Installation Manual

Chapter 2 Hardware Installation Accu-Wave
2-2 TN Technologies
Hazardous Location Approvals
The Accu-Wave is certified for use in hazardous locations as follows (approvals are
pending as of 1 March 2000):
FM
• Class I, II, III, Division 1, Groups B, C, D, E, F, G
• Class I, II, III, Division 2, Groups B, C, D, F, G
• NEMA 4X
CSA
• Class I, II, III, Division 1, Groups B, C, D, E, F, G
• Class I, II, III, Division 2, Groups B, C, D, E, F, G
• TYPE 4X
CENELEC
• EEx d IIB + H
2
• Eex n IIB + H
2
Warning: Do not locate the unit in any hazardous area other than those approved.
Follow all instructions on the installation drawings.
Do not apply power to the unit in any hazardous area unless the safety
ground is properly wired inside the unit and the cover is properly
installed. See Chapter 3 for installation wiring instructions.
Hazardous Location Installations: The cable entries must be sealed per
the Installation Layout Drawing (868502).
Non-Hazardous Location Installations: The cable entries into the
enclosure must be sealed with a compound to protect against the
passage of gas or vapors. The sealing compound should not be
affected by the surrounding atmosphere or liquids. The minimum
thickness of the sealing compound should be 5/8 in (16 mm).
Selecting a Location
Selecting a good location to mount the transmitter can ensure the accuracy and ease of
operation of your gauge.
Guidelines
Follow these guidelines when selecting a location for the Accu-Wave gauge:
1. The operating temperature range is –40
Ο
C to 70
Ο
C (–40
Ο
F to 158
Ο
F).
2. The sensor should be mounted above the smoothest portion of the process
material surface.