Warranty, Service & Repair

To register your product with the manufacturer, fill out the enclosed warranty card and return it immediately to:

Flowline Inc.

10500 Humbolt Street

Los Alamitos, CA 90720.

If for some reason your product must be returned for factory service, contact Flowline Inc. to receive a Material Return Authorization number (MRA) first, providing the following information:

1. Part Number, 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

Once you have received a Material Return Authorization 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.

®

Ultrasonic Level Transmitter

Model LU50

Owner’s

Manual

Version 1.1A

© 1999 FLOWLINE Inc.

All rights reserved.

Manual # LU900009 12/99

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 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.

This warranty covers only those components of the products which are non-moving and not subject to normal wear. Moreover, products which are modified or altered, and electrical cables which are cut to length during installation are not covered by this warranty.

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 thereof) which Flowline’s examination proves to its satisfaction to be defective. FLOWLINE SHALL HAVE NO

OBLIGATION FOR CONSEQUENTIAL DAMAGES TO PERSON-

AL OR REAL PROPERTY, OR FOR INJURY TO ANY PERSON.

This warranty does not apply to products which have been subject to electrical or chemical damage due to improper use, accident, negligence, abuse or misuse. Abuse shall be assumed when indicated by electrical damage to relays, reed switches or other components. The warranty does not apply to products which are damaged during shipment back to Flowline’s factory or designated service center or are returned without the original casing on the products. Moreover, this warranty becomes immediately null and void if anyone other than service personnel authorized by Flowline attempts to repair the defective products.

Products which are thought to be defective must be shipped prepaid and insured to Flowline’s factory or a designated service center (the identity and address of which will be provided upon request) within

30 days of the discovery of the defect. Such defective products must be accompanied by proof of the date of purchase.

Flowline further reserves the right to unilaterally wave this warranty and to dispose of any product returned to Flowline where: a. There is evidence of a potentially hazardous material present with product.

b. The product has remained unclaimed at Flowline for longer than

30 days after dutifully requesting disposition of the product.

THERE ARE NO WARRANTIES WHICH EXTEND BEYOND

THE DESCRIPTION ON THE FACE OF THIS WARRANTY. This warranty and the obligations and liabilities of Flowline under it are exclusive and instead of, and the original purchaser hereby waives, all other remedies, warranties, guarantees or liabilities, express or implied. EXCLUDED FROM THIS WARRANTY IS THE IMPLIED

WARRANTY OF FITNESS OF THE PRODUCTS FOR A PARTIC-

ULAR PURPOSE OR USE AND THE IMPLIED WARRANTY OF

MERCHANT ABILITY OF THE PRODUCTS.

This warranty may not be extended, altered or varied except by a written instrument signed by a duly-authorized officer of Flowline, Inc.

SPECIFICATIONS

Step One

Range:

Accuracy:

1.5 to 40 feet (.5 to 12.2 m)

± 0.25% of span (air)

Resolution:

Frequency:

Pulse rate:

Beam width:

0.125” (3 mm)

26 kHz

8 pulses per second

4°

Blocking distance: 1.5' (.5 m) minimum

Display type:

Display units:

Memory:

Supply voltage:

Consumption:

Current flow:

Signal output:

Signal invert:

Signal averaging:

Calibration:

4 segment LED

Inches

Non-volatile

14-36 VDC

200 mA

Source / sink

4-20 mA, 14-36 VDC

4-20 mA / 20-4 mA

Fast / slow

Push button

Relay type:

Relay output:

Relay mode:

Relay indication:

(1) SPDT

250 VAC, 10A, 1/2 hp

Selectable, NO or NC

ON / OFF status

Contact resistance: 30 milliohm

Fail-safe diagnostics: Relay reverts to safe position

Temperature rating: F: -40º to 140º C: -40º to 60º

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, U.L. 94VO

Transducer material: Polyvinylchloride

Mounting conn.: 3” ANSI / DIN 80 flange

Conduit connection: 1/2" NPT

CE compliance: EN 50082-2 immunity

EN 55011 emission

EN 61010-1 safety

Technology

An ultrasonic sound wave is pulsed eight 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.

