Installation - Vaisala PR-23 Series User Manual

12.2 Installation
Sensor wiring must follow drawing WRG‑367 or WRG‑350, see
also Figure 16 (page 43)
WARNING!
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.
Chapter 12 – PR‑23 process refractometers in potentially explosive atmosphere
and Figure 18 (page 45).
The FM unit installations must comply with the relevant requirements of
Figure 116 (page 220). See
219