TÜV RHEINLAND ENERGIE UND UMWELT GMBH

Transcription

1 TÜV RHEINLAND ENERGIE UND UMWELT GMBH Report on the performance testing of the measurement system LDS 6 (7MB6121-0CL0x-0xxx and 7MB6121-0DL0x-0xxx) by Siemens AG for the component Ammonia in accordance with the EURO VI standard TÜV- Cologne, 19 May TÜV Rheinland Energie und Umwelt GmbH are accredited for the following work areas: - Determination of emissions and immissions of air pollution and odour substances; - Inspection of correct installation, function and calibration of continuously running emission measuring devices including systems for data evaluation and remote monitoring of emissions; - Suitability testing of measuring systems for continuous monitoring of emissions and immissions, and of electronic systems for data evaluation and remote monitoring of emissions according to EN ISO/IEC The accreditation is valid up to DAkkS-register number: D-PL Reproduction of extracts from this test report is subject to written consent. TÜV Rheinland Energie und Umwelt GmbH D Köln, Am Grauen Stein, Tel: Fax:

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3 (7MB6121-0CL0x-0xxx and 7MB6121-0DL0x-0xxx) by Siemens AG for the component Ammonia in accordance with the EURO VI standard, Page 3 of 52 Summary TÜV Rheinland Energie und Umwelt GmbH was commissioned by Siemens AG to carry out the performance test for the LDS 6 (7MB6121-0CL0x-0xxx and 7MB6121-0DL0x-0xxx) measuring system with regard to the component ammonia in order the show the performance of the system during the measurement on engine test benches in accordance with the EURO VI standard. For the measuring device LDS 6 (7MB6121-0CL0x-0xxx and 7MB6121-0DL0x-0xxx) shall be done a performance test for the determination of NH 3 on engine test benches according to EURO VI standard. The test work shall be performed in order to follow the requirements of Regulation No. 295/2009/EC on typ-approval of motor vehicles and engines with respect to emissions from heavy duty vehicles (EURO VI) from June 18, 2009 and its implementation standard the regulation 582/2011/EC from May 25, 2011 of the Commission of the European Community. In Annex II and Appendix I of 582/2011/EC the following requirements and criteria s for measuring systems for the determination of NH 3 are mentioned. General device specifications Linearity Detection limit Accuracy Response time Short-time-drift at zero and span level The present report describes the performance and results of the required as well as additional performed tests. Since the EURO VI standards contain only limited demands on the measurement uncertainty and test performance, the performance and evaluation of the tests has been done in accordance with the standard for the certification of automated measurement systems EN

4 Page 4 of 52 (7MB6121-0CL0x-0xxx and 7MB6121-0DL0x-0xxx) by Siemens AG for the component Ammonia in accordance with the EURO VI standard, The LDS 6 measuring system uses the laser diode principle to measure NH 3. The measured ranges are indicated in the following table: Component Certification range Measured range 1 Supplementary ranges Measured range 2 Measured range 3 NH * 0 50* - - ppm *related to 1.0 m measurement path Unit The performed tests fulfil the minimum requirements of DIN EN during the performance test. Hence, the system is basically capable to measure NH 3 according to the requirements of the EURO VI standard. TÜV Rheinland Energie und Umwelt GmbH therefore suggests the usage of the LDS 6 analyzer for measurements on engine test benches according to EURO VI standard.

5 (7MB6121-0CL0x-0xxx and 7MB6121-0DL0x-0xxx) by Siemens AG for the component Ammonia in accordance with the EURO VI standard, Page 5 of 52 (7MB6121-0CL0x-0xxx and 7MB6121-0DL0x-0xxx) by Siemens AG for the component Ammonia in accordance with the EURO VI standard Instruments tested: LDS 6 (7MB6121-0CLx and 7MB6121-0DLx) Manufacturer: Siemens AG Test period: March 2015 to April 2015 Date of report: 19 May 2015 Report Number: 936/ /B Editor: In charge of technical matters: Dipl.-Ing. Martin Schneider martin.schneider@de.tuv.com Tel.: Dr. Peter Wilbring peter.wilbring@de.tuv.com Contents of the report: Report: 43 pages Annex Total 44 pages 52 pages

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7 (7MB6121-0CL0x-0xxx and 7MB6121-0DL0x-0xxx) by Siemens AG for the component Ammonia in accordance with the EURO VI standard, Page 7 of 52 Contents 1. General remarks Notification recommendation Summary report on test results Task definition Nature of the test Objective Description of the AMS tested Measuring principle AMS Scope and Setup Test programme Laboratory inspection Standard reference method Test gases and test standards Test Results b Laboratory tests b.1 [6.1 AMS for testing] b.2 [6.2 Additional data outputs] b.3 [6.3 Display of operational status signals] b.4 [6.4 Prevention or compensation for optical contamination] b.5 [6.5 Response times in laboratory tests] b.6 [6.6 Repeatability standard deviation at zero point] b.7 [6.7 Repeatability standard deviation at span point] b.8 [6.8 Lack-of-fit in laboratory test] b.9 [6.9 Zero and span drift] b.10 [6.10 Influence of sample gas temperature] b.11 [6.11 Influence of sample gas pressure] b.12 [6.12 Cross-sensitivity] Summary Bibliography Annex Manual... 52

