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HJ 654-2013 English PDF (HJ654-2013)

HJ 654-2013 English PDF (HJ654-2013)

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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

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.
HJ 654-2013
HJ
NATIONAL ENVIRONMENTAL PROTECTION
STANDARD OF THE PEOPLE 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 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
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 ??? 5??m.
(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 display the real-time data as well as to record and store valid data for at least 3 months, along with the function of querying historical data. (4) Have the time stamp function, and the data is the average of the set time period.
(5) Capable of digital signal output.
(6) Equipped with the Chinese data acquisition and control software.
(7) The monitoring data is collected, stored, and calculated in real time, and can be output in the form of a statement or a report. The mass concentration unit in the output standard state is ??g/m3, and has a mass concentration and volume concentration unit switching function.
80% span precision of CO analytical instrument. ??? 0.5 ppm.
6.1.1.7 24h zero drift
24h zero drift of SO2, NO2, and O3 analytical instruments. ?? 5 ppb;
24h zero drift of CO analytical instrument. ?? 1 ppm.
6.1.1.8 24h span drift
24h 20% span drift of SO2, NO2, and O3 analytical instruments. ?? 5 ppb; 24h 80% span drift of SO2, NO2, and O3 analytical instruments. ?? 10 ppb; 24h 20% span drift of CO analytical instrument. ?? 1 ppm;
24h 80% span drift of CO analytical instrument. ?? 1 ppm.
6.1.1.9 Response time (rise time / fall time)
Response time (rise time / fall time) of SO2, NO2, and O3 analytical instruments. ??? 5min;
Response time (rise time / fall time) of CO analytical instrument. ??? 4min. 6.1.1.10 Voltage stability
The supply voltage varies by ??10%, and the change in the analytical instrument reading. ??1% of full scale.
6.1.1.11 Flow stability
Flow stability. ?? 10%.
6.1.1.12 Effect of changes in ambient temperature
Within the ambient temperature range of 15~35??C.
Effect of changes in temperature of SO2 analytical instrument is ??? 1 ppb/??C; Effect of changes in temperature of NO2 analytical instrument is ??? 3 ppb/??C; Effect of changes in temperature of O3 analytical instrument is ??? 1 ppb/??C; Effect of changes in temperature of CO analytical instrument is ??? 0.3 ppm/??C. 6.1.1.13 Effect of interference components
The influence indicators of the analytical instrument?€?s interference components are shown in Table 2.
(2) Flow linearity error. ??1%;
(3) Ozone generation concentration error. ?? 2%.
6.2 Open optical path continuous monitoring system
6.2.1 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.
6.2.2 Zero noise
Zero noise of SO2, NO2, and O3 analytical instruments. ??? 1 ppb.
6.2.3 Minimum detection limit
Minimum detection limit of SO2, NO2, and O3 analytical instruments. ??? 2 ppb. 6.2.4 Span noise
80% span noise of SO2, NO2, and O3 analytical instruments. ??? 5 ppb.
6.2.5 Indication error
Indication error of SO2, and NO2 analytical instruments. ??2% of full scale; Indication error of O3 analytical instrument. ??4% of full scale.
6.2.6 Span precision
20% span precision of SO2, NO2, and O3 analytical instruments. ??? 5 ppb; 80% span precision of SO2, NO2, and O3 analytical instruments. ??? 10 ppb. 6.2.7 24h zero drift
24h zero drift of SO2, NO2, and O3 analytical instruments. ?? 5 ppb.
6.2.8 24h span drift
24h 20% span drift of SO2, NO2, and O3 analytical instruments. ?? 5 ppb; 24h 80% span drift of SO2, NO2, and O3 analytical instruments. ?? 10 ppb. 6.2.9 Response time (rise time / fall time)
Response time (rise time / fall time) of SO2, NO2, and O3 analytical instruments. ??? 5min.
Where.
USDn - The nth 24h 80% span drift of the analytical instrument to be tested, ppb (ppm);
M80n - The nth 80% span standard-gas measured value of the analytical
instrument to be tested, ppb (ppm).
7.1.7 Response time (rise time / fall time)
After the analytical instrument to be tested is running stably, the zero standard- gas is introduced. After the reading is stable, 80% span standard-gas is introduced and a chronograph is used to start timing. When the value displayed on the analytical instrument to be tested rises to 90% of the nominal value of the standard-gas concentration, the timing is stopped. The time taken for recording is the rise time of the analytical instrument to be tested. After the measurement reading of 80% span standard-gas is stable, the zero standard- gas is introduced and a chronograph is used to start timing. The timing is stopped when the value displayed on the analytical instrument to be tested drops to 10% of the nominal value of 80% span standard-gas concentration. The time taken for recording is the fall time of the analytical instrument to be tested.
The response time is tested once a day and the test is repeated for 3d. The average shall meet the requirements of 6.1.1.9.
7.1.8 Voltage stability
After the analytical instrument to be tested is running stably, 80% span standard-gas is injected under normal voltage conditions, and the reading W of the analytical instrument to be tested is recorded after stabilization. ADJUST the supply voltage of the analytical instrument to be tested to be higher than the normal voltage value by 10%, INJECT the same concentration of standard-gas, and RECORD the reading X of the analytical instrument to be tested after stabilization. ADJUST the supply voltage of the analytical instrument to be tested to be lower than the normal voltage value by 10%, INJECT the same concentration of standard-gas, and RECORD the reading Y of the analytical instrument to be tested after stabilization. CALCULATE the voltage stability V of the analytical instrument to be tested according to Formula (10), which shall meet the requirements of 6.1.1.10.
or
M3 - 80% span standard-gas measured value of the analytical instrument to be tested at an ambient temperature of t3, ppb (ppm);
M4 - 80% span standard-gas measured value of the analytical instrument to be tested at an ambient temperature of t4, ppb (ppm);
