4.1.3
Non-zero based lower range value
Figure 4-3: Remote Capillary
ATM =
open to atmosphere
d
H
=
vertical distance from transmitter to high pressure seal
d
L
=
vertical distance from transmitter to low pressure seal
L
max
=
the maximum level of process above the high pressure seal and typically the 20
mA lower range value
L
min
=
the minimum level of process above the high pressure seal and typically the 4
mA lower range value
SG
F
=
specific gravity of fill fluid
SG
P
=
specific gravity of process fluid
Tank span
= L
max
×
SG
P
– L
min
×
SG
P
= (108 in.
×
0.75) – (0 in.
×
0.75) = 81 inH
2
O
4 mA
= L
min
×
SG
P
+ (d
H
×
SG
F
)
= (0 in.
×
0.75) + (60 in.
×
0.934) = 56.04 inH
2
O
20 mA
= L
max
×
SG
P
+ (d
H
×
SG
F
)
= (108 in.
×
0.75) + (56.04 inH
2
O) = 137.04 inH
2
O
Span
= 81 inH
2
O (137.04 to 56.04 inH
2
O)
Note
Silicone 200 has a specific gravity of 0.934.
Reference Manual
Configuration
00809-0100-4002
May 2020
Rosemount DP Level
77
Summary of Contents for Rosemount 1199
Page 4: ...4 ...
Page 8: ...Introduction Reference Manual May 2020 00809 0100 4002 8 Rosemount DP Level ...
Page 22: ...Remote Seal Systems Reference Manual May 2020 00809 0100 4002 22 Rosemount DP Level ...
Page 74: ...Installation Reference Manual May 2020 00809 0100 4002 74 Rosemount DP Level ...
Page 92: ...Fill Fluids Reference Manual May 2020 00809 0100 4002 92 Rosemount DP Level ...