Yokogawa EJA110A - Manual (Page 22)

IM 01C21B01-01E 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 distance between the impulse piping connection
ports is usually 54 mm (Figure 4.2.1). By changing
the orientation of the process connector, the
dimension can be changed 51 mm or 57 mm.
᭿ The transmitter is shipped with the process connec-
tion, according to the ordering specifications. To
change the orientation of the process connections,
refer to Section 4.3.
᭿ The transmitter can be mounted on a nominal 50
mm (2-inch) pipe using the mounting bracket
supplied, as shown in Figure 4.2.2 and 4.2.3. 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}.
57 mm 54 mm 51 mm
F0401.EPS
Figure 4.2.1 Process Connector Impulse Piping Connec-
tion Distances
Horizontal pipe mounting
Vertical pipe mounting
Transmitter
mounting bolt
U-bolt nut
Mounting bracket
U-bolt nut
Mounting bracket
50 mm(2-inch) pipe
50 mm(2-inch) pipe
U-bolt
U-bolt
F0402.EPS
Transmitter
mounting bolt
Figure 4.2.2 Transmitter Mounting (Horizontal Impulse
Piping Type)