01-11]
3.1.14
warm-up time
time duration between the moment of energization and the moment when the instrument is ready for use, as specified by this standard
[Source: GB/T 2900.77-2008, 311-03-18, modified]
3.1.15
preconditioning time
time elapsed from the moment the specified measurand value is added to the internal test circuit to the moment when the instrument reaches the required accuracy
[Source: GB/T 2900.77-2008, 311-03-19, modified]
3.1.16
preliminary adjustment
pre-operation for adjustment of the instrument adjustable mechanism as required by the product technical documentation
3.1.17
peak factor
ratio of the peak of the periodic volume to its root mean square value
[Source: IEC 60050-103: 2009, 103-06-15]
3.1.18
distortion factor
ratio of the root mean square of the harmonic content to the root mean square of the fundamental wave content
[Source: OIML R 46-1/-2:2012, 2.2.13]
3.2 Terms of instrument structure characteristics
3.2.1
measuring circuit (of an instrument)
internal circuit part of a meter that is powered by voltage and current, one or both of which are the major factors in determining the measured display value
3.2.2
current circuit
measuring circuit through which the current is equal to or proportional to the current connected to an instrument
Note: The current may be:
——the current directly measured;
——proportional current supplied by external current transformer;
——current introduced by external shunt.
[Source: GB/T 2900.89-2012, 312-01-01, modified]
3.2.3
voltage circuit
measuring circuit on which the voltage applied is the voltage of the circuit to which the instrument is connected
Note: The voltage may be:
——voltage directly measured;
——proportional voltage supplied by external voltage transformer or voltage divider;
——voltage divided by external series resistor or impedance.
[Source: GB/T 2900.89-2012, 312-01-02, modified]
3.2.4
auxiliary supply
AC or DC supply other than the measured quantity
3.3 Input-related terms
3.3.1
input terminal
connection terminal applying the measured (converted) quantity to the instrument
3.3.2
input signal
signal applied to the input
3.3.3
overload
amount of input load exceeding the upper limit of the measuring range is overload, which is expressed by its difference
[Source: GB/T 2900.1-2008, 3.3.148, modified]
3.3.4
transformation ratio of a current transformer
ratio of primary current to secondary current of current transformer
[Source: IEC 60050-321: 1986, 321-01-17]
3.3.5
transformation ratio of a voltage transformer
ratio of primary voltage to secondary voltage of voltage transformer
[Source: IEC 60050-321: 1986, 321-01-18]
3.3.6
series mode voltage
unwanted part of the input voltage superimposed on the measured voltage
Note: Typical examples of series mode voltages are induced voltages, such as ripples or thermoelectric EMFs on a DC current signals.
[Source: GB/T 2900.89-2012, 312-01-04]
3.3.7
common mode voltage
part with the same amplitude and phase or polarity in each input voltage present between each input terminal and the reference point
Note: The reference point may be the chassis end, the measuring ground end or an inaccessible point.
[Source: GB/T 2900.89-2012, 312-01-03]
3.3.8
series mode rejection ratio; SMRR
ratio of a series mode voltage causing a specified change in the output information to a voltage causing the same change in the output caused by the measurand
Note 1: Series mode rejection ratio is generally expressed in decibels and is dependent on frequency, waveform and measurement method.
Note 2: Series mode rejection ratio can also be applied to for quantities other than voltage.
[Source: GB/T 2900.89-2012, 312-06-22]
3.3.9
common mode rejection ratio; CMRR
ratio of the voltage applied between the specified reference point and the input terminal (when connected by a specified circuit) to the voltage applied between the input terminals to produce the same output
Note 1: Common mode rejection ratio is generally expressed in decibels and is dependent on frequency, waveform and measurement method.
Note 2: Common mode rejection ratio may also be applied to quantities other than voltage.
[Source: GB/T 2900.89-2012, 312-06-21]
3.4 Output-related terms
3.4.1
output terminal
connection terminal that provides measured output information in the form of a specified voltage (current) or outputs in a specified impedance state
3.4.2
output signal
analog or digital representation of the measurand generated through the instrument
[Source: GB/T 2900.90-2012, 314-04-06, modified]
3.5 Terms related to instrument performance
3.5.1
performance
characteristics of the ability of the instrument to achieve the expected function
[Source: GB/T 2900.77-2008, 311-06-11, modified]
3.5.2
measuring range
range limited by the two values of the measurand, within which the error limit of the instrument is specified
Note: An instrument may be used for several measuring ranges.
