704-5010-130 Datasheet, PDF (10/36 Pages) Magnetrol International, Inc. – GuidedWave Radar Level Transmitter

x
z ^Inactive
section
Active
probe rod
y
{
Inactive
probe rod
}
2.4.2 Installing a Twin Rod Probe
Before installing, make sure the:
• Probe has adequate headroom for installation and has
unobstructed entry to the bottom of the vessel.
• Process temperature, pressure, dielectric, viscosity, and
media buildup are within the probe specifications for the
installation. Refer to Specifications, Section 3.5.
Nozzles:
The 7XB Twin Rod probe may be susceptible to objects
that are in close proximity. The following rules should be
followed for proper application:
• Nozzles should be 3" (80 mm) diameter or larger.
• For nozzles < 3" (80 mm) diameter, the bottom of the
inactive section of the probe should be at least flush with
the bottom of the nozzle or extend into the vessel.
• 7XB Twin rod probe should be installed such that the
active rod is > 1" (25 mm) from metallic objects such as
pipes, ladders, etc. (a bare tank wall parallel to the probe
is acceptable).
x Make sure the process connection is at least 2" NPT or a
flanged mounting.
y Make sure that there is at least 1" (25 mm) spacing between
the active probe rod and any part of the tank (walls, still-
well, pipes, support beams, mixer blades, etc.). Minimum
stillwell diameter for a twin rod probe is 3" (80 mm).
z Carefully place the probe into the vessel. Align the gasket
on flanged installations.
{ Align the probe process connection with the threaded or
|
flanged mounting on the vessel.
| For threaded connections, tighten the hex nut of the probe
process connection. For flanged connections, tighten flange
bolts.
} Probe can be stabilized by attaching the inactive probe rod
to vessel.
NOTE: If the transmitter is to be installed at a later time, do not remove
the protective cap from the probe. Do not use sealing com-
pound or TFE tape on probe connection to transmitter. This
connection is sealed using a Viton^® O-ring.
7
57-603 Horizon Guided Wave Radar Transmitter