JJG 695-2019_English: PDF (JJG695-2019)
Standard ID | Contents [version] | USD | STEP2 | [PDF] delivered in | Standard Title (Description) | Status | PDF |
JJG 695-2019 | English | 329 |
Add to Cart
|
3 days [Need to translate]
|
Sulfur Hydrogen Gas Detectors
| Valid |
JJG 695-2019
|
JJG 695-2003 | English | 170 |
Add to Cart
|
0--9 seconds. Auto-delivery
|
Verification Regulation of Sulfur Hydrogen Gas Detectors
| Obsolete |
JJG 695-2003
|
JJG 695-1990 | English | 519 |
Add to Cart
|
4 days [Need to translate]
|
Regulation of Verification for Hydrogen Sulfide Gas Analyzer
| Obsolete |
JJG 695-1990
|
Standard ID | JJG 695-2019 (JJG695-2019) | Description (Translated English) | Sulfur Hydrogen Gas Detectors | Sector / Industry | Metrology & Measurement Industry Standard | Classification of Chinese Standard | A61 | Classification of International Standard | 17.020 | Word Count Estimation | 14,152 | Date of Issue | 2019 | Date of Implementation | 2020-03-27 | Drafting Organization | Shanghai Institute of Metrology and Testing Technology, China Institute of Testing Technology | Administrative Organization | National Technical Committee on Environmental Stoichiometry | Issuing agency(ies) | State Administration for Market Regulation | Standard ID | JJG 695-2003 (JJG695-2003) | Description (Translated English) | Verification Regulation of Sulfur Hydrogen Gas Detectors | Sector / Industry | Metrology & Measurement Industry Standard | Classification of Chinese Standard | A61 | Word Count Estimation | 14,195 | Date of Issue | 2003-09-23 | Date of Implementation | 2004-03-23 | Older Standard (superseded by this standard) | JJG 695-1990 | Drafting Organization | Shanghai Institute of Measurement and Testing | Administrative Organization | National Technical Committee on Environment stoichiometric | Regulation (derived from) | State Administration of Quality Supervision, Inspection and Quarantine Notice 2003 No. 106 | Issuing agency(ies) | State Administration of Quality Supervision, Inspection and Quarantine | Summary | This standard applies to hydrogen sulfide gas detector initial verification, testing and use of the follow-up inspection. | Standard ID | JJG 695-1990 (JJG695-1990) | Description (Translated English) | Regulation of Verification for Hydrogen Sulfide Gas Analyzer | Sector / Industry | Metrology & Measurement Industry Standard | Classification of Chinese Standard | A61 | Word Count Estimation | 13,197 | Date of Issue | 1990/7/4 | Date of Implementation | 1990/11/1 | Regulation (derived from) | The State Administration of Quality Supervision, Inspection and Quarantine Notice 2003 No. 106 |
JJG 695-2019
Sulfur Hydrogen Gas Detectors
National Measurement Verification Regulations of the People's Republic of China
Hydrogen sulfide gas detector
2019-09-27 release
2020-03-27 Implementation
Issued by the State Administration of Market Supervision and Administration
Hydrogen sulfide gas detector
Verification regulations
Replace JJG 695-2003
Focal point: National Technical Committee for Environmental Chemometrics
Main drafting unit: Shanghai Institute of Metrology and Testing Technology
China Testing Technology Research Institute
Participated in the drafting unit: Gansu Metrology Research Institute
Shanghai Ladi Technology Co:, Ltd:
This regulation is entrusted to the National Environmental Chemometrics Technical Committee for interpretation
The main drafters of this regulation:
Chen Lan (Shanghai Institute of Metrology and Testing Technology)
Qing Liu (China Institute of Testing Technology)
Cai Jianhua (Shanghai Institute of Metrology and Testing Technology)
Participating drafters:
Shi Jianwei (Shanghai Institute of Metrology and Testing Technology)
Wanli (China Institute of Testing Technology)
Shi Liyu (Gansu Metrology Research Institute)
Qi Jiaju (Shanghai Laidi Technology Co:, Ltd:)
table of Contents
Introduction (Ⅱ)
1 Scope (1)
2 Overview (1)
3 Measurement performance requirements (1)
4 General technical requirements (1)
4:1 Appearance and structure (1)
4:2 Marks and logos (1)
4:3 Power-on inspection (2)
4:4 Alarm function (2)
4:5 Insulation resistance (2)
5 Control of measuring instruments (2)
5:1 Verification conditions (2)
5:2 Verification items (2)
5:3 Verification method (3)
5:4 Processing of verification results (5)
5:5 Verification period (5)
Appendix A Verification Record Format (6)
Appendix B Format of the inner pages of the certificate of verification/certification result (8)
introduction
This regulation is a revision of JJG 695-2003: The revision of this regulation refers to GB 12358-2006 "Workplace
The general technical requirements of the environmental gas detection and alarm instrument of the Institute ", GB/T 13971-2013" Technical Article of UV Gas Analyzer
"", GB/T 25923-2010 "Online Gas Analyzer Technical Conditions" and other technical regulations: With JJG 695-
Compared with:2003, the main technical changes except for editorial changes are as follows:
--- Modified the scope of application (see 1):
