FlowLine EchoSpan LU80 series User manual

31 MAR 11 EchoSpan 1 of 22
Rev B MN301550
EchoSpan
LU80-5101, LU8-5161,LU81-5101, LU81-5161,
LU83-5101, LU83-5161, LU84-5101 & LU84-5161
Series
Revision A.1

2 of 22 EchoSpan 31 MAR 11
MN301550 Rev B
Preface
This manual explains how to use the EchoSpan, LU81, LU83 and LU84 series transmitter.
Warranty, Service & Repair
To register your product with the manufacturer, go to the Flowline website for on-line registration. The website
address is as follows:
www.flowline.com
On-line Warranty Registration can be found on the Flowline home page.
If for some reason your product must be returned for factory service, go to the Flowline website to receive a
Material Return Authorization number (MRA), providing the following information:
1. Full Part Number, Full Serial Number
2. Name and telephone number of someone who can answer technical questions related to the product
and its application.
3. Return Shipping Address
4. Brief Description of the Symptom
5. Brief Description of the Application
On-line Material Return Authorization can be found under Support in the Navigation Bar along the side of the
home page. Click on Return Authorization to begin the MRA request. Once you have received a MRA
number, ship the product prepaid in its original packing to:
Flowline Factory Service
MRA_____
10500 Humbolt Street
Los Alamitos, CA 90720
To avoid delays in processing your repair, write the MRA on the shipping label. Please include the information
about the malfunction with your product. This information enables our service technicians to process your
repair order as quickly as possible.

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Warranty
Flowline warrants to the original purchaser of its products that such products will be free from defects in
material and workmanship under normal use and service in accordance with instructions furnished by Flowline
for a period, which is equal to the shorter of one year from the date of purchase of such products or two years
from the date of manufacture of such products. Flowline's obligation under this warranty is solely and
exclusively limited to the repair or replacement, at Flowline's option, of the products or components, which
Flowline's examination determines to its satisfaction to be defective in material or workmanship within the
warranty period. Flowline must be notified pursuant to the instructions below of any claim under this warranty
within thirty (30) days of any claimed lack of conformity of the product. Any product repaired or replaced
under this warranty will be warranted only for the remainder of the original warranty period.
Returns
Products cannot be returned to Flowline without Flowline's prior authorization. To return a product that is
thought to be defective, go to www.flowline.com, and submit a customer return (MRA) request form and follow
the instructions therein. All warranty and non-warranty product returns to Flowline must be shipped prepaid and
insured. Flowline will not be responsible for any products lost or damaged in shipment.
Limitations
This warranty does not apply to products which: 1) are beyond the warranty period or are products for which
the original purchaser does not follow the warranty procedures outlined above; 2) have been subjected to
electrical, mechanical or chemical damage due to improper, accidental or negligent use; 3) have been modified
or altered; 4) anyone other than service personnel authorized by Flowline have attempted to repair; 5) have
been involved in accidents or natural disasters; or 6) are damaged during return shipment to Flowline. Flowline
reserves the right to unilaterally waive this warranty and dispose of any product returned to Flowline where: 1)
there is evidence of a potentially hazardous material present with the product; or 2) the product has remained
unclaimed at Flowline for more than 30 days after Flowline has dutifully requested disposition. This warranty
contains the sole express warranty made by Flowline in connection with its products. ALL IMPLIED
WARRANTIES, INCLUDING WITHOUT LIMITATION, THE WARRANTIES OF MERCHANTABILITY
AND FITNESS FOR A PARTICULAR PURPOSE, ARE EXPRESSLY DISCLAIMED. The remedies of
repair or replacement as stated above are the exclusive remedies for the breach of this warranty. IN NO EVENT
SHALL FLOWLINE BE LIABLE FOR ANY INCIDENTAL OR CONSEQUENTIAL DAMAGES OF ANY
KIND INCLUDING PERSONAL OR REAL PROPERTY OR FOR INJURY TO ANY PERSON. THIS
WARRANTY CONSTITUTES THE FINAL, COMPLETE AND EXCLUSIVE STATEMENT OF
WARRANTY TERMS AND NO PERSON IS AUTHORIZED TO MAKE ANY OTHER WARRANTIES OR
REPRESENTATIONS ON BEHALF OF FLOWLINE. This warranty will be interpreted pursuant to the laws
of the State of California. If any portion of this warranty is held to be invalid or unenforceable for any reason,
such finding will not invalidate any other provision of this warranty.