8 Page 8 of 52 (7MB6121-0CL0x-0xxx and 7MB6121-0DL0x-0xxx) by Siemens AG for the component Ammonia in accordance with the EURO VI standard, List of Tables Table 1: Linearity of TG7 performed with Calibration Verification Kit (A5E )...19 Table 2: Tested component and certification range in laboratory test...20 Table 3: Additional measuring ranges to be tested with a reduced programme...20 Table 4: Repeatability standard deviation at zero point...27 Table 5: Repeatability standard deviation at span point...28 Table 6: Lack-of-fit test, tested range 0 15 ppm, 1.0 m path length...30 Table 7: Lack-of-fit test, tested range ppm, 1.0 m path length...32 Table 8: Results of the sample gas temperature test...36 Table 9: Influence on sample gas pressure...38 Table 10: Concentrations of interferents...39 Table 11: Cross-sensitivities, system Table 12: Cross-sensitivities, system Table 13: Repeatability standard deviation data at zero point...46 Table 14: Repeatability standard deviation data at span point...47 Table 15: Data of linearity test, range 0 15 ppm...48 Table 16: Data of linearity test, range ppm...49 Table 17: Gas temperature test data...50 Table 18: Cross-sensitivity data...51

9 (7MB6121-0CL0x-0xxx and 7MB6121-0DL0x-0xxx) by Siemens AG for the component Ammonia in accordance with the EURO VI standard, Page 9 of 52 List of Figures Figure 1: Operating principle...17 Figure 2: LDS 6 transmitter/receiver and analyzer...18 Figure 3: LDS 6 Unit...18 Figure 4: Linearity, tested range 0 15 ppm, 1.0 m path length...30 Figure 4: Linearity, tested range 0 15 ppm, 1.0 m path length...31 Figure 5: Linearity, tested range 0 15 ppm, 0.5 m path length...32 Figure 5: Linearity, tested range 0 15 ppm, 0.5 m path length...33 Figure 8: Accreditation certificate according to DIN EN ISO/IEC 17025:

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11 (7MB6121-0CL0x-0xxx and 7MB6121-0DL0x-0xxx) by Siemens AG for the component Ammonia in accordance with the EURO VI standard, Page 11 of General remarks 1.1 Notification recommendation Based on the positive individual results, the following recommendation on the application of the AMS is put forward: Measuring system: LDS 6 (7MB6121-0CL0x-0xxx and 7MB6121-0DL0x-0xxx) for NH 3 Manufacturer: Siemens AG, Karlsruhe Field of application: Exhaust measurement at engine test benches according to EURO VI standard. Measured ranges for performance test: Component Certification range Supplementary range Unit NH ppm Software version: Restrictions: none Notes: 1. Zero and Span adjustments can be done with the traceable Siemens calibration verification kit (A5E ) or with an external test bench and test gases. Test Report: TÜV Rheinland Energie und Umwelt GmbH, Cologne dated 19 May 2015

12 (7MB6121-0CL0x-0xxx and 7MB6121-0DL0x-0xxx) by Siemens AG for the component Ammonia in accordance with the EURO VI standard, Page 12 of Summary report on test results Performance criteria Results Assess ment Page Legend: General requirements Minimum requirement met Minimum requirement not met Minimum requirement not applicable + x Laboratory Test: 6.1 AMS for testing The test requires two complete systems of identical design. 6.2 Additional data outputs The AMS shall have a data output allowing an additional data display and recording device to be fitted to the AMS. 6.3 Display of operational status signals The AMS shall have a means of displaying its operating status. The AMS shall also have a means of communicating the operational status to a data handling and acquisition system. 6.4 Prevention or compensation for optical contamination An AMS that uses an optical method as the measuring principle shall have provisions for either prevention of contamination of the optical system and/or compensation for its effects. 6.5 Response times in laboratory tests The AMS shall meet the performance criteria for response time. Gaseous compounds: 200 s, O 2: 200 s, NH 3. HCl and HF: 400 s. 6.6 Repeatability standard deviation at zero The AMS shall meet the following performance criteria for repeatability standard deviation at zero point. Gaseous compounds: 2.0 %, O 2: 0.2 Vol.-%. 6.7 Repeatability standard deviation at span point The AMS shall meet the following performance criteria: The repeatability standard deviation at span point for gases except O 2 shall be 2.0 % of the upper limit of the certification range. The standard deviation at span point for O 2 shall be 0.2 Vol.-%. The tested version comprises the entire measuring system including analyser, laser transmitter unit, laser receiver unit, hyprid cable, data output, and manual. The AMS provides an additional signal output. The measurement signals set by the external devices are identical to those displayed by the AMS. Status messages are issued correctly. The AMS does not have provisions for compensation for the effects of contamination. The level of light is continuously monitored. The AMS produces a status signal if it drops below the established limits Response times of 5 seconds were determined with dry test gas in test gas cells The maximum value for the repeatability standard deviation at zero point was ppm The maximum value for the repeatability standard deviation at span point was ppm. + 28

13 (7MB6121-0CL0x-0xxx and 7MB6121-0DL0x-0xxx) by Siemens AG for the component Ammonia in accordance with the EURO VI standard, Page 13 of 52 Performance criteria Results Assessment Page 6.8 Lack-of-fit in laboratory test The AMS shall transmit a linear signal and meet the following performance criteria: The linearity deviation for gaseous compounds should be 2.0 % of the upper limit of the certification range. For O 2 it should be smaller than 0.2 Vol.-%. 6.9 Zero and span drift The manufacturer shall provide a description of the technique used by the AMS to determine and compensate the zero and span drift. The description shall not be limited to an explanation of how the AMS compensates for the effect of contamination of the optical surfaces of AMS that use optical techniques. The test laboratory shall assess that the chosen reference material applied to the AMS as an independent check of the instrument s operation is capable of monitoring any relevant change in instrument response not caused by changes in the measured component or stack gas condition. The AMS shall allow recording the zero and span drift. The manufacturer shall describe how to obtain the zero and span values. If the AMS has a means of automatic compensation for contamination and calibration and readjustment for zero and span drift, and such adjustments are not capable of bringing the AMS within normal operational conditions, then the AMS shall set a status signal. In cases where the AMS cannot measure zero values, the drift has to be measured at the lower limit of the certification range Influence of sample gas temperature The deviations of the AMS readings at the zero and span points shall not exceed the performance criteria. The Influence of ambient temperature for gaseous compounds at zero and span point should be smaller than 5.0 % of the upper limit of the certification range. For O 2 it should be smaller than 0.5 Vol.-% (as oxygen volume concentration). This applies for the following test ranges of ambient air temperature from 20 C to +50 C for assemblies installed outdoors; from +5 C to +40 C for assemblies installed indoors, where the temperatures do not fall below +5 C or rise above +40 C. The manufacturer submitting an AMS for testing may specify wider ambient temperature ranges to those above. The relative residuals do not exceed 2.0 % of the certification range It is possible to record zero and span drift. In order to determine zero and span drift, external test gas and closed gas cells are required. The system shows no 24 h short term drift behaviour. The maximum deviation is 4.0%. x

