Yokogawa EJA115 - Manual (Page 18)

<3. Installation>
16
IM 01C22A01-01E
3.2.1 EJA210A and EJA220A
The transmitter is mounted on a process using its
high pressure side fl ange as shown in Figure 3.5. The
customer should prepare the mating fl ange, gasket, stud
bolts and nuts.
Gasket
Stud bolt
Nut
F0305.ai
Figure 3.5 EJA210A and EJA220A Mounting
3.2.2 EJA118 and EJA438
Mount the diaphragm seals using the fl anges as shown
in Figure 3.6. The customer should prepare the mating
fl
ange, gasket, bolts and nuts.
Nut
Flange
Diaphragm
ød
Gasket
F0306.ai
Bolt
The product is
shipped with these
parts assembled.
Correctly install the diaphragm
seals on the high and low pressure
sides of the process, checking the
label on each seal.
Figure 3.6 Mounting the Diaphragm Seals
3.3 Diaphragm Seals Installation
Consideration
IMPORTANT
• When measuring the liquid level of the tank, the
minimum liquid level (zero point) must be set to a
level at least 50 mm above the center of the high
pressure side diaphragm seal (see Figure 3.2.3).
• Correctly install the diaphragm seals on the high
and low pressure sides of the process, checking
the label on each seal.
• To avoid measuring error duets temperature
difference between the two diaphragm seals,
capillary tube must be bound together. The
capillary tube must be securely fi xed to the tank
wall to prevent movement by wind or vibration.
If the capillary tube is too long, loosely coil the
excess and secure using suitable clamps.
F0307.ai
Low
pressure
side
High
pressure
side
50mm minimum
Minimum
liquid level
Install the sealed diaphragm
so that the shank positions
downward.
IMPORTANT
The transmitter should be installed as low
as possible below the position where the
high pressure side diaphragm seal is
installed.
Figure 3.7 Installing the Diaphragm Seals to a
Tank