HJ 654-2013 PDF English
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HJ 654-2013: Specifications and test procedures for ambient air quality continuous automated monitoring system for SO2, NO2, O3 and CO
---This is an excerpt. Full copy of true-PDF in English version (including equations, symbols, images, flow-chart, tables, and figures etc.), auto-downloaded/delivered in 9 seconds, can be purchased online: https://www.ChineseStandard.net/PDF.aspx/HJ654-2013
HJ
NATIONAL ENVIRONMENTAL PROTECTION
Specifications and test procedures for ambient air
quality continuous automated monitoring system for
SO2, NO2, O3 and CO
[Including 2018XG1]
Issued on. JULY 30, 2013
Implemented on. AUGUST 1, 2013
Issued by. Ministry of Environmental Protection
Table of Contents
Foreword... 3
1 Scope of application... 4
2 Normative references... 4
3 Terms and definitions... 4
4 System composition and structure... 6
5 Specifications... 9
6 Performance indicators... 14
7 Test procedures... 19
8 Test items... 35
Annex A (Normative) Performance indicators of the zero gas generator... 38
Annex B (Normative) Data acquisition and processing requirements of the
monitoring system... 39
Annex C (Informative) Raw data record sheet for monitoring system
performance testing... 43
HJ 654-2013 (2018XG1)... 48
1 Scope of application
This Standard specifies the composition, specifications, test indicators and test
procedures for ambient air quality continuous automated monitoring system for
SO2, NO2, O3 and CO.
This Standard is applicable to the design, production and testing of ambient air
quality continuous automated monitoring system for SO2, NO2, O3 and CO.
2 Normative references
This Standard refers to the terms in the following documents. For undated
references, the latest editions apply to this Standard.
GB 3095-2012 Ambient air quality standards
GB 4793.1 Safety requirements for electrical equipment for measurement,
control, and laboratory use -- Part 1.General requirements (IEC 61010-
1.2001, IDT)
3 Terms and definitions
The following terms and definitions apply to this Standard.
3.1 Ambient air quality continuous monitoring
The process of continuous sample collection, processing and analysis of
ambient air quality using a continuous monitoring instrument at monitoring
points.
3.2 Point analyzer
A monitoring and analysis instrument that takes ambient air through a sampling
system at a fixed point and determines the concentration of air pollutants.
3.3 Open path analyzer
An apparatus for determining the average concentration of air pollutants over
the optical path of the beam by means of a method of emitting a beam of light
from the transmitting end through an open environment to a receiving end.
3.4 Zero drift
The deviation between the reading of the instrument and the zero input after
the instrument has been operated for a specified period of time without
maintenance, care or adjustment.
3.5 Span drift
The deviation between the reading of the instrument and the known reference
value after the instrument has been operated for a specified period of time
without maintenance, care or adjustment.
3.6 Period of unattended operation
The time interval during which the instrument meets the requirements of the
indicator for long-term drift (�� 7d) without manual maintenance and calibration.
4 System composition and structure
The monitoring system is divided into a point continuous monitoring system and
an open optical path continuous monitoring system. The monitoring system
analysis method is shown in Table 1.
4.1 Point continuous monitoring system
4.1.1 System composition
The monitoring system consists of a sampling device, a calibration device, an
analytical instrument, data acquisition and transmission equipment, as shown
4.1.2 Sampling device
Multiple point analytical instruments can share a multi-branch sampling device
for sample collection. The materials and installation of the sampling device shall
not affect the instrument measurement. The specific requirements for the
sampling device are given in 5.1.4.1.
4.1.3 Calibration device
The calibration device consists mainly of a zero gas generator and a multi-gas
dynamic calibrator. The calibration device is used to calibrate the analytical
instrument. SEE 5.1.4.2 for specific requirements for calibration device.
4.2 Open optical path continuous monitoring system
4.2.1 System composition
The monitoring system consists of an open measuring optical path, calibration
unit, analytical instrument, data acquisition and transmission equipment, as
shown in Figure 2.
4.2.2 Open measuring optical path
The path from the transmitting end to the receiving end of the light source.
4.2.3 Calibration unit
By using the principle of equivalent concentration, calibration cells of different
lengths are set up on the measuring optical path to equivalent standard-gas of
different concentrations to complete the calibration.
