7. MAINTENANCE ......................................................................60
7.1 CLEANING ...................................................................................... 60
7.2 BATTERY ........................................................................................ 60
8. APPENDIX ............................................................................. 64
8.1 MEASUREMENTS ......................................................................... 64
8.1.1 Definition ................................................................................ 64
8.1.2 Sampling ................................................................................ 64
8.3 AGGREGATION ............................................................................. 66
8.6 GLOSSARY .................................................................................... 70