14 Page 14 of 52 (7MB6121-0CL0x-0xxx and 7MB6121-0DL0x-0xxx) by Siemens AG for the component Ammonia in accordance with the EURO VI standard, Performance criteria Results Assess ment Page 6.11 Influence of sample gas pressure The deviations of the AMS reading at the span point shall not exceed the performance criteria when the sample gas pressure changes by 3 kpa above and below atmospheric pressure. The influence of sample gas pressure shall be smaller than 2.0 % of the upper limit of the certification range. For O 2 it should be smaller than 0.2 Vol.-% (as oxygen volume concentration) Cross-sensitivity The manufacturer shall describe any known sources of interference. Tests for non-gaseous interference sources, or gases other than those listed in Annex B, shall be agreed with the test laboratory. The influence of interfering substances for gaseous compounds should be smaller than 4.0 % of the upper limit of the certification range. For O 2 it should be smaller than 0.4 Vol.-% (as oxygen volume concentration). All given input signals are calculated correctly. The maximum influence on pressure changes after correction ar 1.33 % of the certification range Deviations do not exceed 0.00 % at zero point and 2.67 % at span point. + 39

15 (7MB6121-0CL0x-0xxx and 7MB6121-0DL0x-0xxx) by Siemens AG for the component Ammonia in accordance with the EURO VI standard, Page 15 of Task definition 2.1 Nature of the test Siemens AG charged TÜV Rheinland Energie und Umwelt GmbH with a performance test for the LDS 6 measuring system with regard to the component ammonia in order the show the performance of the system during the measurement on engine test benches in accordance with the EURO VI standard. 2.2 Objective The performance test of the measuring system was carried out on the basis of the European directives regarding emission limits on vehicles. [1] Commission Regulation (EU) No 715/2007 from June 20, 2007 [2] Commission Regulation (EU) No 595/2009 from June 18, 2009 [3] Commission Regulation (EU) No 582/2011 from May 25, 2011 [2] Standard DIN EN :2008 Air quality Certification of automated measuring systems Part 3: Performance criteria and test procedures for automated measuring systems for monitoring emissions from stationary sources

16 Page 16 of 52 (7MB6121-0CL0x-0xxx and 7MB6121-0DL0x-0xxx) by Siemens AG for the component Ammonia in accordance with the EURO VI standard, 3. Description of the AMS tested The LDS 6 is a diode laser gas analyser with a measuring principle based on the specific light absorption of different gas components LDS 6 is suitable for fast and non-contact measurement of gas concentrations in process or flue gases. One or two signals from up to three measuring points are processed simultaneously by one central analyser unit. The insitu cross-duct sensors at each measuring point can be separated up to 700 m from the central unit by using fibre optic cables. 3.1 Measuring principle The operating principle of the AMS is described below. The operation of LDS 6 is based on the fact that light propagating through a gas mixture will be absorbed according to Beer-Lamberts law at certain narrow wavelength bands. This is where the gases possess molecular transitions forming narrow absorption lines. The light source in LDS 6 is a semi-conductor laser tuned to an appropriate absorption line for the gas to be measured. The laser light is spectrally much narrower than the gas absorption line and this together with a proper choice of absorption line, will result in low interference from other gases. The light is modulated, both in frequency and in amplitude, to facilitate detection on the second harmonic signal as well as elimination of contribution from spectrally broad absorption originating from dust, smoke, etc. LDS 6 is connected to the measuring points by fiber optics. The laser light is guided by a single-mode fiber from the central unit to the transmitter unit of the in-situ sensor. The sensor consists of a transmitter and a receiver; the distance between them defines the measurement path. In the receiver box, the light is focused onto a suitable detector. The detector signal is then converted into an optical signal and transmitted via a second optical fiber to the central unit, where the concentration of the gas component is determined from the detected absorption signal. LDS 6 usually measured a single gas component by means of the absorption capacity of a single fully resolved molecular absorption line. The absorption results from conversion of the radiation energy of the laser light into the internal energy of the molecule. By using an internal reference cell normally filled with the gas measured, the stability of the spectrometer is permanently checked in a reference channel. By doing so, the continuous validity of the calibration is ensured without the need to carry out external recalibration using bottled test gases or reference gas cells.

17 (7MB6121-0CL0x-0xxx and 7MB6121-0DL0x-0xxx) by Siemens AG for the component Ammonia in accordance with the EURO VI standard, Page 17 of 52 Figure 1: Operating principle 3.2 AMS Scope and Setup The gas analyzer LDS 6 consist of a central unit and up to three in-situ sensors. The connection between the central unit and the sensors is established by a so-called hybrid cable, which contains optical fibers and copper wires. An additional cable connects the transmitter and receiver parts of the cross-duct sensor. The central unit is housed in 19 rack with 4 holders for mounting in a hinged frame in racks with or without telescopic rails. The LDS 6 operates as an independent unit powered by a V AC main power supply. From the laser module in the analyser, the light is led via an optical fibre to the emitter. The signal from the detector inside the receiver is converted into a light signal and led via an optical communication fibre back to the analyser. The data sampling system is capable of scanning over an absorption line with a high repetition, thereby enabling fast response time and low detection limits. Fine tuning and scanning are done by controlling the driving electrical power. In the first step of the evaluation the absorption spectrum is corrected for the small spectral variations in the laser output. The laser spectrum is recorded under circumstances where no absorption for the gases in measurement is present. The laser spectrum can thus be treated as a reference spectrum. The result is now a differential absorption spectrum, which contains fingerprints from all gases in the atmosphere between the emitter and the receiver. A mathematical absorption spectrum made of the pre-recorded cross-section spectra is developed and used to extract the concentration information from the spectrum.

