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HJ 654-2013: [Including 2018XG1] Specifications and Test Procedures for Ambient Air Quality Continuous Automated Monitoring System for SO2, NO2, O3 and CO
HJ 654-2013
HJ
NATIONAL ENVIRONMENTAL PROTECTION
STANDARD OF THE PEOPLE’S REPUBLIC OF CHINA
Specifications and test procedures for ambient air
quality continuous automated monitoring system for
SO2, NO2, O3 and CO
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 
Specifications and test procedures for ambient air
quality continuous automated monitoring system for
SO2, NO2, O3 and CO
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
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.
5.1.1.2 The surface of the monitoring system instrument shall be intact, with
no obvious defects. The components shall be connected reliably, and the
operation keys and buttons shall be flexible and valid.
5.1.1.3 The instrument main unit panel shall be clear in display, and easy to
identify characters and identifications.
5.1.2 Operating conditions
The monitoring system shall function properly under the following conditions.
(1) Ambient temperature. (15 ~ 35) °C;
(2) Relative humidity. ≤ 85%;
(3) Atmospheric pressure. (80 ~ 106) kPa;
(4) Supply voltage. AC (220 ± 22) V, (50 ± 1) Hz.
NOTE 1. Under special environmental conditions such as low temperature and low pressure, the
instruments and equipment shall be configured to meet the requirements of local environmental 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 20MΩ.
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
sampling manifold stably.
(3) The materials used for the sampling device shall be selected from materials
that do not chemically react with the monitored pollutants and do not
release interfering substances. Generally, it is made of
polytetrafluoroethylene (PTFE) or borosilicate glass, etc. Stainless steel is
also available for the sampling manifold used to monitor NO2 and SO2 only.
(4) The inner diameter of the sampling manifold is within the range of 1.5cm to
15cm. The airflow in the manifold shall be laminar. The residence time of
the sample gas in the manifold shall be less than 20s. Meanwhile, the
pressure of the collected gas sample shall be close to atmospheric
pressure. The branch connector shall be placed in the laminar flow area of
the sampling manifold. The distance between the branch connectors is
greater than 8cm.
(5) In order to prevent condensation on the inner wall of the sampling manifold
due to the difference in indoor and outdoor air temperatures, the sampling
manifold shall be equipped with a thermal insulation sleeve or heater. The
heating temperature is generally controlled at (30 to 50) °C.
(6) The pipeline connecting the analytical instrument to the branch connector
shall be made of materials that do not chemically react with the monitored
pollutants and do not release the interfering substances; the length shall
not exceed 3m, and the air outlet of the air conditioner shall be prevented
from being directly blown to the sampling manifold and the branch pipe.
(7) The pipeline connecting the analytical instrument to the branch connector
shall be equipped with a PTFE membrane with a pore diameter of ≤ 5μm.
(8) The pipeline connecting the analytical instrument to the branch connector
shall be extended to the position where the manifold is close to the center
when connecting the manifold.
(9) When not using the sampling manifold, it can be sampled directly in the
pipeline. However, the sampling pipeline shall use materials that do not
chemically react with the monitored pollutants and do not release interfering
substances. The time that the sample gas is trapped in the sampling
pipeline shall be less than 20s.
5.1.4.2 Calibration device
(1) The calibration device of the monitoring system shall be capable of
automatic calibration.
(2) The zero gas quality of the zero gas generator shall comply with the
requirements of Annex A.
(3) Atmospheric pressure. (80 ~ 106) kPa.
5.2.2.3 Supply voltage
AC (220 ± 22) V, (50 ± 1) Hz.
NOTE 2. Under special environmental conditions such as low temperature and low pressure, the
instruments and equipment shall be configured to meet the requirements of local environmental conditions.
5.2.3 Safety requirements
SEE 5.1.3 for safety requirements.
5.2.4 Functional requirements
5.2.4.1 Calibration unit
(1) The monitoring system shall be capable of automatically recording and
measuring the light spectrum;
(2) The equivalent calibration device shall be equipped with at least 4 calibration
cells of different lengths. The materials of the calibration cell shall be made
of materials with high UV transmittance. The calibration frame and the light
source emitting device shall be firmly connected.
5.2.4.2 Analytical instrument as well as data acquisition and
transmission equipment
(1) Able to display and set the system time.
(2) Able to display the parameter information of the internal working status of
the instrument, and record the working status information of the system at
least every 5min.
(3) Able to disp...