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Introduction:
The EchoSpan is a general-purpose ultrasonic level transmitter that provides a loop powered 4-20 mA output.
The 4-20 mA output can be used to provide the proportional level of liquid in any tank or vessel. The signal
can be connected to any device that accepts a loop powered 4-20 mA signal, such as a PLC, SCADA, DCS,
display, controller, etc.
New Features
Simple configuration with push button configuration
Adjustable Loop Fail-Safe, Hold Last, Empty, Full, 21 mA, 22 mA
Easy to reverse mA output, 4-20 mA to 20-4 mA
Increased output filtering
Table of Contents
Introduction ............................................................................................................................5
About this manual......................................................................................................................5
Specifications ............................................................................................................................7
Dimensions ............................................................................................................................7
Wiring ............................................................................................................................8
To a Display, Controller & PLC....................................................................................8
Getting Started.........................................................................................................................10
Feature Guide...............................................................................................................11
Getting Around ............................................................................................................11
How to enter the MENU..............................................................................................12
How to configure UNITS.............................................................................................12
How to configure the DISPLAY..................................................................................13
How to configure the operational range (Height & Fill-H).........................................14
How to reverse the current output (Rev mA)...............................................................15
How to set the Fail-Safe (SAFE) settings....................................................................15
How to set Target Calibration (TG CAL)....................................................................16
Installation ..........................................................................................................................17
Mounting Guide...........................................................................................................17
Fitting Selection...........................................................................................................18
Appendix ..........................................................................................................................21
SETUP .........................................................................................................................21
Diagnostic (DIAG) parameters....................................................................................21
Reset ..........................................................................................................................21
Troubleshooting...........................................................................................................22

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About this Manual:
PLEASE READ THE ENTIRE MANUAL PRIOR TO INSTALLING OR USING THIS PRODUCT. This
manual includes information on the EchoSpan series Ultrasonic Level Switch from FLOWLINE. Please refer to
the part number located on the switch label to verify the exact model configuration, which you have purchased.
User’s Responsibility for Safety:
FLOWLINE manufactures a broad range of level sensing technologies. While each of these sensors is designed
to operate in a wide variety of applications, it is the user’s responsibility to select a sensor model that is
appropriate for the application, install it properly, perform tests of the installed system, and maintain all
components. The failure to do so could result in property damage or serious injury.
Proper Installation and Handling:
Only professional staff should install and/or repair this product. Install the switch with the included Viton
gasket and never over tighten the switch within the fitting. Always check for leaks prior to system start-up.
Wiring and Electrical:
A supply voltage of 12 to 28 VDC is used to power the EchoSpan. Electrical wiring of the transmitter should
be performed in accordance with all applicable national, state, and local codes.
Material Compatibility:
The enclosure is made of Polycarbonate (PC). The transducer is made of Polyvinylidene Fluoride (PVDF).
Make sure that the model, which you have selected, is chemically compatible with the application media.
Enclosure:
While the switch housing is liquid-resistant the EchoSpan is not designed to be operational when immersed. It
should be mounted in such a way that the enclosure and transducer do not come into contact with the
application media under normal operational conditions.
The enclosure has a flip cover with dual 1/2” NPT female conduit ports and an internal terminal strip for wiring.
To open the enclosure, you will need a small insertion tool such as a screwdriver. Loosen the locking screw
located at the top front of the enclosure. Rotate the hinged cover up for 135° access to the faceplate and
terminal strips. Before closing the enclosure, make sure that the enclosure gasket is properly seated, and that
any conduit fittings, cable connectors or plugs are installed correctly and sealed.
Handling Static-Sensitive Circuits/Devices:
When handling the transmitter, the technician should follow these guidelines to reduce any possible electrostatic
charge build-up on the technician’s body and the electronic part.
1. Always touch a known good ground source before handling the part. This should be repeated while
handling the part and more frequently after sitting down from a standing position, sliding across the seat
or walking a distance.
2. Avoid touching electrical terminals of the part unless making connections.
3. DO NOT open the unit cover until it is time to calibrate.