[Source: GB/T 290077-2008, 311-03-12, modified]
3.5.3
span
algebraic difference between the upper and lower limits of the measuring range
[Source: GB/T 2900.77-2008, 311-03-13]
3.5.4
reference conditions
values and (or) ranges specified for a set of influence quantities under which the allowable error limits of the instrument are minimized
[Source: GB/T 2900.77-2008, 311-06-02, modified]
3.5.5
reference value
specified value of a certain influence quantity under reference conditions
[Source: GB/T 2900.77-2008, 311-07-01]
3.5.6
reference range
specified range of influence quantity values under reference conditions
[Source: GB/T 290077-2008, 311-07-02]
3.5.7
intrinsic error
error of instrument in use under reference conditions
[Source: GB/T 2900.77-2008, 311-03-08, modified]
Note: This term is used to approximate the "true value".
3.5.8
accuracy class
classification of instruments, each of which shall conform to a set of specifications for errors
[Source: GB/T 290077-2008, 311-06-09, modified]
3.5.9
full scale value
upper limit of measuring range
Note: The full scale value may not be the maximum display value.
3.5.10
nominal value
quantity against which the relative performance of the instrument is determined
3.5.11
nominal voltage
Un
voltage value against which the relative performance of the instrument is determined
3.5.12
nominal current
In
current value against which the relative performance of the instrument is determined
3.5.13
nominal frequency
fn
frequency value against which the relative performance of the instrument is determined
3.5.14
variation
difference between the display values of the instrument for the same measured value or the difference between the values of the material measure when two different values are successively taken for a certain influence quantity
[Source: GB/T 2900.77-2008, 311-07-03, modified]
3.5.15
nominal range of use
value range specified for the influence quantity, in which the variation caused by the influence quantity does not exceed the specified value
[Source: GB/T 2900.77-2008, 311-07-05]
3.5.16
operating error
error of performance characteristic obtained at any point within the nominal range of use
3.5.17
resolution
smallest observable change in the display value that causes the measurand to change
[Source: GB/T 2900.77-2008, 311-03-10, modified]
3.5.18
stability
ability of an instrument to maintain its performance characteristics constant over a specified time interval when all other conditions are equal
Note: It may be divided into short-term (24 h) stability and long-term (over 90 d) stability in terms of the length of time.
[Source: GB/T 2900.77-2008, 311-06-12, modified]
3.5.19
repeatability
degree of consistency between continuous measurements of the same measurand under the same measuring conditions. The same measuring conditions are as follows:
——the same measuring steps;
——the same observer;
——use the same measuring instrument under the same conditions;
——in the same laboratory;
——the time interval is relatively short.
[Source: GB/T 2900.77-2008, 311-06-06]
3.5.20
response time
time required to apply an input signal at a specified quantity until its display value stabilizes within a specified error range
3.5.21
step response time
duration from the moment when the measurand undergoes a specified abrupt change to the moment when the displayed value reaches and maintains its steady-state value within a specified limit
[Source: GB/T 2900.77-2008, 311-06-04, modified]
3.5.22
polarity response time
duration from the moment when the input signal is applied at a specified value to the moment when the polarity of the display value changes
3.5.23
overload recovery time
duration from the moment when the specified overload input signal is removed to the moment when the display value of the instrument reaches a stable value within the measuring range
3.6 Terms related to inspection
3.6.1
type test
conformity test on one or several instruments of the same type selected by the manufacturer to verify that the type of instrument meets all the requirements specified in this document
3.6.2
routine inspection
end-of-manufacturing inspection
conformity evaluation of each product in manufacturing or after completion
3.6.3
periodic inspection
inspection to determine whether the stability of the production process within the specified period meets the requirements, from a batch by batch inspection of a batch or several batches of samples taken from the inspection
4 Product classification, grading and conformity
4.1 Classification
4.1.1 Classification by measured electrical parameters
It may be divided into single-function instrument and multi-function instrument such as ammeter, voltmeter, wattmeter, varmeter, frequency meter, phase meter, power factor meter, insulation resistance meter, etc.
4.1.2 Classification by measurement methods of voltage and current
It may be divided into root-mean-square measuring instrument and non-root-mean-square measuring instrument.
4.1.3 Classification by phase of measurement
It may be divided into single-phase instrument and multi-phase instrument.