--- Modified the measurement performance requirements, respectively listed the measurement performance requirements of the analyzer and the detection alarm (see 3):
--- Delete the alarm setting error verification item, and add the alarm function verification item to the instrument with alarm function
(See 4:4):
--- Modify the appearance item in the original regulations to "appearance and structure", "signs and logo", "power-on inspection", etc:
Three items (see 4:1, 4:2, 4:3):
--- Delete the insulation strength verification items, and delete the insulation strength tester and insulation strength verification method:
--- The relative expansion uncertainty and inclusion factor of gas reference materials are determined by the original relative expansion uncertainty
If it is greater than 2%, k = 3 is modified to a relative expansion uncertainty of not greater than 2%, k = 2: When using a gas dilution device,
The relative expansion uncertainty of the standard gas after dilution shall meet the above requirements (see 5:1:2:1):
--- Changed the format of the verification record, the verification certificate and the internal page format of the verification result notification (see Appendix A, Appendix
B):
The previous releases of this regulation are:
--- JJG 695-2003;
--- JJG 695-1990:
Verification Regulation of Hydrogen Sulfide Gas Detector
1 Scope
This regulation is applicable to the first verification, subsequent verification and in-use inspection of hydrogen sulfide gas detector: Hydrogen sulfide gas
The detector includes a hydrogen sulfide gas detection alarm and a hydrogen sulfide gas analyzer:
2 Overview
Hydrogen sulfide gas detector (hereinafter referred to as instrument) is mainly used to detect sulfide in the workplace environment and production process
The concentration of hydrogen gas: For the instrument with alarm function, when the displayed value is greater than the alarm setting value, there should be sound, light or vibration
Call the police: The instrument is mainly composed of gas circuit unit, detection unit, signal processing unit, alarm unit and display unit:
The detection principle is mainly electrochemical method, spectroscopy, etc: According to the sampling method, it is divided into diffusion type, positive pressure conveying type and pump suction type:
According to the usage mode, it is divided into portable and fixed: It can be divided into non-continuous measurement and continuity measurement according to working mode:
3 Measurement performance requirements
See Table 1 for metering performance requirements:
Table 1 Measurement performance requirements
Project hydrogen sulfide gas analyzer hydrogen sulfide gas detection alarm
Indication error ± 10%
± 2μmol/mol or ± 10%
(Just one of them)
Response time ≤90s ≤60s
Repeatability ≤1:5% ≤2%
drift
Zero drift ± 2% FS
Range drift ± 3% FS
Note: FS indicates the full scale of the instrument:
4 General technical requirements
4:1 Appearance and structure
4:1:1 The instrument should not have any appearance damage that would affect its normal operation: The surface of the newly manufactured instrument should be smooth, flat and painted
The coating is uniform without peeling and rusting:
4:1:2 The adjustment parts shall be able to operate normally, and the fasteners shall be free from looseness:
4:2 Marks and logos
The instrument name, model, number, name of the manufacturer, date of manufacture, measurement range, maximum allowable error, etc:
......
JJG 695-2003
NATIONAL METROLOGY & CALIBRATION REGULATION
OF THE PEOPLE’S REPUBLIC OF CHINA
Replacing JJG 695-1990
Sulfur hydrogen gas detectors
ISSUED ON: SEPTEMBER 23, 2003
IMPLEMENTED ON: MARCH 23, 2004
Issued by: General Administration of Quality Supervision, Inspection and
Quarantine of PRC
Table of Contents
1 Scope ... 4
2 Overview ... 4
3 Metrological performance requirements ... 4
3.1 Indication error ... 4
3.2 Repeatability ... 4
3.3 Response time ... 4
3.4 Drift ... 5
3.5 Alarm setting error ... 5
4 General technical requirements ... 5
4.1 Appearance ... 5
4.2 Insulation resistance ... 6
4.3 Dielectric strength ... 6
5 Control of measuring instrument ... 6
5.1 Verification conditions ... 6
5.2 Verification items ... 7
5.3 Verification method ... 7
5.4 Processing of verification result ... 10
5.5 Verification period ... 11
Appendix A Verification record format of hydrogen sulfide gas detector ... 12
Appendix B Format of verification certificate (inner page) ... 14
Appendix C Format of verification result notice (inner page) ... 15
Verification regulation of sulfur hydrogen gas
detectors
1 Scope
This regulation applies to the first verification, subsequent verification and in-
use inspection of hydrogen sulfide gas detectors.
2 Overview
The hydrogen sulfide gas detector (hereinafter referred to as the instrument)
mainly comprises an electrochemical sensor or an optical sensor, as well as an
electronic component and a display portion. The sensor converts hydrogen
sulfide gas in the environment into an electrical signal and displays it in a
concentration (molar fraction).