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Make a Fail-Safe System:
Design a fail-safe system that accommodates the possibility of switch and/or power failure.
FLOWLINE recommends the use of redundant backup systems and alarms in addition to the primary system.
Flammable, Explosive or Hazardous Applications:
EchoSpan should not be used within classified hazardous environments.
Warning:
Always use the Viton gasket when installing the EchoSpan, and make sure that all electrical wiring of the
switch is in accordance with applicable codes.
Components:
EchoSpan is offered in three different models. Depending on the model purchased, you may or may not have
been shipped all the components shown below. You do however, need an EchoSpan and Viton® gasket to
configure, install and operate EchoSpan.
EchoSpan
oLU80-5101 –9.8’ (3 m) range, Type 4X encl., 1” NPT
oLU80-5161 –9.8’ (3 m) range, Type 4X encl., 1” G
oLU81-5101 –18.0’ (5.5 m) range, Type 4X encl., 2” NPT
oLU81-5161 –18.0’ (5.5 m) range, Type 4X encl., 2” G
oLU83-5101 –26.2’ (8 m) range, Type 4X encl., 2” NPT
oLU83-5161 –26.2’ (8 m) range, Type 4X encl., 2” G
oLU84-5101 –32.8’ (10 m) range, Type 4X encl., 2” NPT
oLU84-5161 –32.8’ (10 m) range, Type 4X encl., 2” G
Viton Gasket
oPart #220128 –for LU80 series only
oPart #220129 –for LU81, LU83 and LU84 series
Quick Start Guide

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Specifications:
Range: LU80: 4" to 9.8'
(10 cm to 3m)
LU81: 8" to 18.0'
(20 cm to 5.5m)
LU83: 8" to 26.4'
(20 cm to 8m)
LU84: 12" to 32.8'
(30 cm to 10m)
Accuracy: ± 0.2% of range
Resolution: LU80: 0.019”
(0.5mm)
LU81/83: 0.039”
(1mm)
LU84: 0.078”
(2 mm)
Dead band: LU80: 4” (10cm)
LU81\83: 8” (20
cm)
LU84: 12” (30 cm)
Beam width: LU80: 2” (5cm)
LU81/83/84” 3"
(7.6 cm) dia.
Configuration: Push button
Memory: Non-volatile
Display type: LCD, 6-digit
Display units: Inch, cm, Feet, m or
percent
Supply voltage: 12-28 VDC
Loop resistance: 500 Ohms @ 24
VDC
Signal output: 4-20 mA, two-wire
Signal invert: 4-20 mA / 20-4 mA
Signal fail-safe: 4mA, 20 mA, 21
mA, 22 mA, hold
last
Process temp.: F: -4° to 140°
C: -20° to 60°
Temp. comp.: Automatic
Ambient temp.: F: -31° to 140°
C: -35° to 60°
Pressure: MWP = 30 PSI
Enclosure rating: NEMA 4X (IP65)
Encl. material: PC/ABS FR
Encl. hardware: Brass and stainless
Enclosure vent: Water tight
membrane
Conduit entrance: Dual, 1/2” NPT
Trans. material: PVDF
Process mount: LU80: 1” NPT/1” G
LU81/83/84: 2”
NPT/2” G
Mount. gasket: Viton®
Classification: General purpose
Compliance: CE, RoHS
Dimensions:
Side View / LU80 Series
Side View / LU81, LU83 and LU84 Series

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Wiring to Display, Controllers & PLC’s
Below is a quick review of wiring the EchoSpan to common display, controllers and PLC’s.
DataView LI55 Series
Level Controller
Commander LI90 Series
Multi-Tank Level Controller
DataLoop LI25 Series
Level Indicator
without the backlight
DataLoopLI25 Series
Level Indicator
with the backlight

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Wiring to Display, Controllers & PLC’s (continued)
DataPoint LC52 Series
Level Controller
JWA mode (Factory Setting)
DataPoint LC52 Series
Level Controller
JWB mode
Generic Loop
Powered Display
Generic PLC

