Ametek Thermox WDG-V UOP, User Manual

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viii | Thermox WDG-V UOP IECEx/ATEX
Special Conditions for Safe Use
The WDG-V UOP is designed to be used in Category 3 hazardous locations
where explosive gases may be present. Protection against explosion is provid-
ed by purge technique. There are four rules that must always be followed:
1. Do not open the enclosure unless the power is removed from both sensor
and control unit for 90 minutes while maintaining pressurization, or the
area is demonstrated to be non-hazardous.
2. Perform purge system maintenance as described in Chapter 3 of the user
manual.
3. Use only appropriate approved conduit fittings or cable glands for cable
entry (IIC, IP40 minimum). No holes shall be left unplugged.
4. Internal temperature rises above the rated T-class. The end user must take
immediate action on the loss of pressure to reinstate purge.
HAZARDOUS LOCATION LIMITATIONS
The WDG-V UOP is a Category 3 analyzer specifically designed and certified
for use in ATEX II 3 G and IECEx hazardous locations. It can be safely oper-
ated in a location in which:
• No gases are present with a higher probability of ignition than hydrogen
(e.g., acetylene).
• The ambient temperature does not exceed 60°C.
• Voltages are 104-127 VAC or 207-253 VAC, 740 VA.
Make sure the location in which the WDG is installed meets all of the
Hazardous Location Limitation criteria for a Category 3 analyzer de-
scribed above.