18 Page 18 of 52 (7MB6121-0CL0x-0xxx and 7MB6121-0DL0x-0xxx) by Siemens AG for the component Ammonia in accordance with the EURO VI standard, Finally, the result is corrected arithmetically for the operator-defined span and offset factors and also for current pressure and temperature. In the used setup the result is then transferred to a computer and stored on the disk memory, together with standard deviation, light level, date and time. The parameter light level is taken from a monitoring signal, which controls the detector amplification. A low light intensity is compensated by a high amplification, and the light level is then set to a low value, and vice versa. Figure 2: LDS 6 transmitter/receiver and analyzer Figure 3: LDS 6 Unit

19 (7MB6121-0CL0x-0xxx and 7MB6121-0DL0x-0xxx) by Siemens AG for the component Ammonia in accordance with the EURO VI standard, Page 19 of Calibration Verification Kit For the on-site verification of the actual calibration, a Calibration Kit (Siemens item no.: A5E ) is available. This Kit can be used for an on-site check of the LDS 6 adjustment as well as linearity checks on-site. Figure 4: Calibration Verification Kit (A5E ) Table 1: Linearity of TG7 performed with Calibration Verification Kit (A5E ) Calibration Kit Measurement Setpoint TG 7 Deviation in [mg/m³] [mg/m³] % of CR 0,000 0,000 0,00 1,177 1,171-0,04 2,246 2,219-0,18 3,383 3,351-0,21 4,407 4,349-0,39 5,606 5,481-0,83 6,584 6,493-0,61 7,650 7,528-0,81 8,620 8,580-0,27 10,474 10,280-1,29 0,000 0,000 0,00

20 Page 20 of 52 (7MB6121-0CL0x-0xxx and 7MB6121-0DL0x-0xxx) by Siemens AG for the component Ammonia in accordance with the EURO VI standard, 4. Test programme 4.1 Laboratory inspection The laboratory test was performed with two complete system of the LDS 6 type (7MB6121-0CL0x-0xxx and 7MB6121-0DL0x-0xxx) with the serial numbers N1TG6_E6_CL und N1TG7_E6_CL. In accordance with the standard, the following test programme was established for the laboratory inspection. Test of the complete measuring system, Test of additional data outputs, Test of displays of operational status signals, Test of prevention of optical contamination Test of response time, Test of repeatability standard deviation at zero point, Test of repeatability standard deviation at span point, Test of linearity (Lack-of-fit), Test of zero and span drift, Test of the influence of sample gas temperature, Test of the influence of sample gas pressure Test of cross-sensitivities. The following two tables show the measured components and their certification ranges for which this test programme or a reduced programme was carried out. Table 2: Tested component and certification range in laboratory test Component Certification range Unit NH ppm Table 3: Additional measuring ranges to be tested with a reduced programme Component Additional range Unit NH ppm

21 (7MB6121-0CL0x-0xxx and 7MB6121-0DL0x-0xxx) by Siemens AG for the component Ammonia in accordance with the EURO VI standard, Page 21 of Standard reference method 5.4 Test gases and test standards Test gases used during the test: (The test gases mentioned below were used during the entire test and, if necessary, diluted with the help of a mass flow control station.) Zero gas: Nitrogen 5.0 Test gas NH 3 in N 2 : 33,8 ppm Number of test gas cylinder: Manufacturer / date of manufacture: Linde, 30 January 2015 Stability guarantee / certified: 1 year Test gas NH 3 in N2: 505,2 ppm Number of test gas cylinder: Manufacturer / date of manufacture: Linde, 29 January 2015 Stability guarantee / certified: 1 year All materials and measuring systems used for the tests complied with the TEU quality management according to EN at the time of testing.

22 Page 22 of 52 (7MB6121-0CL0x-0xxx and 7MB6121-0DL0x-0xxx) by Siemens AG for the component Ammonia in accordance with the EURO VI standard, 6. Test Results 6b Laboratory tests 6b.1 [6.1 AMS for testing] Equipment All AMS submitted for testing shall be complete. These specifications do not apply to the individual parts of an AMS. The test report shall be issued for a specified AMS with all its parts listed. An AMS that uses extractive sampling systems shall have appropriate provisions for filtering solids, avoiding chemical reactions within the sampling system, entrainment effects and effective control of water condensate. Measuring systems with different options for the sampling line length shall be tested with an appropriate sampling line length agreed between the test laboratory and the manufacturer. The length shall be quoted in the test report. The test laboratory shall describe in the test report the type of sampling system. The test was carried out with two complete LDS 6 measuring system (TG6 and TG7). Chapter 3.2 describes the sampling facility in detail. Software version was implemented in the measuring device. Performance of the test The AMS and the manual was checked for completeness. Pictures of the system were taken before and during the test. Evaluation The system was complete and comprised the following parts: Central Unit (LDS 6) Laser transmitter unit (CD 6) Laser receiver unit (CD 6) Hyprid cable Manual Assessment The tested version comprises the entire measuring system including analyser, laser transmitter unit, laser receiver unit, hyprid cable, data output, and manual. Detailed presentation of test results Not required for this point. Pictures of the tested system are shown in chapter 3.