Side View

2.8" (71 mm)

4.2" (106 mm)

4.7" (119 mm)

Ultrasonic Transmitter

LU50 - 7 0 _ _

Flange Type

0 - 3” ANSI

6 - DIN 80

Switch Output

3 - 4-20 mA, Sourcing

4 - 4-20 mA, Sinking

Sinking vs. Sourcing

The LU50 is manufactured in two different outputs, sourcing and sinking. A sourcing transmitter uses the negative of the power supply as the reference for the entire system. When using a sourcing unit, make sure the negative of the ground is the common for the entire system. A sinking transmitter uses the positive of the power supply as the reference for the entire system. When using a sinking unit, make sure the positive of the ground is the common for the entire system.

Sourcing

LU50-70_3

DC Power

Supply

14-36 VDC

200 mA min.

+ -

( + ) - R e d

( - ) - B l a c k

S i g n a l - W h i t e

+

Sinking

LU50-70_4

DC Power

Supply

14-36 VDC

200 mA min.

+ -

( + ) - R e d

( - ) - B l a c k

S i g n a l - W h i t e

+

Top View

4.7” (119 mm)

4.2” (106 mm)

2.8” (71 mm)

Flange not shown

35

30

25

20

15

Temperature/Pressure Derating

Acceptable

Range

Unacceptable

Range

10

05

00

- 4 0 - 2 0 0 0 2 0 4 0 6 0 8 0

Temperature (

°

C)

Maximum Temperature/Voltage Derating

Continuous 20 mA Curve

100

80

Unacceptable

Range

60

40

20

Acceptable

Range

0

12 16 20 24 28 32 36

Operating Voltage (VDC)

Flowline 4 or 20 mA

Sensor Electrical Loading Limits

2,000

1,500

Unacceptable

Range

1,000

500

Acceptable

Range

0

12 18 24 30 36

Supply Volyage (VDC)

LU50-70_4 LU50-70_3

SAFETY PRECAUTIONS

Step Two

About this Manual:

PLEASE READ THE ENTIRE MANUAL PRIOR TO INSTALLING

OR USING THIS PRODUCT. This manual includes information on the continuous ultrasonic level transmitter from FLOWLINE; model

LU50-70__. 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 device, only properlytrained staff should install and/or repair this product. Use a proper sealant with all installations. Never overtighten the transmitter within the fitting. Always check for leaks prior to system start-up.

Wiring and Electrical:

A supply voltage of 14-36 VDC is used to power the LU50 transmitter. The sensor systems should never exceed a maximum of 36

VDC. Electrical wiring of the sensor should be performed in accordance with all applicable national, state, and local codes.

Temperature and Pressure:

The LU50 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

(2 bar) @ 25 °C, derated @ 1.667 psi (.113 bar) per °C above 25 °C.

Material Compatibility:

The continuous ultrasonic level transmitter, LU50, is made of two materials. The enclosure is of Polypropylene (PP) and the transducer is made of Polyvinylchloride (PVC). Make sure that the model which you have selected is chemically compatible with the application liquids and vapors. 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:

The LU50 level transmitter systems should not be used within flammable or explosive applications.

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.

Warning

The LU50-70_3 is a sourcing transmitter which provides internal 4-20 mA excitation and should be used with a sinking device.

The LU50-70_4 is a sinking transmitter which requires external

4-20 mA excitation and should be used with a sourcing device.

All measurement values used for programming the LU50 are made from the bottom of the transmitter down to the liquid surface.

DEFINITIONS

Step Three

EC20

EC4

20 mA

4 mA

EC4: The 4 mA setting for the LU50.

The EC4 is the distance from the bottom of the LU50 to the 4 mA set point.

This setting is measured in either inches or centimeters on the display. The

EC4 setting is typically greater that the

EC20 setting.

EC20: The 20 mA setting for the

LU50. The EC20 is the distance from the bottom of the LU50 to the 20 mA set point. This setting is measured in either inches or centimeters on the display.

RLAY: Indicator for the next two modes. The 10A relay is latched between the HSET and LSET points.

