Flowline LU78 EchoSwitch - Manual (Page 26)

26 of 34 MN300282 Rev A
INSTALLATION Step Seven
The EchoSwitch® should always be mounted perpendicular to the liquid surface and installed using the
provided Viton® mounting gasket. Make sure that the fitting and transmitter threads are not damaged or
worn. Always hand‐tighten the transmitter within the fitting. Perform an installed leak test under normal
process conditions prior to system start up. Note: The preferred mounting fitting for the LU77 Series is the
LM52‐1400 (2” thread x 1” thread) reducer bushing.
Mounting Guide
1. Do not mount at an angle.
2. Liquid should never enter the dead band.
3. Side Wall:
a. Mount at least 3” from the side wall.
b. For LU77 Series ‐ mount at least 2” from the side
wall.
4. Do not mount where obstacles will intrude into sensor’s
beam width.
a. Beam Width: 3” (7.6cm) diameter [2” (5cm) for
LU77 series].
5. Do not mount in a vacuum.
6. Avoid mounting in the center of a dome top tank.
7. In cone bottom tank, position the sensor over the
deepest part of the tank.
Installation in existing fittings: If the existing fitting is larger
than the threads of the EchoSwitch®, select a reducer
bushing such as the LM52‐1400 (2” thread x 1” thread) or
LM52‐2400 (3” thread x 2” thread).
LM52‐1400 LM52‐2400
Do not install at
angle relative to
the liquid.
Do not install
within 2” of tank
sidewall.
(3” for DL34 series)
Do not install with
objects in the
beam.
Do not install in
applications with
vacuum.
Metal Tanks (LU77 Series Only): Flowline ultrasonic sensors have been optimized for use in non‐metallic
fittings.
1. For best performance, avoid the use of metallic fittings.
a. Use a plastic 2” x 1” reducer bushing, such as the LM52‐1400 or a plastic 1” flange, such as the
LM52‐1850 for metallic tanks.
2. While installations directly into a 1” metal fitting are not recommended, acceptable results may be
obtained if the 1” fitting is a half coupling in form and the outer diameter of the coupling is tightly
wrapped in vinyl tape to dampen vibration.