Rosemount 8732C, Manual

Page: 27 / 126

2-15
Installation
Grounding Grounding the flowtube is one of the most important details of flowtube
installation. Proper grounding ensures that only the voltage induced in
the flowtubes magnetic field is measured.
Model 8705
Use Table 2-5 to determine which grounding option figure to use for
proper installation.
NOTE
Consult factory for installations requiring cathodic protection or
situations where high currents or high potential exist in the process.
TABLE 2-5. Model 8705 Grounding Installation.
Grounding Options
Type of Pipe
No Grounding Options Grounding Rings Grounding Electrodes Lining Protectors
Conductive Unlined Pipe See Figure 2-14 Not Required Not Required See Figure 2-15
Conductive Lined Pipe Insufficient Grounding See Figure 2-16 See Figure 2-14 See Figure 2-15
Non-conductive Pipe Insufficient Grounding See Figure 2-18 See Figure 2-19 See Figure 2-17
Earth
Ground
02
81
A
0
2A
FIGURE 2-14. Model 8705 Grounding
for Conductive Unlined Pipe and
Grounding for Conductive Lined Pipe
with Grounding Electrodes.
Lining
Protectors
Earth
Ground
8
732
-0
281
J02
A
Lining
Protector Tab
FIGURE 2-15. Model 8705 Grounding for
Conductive Unlined Pipe with Lining
Protectors and Grounding for Conductive
Lined Pipe with Lining Protectors.