HSET & LSET: Sets the high point and low point for relay activation.

Relay will energize when display value is greater than the LSET value. Relay will de-energize when display value is less than the HSET value. The HSET value is always less that the LSET value. To activate the relay from a single point, set HSET and LSET to the same value.

HSET

De-Energized

Relay

LSET

Energized Relay

SAF1/SAF2: The 10A relay inside the LU50 can be used in a failsafe design of your system. When [SAF1] is set, the relay will deenergize when the acoustic return signal is LOST. When [SAF2] is set, the relay will energize when the acoustic return signal is LOST.

Response times will vary according to the setting of the LU50

([FAST] or [SLOW] modes).

FAST/SLOW: FAST and SLOW sets the reaction time for the

SAF1/2 setting. [FAST] is the typical setting for the LU50 to operate.

The time for the RELAY to default is 30 seconds for the [FAST] mode and 2.5 minutes for the [SLOW] mode.

ALIN: Indicates that the unit is in the Alignment mode. Display will show the return signal strength in dB’s. Used as an indicator for mechanical alignment of the LU50 and/or signal attenuation. Typical readings range between 2 and 60 dB’s. For optimum alignment, first energize the unit and receive a valid return signal. Then select the

ALIN mode and adjust the LU50 until the value is maximized.

ON/OFF: Actual setting for ALIN mode. The ALIN mode must be turned

[OFF] when alignment is completed.

This mode will not automatically default back to [LEVL].

TANK: Used as an indication for

[TANK] or maximum range. The TANK sets the maximum tank height and will filter out all acoustic signal returns greater than this value.

TANK

(value): Actual TANK setting. The maximum distance is 480.0 inches.

PROGRAMMING

Step Four

EC4:

1. Hold [MENU] key until EC4 appears in display.

2. Release [MENU] key and wait until a value appears. This value is the current measured level value.

3. If this is acceptable, press [SET] to lock the value as the new EC4 set point. If not, press either the [ s] or [t] keys once and the old setting for the EC4 will appear.

4. From here, use the [ s] or [t] keys to raise or lower the value to the desired value.

5. Press the [SET] key to enter this value as the new EC4 set point.

EC20:

1. Hold [MENU] key until EC20 appears in display.

2. Release [MENU] key and wait until a value appears. This value is the current measured level value.

3. If this is acceptable, press [SET] to lock the value as the new

EC20 set point. If not, press either the [ s] or [t] keys once and the old setting for the EC20 will appear.

4. From here, use the [ s] or [t] keys to raise or lower the value to the desired value.

5. Press the [SET] key to enter this value as the new EC20 set point.

HSET/LSET:

1. Hold [MENU] key until HSET or LSET appears in the display.

2. Release [MENU] key wait for the display to change to a number.

3. From here, use the [ s] or [t] keys to raise or lower the value to the desired value.

4. Release all buttons and the value will be entered into memory. The

[SET] button does not need to be pressed.

5. Repeat process for the other setting.

SAF1/SAF2:

1. Hold [MENU] key until SAF1 or SAF2 appears in the display.

2. Release [MENU] key and hold [SET] key to toggle between

SAF1 and SAF2.

3. When desired setting is reached, release [SET] key. The last displayed setting will be locked into memory. To change, start again at step 1.

FAST/SLOW:

1. Hold [MENU] key until FAST or SLOW appears in the display.

2. Release [MENU] key and hold [SET] key to toggle between

FAST and SLOW.

3. When desired setting is reached, release [SET] key. The last displayed setting will be locked into memory. To change, start again at step 1.

ALIN:

1. Hold [MENU] key until ALIN appears in the display.

2. Continue to hold [MENU] key until OFF appears in the display.

3. Release [MENU] key and hold [SET] key to toggle from OFF to

ON.

4. Release [SET] key. The LU50 is now in ALIN mode.

5. To exit ALIN mode, repeat steps 1-4 changing from ON to OFF.

TANK:

1. Hold [MENU] key until TANK appears in the display.

2. Continue to hold [MENU] key until a value appears in the display.

This value is the current TANK setting.