4.1.4 Classification by property of measuring circuit
It may be divided into DC instrument and AC instrument.
4.1.5 Classification by power supply
It may be divided into self-supply instrument and instrument with auxiliary supply.
4.1.6 Classification by the access modes of the measurand to the instrument
It may be divided into direct access instrument and indirect access instrument.
4.1.7 Classification by display modes
It may be divided into all-digital display and digital display with trend display (analog indication).
Contents
Foreword i
Introduction vi
1 Scope
2 Normative references
3 Terms and definitions
3.1 General terms
3.2 Terms of instrument structure characteristics
3.3 Input-related terms
3.4 Output-related terms
3.5 Terms related to instrument performance
3.6 Terms related to inspection
4 Product classification, grading and conformity
4.1 Classification
4.2 Grading
5 Technical requirements
5.1 Standard electric quantity
5.2 Reference conditions and intrinsic errors
5.3 Nominal range of use and variation
5.4 Safety requirements
5.5 Electrical requirements
5.6 Accuracy and performance requirements
5.7 Electromagnetic compatibility
5.8 Structural requirements
5.9 Climate impacts
5.10 Reliability
6 Information, conventional signs and symbols
6.1 Information
6.2 Signs, symbols and their locations
6.3 Marking of nominal range of use and reference value or reference range
6.4 Marks and symbols for terminals
7 Inspection rules
7.1 Type test
7.2 Routine tests (End-of-manufacturing inspection)
7.3 Periodic inspection
8 Packaging, storage and transportation
8.1 Packaging
8.2 Storage and transportation
Annex A (Nominative) Allowable error and changes
Annex B (Nominative) Relation between relative humidity and ambient temperature
Annex C (Informative) Peck temperature-humidity model
Bibliography
Figure B.1 Relationship between ambient temperature and relative humidity
Table 1 Groups of use
Table 2 Standard nominal voltage
Table 3 Standard nominal current
Table 4 Reference conditions and allowable deviations
Table 5 Nominal range of use limits and allowable variation
Table 6 Surface temperature limits under normal operating condition
Table 7 Temperature limits for terminals
Table 8 Peak pulse voltages
Table 9 AC voltage (r.m.s value)
Table 10 Power consumption
Table 11 Electromagnetic compatibility test grade and technical requirements
Table 12 Temperature and test duration of high temperature test
Table 13 Temperature and duration of low temperature test
Table 14 Symbols for Instruments
Table 15 Information display location
GB/T 22264.1-2022 Mounted digital display electric measuring instruments—Part 1：Definitions and general requirements common to all parts (English Version)
Standard No.
GB/T 22264.1-2022
Status
valid
Language
English
File Format
PDF
Word Count
19500 words
Price(USD)
585.0
Implemented on
2022-11-1
Delivery
via email in 1 business day
Detail of GB/T 22264.1-2022
Standard No.
GB/T 22264.1-2022
English Name
Mounted digital display electric measuring instruments—Part 1：Definitions and general requirements common to all parts
Introduction
Mounted digital display electric measuring instruments are installed in various power distribution cabinets and boxes, which are widely used in industrial and mining enterprises, electric power, metallurgy, chemical engineering, energy, medical and transportation, etc. The application scenarios are constantly widened. The Edition 2008 of GB/T 22264 series of standards has been issued and used for more than 10 years. With the changes of technology and market, it can no longer adapt to the development of technology and the needs of users.
GB/T 22264 aims to standardize the technical specifications and safety requirements of mounted digital display electric measuring instruments in combination with the latest product technologies and user requirements at home and abroad, and put forward corresponding test methods, so as to provide a product specification for manufacturers and users who use such electric measuring instruments, reflecting most requirements of product ordering technical specifications.
This revision intends to modify the title of Part 8 of GB/T 22264. GB/T 22264 covers the following eight parts:
——Part 1: Definitions and general requirements common to all parts;
——Part 2: Special requirements for ammeters and voltmeters;
——Part 3: Special requirements for wattmeters and varmeters;
——Part 4: Special requirements for frequency meters;
——Part 5: Special requirements for phase meters and power factor meters;
——Special requirements for insulation resistance meters;
——Part 7: Special requirements for multi-function instruments;
——Part 8: Test methods.
