Yokogawa EJX118A - Manual (Page 25)

<4. Installation>
4-3
IM 01C25H01-01E
IMPORTANT
The transmitter should be installed at least 600 mm
below the high pressure (HP) process connection
to ensure a positive head pressure of fill fluid. Pay
special attention to vacuum applications.
If it can not be installed at least 600 mm below the
HP process connection, please use the equation
below:
h= × 0.102 [mm]
(P–P0)
ds
h: Vertical height between the HP process
connection and the transmitter (mm)
h≤0: Install the transmitter at least h (mm) below
the HP process connection
h>0: Install the transmitter at most h (mm) above
the HP process connection
P: Pressure in the tank (Pa abs)
P0: Minimum working pressure limit of the
transmitter (Pa abs). See below table.
[For fill fluid code A, B, C, D, E]
Wetted parts
material
code
Capillary
length
Process connection size
code
2, 8 3 4,W
SW
1 to 5 m 6790 3190
6 to 10 m 10030 3520
SE
1 to 5 m 6790 3190
6 to 10 m 10030 3520
SY
1 to 5 m 3190
6 to 10 m 3520
HW
1 to 5 m 19150 6140
6 to 10 m 8290
TW
1 to 5 m 9620 3620
6 to 10 m 4210
UW
1 to 5 m 9540 4750
6 to 10 m 6050
[For fill fluid code 1, 2, 4]
Wetted parts
material
code
Capillary
length
Process connection size
code
2, 8 3 4,W
SW
1 to 5 m 2570 320
6 to 10 m 4680 530
SE
1 to 5 m 2570 320
6 to 10 m 4680 530
SY
1 to 5 m 320
6 to 10 m 530
HW
1 to 5 m 10220 2050
6 to 10 m 3450
TW
1 to 5 m 4270 570
6 to 10 m 960
ds: Specific gravity of fill fluid (at 25°C). See below
table.
Fill fluid
code
A, 1, 4 B C, 2 D E
ds: Specific
gravity
1.07 0.94 1.09
1.90 to
1.92
1.09
F0404.ai
P
Low pressure side
High
pressure
side
(+)
(–)
0
h
Figure 4.4 Example of Installation to Tank for
Differential Pressure Transmitter
(Caution on Installation)
F0405.ai
(+)
0
(–) P
h
Figure 4.5 Example of Installation to Tank for
Gauge Pressure Transmitter
(Caution on Installation)