Yokogawa EJX115A - Manual (Page 22)

<3. Installation>
20
IM 01C25A01-01E
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 5m 6790 3190
6 to 10m 10030 3520
SE
1 to 5m 6790 3190
6 to 10m 10030 3520
SY
1 to 5m 3190
6 to 10m 3520
HW
1 to 5m 19150 6140
6 to 10m 8290
TW
1 to 5m 9620 3620
6 to 10m 4210
UW
1 to 5m 9540 4750
6 to 10m 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 5m 2570 320
6 to 10m 4680 530
SE
1 to 5m 2570 320
6 to 10m 4680 530
SY
1 to 5m 320
6 to 10m 530
HW
1 to 5m 10220 2050
6 to 10m 3450
TW
1 to 5m 4270 570
6 to 10m 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
F0308.ai
P
Low pressure side
High
pressure
side
(+)
(–)
0
h
Figure 3.8 Example of Installation to Tank
(Caution on Installation)
3.4 Mounting the Flushing
Connection Ring
3.4.1 Mounting to Pressure Detector
Section
The flushing connection ring is mounted to the pressure
detector section as shown in Figure 3.9.
At the factory shipment, the flushing connection ring is
already assembled and attached to process detector
section.
Ring holder
Spiral gasket
F0309.ai
View from pressure
detector section
Groove for
installing
spiral gasket
Pressure-detector section
Drain/vent plug
Ring
Figure 3.9 Mounting to Pressure Detector Section
(1) Mount the ring holder on the ring and loosely tighten
the mounting screws.
(2) Place the spiral gasket in the ring groove. With the
ring correctly aligned and flush with the face of the
pressure detector, securely tighten each ring holder’s
mounting screws.
(3) Position the ring so that the drain/vent plugs are
aligned straight up and down.