The calibration unit structure is shown in Figure 3.
4.2.4 Analytical instrument
The analytical instrument is used to measure gaseous pollutants in ambient air
on an open optical path.
5 Specifications
5.1 Point continuous monitoring system
5.1.1 Appearance requirements
5.1.1.1 The monitoring system shall have a product nameplate indicated with
the instrument name, model, production organization, factory number, date of
manufacture, etc.
5.1.2 Operating conditions
The monitoring system shall function properly under the following conditions.
5.1.3 Safety requirements
5.1.3.1 Insulation resistance
Under the conditions of ambient temperature of (15 ~ 35) ��C, and relative
humidity of �� 85%, the insulation resistance of the instrument power terminal to
the ground or the casing shall not be less than 20M��.
5.1.3.2 Insulation strength
Under the conditions of ambient temperature of (15 ~ 35) ��C, and relative
humidity of �� 85%, the instrument will last for 1min under the 1500V (RMS
value), 50Hz sine wave test voltage, and there shall be no breakdown or arcing.
5.1.4 Functional requirements
5.1.4.1 Sampling device
5.2 Open optical path continuous monitoring system
5.2.1 Appearance requirements
SEE 5.1.1 for appearance requirements.
5.2.2 Working conditions
The monitoring system shall function properly under the following conditions.
5.2.2.1 Outdoor components
Ambient temperature. (-30 ~ 50) ��C;
5.2.2.2 Indoor components
5.2.3 Safety requirements
SEE 5.1.3 for safety requirements.
5.2.4 Functional requirements
5.2.4.1 Calibration unit
6 Performance indicators
6.1 Point continuous monitoring system
6.1.1 Analytical instrument
6.1.1.1 Measurement range
Measurement range of SO2, NO2, and O3 analytical instruments. (0 ~ 500) ppb,
and the minimum display unit is 0.1ppb or 0.1��g/m3;
Measurement range of CO analytical instrument. (0 ~ 50) ppb, and the minimum
display unit is 0.1ppm or 0.1mg/m3.
6.2.13 Effect of calibration cell length
The effect of the calibration cell length of the SO2, NO2, and O3 analytical
instruments is ��2%.
6.2.14 Effect of light source intensity
The effect of the light source intensity of the SO2 and NO2 analytical instruments
is ��2% of full scale;
The effect of the light source intensity of the O3 analytical instrument is ��4% of
full scale.
6.2.15 Unattended operation hours
7 Test procedures
7.1 Point continuous monitoring system
7.1.1 Zero noise
After the analytical instrument to be tested is stable, the zero standard-gas is
injected into the analytical instrument. The average value ri (recorded as 1 data)
of the time period data is recorded every 2min, and at least 25 data are obtained.
The standard deviation S0 of the obtained data is calculated according to
Formula (1), that is, the zero noise of the analytical instrument, which shall meet
the requirements of 6.1.1.2.
7.1.2 Minimum detection limit
The minimum detection limit, RDL, of the analytical instrument to be tested is
calculated according to Formula (2), which shall meet the requirements of
6.1.1.3.
7.1.3 Span noise
After the analytical instrument to be tested is stable, 80% span standard-gas is
injected into the analytical instrument. The average value ri (recorded as 1 data)
of the time period data is recorded every 2min, and at least 25 data are obtained.
The standard deviation S of the obtained data is calculated according to
Formula (3), that is, the span noise of the analytical instrument, which shall
meet the requirements of 6.1.1.4.
7.1.4 Indication error
After the analytical instrument to be tested is running stably, after zero
calibration and full-scale calibration, INJECT the standard-gas with a
concentration of about 50% of full scale. After the reading is stable, RECORD
the displayed value; then INJECT the zero calibration gas, REPEAT the test 3
times, and CALCULATE the indication error, Le, of the analytical instrument to
be tested, which shall meet the requirements of 6.1.1.5.
8 Test items
The test items of ambient air quality continuous automated monitoring system
for SO2, NO2, O3 and CO are shown in Tables 4, 5 and 6.
......
Source: Above contents are excerpted from the full-copy PDF -- translated/reviewed by: www.ChineseStandard.net / Wayne Zheng et al.
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