23 (7MB6121-0CL0x-0xxx and 7MB6121-0DL0x-0xxx) by Siemens AG for the component Ammonia in accordance with the EURO VI standard, Page 23 of 52 6b.2 [6.2 Additional data outputs] Equipment The AMS shall have a data output allowing an additional data display and recording device to be fitted to the AMS, i.e. one for the data acquisition system and one supplementary output. The test laboratory shall then check that the measurement signals displayed on the additional data output are the same results as those on the AMS. The test laboratory shall assess and describe in the test report the mechanism of the additional data output. Tested AMS, zero- and test gas, Performance of the test A network connection was used with the outputs of the measuring system for test purposes. The test was performed by comparing the recorded measurement signal to the AMS signal and to the nominal value of the reference materials. Evaluation The measured values displayed at the different outputs of the AMS are identical. Connection of further data handling and acquisition devices is possible. Assessment The AMS provides an additional signal output. The measurement signals set by the external devices are identical to those displayed by the AMS. Thus, the minimum requirement is met. Detailed presentation of test results Not applicable in this instance

24 Page 24 of 52 (7MB6121-0CL0x-0xxx and 7MB6121-0DL0x-0xxx) by Siemens AG for the component Ammonia in accordance with the EURO VI standard, 6b.3 [6.3 Display of operational status signals] Equipment The AMS shall have a means of displaying its operating status. The AMS shall also have a means of communicating the operational status to a data handling and acquisition system. The existing status signals were tested. Performance of the test Operational states such as maintenance and malfunction were simulated by intervening in the measuring system. It was thus verified whether the AMS correctly displays the various status signals. Evaluation Status signals are correctly issued via an adequate relay contact. Assessment Status messages are issued correctly. Thus, the minimum requirement is met. Detailed presentation of test results Not applicable in this instance

25 (7MB6121-0CL0x-0xxx and 7MB6121-0DL0x-0xxx) by Siemens AG for the component Ammonia in accordance with the EURO VI standard, Page 25 of 52 6b.4 [6.4 Prevention or compensation for optical contamination] Equipment An AMS that uses an optical method as the measuring principle shall have provisions for either prevention of contamination of the optical system and/or compensation for its effects. For instruments with in-built contamination compensation, the absorption of the optical filter may be specified by the manufacturer to be larger than 10% in order for the compensation capability of the instrument to be more fully tested. The influence of optical boundary surface soiling on the measurement signal shall be determined while taking into account the physical relationships, and quantified wherever possible through measurements. The process employed inside the AMS for monitoring the effect of contamination shall be described by the AMS manufacturer in a logical manner. This function shall be operable with the AMS installed and operational. The AMS shall also display when the function is working. No equipment was necessary to test this performance criterion. Performance of the test The measuring system does not have provisions for compensation for the effects of contamination. The optical windows of the emitter and receiver units are protected against contamination by means of a purge air system. The level of received light is also measured and monitored during every measurement. Evaluation The AMS does not have provisions for compensation for the effects of contamination. The transmission of light is continuously monitored as an indicator for optical contamination. Assessment The AMS does not have provisions for compensation for the effects of contamination. The level of light is continuously monitored. The AMS produces a status signal if it drops below the established limits. Thus, the minimum requirement is met. Detailed presentation of test results Not applicable in this instance

26 Page 26 of 52 (7MB6121-0CL0x-0xxx and 7MB6121-0DL0x-0xxx) by Siemens AG for the component Ammonia in accordance with the EURO VI standard, 6b.5 [6.5 Response times in laboratory tests] Equipment The AMS shall meet the performance criteria for response time. The response time shall not exceed 200s. Tested AMS, zero and test gases from gas cylinders and an appropriate test gas cell to ensure a sudden change between zero- and test gas Performance of the test The AMS tested is a single-component measuring system. The measurements are carried out sequentially. The response time for this method of measurement is, unlike conventional monitors, not determined by gas lines and damping settings. The response time of the AMS is significantly determined by the time of measurement. The measurement during the performance test was 5 seconds. This results also in a total measurement cycle of 5 seconds. Evaluation The maximum response time was 5 seconds for the component NH 3. Assessment Response times of 5 seconds were determined with dry test gas in test gas cells. Detailed presentation of test results Not applicable in this instance

27 (7MB6121-0CL0x-0xxx and 7MB6121-0DL0x-0xxx) by Siemens AG for the component Ammonia in accordance with the EURO VI standard, Page 27 of 52 6b.6 [6.6 Repeatability standard deviation at zero point] Equipment The AMS shall meet the following performance criteria for repeatability standard deviation at zero point. The repeatability standard deviation at zero point shall be 2.0 % of the upper limit of the certification range. The detection limit is two times the repeatability standard deviation at zero. The quantification limit is four times the repeatability standard deviation at zero. Measured system, zero gas, data logger Performance of the test The measured signals of the AMS at zero point were determined after application of the reference material by waiting the time equivalent to four times the response time and then recording 20 consecutive individual readings at intervals equivalent to the response time. The value is to be averaged for the response time. Evaluation With the help of the measured signals determined during the test, the repeatability standard deviation at zero was calculated with the following equation. where: 2 s ( ) r is the repeatability standard deviation; xi x sr = x i is the ith measured signal; n 1 x is the average of the measured signals xi; n is the number of measurements, n = 20. Assessment The maximum value for the repeatability standard deviation at zero point was ppm. Table 4: Repeatability standard deviation at zero point AMS: Component: LDS 6 in the laboratory NH3 (certification range = 0-15 ppm) Zero point System 1 System 2 Number of readings Mean value ppm Standard deviation s r ppm Requirement s r ppm Standard deviation s r % CR Requirement s r % CR 2.0 Detection limit ppm Quantification limit ppm Detailed presentation of test results Results on the determination of repeatability standard deviation are available in table 13 in the annex.

