Flowline LU20 Operating Manual
n
U
u
Ech
o
q
e
u
n
2
Ultrasonic Li
To
uid Level Tra
ch®
smitter
20 Seri
L
s Manua
l
Flowli
e, Inc. | 10500 H
mbolt Street, Los
Alamitos, CA 907
0 p 562.598.3015 f 562.431.8507 w flowline.com MN201800 Rev A2
Introduction / Table of Contents Step One
An ultrasonic sound wave is pulsed two times per second from the base of the transducer. The sound wave
reflects against the process medium below and returns to the transducer. The microprocessor based
electronics measure the time of flight between the sound generation and receipt, and translates this figure into
the distance between the transmitter and process medium below.
TABLE OF CONTENTS
Specifications ........................................................................................................................ 3
Control Drawings ........................................................................................................ 4
Dimensions ................................................................................................................ 4
Components ................................................................................................................ 4
Safety Precautions .................................................................................................................. 5
Menu / Definitions ................................................................................................................... 6
Configuration ........................................................................................................................ 8
Steps for Basic Configuration ..................................................................................... 8
Selecting Units of Operation ....................................................................................... 8
Configure Sensor’s Current Range ............................................................................. 8
Configure Operational Range ..................................................................................... 9
Configure Fail-Safe .................................................................................................... 9
Wiring ….. ....................................................................................................................... 10-13
Installation ............................................................................................................................. 14
Mounting Guide ......................................................................................................... 14
Fitting Selection ........................................................................................................ 15
Tank Adapter ................................................................................................. 15
Riser .............................................................................................................. 15
Flange ........................................................................................................... 15
Side Mount Fitting ......................................................................................... 16
Stand Pipe ..................................................................................................... 16
Appendix ............................................................................................................................... 17
Factory Settings and Reset ....................................................................................... 17
Changing Display units ............................................................................................. 17
Troubleshooting .................................................................................................................... 18
Other Hints ................................................................................................................ 19
Testing the transmitter .............................................................................................. 19
User Settings ............................................................................................................ 19
Warranty, Returns and Limitations ....................................................................................... 20
| 2 MN201800 Rev A2
Specifications Step Two
Range: 0.5 to 18 feet (15cm to 5.4m)
Accuracy: ± 0.25% of range
Resolution: 0.125” (3mm)
Frequency: 50kHz
Pulse rate: 2 pulses per second
Beam width: 8° conical
Dead band: 0.5’ (15cm) minimum
Display type: 4 segment LCD
Display units: Inch or cm
Memory: Non-volatile
Supply voltage: GP: 12-36 VDC
IS: 12-32 VDC
Max loop resistance: GP: 900 Ohms @ 36 VDC
IS: 900 Ohms @ 32 VDC
Signal output: GP: 4-20mA, 12-36 VDC
IS: 4-20mA, 12-32 VDC
Signal invert: 4-20 mA / 20-4 mA
Configuration: Push button
Fail-Safe diagnostics: Revert to 4mA, 22mA
or remains constant
Temperature rating: F: -40° to 140°.
C: -40° to 60°
Temp. compensation: Automatic over entire range
Pressure rating: 30 psi (2 bar) @ 25 °C.,
derated @ 1.667 psi (.113 bar)
per °C. above 25 °C.
Enclosure rating: NEMA 4X (IP65)
Enclosure material: Polypropylene (PP), U.L. 94VO
Transducer material: Polyvinylidene Fluoride (PVDF)
Process mount: 2” NPT (2” G)
Mount gasket: Viton (2”) metric only
Conduit entrance: Single, 1/2” NPT
CE compliance: EN 50082-2 immunity
EN 55011 emission
CSA certificate: LR79326-10
* GP = General Purpose
* IS = Intrinsically Safe
MN201800 Rev A2 3 |
Specifications Step Two
INTRINSICALLY SAFE CONTROL DRAWINGS
Intrinsically Safe Approvals
Class I, Groups A, B, C & D; Class II, Groups E, F & G; Class III; TC3
Intrinsically Safe Entity Parameters
< 32.0 V; I
V
max
Part# Description Thread
LU20-5001 General Purpose 2” NPT
LU20-5061 General Purpose 2” G
LU20-5001-IS Intrinsically Safe 2” NPT
LU20-5061-IS Intrinsically Safe 2” G
< 130 mA; Ca = 0μF; La = 0μH
max
Dimensional Info:
| 4 MN201800 Rev A2
Safety Precautions Step Three
About this Manual: PLEASE READ THE ENTIRE MANUAL PRIOR TO INSTALLING OR USING THE
PRODUCT. This manual includes information on all four versions of the continuous ultrasonic level
transmitter from Flowline; model LU20-50_1 and LU20-50_1-IS. Please refer to the part number located on
the sensor label to verify the exact model which you have purchased.