In recent years, the international safety requirements for the product have become increasingly stringent. This revision, combined with IEC 61010-1:2010 and GB/T 17215.211-2021, has modified the safety-related content, clarified the terms used, and improved product safety performance.
Mounted digital display electric measuring instruments — Part 1: Definitions and general requirements common to all parts
1 Scope
This standard specifies terms and definitions, product classification, grading and conformity, technical requirements, information, general signs and symbols, packaging, storage and transportation, and inspection rules for mounted digital display electric measuring instruments.
This standard is applicable to newly manufactured mounted digital display electric measuring instruments for measuring various electric parameters in power distribution systems with nominal frequencies of 50 Hz or 60 Hz below 750 V DC and 690 V AC.
Note: The above-mentioned "in power distribution system below 750V DC" does not apply to frequency meter, phase meter and power factor meter.
This document is applicable to the following mounted electric measuring instruments with digital display for measuring electric parameters:
——ammeter and voltmeter;
——wattmeter and varmeter;
——frequency meter;
——phase meter and power factor meter;
——insulation resistance meter;
——multi-function instruments of any two or more combinations of the above forms;
——digital display part of electrical measuring instrument with dual analogue-digital display.
This document is not applicable to:
——electric measuring instruments having only direct-action analog indications;
——portable digital display electric measuring instruments;
——special purpose instruments for which other standards (or industry standards) apply.
Note: This document does not specify the size of the instrument. See GB/T 1242-2000 for the size requirements of the instrument.
2 Normative references
The following documents, in whole or in part, are normatively referenced in this document and are indispensable for its application. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies.
GB/T 2423.1-2008 Environmental testing — Part 2: Test methods — Tests A: Cold
GB/T 2423.2-2008 Environmental testing for electric and electronic products — Part 2:Test methods — Tests B: Dry heat
GB/T 2423.4-2008 Environmental testing for electric and electronic products — Part 2: Test method — Test Db: Damp heat, cyclic (12h+12h cycle)
GB/T 2423.5-2019 Environmental testing—Part 2: Test methods—Test Ea and guidance: Shock
GB/T 2423.10-2019 Environmental testing — Part 2: Tests methods — Test Fc: Vibration (sinusoidal)
GB/T 2829-2002 Sampling procedures and tables for periodic inspection by attributes (Apply to inspection of process stability)
GB/T 4208-2017 Degrees of protection provided by enclosure (IP code)
GB/T 5169.10-2017 Fire hazard testing for electric and electronic products — Part 10: Glowing/hot-wire based test methods — Glow-wire apparatus and common test procedure
GB/T 13384 General specifications for packing of mechanical and electrical product
GB/T 16927.1 High-voltage test techniques — Part 1: General definitions and test requirements
GB/T 17215.9311-2017 Electricity metering equipment — Dependability — Part 311: Accelerated reliability testing — Elevated temperature and humidity
GB/T 17626.2 Electromagnetic compatibility — Testing and measurement techniques — Electrostatic discharge immunity test
GB/T 17626.3 Electromagnetic compatibility — Testing and measurement techniques — Radiated, radio-frequency, electromagnetic field immunity test
GB/T 17626.4 Electromagnetic Compatibility — Testing and Measurement Techniques — Electrical Fast Transient/Burst Immunity Test
GB/T 17626.5 Electromagnetic compatibility — Testing and measurement techniques — Surge immunity test
GB/T 17626.6 Electromagnetic compatibility — Testing and measurement techniques — Immunity to conducted disturbances, induced by radio-frequency fields
GB/T 17626.11 Electromagnetic compatibility — Testing and measurement techniques — Voltage dips, short interruptions and voltage variations immunity tests
GB/T 17626.18 Electromagnetic compatibility — Testing and measurement techniques — Damped oscillatory magnetic field immunity test
GB/T 25480-2010 Basic environmental conditions and testing methods for transportation and storage of instruments
CISPR 32:2015 Electromagnetic compatibility of multimedia equipment — Emission requirements
3 Terms and definitions
For the purposes of this document, the terms and definitions given in GB/T 17215.9311-2017 and the following apply.
3.1 General terms
3.1.1
electric measuring instrument
instrument for measuring electrical quantity or non-electrical quantity by electrical or electronic methods
[Source: GB/T 2900.77-2008, 311-03-04, modified]
3.1.2
digital display instrument
measuring instrument that displays the measurand value in digital form
[Source: IEC 60050-300: 2001, 312-02-10]
Note 1 to entry: This term refers only to the form of the display and not to the operating principle of the instrument.
