ABB 10DX3111G Instruction Manual page 27

Grounding Procedure - Case 2
For the ABB Instrumentation Magnetic Flowmeter mounted in a non-conductive or fluid insulated
pipeline, perform the following grounding procedure:
1) Obtain a pair of grounding rings. Grounding rings (with NEOPRENE gaskets) for sizes
30" through 54" meter sizes are available from ABB Instrumentation. The part numbers are
shown in Table 2-1. The grounding rings available from ABB Instrumentation resemble ori-
fice plates which have been modified to facilitate connection of a grounding lead as shown
typically in Figure 2-8. When installed, these rings are centered by the flange bolts. The
grounding ring material selected must not react with the metered fluid.
2) When installing the meter in the pipeline, bolt the grounding rings between each primary
meter flange and its adjacent pipeline flange as shown in Figure 2-9. Provide standard gas-
keting between the rings and the adjacent pipeline flange (when gasketed ring not speci-
fied).
3) Clamp the lug on the free end of each meter flange ground strap down securely on each
of the metal ground rings by means of the user provided hex head bolts and external tooth
lockwashers as shown in Figures 2-8 and 2-9.
4) Connect a ground jumper from one of the grounding ring terminals to a good earth
ground using 1/2" copper braid or #12 AWG copper wire.
2-12
10DX3111 INSTRUCTION MANUAL
TABLE 1. 304 SST GROUNDING RING
PART NUMBERS
Flange
Size
30"
36"
42"
48"
54"
Part
Number
644B009U19
644B009U20
644B009U21
644B009U22
644B009U31