Quality assurance of continuous emission monitoring systems

0,33

MB

- application of BS EN 14181 and BS EN 13284-2

45

stron

6573

ID

Environment Agency

2005

rok

Contents

1. General guidance on quality assurance and calibration . 1

1.1 Introduction 1

1.2 Regulatory framework and standards for monitoring . 1

1.3 Scope and structure of BS EN 14181 . 2

1.4 Roles, responsibilities and delegation of responsibilities 4

2. Suitability of CEMs (QAL1) and MCERTS. 5

2.1 Basic rules for selecting CEMs. 5

2.2 Suitable ranges. 6

2.3 Selection procedures for CEMs and sampling systems 7

3. Calibration and validation of the CEM (QAL2) 8

3.1 QAL2 requirements . 8

3.2 Location of CEMs 8

3.3 Management system requirements 9

3.4 The functional tests 9

3.5 Calibration and validation 11

3.6 Example QAL2 calculations and variability checks . 17

3.7 Frequency of QAL2 checks 17

3.8 Performing an AST instead of a QAL2 17

3.9 Significant changes to operating conditions and fuels 17

3.10 Repeated exceedences of the calibration range . 18

4. Ongoing quality assurance during operations (QAL3) 18

4.1 QAL3 - general 18

4.2 Zero and span checks. 19

4.3 Use of control charts . 20

5. Annual surveillance test (AST) 22

5.1 Purpose of the AST 22

5.2 Functional tests 22

5.3 Parallel measurements with a SRM 22

5.4 Example AST determination 23

6. Status of this guidance 23

References . 24

Glossary. 25

Appendix 1: Example QAL2 calibration functions and variability tests . 26

A1.1 CEM measuring SO2 . 26

A1.2 CEM measuring NO 30

Appendix 2: Example Shewhart and CUSUM control charts. 35

A2.1 Shewhart chart 35

A2.2 CUSUM chart. 35

Appendix 3: Example AST determination 37