Note 2 to entry: Unless otherwise specified, all AC quantities stated in this document are root mean square (r.m.s.) values.
3.1.3
dual analogue-digital display
method of indicating the measurand with a digital display and a light band scale
[Source: GB/T 2900.77-2008, 311-05-09, modified]
3.1.4
single function instrument
instrument for measuring only one electrical or non-electrical parameter
[Source: IEC 60050-300: 2001, 312-02-22]
3.1.5
multi-function instrument
instrument with a single display that measures more than one electrical parameter or non-electrical parameter (e.g., current, voltage, and power)
[Source: IEC 60050-300: 2001, 312-02-23]
3.1.6
ammeter
measuring instrument of current
[Source: GB/T 2900.79-2008, 313-01-01, modified]
3.1.7
voltmeter
measuring instrument of voltage
[Source: GB/T 2900.79-2008, 313-01-03, modified]
3.1.8
wattmeter
measuring instrument of power
[Source: GB/T 2900.79-2008, 313-01-06, modified]
3.1.9
varmeter
measuring instrument of reactive power
[Source: GB/T 2900.79-2008, 313-01-07]
3.1.10
frequency meter
instrument for measuring the frequency of periodic quantities
[Source: GB/T 2900.79-2008, 313-01-12, modified]
3.1.11
phase meter
instrument that measures the phase difference between two AC quantities of the same frequency, using one of them as the reference phase
[Source: GB/T 2900.79-2008, 313-01-13]
3.1.12
power factor meter
instrument for measuring the ratio of active power to apparent power in a circuit
[Source: GB/T 2900.79-2008, 313-01-14]
3.1.13
insulation resistance meter
instrument for measuring insulation resistance
[Source: GB/T 2900.79-2008, 313-01-11]
3.1.14
warm-up time
time duration between the moment of energization and the moment when the instrument is ready for use, as specified by this standard
[Source: GB/T 2900.77-2008, 311-03-18, modified]
3.1.15
preconditioning time
time elapsed from the moment the specified measurand value is added to the internal test circuit to the moment when the instrument reaches the required accuracy
[Source: GB/T 2900.77-2008, 311-03-19, modified]
3.1.16
preliminary adjustment
pre-operation for adjustment of the instrument adjustable mechanism as required by the product technical documentation
3.1.17
peak factor
ratio of the peak of the periodic volume to its root mean square value
[Source: IEC 60050-103: 2009, 103-06-15]
3.1.18
distortion factor
ratio of the root mean square of the harmonic content to the root mean square of the fundamental wave content
[Source: OIML R 46-1/-2:2012, 2.2.13]
3.2 Terms of instrument structure characteristics
3.2.1
measuring circuit (of an instrument)
internal circuit part of a meter that is powered by voltage and current, one or both of which are the major factors in determining the measured display value
3.2.2
current circuit
measuring circuit through which the current is equal to or proportional to the current connected to an instrument
Note: The current may be:
——the current directly measured;
——proportional current supplied by external current transformer;
——current introduced by external shunt.
[Source: GB/T 2900.89-2012, 312-01-01, modified]
3.2.3
voltage circuit
measuring circuit on which the voltage applied is the voltage of the circuit to which the instrument is connected
Note: The voltage may be:
——voltage directly measured;
——proportional voltage supplied by external voltage transformer or voltage divider;
——voltage divided by external series resistor or impedance.
[Source: GB/T 2900.89-2012, 312-01-02, modified]
3.2.4
auxiliary supply
AC or DC supply other than the measured quantity
3.3 Input-related terms
3.3.1
input terminal
connection terminal applying the measured (converted) quantity to the instrument
3.3.2
input signal
signal applied to the input
3.3.3
overload
amount of input load exceeding the upper limit of the measuring range is overload, which is expressed by its difference
[Source: GB/T 2900.1-2008, 3.3.148, modified]
3.3.4
transformation ratio of a current transformer
ratio of primary current to secondary current of current transformer
[Source: IEC 60050-321: 1986, 321-01-17]
3.3.5
transformation ratio of a voltage transformer
ratio of primary voltage to secondary voltage of voltage transformer
[Source: IEC 60050-321: 1986, 321-01-18]
3.3.6
series mode voltage
unwanted part of the input voltage superimposed on the measured voltage
Note: Typical examples of series mode voltages are induced voltages, such as ripples or thermoelectric EMFs on a DC current signals.
