JJF 1368-2012 PDF in English
JJF 1368-2012 (JJF1368-2012) PDF English
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Program of Pattern Evaluation of Combustible - Gas Alarm Detectors
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| JJF 1368-1995 | English | 199 |
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Operating technical norm of 6X10(3)N force secondary standard machine
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JJF 1368-2012: PDF in English JJF 1368-2012
TECHNICAL SPECIFICATIONS FOR MEASUREMENT
OF THE PEOPLE'S REPUBLIC OF CHINA
Program of Pattern Evaluation of
Combustible -- Gas Alarm Detectors
ISSUED ON. DECEMBER 03, 2012
IMPLEMENTED ON. MARCH 03, 2013
Issued by. The General Administration of Quality Supervision, Inspection and
Quarantine (AQSIQ) of The People's Republic of China
Program of Pattern Evaluation of Combustible --
Gas Alarm Detectors
Administrative organization. National Technical Committee of Environmental
Chemistry
Drafting organization. Hebei Provincial Institute of Metrology;
Measurement Supervision and Testing Institute of Hebei
Province
The National Technical Committee of Environmental Chemistry is entrusted to explain
this specification
Chief drafting staffs of this specification.
Feng Jinxin (Hebei Provincial Institute of Metrology)
Song Zengliang (Hebei Provincial Institute of Metrology)
Ma Ligen (Measurement Supervision and Testing Institute of Hebei Province)
Participated drafting staff.
Hao Jingkun (Hebei Provincial Institute of Metrology)
Han Jiangzhen (Measurement Supervision and Testing Institute of Hebei Province)
Bai Yuexia (Measurement Supervision and Testing Institute of Hebei Province)
Contents
Introduction ... 4
1 Scope ... 5
2 Normative References ... 5
3 General ... 5
4 Technical Data and Experimental Prototype Submitted by Application Organization ... 6
4.1 Technical Data ... 6
4.2 Experimental Prototype ... 6
5 Legal Management Requirements ... 6
5.1 Requirements for Measurement Unit ... 6
5.2 Requirements for Accuracy (Maximum Permissible Error) ... 6
5.3 Requirements for Legal Measurement Marking and Measuring Devices
Identification ... 6
5.4 Requirements for Installation Marking ... 7
5.5 Other Requirements ... 7
6 Measuring Requirements ... 7
7 General Technical Requirements ... 7
7.1 Appearance ... 7
7.2 Alarm Function and Alarm Operate Value ... 7
7.3 Long Term Stability (Applicable only to Detector with Fixed Installation) ... 8
7.4 Adaptability of Supply Voltage ... 8
7.5 Requirements for Secure Environment ... 8
7.6 Requirements for Climatic Environment ... 8
7.7 Requirements for Mechanical Environment ... 9
7.8 Requirements for Electromagnetic Compatibility ... 9
8 Lists of Pattern Evaluation Items ... 9
9 Test Methods and Condition for Test Items ... 10
9.1 Measuring Requirements ... 10
9.2 General Technical Requirements ... 14
10 Judgments and Treatment of Pattern Evaluation Result ... 20
11 Original Records Form for Pattern Evaluation ... 21
Appendix A Original Records Form for Pattern Evaluation of Combustible-gas Detectors . 22
References and Original Chinese Documents ... 42
Introduction
This program of pattern evaluation is prepared according to JJF 1015 "General Norm for
Pattern Evaluation and Pattern Approval of Measuring Instruments", JJF 1016 "The Rules for
Drafting Program of Pattern Evaluation of Measuring Instruments" and JJF 1001 "General
Terms in Metrology and Their Definitions".
Technical regulations such as JJG 693-2011 "Alarm Detectors of Combustible Gas", GB
12358-2006 "Gas Monitors and Alarms for Workplace General Technical Requirements", GB
15322-2003 "Combustible Gas Detector" and GB 16808-2008 "Combustible Gas Alarm
Control Units" are referenced by technical index of this program of pattern evaluation.
This program of pattern evaluation is issued for the first time.
TECHNICAL SPECIFICATIONS FOR MEASUREMENT
OF THE PEOPLE'S REPUBLIC OF CHINA
Program of Pattern Evaluation of Combustible --
Gas Alarm Detectors
1 Scope
This program of pattern evaluation applies to the combustible-gas alarm detectors
(including combustible gas detector, hereinafter referred to as "detector") used in non-shaft
operating environment and civil place.
2 Normative References
JJG 693-2011 “Alarm Detectors of Combustible Gas"
GB 12358-2006 “Gas Monitors and Alarms for Workplace-General Technical
Requirements"
GB 15322-2003 “Combustible Gas Detector"
GB 16808-2008 “Combustible Gas Alarm Control Units"
GB/T 17626.2-2006 “Electromagnetic Compatibility (EMC) -- Testing and
Measurement Techniques -- Electrostatic Discharge Immunity Test"
GB/T 17626.3-2006 “Electromagnetic Compatibility-Testing and Measurement
Techniques-Radiated Radio-frequency Electromagnetic Field Immunity Test"
GB/T 17626.4-2008 “Electromagnetic Compatibility-Testing and Measurement
Techniques-Electrical Fast Transient/Burst Immunity Test"
The provisions of above normative documents, through reference in this program,
constitute provisions of this program. For dated references, subsequent amendments to
(excluding any correction) or revisions are not applicable to this program. However, parties
who mutually agree to this program are encouraged to investigate the possibility of applying
the most recent editions of the normative documents indicated below. For undated references,
the latest edition of the respective normative document is applicable to this program.
3 General
After the stable power-on and preheating, provide the zero gas with a flow as required by
the instruction of the detector and the gas reference material with a concentration being 60%
of the full span of the detector into the detector, check the zero point and indication on the
detector. Run the detector for continuous 28d and never adjust and check the detector in this
test. At the last test day, provide the gas reference materials with concentration being 10%,
40% and 60% of the full span of the detector respectively and detect the indicated error.
9.2.3.5 Data processing
Same as 9.1.1.5.
9.2.3.6 Qualification criteria
It is qualified if the result is in accordance with those specified in 7.3.
9.2.4 Adaptability of supply voltage
9.2.4.1 Test purposes
To test whether the adaptability of supply voltage of the detector complies with 7.4
under the test conditions.
9.2.4.2 Test conditions
Same as 9.1.1.2.
9.2.4.3 Test equipment
a) Same as 9.1.1.3.
b) Voltmeter. AC voltage 0~1000V, DC voltage 0~200V; the accuracy higher than
Grade 1.0.
c) Power supply. 0~300V for AC; 0~50V for DC.
9.2.4.4 Test procedure
a) As for the AC powered detector, connect the power line of the detector on the
adjustable supply voltage which is set at the rated value. After the stable preheating, provide
the zero gas and gas reference material with a concentration being about 60% of the full span
into the detector and check the zero point and indication on the detector. Adjust the supply
voltage to the detector at 85% of the rated operating voltage and keep it stable for 20min,
provide the gas reference materials with concentration of 10%, 40% and 60% of full span of
the detector respectively, detect the indicated error thereof. Provide the zero gas so that the
detector is returned to the normal monitoring state. Adjust the supply voltage to the detector
at 115% of the rated operating voltage and keep it stable for 20min, provide the gas reference
materials with concentration of 10%, 40% and 60% of the full span of the detector
respectively and detect the indicated error thereof.
b) As for the DC powered detector, connect the power line of the detector on the
adjustable supply voltage which is set at the rated value. After the stable preheating...
......
Source: Above contents are excerpted from the PDF -- translated/reviewed by: www.chinesestandard.net / Wayne Zheng et al.
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