Справочник Пользователя для Emerson F-SERIES SENSOR
Sensor Installation: F-Series
19
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 core processor housing or junction box.
grounded via the piping, connect a ground wire to the internal or external grounding screw, which is located
on the core processor housing or junction box.
Improper grounding can cause measurement error. Ground the flowmeter to earth, or follow ground
network requirements for the facility.
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 at High Temperatures
Table 3 shows the pressure ratings for F-Series sensors at high temperatures.
1. Pressure rating limited by flange (for 316 sensor tubes).
2. Pressure rating limited by sensor tube for sensor type F025S, F050S, F050A, F050C.
3. Pressure rating limited by flange for sensor type F025A, F025C, F025P, F050P.
4. Pressure rating limited by flange (for C-22 Alloy sensor tubes).
2. Pressure rating limited by sensor tube for sensor type F025S, F050S, F050A, F050C.
3. Pressure rating limited by flange for sensor type F025A, F025C, F025P, F050P.
4. Pressure rating limited by flange (for C-22 Alloy sensor tubes).
Table 3
F-Series pressure ratings at high temperatures
EN-1092 flange
Pressure rating (bar)
Note
PN
Type
Facing
Description
ASTM
material
≤50°C 100°C 150°C 200°C 250°C 300°C 350°C 400°C 427°C
40
11
weld
neck
neck
B1 & D
Flange, EN
1092-1 PN40
Forms B1 & D
(316)
316
40.0
40.0
36.3
33.7
31.8
29.7
28.5
27.4
26.9
1
100
11
weld
neck
neck
B2 & D
Flange, EN
1092-1 PN100
Form B2 & D
(316)
316
100.0 100.0
90.9
84.2
79.5
74.2
71.4
68.5
67.3
1
100/
160
11
weld
neck
neck
B2
Flange, EN
1092-1
PN100/160
Form B2 (316)
316
100.0 100.0
90.9
84.2
79.5
74.2
71.4
68.5
67.3
2
160.0 160.0 145.5 134.8 127.2 118.8 114.2 109.7 107.8
3
40
32/02
lap
joint
B1
Flange, EN
1092-1 PN40
Form B1(lap
joint)
C-22 collar/
304 flange
40.0
34.4
30.8
28.0
26.0
24.1
23.0
22.0
21.4
4