[Source: GB/T 2900.89-2012, 312-01-04]
3.3.7
common mode voltage
part with the same amplitude and phase or polarity in each input voltage present between each input terminal and the reference point
Note: The reference point may be the chassis end, the measuring ground end or an inaccessible point.
[Source: GB/T 2900.89-2012, 312-01-03]
3.3.8
series mode rejection ratio; SMRR
ratio of a series mode voltage causing a specified change in the output information to a voltage causing the same change in the output caused by the measurand
Note 1: Series mode rejection ratio is generally expressed in decibels and is dependent on frequency, waveform and measurement method.
Note 2: Series mode rejection ratio can also be applied to for quantities other than voltage.
[Source: GB/T 2900.89-2012, 312-06-22]
3.3.9
common mode rejection ratio; CMRR
ratio of the voltage applied between the specified reference point and the input terminal (when connected by a specified circuit) to the voltage applied between the input terminals to produce the same output
Note 1: Common mode rejection ratio is generally expressed in decibels and is dependent on frequency, waveform and measurement method.
Note 2: Common mode rejection ratio may also be applied to quantities other than voltage.
[Source: GB/T 2900.89-2012, 312-06-21]
3.4 Output-related terms
3.4.1
output terminal
connection terminal that provides measured output information in the form of a specified voltage (current) or outputs in a specified impedance state
3.4.2
output signal
analog or digital representation of the measurand generated through the instrument
[Source: GB/T 2900.90-2012, 314-04-06, modified]
3.5 Terms related to instrument performance
3.5.1
performance
characteristics of the ability of the instrument to achieve the expected function
[Source: GB/T 2900.77-2008, 311-06-11, modified]
3.5.2
measuring range
range limited by the two values of the measurand, within which the error limit of the instrument is specified
Note: An instrument may be used for several measuring ranges.
[Source: GB/T 290077-2008, 311-03-12, modified]
3.5.3
span
algebraic difference between the upper and lower limits of the measuring range
[Source: GB/T 2900.77-2008, 311-03-13]
3.5.4
reference conditions
values and (or) ranges specified for a set of influence quantities under which the allowable error limits of the instrument are minimized
[Source: GB/T 2900.77-2008, 311-06-02, modified]
3.5.5
reference value
specified value of a certain influence quantity under reference conditions
[Source: GB/T 2900.77-2008, 311-07-01]
3.5.6
reference range
specified range of influence quantity values under reference conditions
[Source: GB/T 290077-2008, 311-07-02]
3.5.7
intrinsic error
error of instrument in use under reference conditions
[Source: GB/T 2900.77-2008, 311-03-08, modified]
Note: This term is used to approximate the "true value".
3.5.8
accuracy class
classification of instruments, each of which shall conform to a set of specifications for errors
[Source: GB/T 290077-2008, 311-06-09, modified]
3.5.9
full scale value
upper limit of measuring range
Note: The full scale value may not be the maximum display value.
3.5.10
nominal value
quantity against which the relative performance of the instrument is determined
3.5.11
nominal voltage
Un
voltage value against which the relative performance of the instrument is determined
3.5.12
nominal current
In
current value against which the relative performance of the instrument is determined
3.5.13
nominal frequency
fn
frequency value against which the relative performance of the instrument is determined
3.5.14
variation
difference between the display values of the instrument for the same measured value or the difference between the values of the material measure when two different values are successively taken for a certain influence quantity
[Source: GB/T 2900.77-2008, 311-07-03, modified]
3.5.15
nominal range of use
value range specified for the influence quantity, in which the variation caused by the influence quantity does not exceed the specified value
[Source: GB/T 2900.77-2008, 311-07-05]
3.5.16
operating error
error of performance characteristic obtained at any point within the nominal range of use
3.5.17
resolution
smallest observable change in the display value that causes the measurand to change
[Source: GB/T 2900.77-2008, 311-03-10, modified]
3.5.18
stability
ability of an instrument to maintain its performance characteristics constant over a specified time interval when all other conditions are equal
Note: It may be divided into short-term (24 h) stability and long-term (over 90 d) stability in terms of the length of time.