The instrument is divided into diffused type and pumped type.
3 Metrological performance requirements
3.1 Indication error
The indication error of the instrument is as shown in Table 1.
Table 1
Hydrogen sulfide
gas detector
Measuring range Limit of indication error
Molar fraction X (H2S): ≤ 100 x 10-6 ± 5 x 10-6
Molar fraction X (H2S): > 100 x 10-6 ± 5%FS
3.2 Repeatability
The relative standard deviation shall be not more than 2%.
3.3 Response time
For diffused-type instrument, it is not more than 60 s; for pumped-type
instrument, it is not more than 30 s.
observe whether the instrument has alarm sound and whether the alarm light
flashes, check the alarm set point of the instrument.
4.2 Insulation resistance
For instruments which use 220V AC, the phase-to-ground insulation resistance
of the power supply is not less than 40 MΩ.
4.3 Dielectric strength
For instruments which use 220V AC, the insulation strength of the phase-
connected line to ground of the power supply shall be able to withstand the AC
voltage of 1500V, 50Hz, for a test duration of 1 min, without breakdown and
arcing.
5 Control of measuring instrument
Instrument control includes first verification, subsequent verification, in-use
inspection.
5.1 Verification conditions
5.1.1 Environmental conditions for verification
5.1.1.1 Ambient temperature: 0 ~ 40 °C (fluctuation ≤ 5 °C)
5.1.1.2 Relative humidity: ≤ 85%
5.1.2 Equipment for verification
5.1.2.1 Gas reference material
The hydrogen sulfide standard gas which has a concentration of 20%, 50%, 80%
of the full scale and 1.5 times the alarm set point is used, which have an
uncertainty of not more than 2% (k = 3).
5.1.2.2 Zero calibration gas
High-purity nitrogen or clean air.
5.1.2.3 Flowmeter
(0 ~ 1) L/min, the accuracy level is not less than level 4.
for 1 min, the current is 5 mA. Then the voltage is smoothly lowered to 0 V. The
instrument shall not have breakdown and arcing during the whole test.
5.3.4 Indication error
After preheating and stabilization, the instrument uses the zero gas and a
standard gas with a concentration of about 80% of the upper limit of the
measurement range. After calibrating the zero point and the indication value of
the instrument, within the measurement range, respectively lead in the standard
gas which has a concentration of about 20% and 50%, respectively, of the upper
limit of measurement range (if the instrument has two measuring ranges, it shall
lead in at least one standard gas within the low measuring range). Record the
actual reading after leading in the gas. Repeat the above procedures for 3 times.
Use the formula (1) or (2) to calculate the indication error of each verification
point:
Where:
- The average of the readings;
As - Standard value;
R - Measuring range.
When the instrument's range is > 100 × 10-6, it is calculated by formula (1), take
the Δe of the maximum absolute value as the indication error of the instrument.
When the instrument's range is ≤ 100 × 10-6, it is calculated by formula (2), take
the Δe of the maximum absolute value as the indication error of the instrument.
5.3.5 Repeatability
After the instrument is stabilized by preheating and its zero point calibrated by
the zero point standard gas, lead in the standard gas which has a concentration
of about 50% of the measuring range. After the reading is stable, record the
measured value. Repeat the above measuring procedure for 6 times.
Respectively record the reading Ai. The repeatability is indicated by the relative
standard deviation Δc. Use the formula (3) to calculate the repeatability of the
instrument:
When the instrument's range is > 100 × 10-6, it is calculated by formula (4), take
the Δzi of the maximum absolute value as the zero drift of the instrument.
When the instrument's range is ≤ 100 × 10-6, it is calculated by formula (5), take
the Δzi of the maximum absolute value as the zero drift of the instrument.
Calculate the indication drift according to formula (6) or (7):
When the instrument's range is > 100 × 10-6, it is calculated by formula (6), take
the Δsi of the maximum absolute value as the indication drift of the instrument.
When the instrument's range is ≤ 100 × 10-6, it is calculated by formula (7), take
the Δsi of the maximum absolute value as the indication drift of the instrument.
5.3.8 Measurement of alarm error
After the instrument is stabilized by preheating, use the zero point gas and the
standard gas which has a concentration of about 80% of the upper limit of the
measuring range, to calibrate the zero point and the indication value of the
instrument. Then lead in the standard gas which has a concentration about 1.5
times the alarm set point (As). Record the actual alarm concentration (Ai) of the
instrument. Remove the standard gas. Lead in the zero point gas to zero the
instrument. Repeat the above procedures for 3 times. Use the formula (8) to
calculate the alarm set error of the instrument:
Take the ΔAi of the maximum absolute value as the alarm set error of the
instrument.
5.4 Processing of verification result
The instruments as verified and qualified according to the requirements of this
regulation will be issued a verification certificate. The instrument failing to pass
the verification will be issued a verification result notice, on which the
unqualified items are indicated.
......
|