Emerson Rosemount 3100 Series Reference Manual

11
Reference Manual
00809-0100-4840, Rev CB
Section 3: Installation
February 2015
Installation
 Avoid mounting the transmitter directly over any inlet stream.
 Liquid surface turbulence is not normally a problem unless it is excessive. The effects of
turbulence are minor, but excessive turbulence can be dealt with by fine-tuning the
transmitter on site, if necessary.
3.3.3 Consider in-tank effects
 Stirrers or agitators can cause a vortex. Mount the transmitter off-center of any vortex
to maximize the return echo.
 If stirrer blades become uncovered, they create echoes as they pass through the
ultrasonic beam. The transmitter can learn to ignore these false echoes (see page 69 or
page 122).
 In tanks with rounded or conical bottoms, mount the transmitter off-center. If needed,
a perforated reflector plate can be installed on the tank bottom directly under the
transmitter center line to ensure a satisfactory return echo.
 Avoid detecting pump casings, as the liquid falls away, by not mounting the transmitter
directly above pumps. If this is not possible, fine-tuning of the transmitter on-site may
be required.
Figure 3-2. Tank Installation Considerations
A. Transmitter is Mounted Vertically (Maximum Deviation of 3°)
B. Use Non-metallic Fitting or Flange
C. 6° Beam Half Angle
D. 1.3 in./ft. (11 cm/m). Minimum of 12 in. (0,3 m)
A
D
B
C

Emerson Rosemount 3100 Series Specifications

General

Brand	Emerson
Model	Rosemount 3100 Series
Category	Transmitter
Language	English