28 Page 28 of 52 (7MB6121-0CL0x-0xxx and 7MB6121-0DL0x-0xxx) by Siemens AG for the component Ammonia in accordance with the EURO VI standard, 6b.7 [6.7 Repeatability standard deviation at span point] Equipment The AMS shall meet the following performance criteria for repeatability standard deviation at span point. The repeatability standard deviation at span point for gases shall be 2.0% of the upper limit of the certification range. Measured AMS, test gas and data logger Performance of the test The AMS measured signals at span point were determined after applying reference material and a waiting period corresponding to four times the response time by means of 20 successive separate readings at intervals equivalent to a single response time of the device reading. The value is to be averaged for the response time. Evaluation Repeatability standard deviation was calculated on the basis of measured values using the following equation, sr ( x x) = n 1 Assessment i 2 where: s r is the repeatability standard deviation; x i is the ith measurement; x is the average of the 20 measurements x i ; n is the number of measurements, n = 20. The maximum value for the repeatability standard deviation at span point was ppm. This fulfils the minimum requirement. Table 5: Device: Component: Repeatability standard deviation at span point LDS 6 in the laboratory NH3 (certification range = 0-15 ppm) Span point System 1 System 2 Number of readings Mean value ppm Standard deviation s r ppm Requirement s r ppm Standard deviation s r % CR Requirement s r % CR 2.0 Detailed presentation of test results Results on the determination of repeatability standard deviation at span point are detailed in table in the annex.

29 (7MB6121-0CL0x-0xxx and 7MB6121-0DL0x-0xxx) by Siemens AG for the component Ammonia in accordance with the EURO VI standard, Page 29 of 52 6b.8 [6.8 Lack-of-fit in laboratory test] Equipment The AMS shall have a linear output and shall meet the following performance criteria for lack of fit. The linearity deviation for gaseous compounds shall not exceed 2.0 % of the upper limit of the certification range. The linearity of the response of the AMS shall be checked using at least seven different reference materials, including a zero concentration. The test was performed using the means of adjustment mentioned before (zero gas/test gas), a closed measurement cell, a mass flow controller and a data logger. Performance of the test The required reference material was prepared by means of a calibrated dilution system. Test gas concentrations were selected in such a way that the measured values were equally spaced out over the certification range. Reference materials were applied in the following order (approximate concentrations of the upper limits of the certification range): 0% 70% 40% 0% 60% 10% 30% 90% 0%. By applying reference materials in this order, hysteresis effects were avoided. The AMS measurement signals were determined after each change in concentration and a waiting period corresponding to four times the response time by means of three successive separate readings at intervals equivalent to a single response time of the device reading. The value is averaged for the response time. The lack of fit has been determined in 2 different ranges and path length. Evaluation The relationship between the values of the AMS and the reference material values was determined in accordance with annex C of DIN EN To this end, a regression calculation was performed with AMS values (x-values) and the reference material values (c-values). Subsequently, the average of AMS readings at each concentration level as well as the deviation (residual) of this average to the regression line was calculated. Assessment The relative residuals do not exceed 2.0 % of the certification range. This fulfils the minimum requirement.

30 Page 30 of 52 (7MB6121-0CL0x-0xxx and 7MB6121-0DL0x-0xxx) by Siemens AG for the component Ammonia in accordance with the EURO VI standard, Table 6: AMS: Component: Lack-of-fit test, tested range 0 15 ppm, 1.0 m path length LDS6 in the laboratory NH 3 (Certification range = 0-15 ppm) System 1 System 2 Nominal value Reading Regression d c,rel Nominal value Reading Regression d c,rel ppm ppm ppm % ppm ppm ppm % Maximum value d c,rel Nominal value [ppm] Linearity test in the laboratory, System 1, NH Residuals [%] Reading AMS [ppm] Readings Max. allowed deviation Residuals Figure 5: Linearity, tested range 0 15 ppm, 1.0 m path length

31 (7MB6121-0CL0x-0xxx and 7MB6121-0DL0x-0xxx) by Siemens AG for the component Ammonia in accordance with the EURO VI standard, Page 31 of 52 Nominal value [ppm] Linearity test in the laboratory, System 2, NH Residuals [%] Reading AMS [ppm] Readings Max. allowed deviation Residuals Figure 6: Linearity, tested range 0 15 ppm, 1.0 m path length

32 Page 32 of 52 (7MB6121-0CL0x-0xxx and 7MB6121-0DL0x-0xxx) by Siemens AG for the component Ammonia in accordance with the EURO VI standard, Table 7: AMS: Component: Lack-of-fit test, tested range ppm, 1.0 m path length LDS6 in the laboratory NH 3 (Certification range = ppm) System 1 System 2 Nominal value Reading Regression d c,rel Nominal value Reading Regression d c,rel ppm ppm ppm % ppm ppm ppm % Maximum value d c,rel Nominal value [ppm] Linearity test in the laboratory, System 1, NH Residuals [%] Reading AMS [ppm] Readings Max. allowed deviation Residuals Figure 7: Linearity, tested range ppm, 1.0 m path length

33 (7MB6121-0CL0x-0xxx and 7MB6121-0DL0x-0xxx) by Siemens AG for the component Ammonia in accordance with the EURO VI standard, Page 33 of 52 Nominal value [ppm] Linearity test in the laboratory, System 2, NH Residuals [%] Reading AMS [ppm] Readings Max. allowed deviation Residuals Figure 8: Linearity, tested range ppm, 1.0 m path length Detailed presentation of test results Table 15 to table 16 in the annex list the single results of the lack-of-fit test.

