Grounding

Step 5 Grounding

The sensor can be grounded via the piping if the joints in the pipeline are ground-bonded. If the sensor is not grounded via the piping, connect a ground wire to the internal or external grounding screw, which is located on the transmitter, core processor, or junction box.

Improper grounding can cause measurement error. Ground the flowmeter to earth, or follow ground network requirements for the facility.

If national standards are not in effect, follow these guidelines to ground the sensor:

Use copper wire, 14 AWG (2,0 mm²) or larger wire size for grounding.

Keep all ground leads as short as possible, less than 1 ohm impedance.

Connect ground leads directly to earth, or follow plant standards.

Pressure Ratings

Table 4 shows the pressure ratings for ELITE sensors.

Table 4 ELITE pressure ratings

 

 

EN-1092 flange

 

 

 

 

Pressure rating (bar)

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Note

PN

Type

Facing

Description

ASTM

50°C

100°C

150°C

200°C

250°C

300°C

350°C

400°C

427°C

 

 

 

 

material

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

40

11

B1

Flange, EN

304

40.0

34.4

30.8

 

28.0

26.0

24.1

 

23.0

22.0

21.4

1

 

weld

 

1092-1 PN40

 

 

 

 

 

 

 

 

 

 

 

 

 

 

neck

 

Form B1 (304)

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

40

11

B2 & D

Flange, EN

316

40.0

40.0

36.3

 

33.7

31.8

29.7

 

28.5

27.4

26.9

2

 

weld

 

1092-1 PN40

 

 

 

 

 

 

 

 

 

 

 

 

 

 

neck

 

Form B2 & D

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

(316)

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

100

11

B2 & D

Flange, EN

316

100.0

100.0

90.9

 

84.2

79.5

74.2

 

71.4

68.5

67.3

2

 

weld

 

1092-1 PN100

 

 

 

 

 

 

 

 

 

 

 

 

 

 

neck

 

Form B2 & D

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

(316)

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

40

32/02

B1

Flange, EN

C-22 collar/

40.0

34.4

30.8

 

28.0

26.0

24.1

 

23.0

22.0

21.4

3

 

lap

 

1092-1 PN40

304 flange

 

 

 

 

 

 

 

 

 

 

 

 

 

joint

 

Form B1(lap

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

joint)

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

1.Pressure rating limited by flange (for 304 sensor tubes).

2.Pressure rating limited by flange (for 316 sensor tubes).

3.Pressure rating limited by flange (for C-22 Alloy sensor tubes).

20

Micro Motion® ELITE® Sensors

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Emerson CMF200A installation manual Grounding, Pressure Ratings, Elite pressure ratings