User’s Responsibility for Safety: Flowline manufactures a wide range of liquid level sensors and
technologies. While each of these technologies are designed to operate in a wide variety of applications, it
is the user’s responsibility to select a technology 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: Because this is an electrically operated devise, only properly trained
staff should install and/or repair this product. Use a proper sealant with all installations. NOTE: Always
install the 2” Viton gasket with the LU20-5061 and the LU20-5061-IS. The G threaded version of the
Echotouch will not seal unless the gasket is installed properly. Never over tighten the transmitter within the
fitting. Always check for leaks prior to system start-up.
Wiring and Electrical: A supply voltage of 12-36 VDC is used to power the LU20-50_1 transmitter and
supply voltage of 12-32 VDC is used to power the LU20-50_1-IS. The sensor system should never exceed
a maximum of 36 VDC for the LU20-50_1 and 32 VDC for the LU20-50_1-IS. Electrical wiring of the sensor
should be performed in accordance with all applicable national, state, and local codes.
Temperature and Pressure: The LU20 is designed for use in application temperatures from -40 °C (-40
°F) to 60 °C (140 °F), and for use at pressures up to 30 psi @ 25 °C, derated @ 1.667 psi per °C above 25
°C.
Material compatibility: The continuous ultrasonic level transmitter, LU20, is made of two materials. The
enclosure is of Polypropylene (PP) and the transducer is made of Polyvinylidene fluoride (PVDF). Make
sure that the model which you have selected is chemically compatible with the application liquids. While the
transmitter housing is liquid resistant when installed properly, it is not designed to be immersed. It should
be mounted in such a way that it does not normally come into contact with fluid.
Flammable, Explosive and Hazardous Applications: Only the LU20-50_1-IS is rated for use in
hazardous locations. Refer to the certificate of compliance for all applicable intrinsically safe ratings and
entity parameters for the LU20-50_1-IS. Refer to the National Electric Code (NEC) for all applicable
installation requirements in hazardous locations. DO NOT USE THE LU20-50_1 GENERAL PURPOSE
TRANSMITTER IN HAZADROUS LOCATIONS.
Make a Fail – Safe System: Design a fail–safe system that accommodates the possibility of transmitter or
power failure. In critical applications, Flowline recommends the use of redundant backup systems and
alarms in addition to the primary system.
MN201800 Rev A2 5 |
Menu / Definitions Step Four
Getting around: Echotouch is configured by the use of four push buttons (UP, DOWN, MENU and SET) and a
LCD display. The display will always read the distance from the bottom of the sensor to the surface of the liquid
(air gap).
Main Menu: Holding down the MENU button will scroll down the main menu of the Echotouch.
DEFINITIONS
EC4: This is the 4 mA setting for the LU20. The EC4 is the distance from the bottom of the LU20 to the 4 mA
set point. Typically, the EC4 or 4mA setting is at the bottom of the tank. The further away from the sensor, the
larger the number will be. This setting is measured in either inches or centimeters on the display.
EC20: This is the 20 mA setting for the LU20. The EC20 is the distance
from the bottom of the LU20 to the 20 mA set point. Typically, the EC20
or 20 mA setting is at the top of the tank. The closer to the sensor, the
smaller the number will be. This setting is measured in either inches or
centimeters on the display.
Reversing the 4-20 mA signal: Setting the EC4 at the bottom of the
tank and EC20 at the top of the tank will create a 4-20 mA output that
has 4 mA at empty and 20 mA at full. To reverse the 4-20 mA signal,
simply set EC4 at the top of the tank and EC20 at the bottom of the tank.
SAF1/SAF2/SAF3: This is the fail-safe setting for the LU20. Use the
SAF_ setting to determine a fail–safe mode for the current signal. When
[SAF1] is set, the current will increase to 22 mA if the signal becomes
LOST. When [SAF2] is set, the current will decrease to 4 mA if the signal
becomes LOST. When [SAF3] is set, the current will remain constant if
the signal becomes LOST.
LOST: A LOST state will occur when the sensor does not receive a return sound pulse signal. When this
occurs, the display will show LOST and the current output will default to the SAF_ setting. The sensor will
remain in this condition until a valid signal is acquired. No values in the MENU can be changed until the LOST
condition has been resolved.
| 6 MN201800 Rev A2
Loading...