34 Page 34 of 52 (7MB6121-0CL0x-0xxx and 7MB6121-0DL0x-0xxx) by Siemens AG for the component Ammonia in accordance with the EURO VI standard, 6b.9 [6.9 Zero and span drift] Equipment The manufacturer shall provide a description of the technique used by the AMS to determine and compensate the zero and span drift. The description shall not be limited to an explanation of how the AMS compensates for the effect of contamination of the optical surfaces of AMS that use optical techniques. The test laboratory shall assess that the chosen reference material applied to the AMS as an independent check of the instrument s operation is capable of monitoring any relevant change in instrument response not caused by changes in the measured component or stack gas condition. The AMS shall allow recording the zero and span drift. The manufacturer shall describe how to obtain the zero and span values. If the AMS has a means of automatic compensation for contamination and calibration and re-adjustment for zero and span drift, and such adjustments are not capable of bringing the AMS within normal operational conditions, then the AMS shall set a status signal. In cases where the AMS cannot measure zero values, the drift has to be measured at the lower limit of the certification range. AMS to be tested, zero and sample gas as well as a data logger Performance of the test The possibility to determine zero and span drift was inspected. Evaluation In order to determine zero and span drift, zero and sample gas have to be admitted at regular intervals. The measuring system does not have a mechanism to compensate for zero and span drift. The received light level is analysed and displayed for each measurement. If the light level falls below a specified level (e.g. due to contamination), a status signal is set. Furthermore during the laboratory test no 24 h short term drift effect at zero and span could be determined. Assessment It is possible to record zero and span drift. In order to determine zero and span drift, external test gas and closed gas cells are required. The system shows no 24 h short term drift behaviour. This fulfils the minimum requirement. Detailed presentation of test results Not applicable in this instance

35 (7MB6121-0CL0x-0xxx and 7MB6121-0DL0x-0xxx) by Siemens AG for the component Ammonia in accordance with the EURO VI standard, Page 35 of 52 6b.10 [6.10 Influence of sample gas temperature] The deviations of the AMS readings at the zero and span points shall not exceed the performance criteria. The Influence of the test gas temperature for gaseous compounds at zero and span point shall not exceed 5.0 % of the upper limit of the certification range. Equipment The test was performed using the means of adjustment mentioned before (zero gas/test gas) and a thermo ofen, which can control the gas temperature on a 1 m path with a stable temperature up to +600 C. Performance of the test In the thermo ofen, the test gas was exposed to the following temperatures: 25 C 100 C 200 C 300 C 400 C. For each temperature step, zero and reference gas were applied for the component NH 3. After a waiting period equivalent to four times the response time, measured signals are determined by three consecutive individual readings at intervals equivalent to one single response time. In each case, the values were averaged out over a single response time. An equilibration period of at least 1 h elapsed between the individual temperature steps. Deviations were determined by comparing measured signals at each temperature step with the average of measured signals at 25 C. The AMS was operating during the entire duration of the test. Evaluation Deviations of measured signals at each temperature step were determined. The maximum value of the sensitivity coefficient was determined with the following equation: b t = ( xi xi 1 ) ( T T ) i i 1 where: b xi xi 1 Ti Ti 1 is the sensitivity coefficient of ambient temperature; is the average reading at temperature Ti; is the average reading at temperature Ti 1; is the current temperature in the test cycle; is the previous temperature in the test cycle. Assessment Results of the temperature test are detailed in table 8. There the mean values of each series of measurement of the test programme at each temperature are illustrated. The maximum deviation is 4.0%. This fulfils the minimum requirement.

36 Page 36 of 52 Table 8: AMS: Component: (7MB6121-0CL0x-0xxx and 7MB6121-0DL0x-0xxx) by Siemens AG for the component Ammonia in accordance with the EURO VI standard, Results of the sample gas temperature test LDS6 in the laboratory NH3 (certification range = 0-15 ppm) Zero point System 1 Span point Temperature Reading Deviation b t Reading Deviation b t C ppm % ( 20 ) ppm % ( 20 ) Maximum value x i,adj x imax x imin u Zero point System 2 Span point Temperature Reading Deviation b t Reading Deviation b t C ppm % ( 20 ) ppm % ( 20 ) Maximum value x i,adj x imax x imin u Detailed presentation of test results Individual values of the temperature test are given in table 17 of the annex.

37 (7MB6121-0CL0x-0xxx and 7MB6121-0DL0x-0xxx) by Siemens AG for the component Ammonia in accordance with the EURO VI standard, Page 37 of 52 6b.11 [6.11 Influence of sample gas pressure] Equipment The deviations of the AMS reading at the span point shall not exceed the performance criteria when the sample gas pressure changes by 3 kpa above and below atmospheric pressure. The influence of sample gas pressure shall be smaller than 2.0 % of the upper limit of the certification range. This typically applies to in-situ AMS, but not to extractive AMS, since the sample gas is conditioned and typically not subject to significant variations of temperature and pressure once within the analyser. AMS to be tested, zero and sample gases and a data logger. Performance of the test With in-situ measuring devices the measurement is performed under operating conditions, thus requiring a correction or compensation (scaling) of pressure and temperature influences (as well as moisture). Generally, this scaling/compensation is performed externally together with the moisture correction in the emission evaluation system. Also during the comparison measurements performed during the field test the reliability of the temperature and pressure correction function was tested. Evaluation The Siemens LDS 6 measuring system is an in-situ AMS. The AMS is able to read signals from external pressure and temperature sensors, thus enabling a correction of the measured concentration values. It was checked during this test whether the AMS calculates these values properly. This was made by applying different pressures to the test gas cell. Assessment All given input signals are calculated correctly. The maximum influence on pressure changes after correction ar 1.33 % of the certification range. This fulfils the minimum requirement.