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General notes for electrical connections, usage and safety:
Where personal safety or significant property damage can occur due to a spill, the installation
must have a redundant backup safety system installed.
Wiring should always be completed by a licensed electrician.
Supply voltage should never exceed 28 VDC.
The sensor materials must be Chemically compatible with the liquids to be measured.
Design a fail-safe system for possible sensor and/or power failure.
Never use the sensor in environments classified as Hazardous.
Voltage Output
EchoSpan can be used as a 0 to 5 or 0 to 10 VDC output device. A resistor will need to be added to
the circuit to enable a voltage output (refer to the wiring diagram below).
0-5 VDC output
oAdd a 250 Ohm resistor
oActual output will be 0.8 to 5 VDC
0-10 VDC output
oAdd a 500 Ohm resistor
oActual output will be 2 to 10 VDC
Getting Started:
EchoSpan can be configured before installation. The switch features non-volatile memory, so the set
points configured before installation will not be lost when the switch is powered down. To start, all
you need is the following information:
Basic Tank Information:
oHEIGHT –Distance from the transducer face to
the bottom of the tank.
oFILL-H –Maximum fill height of the liquid from
the bottom of the tank.
oThese values will all be in the same distance
value (inches, centimeters, feet or meters) and
will all be measured from the bottom of the tank.
Power:
oProvide 12 to 28 VDC input power to the
EchoSpan.

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Feature Guide:
FEATURE
ACCESS BY
Easy to use MENU
Press and hold SELECT key until MENU is displayed
approximately 5 seconds. The MENU items will rotate
through display, press SELECT to change an item.
Many UNITS of
measurement.
In the MENU mode, press SELECT when UNITS is
display, then select INCHES, CM (centimeter), FEET,
METERS or PERCENT.
No cumbersome measure
required. Set point
distances are relative to the
tank bottom.
In MENU mode, select the TANK item and set the
HEIGHT of the tank from the transducer face to the bottom
of the tank. Set the Fill Height (FILL-H) to the maximum
fill height of the liquid from the bottom of the tank. Now
all of the set points are from the bottom of the tank up.
Optional Target Calibration
Use this feature if the tank is at the empty or full setting.
This will accept the current level as either empty (TG CAL
EMPTY) of full (TG CAL FULL).
Fail-Safety
Use the SAFE function to preset the output to either Empty
(4 mA), Full (20 mA, 21 mA or 22 mA) or Hold Last Value
in case the transmitter looses its signal (LOST).
Getting around:
EchoSpan is configured by the use of three push buttons (UP, DOWN and SELECT) and a LCD
display. As a lockout feature, the buttons are inactive until the SELECT button is held down for 5
seconds, and then the display will begin to scroll through the top level of the configuration menu.
Steps for Basic Configuration:
1. Select and Set the units of operation in the UNITS menu.
2. Configure the Sensor Height and Fill-H under the TANK menu.
3. Set the SAFE vaule.
Top Level
The Configuration menu will continue to scroll through the items below until the SELECT
button is pressed.
UNITS –TANK – SAFE –TG CAL –VALUES - HELP –RUN.
To return to the Operational mode of EchoSpan, press SELECT while RUN appears in the
display.
UNITS –Allows end user to select the units for configuration and operation. Select between
Inches, Centimeters, Feet, Meters or Percent. Press EXIT to return to the Top Level menu.
TANK –Allows the end user to configure the operational range for the switch.
oHEIGHT –Distance from the transducer face to the bottom of the tank.
oFILL-H –Maximum fill height of the liquid from the bottom of the tank.
oREV MA –Allows the transmitter to reverse the current output such that 4 mA is at FULL
and 20 mA is at EMPTY.
oPress Exit to return to the Top level Menu.

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oNote: if UNITS is set to Percent, then TANK will not appear. To view TANK, set UNITS
to any of the following: Inches, Centimeters, Feet or Meters.
SAFE –The fail-safe for the EchoSpan can be preset to the customer’s requirement.
o22 mA –Overfill fail-safe setting.
o21 mA –Overfill fail-safe setting.
o20 mA –Full fail-safe setting.
o4 mA –Empty fail-safe setting.
oHOLD –Keeps the output at its last current reading when fail-safe condition occurs.
TG CAL –Target Calibration (allows for the sensor to accept the current level as either EMPTY
or FULL.
VALUES –Provides setup information, the ability to reset the EchoSpan and a simulation mode
to test the relay function.
oSETUP –Will display the setting for all functions of EchoSpan.
oDIAG –This is a production test feature used by the factory to confirm operation. This
mode should only be used when supervised by a Flowline representative.
oRESET –Will reset the EchoSpan back to its original factory setting.
HELP –Provides information for contacting Flowline no-line.
RUN –Returns the unit to normal measurement and control mode.
How to enter the MENU:
1. Press and hold SELECT key (approximately 5 seconds) until MENU is displayed.
2. The menu items will rotate through display.
3. Press SELECT to change an item.
How to configure UNITS:
1. In the MENU mode, press select when UNITS is
display.
2. Press SELECT to choose between INCHES, CM
(centimeter), FEET, METERS or PERCENT.
3. Select EXIT to return to the Top Level Menu.