[Source: GB/T 2900.77-2008, 311-06-12, modified]
3.5.19
repeatability
degree of consistency between continuous measurements of the same measurand under the same measuring conditions. The same measuring conditions are as follows:
——the same measuring steps;
——the same observer;
——use the same measuring instrument under the same conditions;
——in the same laboratory;
——the time interval is relatively short.
[Source: GB/T 2900.77-2008, 311-06-06]
3.5.20
response time
time required to apply an input signal at a specified quantity until its display value stabilizes within a specified error range
3.5.21
step response time
duration from the moment when the measurand undergoes a specified abrupt change to the moment when the displayed value reaches and maintains its steady-state value within a specified limit
[Source: GB/T 2900.77-2008, 311-06-04, modified]
3.5.22
polarity response time
duration from the moment when the input signal is applied at a specified value to the moment when the polarity of the display value changes
3.5.23
overload recovery time
duration from the moment when the specified overload input signal is removed to the moment when the display value of the instrument reaches a stable value within the measuring range
3.6 Terms related to inspection
3.6.1
type test
conformity test on one or several instruments of the same type selected by the manufacturer to verify that the type of instrument meets all the requirements specified in this document
3.6.2
routine inspection
end-of-manufacturing inspection
conformity evaluation of each product in manufacturing or after completion
3.6.3
periodic inspection
inspection to determine whether the stability of the production process within the specified period meets the requirements, from a batch by batch inspection of a batch or several batches of samples taken from the inspection
4 Product classification, grading and conformity
4.1 Classification
4.1.1 Classification by measured electrical parameters
It may be divided into single-function instrument and multi-function instrument such as ammeter, voltmeter, wattmeter, varmeter, frequency meter, phase meter, power factor meter, insulation resistance meter, etc.
4.1.2 Classification by measurement methods of voltage and current
It may be divided into root-mean-square measuring instrument and non-root-mean-square measuring instrument.
4.1.3 Classification by phase of measurement
It may be divided into single-phase instrument and multi-phase instrument.
4.1.4 Classification by property of measuring circuit
It may be divided into DC instrument and AC instrument.
4.1.5 Classification by power supply
It may be divided into self-supply instrument and instrument with auxiliary supply.
4.1.6 Classification by the access modes of the measurand to the instrument
It may be divided into direct access instrument and indirect access instrument.
4.1.7 Classification by display modes
It may be divided into all-digital display and digital display with trend display (analog indication).
Contents of GB/T 22264.1-2022
Contents
Foreword i
Introduction vi
1 Scope
2 Normative references
3 Terms and definitions
3.1 General terms
3.2 Terms of instrument structure characteristics
3.3 Input-related terms
3.4 Output-related terms
3.5 Terms related to instrument performance
3.6 Terms related to inspection
4 Product classification, grading and conformity
4.1 Classification
4.2 Grading
5 Technical requirements
5.1 Standard electric quantity
5.2 Reference conditions and intrinsic errors
5.3 Nominal range of use and variation
5.4 Safety requirements
5.5 Electrical requirements
5.6 Accuracy and performance requirements
5.7 Electromagnetic compatibility
5.8 Structural requirements
5.9 Climate impacts
5.10 Reliability
6 Information, conventional signs and symbols
6.1 Information
6.2 Signs, symbols and their locations
6.3 Marking of nominal range of use and reference value or reference range
6.4 Marks and symbols for terminals
7 Inspection rules
7.1 Type test
7.2 Routine tests (End-of-manufacturing inspection)
7.3 Periodic inspection
8 Packaging, storage and transportation
8.1 Packaging
8.2 Storage and transportation
Annex A (Nominative) Allowable error and changes
Annex B (Nominative) Relation between relative humidity and ambient temperature
Annex C (Informative) Peck temperature-humidity model
Bibliography
Figure B.1 Relationship between ambient temperature and relative humidity
Table 1 Groups of use
Table 2 Standard nominal voltage
Table 3 Standard nominal current
Table 4 Reference conditions and allowable deviations
Table 5 Nominal range of use limits and allowable variation
Table 6 Surface temperature limits under normal operating condition
Table 7 Temperature limits for terminals
Table 8 Peak pulse voltages
Table 9 AC voltage (r.m.s value)
Table 10 Power consumption
Table 11 Electromagnetic compatibility test grade and technical requirements
Table 12 Temperature and test duration of high temperature test
Table 13 Temperature and duration of low temperature test
Table 14 Symbols for Instruments
Table 15 Information display location
