Yokogawa EJA115 - Manual (Page 22)

IM 01C22K01-01E 4-1
4. INSTALLATION
4. INSTALLATION
4.1 Precautions
Before installing the transmitter, read the cautionary
notes in Section 2.4, “Selecting the Installation
Location.” For additional information on the ambient
conditions allowed at the installation location, refer to
Subsection 10.1 “Standard Specifications.”
IMPORTANT
• When welding piping during construction, take
care not to allow welding currents to flow
through the transmitter.
• Do not step on this instrument after installation.
4.2 Mounting
᭿ The transmitter can be mounted on a nominal 50
mm (2-inch) pipe using the mounting bracket
supplied, as shown in Figure 4.2.1 and 4.2.2. The
transmitter can be mounted on either a horizontal or
a vertical pipe.
᭿ When mounting the bracket on the transmitter,
tighten the (four) bolts that hold the transmitter with
a torque of approximately 39 N·m {4kgf·m}.
᭿ The transmitter is shipped with the manifold set up
as per the order specifications.
᭿ For correct flow measurement, the flow path must
always be filled with fluid; otherwise, measurement
accuracy cannot be assured.
᭿ For the vertical impulse piping type, it is recom-
mended that the manifold be mounted facing up for
liquid flow measurement; facing down for gas flow
measurement, as shown in Figure 4.2.2.
Horizontal pipe mounting
Vertical pipe mounting
Transmitter
mounting bolt
Transmitter
mounting bolt
Mounting bracket
Mounting bracket
50 mm(2-inch) pipe
50 mm(2-inch) pipe
U-bolt
U-bolt
F0401.EPS
U-bolt nut
U-bolt nut
Figure 4.2.1 Transmitter Mounting (Horizontal Impulse
Piping Type)