3. If this is acceptable, press [SET] to lock the value as the TANK setting. If not, use the [ s] or [t] keys to raise or lower the value to the desired setting.

4. Press the [SET] key to enter this value as the new TANK setting.

WIRING

Step Five

The LU50 requires 14-36 VDC power with at least a 200 mA supply in order to operate.

1. Wiring to a FLOWLINE Continuous Controller (Model LC52):

( + ) - R e d

( - ) - B l a c k

S i g n a l - W h i t e

C O M - B l u e

N . C .

- G r e e n

N . O .

- Ye l l o w

P W R LATCH

R E L AY 1

ON OFF INVERT

DELAY

R E L AY 2

INVERT

DELAY

0% INPUT 100%

E A S Y CAL

4 20 OP

UP DOWN SET

S e e L C 5 2 - 1 0 0 1

I n s t r u c t i o n M a n u a l

2. Wiring to a Two-Wire Loop Indicator (LU50-70_4 only):

( + ) - R e d

( - ) - B l a c k

S i g n a l - W h i t e

C O M - B l u e

N . C .

- G r e e n

N . O .

- Ye l l o w

DC Power

Supply

14-36 VDC

200 mA min.

+ +

3. Wiring to a Two-Wire Loop Indicator (LU50-70_3 only):

( + ) - R e d

( - ) - B l a c k

S i g n a l - W h i t e

C O M - B l u e

N . C .

- G r e e n

N . O .

- Ye l l o w

DC Power

Supply

14-36 VDC

200 mA min.

+ +

4. Wiring to a PLC (LU50-70_4 only):

( + ) - R e d

( - ) - B l a c k

S i g n a l - W h i t e

C O M - B l u e

N . C .

- G r e e n

N . O .

- Ye l l o w

DC Power

Supply

14-36 VDC

200 mA min.

+ 3

2

1

0

A

6

5

4

5. Wiring to a PLC (LU50-70_3 only):

( + ) - R e d

( - ) - B l a c k

S i g n a l - W h i t e

C O M - B l u e

N . C .

- G r e e n

N . O .

- Ye l l o w

DC Power

Supply

14-36 VDC

200 mA min.

+ -

2

1

0

A

6

5

4

3

INSTALLATION

Step Six

Flange Mounting:

Flange mounting of the LU50 should be done in accordance with all applicable ANSI or DIN installation standards.

Flange Riser Compatibility:

The LU50 should not be installed in flange risers that are tall enough to interfere with the acoustic signal path. The chart below indicates the maximum height at which the LU50 can be installed based on the flange riser ID. For example, if the flange riser ID is 4”, then the flange riser height should be no more than 7”. The flange riser height is defined as the distance from the bottom of the transducer to the opening in the tank.

Flange Riser

I.D.

(Inches) (cm)

Height

(Inches) (cm)

3 7.6

4 10.2

5 12.7

6 15.2

7 17.8

8 20.3

3 7.6

7 17.8

11 27.9

15 38.1

19 48.3

26 66.0

Height

I.D.

Avoid interference from side of tank

Do not install

LU50 at an angle

INSTALLATION

Step Seven

Factory Settings:

The LU50 sensor is preset at the factory. When powering up the sensor the first time, the factory settings will be active. If at any time in you need to return to these settings, remove power from the sensor and wait 10 seconds. Press the [Set] and [Menu] buttons simultaneously while powering up the sensor.

LEVL

EC 4

EC20

RLAY

HSET

LSET

INCHES (cm)

480" (1219 cm)

18" (45.7 cm)

N/A

18" (45.7 cm)

SAF1/2

F/S

ALIN

OFF/ON

TANK

480" (1219 cm) value

SAF1

FAST

N/A

OFF

N/A

480" (1219 cm)

Avoid interference from obstructions in tank

LU50 will not operate in vacuum

VACUUM

Maximum Application Range:

The LU50 maximum range of Echotouch™ is 40.0 feet. Yet a number of factors can reduce the overall quality of signal return and shorten the accurate range of the transmitter. To determine the maximum application range of the product, follow the signal return formula against the echo attenuation graph below.

