Panametrics HydroProII, User Manual

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Chapter 1. Installation
10 HygroPro
II
User's Manual
• With appropriate rated Zener Barrier/Galvanic Isolator: Required for use in Class I, Zone 0 and Class I/II/III
Division 1 hazardous areas (Figure 10).
• No Zener Barrier/Galvanic isolator: For use in Class I/II/III, Division 2 hazardous areas only (no control drawing
required).
• Non-incendive Field Wiring and Zener Barriers: For use in Class I/II/III, Division 2 hazardous areas only (Figure 11).
Figure 11: HygroPro
II
Installation Control Drawing for Non-incendive field wiring in Division 2 locations (refer to
752-607)
WARNING!
For IS (Intrinsically Safe) applications in Division 1 or Zone 0 areas, , the HygroPro
II
must
be installed with a Zener barrier (see Figure 9). Also, for installations in a hazardous
location, the blue IS cables (P/N 230-094 or 230-057) must be used.