PQube 3 Installation Manual
Manual#: 851-000135
Version 3.4 – 08/11/2022 Page 20 of 47
The operator must be protected from the hazardous screw terminal blocks by a barrier. The screw
terminal blocks must be made “not accessible,” as defined in UL /IEC 61010-1 6.2, using an enclosure
or barrier that meets the rigidity requirements of UL /IEC 61010-1 8.1 and that requires a tool to
remove.
If you choose to install your PQube 3 in an enclosure, select a UL-listed enclosure that is appropriate
for the purpose. If you plan to use an enclosure of this type, you should review its mechanical
compatibility with any optional features of your PQube 3 that you plan to use: optional USB
connections, optional temperature-humidity probes, etc.
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