Z0 - Zero standard-gas measured value of the analytical instrument to be tested at an ambient temperature of t0, ppb (ppm);
Z1 - Zero standard-gas measured value of the analytical instrument to be tested at an ambient temperature of t1, ppb (ppm);
Z2 - Zero standard-gas measured value of the analytical instrument to be tested at an ambient temperature of t2, ppb (ppm);
Z3 - Zero standard-gas measured value of the analytical instrument to be tested at an ambient temperature of t3, ppb (ppm);
Z4 - Zero standard-gas measured value of the analytical instrument to be tested at an ambient temperature of t4, ppb (ppm);
t0 - Standard temperature value when the temperature is set to (25??1) ??C for the first time in a constant temperature environment, ??C;
t1 - Standard temperature value when the temperature is set to (35??1) ??C in a constant temperature environment, ??C;
t2 - Standard temperature value when the temperature is set to (25??1) ??C for the second time in a constant temperature environment, ??C;
t3 - Standard temperature value when the temperature is set to (15??1) ??C in a constant temperature environment, ??C;
t4 - Standard temperature value when the temperature is set to (25??1) ??C for the third time in a constant temperature environment, ??C.
7.1.11 Effect of interference components
SEE Table 2 for interference gases. After the analytical instrument to be tested is running stably, INJECT the zero standard-gas, and RECORD the reading a of the analytical instrument to be tested; RECORD the interference gas of the specified concentration, and RECORD the reading b of the analytical
instrument to be tested. Each interference gas is repeatedly tested three times according to the above operation, and the averages ???a and ???b are calculated. CALCULATE the effect IE of the interference components of the analytical instrument to be tested according to Formula (13), which shall meet the requirements of 6.1.1.13.
is equal to the difference between [NO]orig and [NO]rem, and the
concentration range shall be controlled at (20% to 60%) full scale.
c) The conversion efficiency ?? of the analytical instrument to be tested is calculated as per Formula (16), which shall meet the requirements of
6.1.1.15.
Where.
?? - Conversion efficiency of the analytical instrument to be tested, %; [NO]orig - NO measurement average of NO standard-gas when ozone
generator is not activated, ppb;
[NOX]orig - NOX measurement average of NO standard-gas when ozone
generator is not activated, ppb;
[NO]rem - NO measurement average of NO standard-gas when ozone
generator is activated, ppb;
[NOX]rem - NOX measurement average of NO standard-gas when ozone
generator is activated, ppb.
7.1.14 Unattended operation hours
The monitoring system to be tested continuously runs for 60d, during which long-term drift (???7d) test and MTBF are assessed.
(1) Long-term drift (???7d) test
After the monitoring system to be tested is running stably, INJECT the zero standard-gas, and RECORD the zero stable reading Z0 of the analytical
instrument to be tested. INJECT 80% span standard-gas, and RECORD
the stable reading M80. After the ventilation is completed, the monitoring system to be tested is continuously operated for at least 7d (no manual maintenance and calibration is allowed during the period), the above
operations are repeated, and the stable readings are recorded separately. CALCULATE the long-term zero drift LZD and long-term span drift LSD of
the analytical instrument to be tested according to Formulas (17) and (18). After the test is completed, the monitoring system to be tested can be
maintained and calibrated. Long-term drift is repeated at least 7 times. The long-term zero drift LZD and the long-term span drift LSD shall meet the state. SEE 7.1.2 for the test method. The minimum detection limit of the analytical instrument to be tested shall meet the requirements of 6.2.3. 7.2.3 Span noise
The analytical instrument to be tested is in a zero optical path measurement state. SEE 7.1.3 for the test method. The span noise of the analytical instrument to be tested shall meet the requirements of 6.2.4.
7.2.4 Indication error
The analytical instrument to be tested is in a zero optical path measurement state. SEE 7.1.4 for the test method. The indication error of the analytical instrument to be tested shall meet the requirements of 6.2.5.
7.2.5 Span precision
The analytical instrument to be tested is in a zero optical path measurement state. SEE 7.1.5 for the test method. The span precision of the analytical instrument to be tested shall meet the requirements of 6.2.6.
7.2.6 24h zero drift and 24h span drift
The analytical instrument to be tested is in a zero optical path measurement state. SEE 7.1.6 for the test method. The 24h zero drift of the analytical instrument to be tested shall meet the requirements of 6.2.7; and 24h span drift shall meet the requirements of 6.2.8.
7.2.7 Response time (rise time / fall time)
When the analytical instrument to be tested is in the zero optical path measurement state, the 80% span standard-gas at a concentration of about 80% is injected into the calibration cell. After stabilization, the calibration cell is placed in the instrument optical path and a chronograph is used to start timing. When the value displayed on the analytical instrument to be tested rises to 90% of the nominal value of the standard-gas concentration, the timing is stopped. The time taken for recording is the rise time of the analytical instrument to be tested. After the measurement reading of 80% span standard-gas is stable, the calibration cell is removed rapidly and a chronograph is used to start timing. The timing is stopped when the value displayed on the analytical instrument to be tested drops to 10% of the nominal value of 80% span standard-gas
concentration. The time taken for recording is the fall time of the analytical instrument to be tested.
The response time is tested once a day and the test is repeated for 3d. The average shall meet the requirements of 6.2.9.
7.2.8 Voltage stability
The analytical instrument to be tested is in a z...

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