Emerson FloBoss 103, Инструкция по эксплуатации

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FloBoss 103/104 Instruction Manual
Revised August-2017 Power Connections 3-3
3.2.2 Installing Grounding for the FB100
The FB100 unit has two grounding screws inside the enclosure and one
grounding screw outside the enclosure. For the grounding screw
locations, refer to
Figure 3-1 .
The grounding installation method for the FloBoss 100-Series depends on
whether the pipeline has cathodic protection. On pipelines with cathodic
protection, the FB100 must be electrically isolated from the pipeline.
Electrical isolation can be accomplished by using insulating flanges
upstream and downstream on the meter run. In this case, the FloBoss 100-
Series could be flange mounted or saddle-clamp mounted directly on the
meter run and grounded with a ground rod or grid system.
On pipelines without cathodic protection, the pipeline itself may provide
an adequate earth ground and the FB100 could mount directly on the
meter run using an orifice plate. Test with a ground system tester to
make sure the pipeline to earth impedance is less than 2 ohms. If the
pipeline provides an adequate ground, you may not need to install a
separate ground rod or grid system. All grounding should terminate at a
single point.
If the pipeline to earth impedance is greater than 2 ohms, the FloBoss
installation should be electrically isolated and a ground rod or grid
grounding system installed.
A Internal grounding screws
Figure 3-1. Location of Grounding Screws
A