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JJG 1107-2015 (JJG1107-2015)

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JJG 1107-2015: PDF in English
JJG 1107-2015
JJG
National Metrological Verification Regulation
of the People’s Republic of China
Automatic Standard Pressure Generators
ISSUED ON. FEBRUARY 9, 2015
IMPLEMENTED ON. MAY 9, 2015
Issued by. General Administration of Quality Supervision, Inspection and
Quarantine of the People’s Republic of China.
Table of Contents
Foreword ... 5 
1 Scope ... 6 
2 Normative references ... 6 
3 Terms and units of measurement ... 6 
3.1 Terms ... 6 
3.2 Unit of measurement ... 7 
4 Overview ... 7 
5 Requirements of metrological performance ... 7 
5.1 Accuracy class ... 7 
5.2 Measurement function ... 7 
5.3 Control function ... 8 
6 General technical requirements ... 9 
6.1 Appearance ... 9 
6.2 Insulation resistance ... 9 
6.3 Insulating strength ... 9 
6.4 Tightness ... 9 
7 Control of metrological instruments ... 10 
7.1 Verification conditions ... 10 
7.2 Verification items ... 11 
7.3 Verification method ... 12 
7.4 Processing of verification results ... 17 
7.5 Verification cycle ... 18 
Appendix A ... 19 
Appendix B ... 20 
Appendix C ... 21 
Appendix D ... 22 
Appendix E ... 23 
Verification Regulation of
Automatic Standard Pressure Generators
1 Scope
This Regulation applies to the initial verification, subsequent verification, and in-service
inspection of -0.1 ~ 250MPa automatic standard pressure generators (hereinafter referred
to as “pressure generators”).
2 Normative references
This Regulation references the following documents.
JJG 875-2005 Verification Regulation of Digital Pressure Gauges
JJF 1001-2011 General Terms in Metrology and Their Definitions
JJF 1008-2008 Pressure Metrological Terms and Their Definitions
For dated references, only the versions with the dates indicated are applicable to this
Regulation. For undated references, the latest versions (including all the amendments)
are applicable to this Regulation.
3 Terms and units of measurement
3.1 Terms
3.1.1 Automatic standard pressure generator
It refers to the digital pressure gauge that can realize automatic control and display output
target pressure.
3.1.2 Control stability
It refers to the ability of pressure generators whose output pressure can maintain within
the limited boundary within a certain time limit.
3.1.3 Overshoot of pressure control
It refers to the maximum level for the pressure generators to exceed the target pressure
value in the process of controlling the pressure-increase.
3.1.4 Undershoot of pressure control
It refers to the maximum level for the pressure generators to be lower than the target
pressure value in the process of controlling the pressure-decrease.
3.1.5 Stable duration of target pressure
It refers to the time for the pressure generators to maintain the stable output target
7 Control of metrological instruments
The control of metrological instruments includes initial verification, subsequent verification,
and in-service inspection.
7.1 Verification conditions
7.1.1 Standard pressure gauge
7.1.1.1 Selection of the standard pressure gauges with measurement function
SELECT the standard pressure gauge with measurement function for verifying the
pressure generators from the following instruments.
a) Piston gauges (including single and double piston type pressure vacuum gauges,
and gas piston gauges);
b) Float-type manometers;
c) Liquid manometers;
d) Automatic standard pressure generators;
e) Digital pressure gauges.
The measuring range of the selected standard pressure gauge shall be greater than or
equal to that of the pressure generators. The absolute value of the maximum permissible
error of standard gauges shall be less than 1/3 of the absolute value of the maximum
permissible error of the indicating values of the under-verification pressure generators.
For those pressure generators with above class-0.05 (including 0.05), when the piston
gauge is selected to be standard gauge, the absolute value of the maximum permissible
error of standard gauges shall be less than 1/2 of the absolute value of the maximum
permissible error of the indicating values of pressure generators.
7.1.1.2 Selection of the standard gauges with control function
Respectively SELECT the standard pressure gauge with control function and the test
system with control function (hereinafter referred to as “test system”) for verifying the
pressure generators from the following instruments and systems.
a) Digital pressure gauges with high resolution;
b) The system composed of measuring transducer, acquisition system, and display.
The measuring range of the selected test system shall be greater than or equal to that of
the pressure generators. The absolute value of the maximum permissible error of test
systems shall not be greater than that of the indicating values of pressure generators,
while the resolution shall be greater than 1/10 of the absolute value of the maximum
permissible error of the indicating values of the under-verification pressure generators.
For those above class-0.01, the sampling frequency of the test system shall not be lower
than 10Hz. For those below class-0.02 (including 0.02), the sampling frequency of the test
system shall not be lower than 20Hz.
7.1.2 Auxiliary equipment
7.1.2.1 Insulation resistance tester. DC 100V, DC 500V, 10 levels.
7.1.2.2 Withstand voltage tester. The output voltage shall be AC 0~1.5kV. The frequency
is 45~55Hz. The output power shall not be lower than 0.25kW.
7.1.2.3 Pressure source. cylinders, manual pressure (vacuum) pumps, air compressors,
vacuum pumps, booster pumps, etc.
7.1.2.4 Other equipment. stopwatch, etc.
7.1.3 Conditions of verification environment
7.1.3.1 Ambient temperature.
For the pressure generators with above class-0.1 (including 0.1). (20 ± 2) °C; For the
pressure generators with below class-0.2 (including 0.2). (20 ± 5) °C.
7.1.3.2 Relative humidity. not greater than 85%.
7.1.3.3 No obvious mechanical vibration or external magnetic field (excluding the
geomagnetic field) shall exist near the standard gauges and the under-verification
pressure generators.
7.2 Verification items
See Table 4 for the verification items of pressure generators.
Table 4 Table for Verification Items
Verification Items Initial Verificatio
Subsequent
Verification
In-service
Verification
6.1 Appearance + + +
6.2 Insulation resistance + + -
6.3 Insulating strength + - -
6.4 Tightness + - -
5.2.1 Indication error + + +
5.2.2 Return error + + +
5.2.3 Zero drift + + -
5.2.4 Periodic stability - + -
5.3.1 Control stability + + +
5.3.2 Overshoot (Undershoot) of pressure control + + -
5.3.3 Stable duration of target pressure + + -
5.3.4 Response time of control + + -
on the same horizontal plane. When the two reference positions are not on the same
horizontal plane, the absolute value of the additional error of verification caused by the
altitude difference of reference positions shall not be greater than 1/10 of the absolute
value of the maximum permissible error of the indicating values of pressure generators.
Otherwise, i...
......
(Above excerpt was released on 2016-03-13, modified on 2021-06-07, translated/reviewed by: Wayne Zheng et al.)
Source: https://www.chinesestandard.net/PDF.aspx/JJG1107-2015