38 Page 38 of 52 Table 9: Influence on sample gas pressure (7MB6121-0CL0x-0xxx and 7MB6121-0DL0x-0xxx) by Siemens AG for the component Ammonia in accordance with the EURO VI standard, AMS: Component: LDS 6 in the laboratory NH 3 (Certification range = 0-15 ppm) System 1 System 2 Pressure Reading Deviation b f Reading Deviation b f kpa ppm %CR ppm %CR Maximum value x i,adj x imax x imin u Detailed presentation of test results Not applicable in this instance

39 (7MB6121-0CL0x-0xxx and 7MB6121-0DL0x-0xxx) by Siemens AG for the component Ammonia in accordance with the EURO VI standard, Page 39 of 52 6b.12 [6.12 Cross-sensitivity] Equipment The manufacturer shall describe any known sources of interference. Tests for nongaseous interferences sources, or gases other than those listed in Annex B of DIN EN shall be agreed with the test laboratory. The AMS shall meet the following performance criteria at the zero and span point for cross-sensitivity. The sum of negative and positive cross-sensitivities should be smaller than 4.0 % of the upper limit of the certification range for all components. The test was performed using the means of adjustment mentioned before (zero gas/sample gas), mass flow controller and test gas mixtures for the determination of cross-sensitivity. Performance of the test Initially, a test gas mixture without interfering substances was admitted before adding interfering substances. Measured signals of the AMS were determined for each sample gas after waiting the time equivalent to four times the response time by means of three consecutive separate readings at an interval equivalent to a single response time. The measured signals retrieved form test gases with interfering components were compared to those without interfering substances. For the test of cross-sensitivities, the components indicated in Table 10 were fed. Table 10: Concentrations of interferents Component Value Unit O 2 21 Vol.-% H 2 O 30 Vol.-% CO 2 15 Vol.-% CO 500 ppm Benzene 10 ppm NO 500 ppm NO ppm

40 Page 40 of 52 (7MB6121-0CL0x-0xxx and 7MB6121-0DL0x-0xxx) by Siemens AG for the component Ammonia in accordance with the EURO VI standard, Evaluation: Deviations of measured signals at the admission of various cross-sensitivity components were determined. All positive deviations exceeding 0.5 % of the sample gas concentration and all negative deviations below -0.5 % of the sample gas concentration at zero point and span point were balanced out against each other. Deviations of the measured signals on feeding individual cross-sensitivity components were determined. Assessment Deviations do not exceed 0.00 % at zero point and 2.67 % at span point. This fulfils the minimum requirement. Table 11: Cross-sensitivities, system 1 AMS: Component: LDS6 in the laboratory NH3 (Certification range = 0-15 ppm) AMS 1 Zero point Span point Interferent Nominal value Reading Nominal value Reading ppm ppm %TG %CR ppm ppm %TG %CR O 2 21 Vol.-% H 2 O 30 Vol.-% CO 300 mg/m³ CO 2 15 Vol.-% Benzene 50 mg/m³ NO 300 mg/m³ NO 2 30 mg/m³ Sum of positive deviations Sum of negative deviations Any deviation <= 0.5% of the test gas concentration at span point remains unconsidered.

41 (7MB6121-0CL0x-0xxx and 7MB6121-0DL0x-0xxx) by Siemens AG for the component Ammonia in accordance with the EURO VI standard, Page 41 of 52 Table 12: Cross-sensitivities, system 2 AMS: Component: LDS6 in the laboratory NH3 (Certification range = 0-15 ppm) AMS 2 Zero point Span point Interferent Nominal value Reading Nominal value Reading ppm ppm %TG %CR ppm ppm %TG %CR O 2 21 Vol.-% H 2 O 30 Vol.-% CO 300 mg/m³ CO 2 15 Vol.-% Benzene 50 mg/m³ NO 300 mg/m³ NO 2 30 mg/m³ Sum of positive deviations Sum of negative deviations Any deviation <= 0.5% of the test gas concentration at span point remains unconsidered. Detailed presentation of test results Deviations at zero point and span point influenced by different interfering substances are illustrated in table 18.

42 Page 42 of 52 (7MB6121-0CL0x-0xxx and 7MB6121-0DL0x-0xxx) by Siemens AG for the component Ammonia in accordance with the EURO VI standard, 7. Summary The results of all conducted tests are stated in the previous chapters of this report. As shown, all obtained test results show a good performance of the measurement system LDS 6 (7MB6121-0CL0x-0xxx and 7MB6121-0DL0x-0xxx). It is shown that the measurement system LDS 6 (7MB6121-0CL0x-0xxx and 7MB6121-0DL0x-0xxx) is able to operate according to the requirements of Regulation No. 295/2009/EC on typ-approval of motor vehicles and engines with respect to emissions from heavy duty vehicles (EURO VI) from June 18, 2009 and its implementation standard the regulation 582/2011/EC from May 25, 2011 of the Commission of the European Community. TÜV Rheinland Energie und Umwelt GmbH therefore suggests the application of the LDS 6 (7MB6121-0CLx and 7MB6121-0DLx) analyser for measurements on engine test benches according to EURO VI standard. Cologne, 19 May 2015 Dipl.-Ing. Martin Schneider Dipl.-Ing. Guido Baum

43 (7MB6121-0CL0x-0xxx and 7MB6121-0DL0x-0xxx) by Siemens AG for the component Ammonia in accordance with the EURO VI standard, Page 43 of Bibliography [1] Commission Regulation (EU) No 715/2007 from June 20, 2007 [2] Commission Regulation (EU) No 595/2009 from June 18, 2009 [3] Commission Regulation (EU) No 582/2011 from May 25, 2011 [4] Standard DIN EN :2008 Air quality Certification of automated measuring systems Part 3: Performance criteria and test procedures for automated measuring systems for monitoring emissions from stationary sources

44 Page 44 of 52 (7MB6121-0CL0x-0xxx and 7MB6121-0DL0x-0xxx) by Siemens AG for the component Ammonia in accordance with the EURO VI standard, 9. Annex Figure 9: Accreditation certificate according to DIN EN ISO/IEC 17025:2005