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Note: Reading the level of liquid in Percent:
Flowline recommends that when selecting PERCENT, configure the HEIGHT and FILL-H
settings before selecting PERCENT in order to span the EchoSpan for your application
requirements.
When in PERCENT, the operational span will be based upon the last TANK settings, typically
the factory settings for HEIGHT and FILL-H.
EchoSpan
HEIGHT
FILL-H
LU80 Series
118.1” (300 cm)
114.1” (290 cm)
LU81 Series
216.5” (550 cm)
208.5” (530 cm)
LU83 Series
314.9” (800 cm)
307.1” (780 cm)
LU84 Series
393.7” (1000 cm)
381.9” (970 cm)
When PERCENT is selected, the TANK settings (HEIGHT and FILL-H) will be disabled.
DISPLAY - AIR Mode vs. LIQUID Mode:
The display can be made to display either the height of liquid
in the tank (LIQUID mode) or the amount of air in the tank
(AIR mode).
AIR mode –Will display the distance from the bottom of the
sensor to the surface of the liquid.
LIQUID mode –Will display the height of liquid measured
from the bottom of the tank.
How to change the display mode:
1. In the MENU mode, press select when UNITS is
display.
2. Press SELECT when DISPLAY appears.
3. Press SELECT to choose between AIR or LIQUID.
4. When EXIT appears, press SELECT return to Top
Level Menu.

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How to configure the Operational range of EchoSpan:
No cumbersome measurement is required via Target
Calibration to establish set points. Set point distances are
relative to the tank bottom.
1. In MENU mode, select the TANK item.
2. When HEIGHT appears, press SELECT.
3. Using the UP and DOWN buttons, set the HEIGHT of
the tank from the transducer face to the bottom of the
tank.
4. To enter the value, press and hold SELECT
(Approximately 2 seconds) until SAVED is displayed.
5. When FILL-H appears, press SELECT.
6. Using the UP and DOWN buttons, set the Fill Height
(FILL-H) to the maximum fill height of the liquid from
the bottom of the tank.
7. Press and hold SELECT (2 seconds) to enter the value.
8. When EXIT appears, press SELECT return to Top Level
Menu.
Sensor Height
Fill-Height
Note:
Flowline recommends that when selecting PERCENT, configure the Height and Fill-H
settings before selecting PERCENT in order to span the EchoSpan for your application
requirements.
When PERCENT is selected, the TANK settings (Height and Fill-H) will be disabled.

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How to set a Reverse the Current Output:
The default for EchoSpan is to have 4 mA at Empty and 20
mA at Full. This is the normal (NORM) setting. The output
can be reversed (REV) with 20 mA at Empty and 4 mA at
Full.
1. In MENU mode, select the TANK item.
2. When REV MA appears, press SELECT.
3. When REV appears, press SELECT.
4. When EXIT appears, press SELECT return to Top
Level Menu.
EchoSpan is now in the Reverse mode. To switch back to the
Normal mode, follow the instructions above and select
NORM under step 3.
How to set the SAFE setting:
The default for Fail-Safety (LOST) can be preset. The
choices are 4 mA, 20 mA, 21 mA, 22 mA and HOLD.
1. In MENU mode, select the SAFE item.
2. When the required setting appears, press SELECT.
3. When EXIT appears, press SELECT return to Top
Level Menu.

