12.2 Installation
Sensor wiring must follow drawing WRG‑367 or WRG‑350, see Figure 116 (page 220). See
also Figure 16 (page 43) and Figure 18 (page 45).
The FM unit installations must comply with the relevant requirements of
National Electrical Code (ANSI/NFPA 70) for Division 2 Hazardous (Classified)
Locations and all instructions in this manual. All wiring of PR‑23‑…‑FM systems must run
in a conduit.
WARNING!
Chapter 12 – PR‑23 process refractometers in potentially explosive atmosphere
219