4Chapter 4 Maintenance······································································ 754-1 Daily Inspection ············································································754-2 Periodic Inspection (Every Six Months) ··············································764-3 Inspection after Maintenance ···························································76Chapter 5 Troubleshooting ································································· 775-1 Troubleshooting of Emitter ······························································775-2 Troubleshooting of Receiver ···························································79Chapter 6 Specifications / Dimensions ·················································· 816-1 Specifications ···············································································816-2 Options ·······················································································846-3 Dimensions··················································································866-3-1 Rear Mounting with Standard Mounting Bracket (SE9Z-SED-1) ········ 866-3-2 Side Mounting with Standard Mounting Bracket (SE9Z-SED-1) ········ 876-3-3 Rear Mounting with Dead Zoneless Mounting Bracket (SE9Z-SED-3) ·· 886-3-4 Side Mounting with Dead Zoneless Mounting Bracket (SE9Z-SED-3) ·· 896-3-5 Mounting Brackets ·································································· 90Chapter 7 Others ·············································································· 927-1 Glossary ·····················································································927-2 CE Marking Declaration of Conformity ···············································94