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How to set using Target Calibration (Empty):
Instead of measuring for Empty tank, the Empty distance can
be set automatically. This method requires that the tank be
Empty or at the level that is considered Empty in the
application. To set TG Empty, follow the instructions below.
1. Before beginning, make sure the level is tank is at the
Empty level.
2. In MENU mode, select the TG CAL item.
3. When EMPTY appears, press SELECT. This sets the
current distance as the new Empty setting.
4. When EXIT appears, press SELECT return to Top
Level Menu.
How to set using Target Calibration (Full):
Instead of measuring for Full tank, the Full distance can
be set automatically. This method requires that the tank
be Full or at the level that is considered Full in the
application. To set TG Full, follow the instructions
below.
1. Before beginning, make sure the level is tank is at
the Full level.
2. In MENU mode, select the TG CAL item.
3. When FULL appears, press SELECT. This sets
the current distance as the new Full setting.
4. When EXIT appears, press SELECT return to
Top Level Menu.
Note: When setting either the TG EMPTY or TG FULL, make sure the reflective surface is
perpendicular to the EchoSpan and not at an angle. Be careful if the tank has a sloped or cone
bottom and the bottom of the tank is exposed to air.

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Installation
The EchoSpan 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 LU80
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. For LU80 Series - mount at least 2” from the side wall
b. For LU81, LU83 & LU84 Series - mount at least 3” from the side wall
4. Do not mount where obstacles will intrude on sensor’s beam width
a. See Specifications on page 8
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.
Do not install at
angle relative to the
liquid.
Do not install within
3” of tank sidewall.
Do not install with
objects in the beam.
Do not install in
applications with
vacuum.
Installation in existing fittings
If the existing fitting is larger than the threads of the EchoSpan, select a reducer bushing such as the
LM52-1400 (2” thread x 1” thread) or LM52-2400 (3” thread x 2” thread).
Metal Tanks (LU80 series)
Flowline ultrasonic transmitters 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 vibrations.

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Fitting Selection:
Check the part number to determine the required fitting mount size and thread type. EchoSpan is
commonly installed in tank adapters, flanges, brackets or standpipes. Note: Always include the
gasket when installing the EchoSpan.
1. Tank Adapter: Select a tank adapter fitting, such as the LM52-1890 for the LU80 series or
the LM52-2890 for the LU81, LU83 & LU84 series.
a. For best results, select a 2” tank adapter and add a reducer bushing such as the
LM52-1400, thread x thread, reducer bushing.
b. Avoid tank adapter (thread x thread) styles and/or pipe stops forward of the installed
transducer.
2” Tank Adapter
Socket x Thread
Tank Adapter
w/ 2”x1” Reducer Bushing
Tank Adapter
Thread x Thread
Do not use thread x thread
2. Riser: Installations with tall, narrow risers can impede the acoustic signal.
a. LU81, LU83 & LU84 Series: 2” (5 cm) diameter risers should be no taller than 5”
(12.7 cm). Larger diameter risers should be no taller than 12” (30.5 cm).
b. LU80 Series:
Note: Do not exceed the dimensions listed above

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3. Flange (LU80 series): If installing on a flange, select a flange with a thread that is above the
plane of the flange, such as the LM52-1850.
a. The LU81, LU81 & LU83 series works well with Flange installations.
b. Avoid the use of blind flanges with tapped threads or flanges where the threads are
even with the plane of the flange, such as the Banjo 1" Poly ANSI Flange (series
AF100).
c. Use a flange with a 2” thread and add a 2” to 1” reducer bushing to complete the
installation.
2” Flange w/
thread out of plane
2” Flange w/
thread in plane
2” Flange w/
Reducer Bushing
Do not use thread in plane
4. Side Mount Bracket: For installations in open tanks and sumps, use the LM50 series side
mount bracket.
a. For the LU80 series, order the LM50-1001-1, which includes a 2”x 1” Reducer
Bushing.
b. For the LU81, LU83 & LU84, series, order the LM50-1001 side mount bracket.

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5. Stand Pipe: A standpipe maybe used to dampen turbulence or when foam is present in the
application.
a. Pipe can be made of any material.
b. Select a minimum 3” ID pipe for the stand pipe.
i. A 2” pipe is usable with the LU80 series, but is the minimum.
ii. Pipes larger than 3” can also be used.
c. Use a coupling and reducer bushing to attach the EchoSpan to the pipe.
i. With the LU80 series, be sure to use a plastic reducing bushing such as LM52-
1400 2” T x 1” T fitting or the LM52-1410 2” S x 1” T fitting.
d. The pipe length should run the measurement span and the bottom of the pipe should
remain submerged at all times to prevent foam from entering the pipe.
e. Cut a 45°notch at the bottom of the pipe and drill a 1/4”pressure equalization hole in
the dead band.
f. The pumps should not drive liquid past the open end of the stand pipe which causes
the liquid in the pipe to oscillate.