User guide

I-E67-84-1B February,2002 3-17
GROUNDING
The customer and/or wiring contractor is
responsible to ensure that the analyzer,
associated control or test equipment, and all
exposed conductive materials are properly
grounded. Grounding procedures should be in
accordance with local regulations such as the
National Electrical Code (NEC), Canadian
Electrical Code (CEC), or equivalent.
Equipment installation must not pose a hazard,
including under fault conditions, to operation
and service personnel.
Signal wiring should be grounded at any one
point in the signal loop or may be ungrounded
(floating) if electrical noise is minimal.
The analyzer enclosure must be grounded to an
earth ground having less than 0.2 ohms of
resistance. Internal and external earth
ground terminals are provided and shown in
Figure 3-7.
Notes:
1. Because of the prevailing differences in soil
conditions and in acceptable grounding practices
throughout the world, the scope of this product
instruction does not intended to be used to describe
grounding electrode systems. The customer is responsible
to ensure a grounding electrode system is acceptable to
the local building and wiring codes.
2. Using the structural metal frame of a building as the
required equipment grounding conductor for the analyzer is
not advised.
OTHER EQUIPMENT INTERFACE
The TB84PH Advantage Series analyzer provides
two isolated current outputs that are
proportional to the process variable(s).
Since the analyzer output is isolated, each
current loop may have a maximum of one non-
isolated device within its circuit. The
maximum load on the each current loop must not
exceed the specification listed in Table 3-1,
Specifications.