Echo Attenuation Range:

50

40

30

20

2

IDEAL

CUR

VE

10 dB

ABSORPTION

EXAMPLE:

• OPTIMIZE ALIGNMENT

1: Distance from transducer = 80"

2: Highest possible ALIN = 35dB

(under ideal conditions)

Adjust mechanical alignment of unit to maximize displayed ALIN value

• PREDICT MAXIMUM RANGE

USING ALIGN VALUE

3: If the actual ALIN = 15dB at D = 80"

4: Maximum Range = 272"

3

10

20 dB

ABSORPTION

00

1 4

80 160 240 320 400

DISTANCE FROM FACE OF TRANSDUCER (inches)

480

13

14

15

16

17

8

9

10

11

12

Depth Radius Radius

(Feet) (Inches) (cm)

1

2

1.59

2.43

4.04

6.17

5

6

3

4

7

3.27

4.11

4.95

5.78

6.62

8.30

10.43

12.56

14.69

16.82

18

19

20

7.46

8.30

9.14

9.98

18.96

21.09

23.22

25.35

10.82

27.48

11.66

29.61

12.50

31.74

13.34

33.88

14.18

36.01

15.02

38.14

15.85

16.69

17.53

40.27

42.40

44.53

Radius

31

32

33

34

35

26

27

28

29

30

Depth Radius Radius

(Feet) (Inches) (cm)

21

22

23

24

25

18.37

19.21

20.05

20.89

21.73

46.66

48.80

50.93

53.06

55.19

36

37

38

39

40

22.57

23.41

24.25

25.08

25.92

30.96

31.80

32.64

33.48

34.31

57.32

59.45

61.58

63.71

65.85

26.76

67.98

27.60

70.11

28.44

72.24

29.28

74.37

30.12

76.50

78.63

80.77

82.90

85.03

87.16

INSTALLATION

Step Eight

Internal Relay:

The LU50 contains a 250 VAC, 10A, 1/2 Hp internal relay. The relay is actuated by the HSET and LSET settings. While this manual offers some examples and suggestions to help explain the operation of the relay, such examples are for information only and are not intended as a complete guide to installing any specific system.

High Level Alarm:

The goal is to make sure the liquid does not rise above a

N C - G r e e n

C O M - B l u e

N O - Ye l l o w certain point. If it does, an alarm sounds alerting the operator to a high level condition. Wire the hot lead of the alarm to the

Green NC relay wire. Also make sure the HSET and LSET settings are programmed correctly.

Typically the values are set at the same distance away from the LU50. In the normal operation state, the LU50’s relay will remain energized, keeping the alarm circuit open.

When the alarm level has been reached, the relay de-energizes and activates the alarm. To change to a low level alarm, re-wire the alarm from the Green NC wire to the Yellow NO wire.

HSET

LSET

De-Energized

Relay

Energized Relay

Automatic Fill:

The goal is to fill the tank. A N C - G r e e n valve is opened (energized) when a low level is reached

C O M - B l u e

N O - Ye l l o w and closed (de-energized) when a high level is reached. Wire the hot lead of the valve to the

Yellow NO relay wire. Make sure the HSET and

LSET settings are programmed correctly.

Typically the values are set with the HSET as the valve close and the LSET as the valve open. A pump or solenoid can be substituted for the exact same operation. When the low level is reached, the system will start to fill the tank. The tank will continue to fill until the level reaches the high point. The system stops filling until the low level is reached again. To change to an automat-

ic empty application, re-wire the system from the Yellow NO wire the the Green

NC wire.

HSET

De-Energized

Relay

LSET

Energized Relay

MAINTENANCE

Step Nine

LOST Signal:

A reading of LOST in the display of the LU50 indicates the transmitter is not receiving a valid acoustic return signal. If LOST appears, please check the following troubleshooting items:

1. Beam cone interference such as the side wall, ladders, seams, rungs or pipes within the LU50's acoustic signal path.

2. Proper installation such that the LU50 is installed level and free from interference from the installation flange.

3. Sufficient power being supplied to the LU50. The LU50 requires

14-36 VDC power with a minimum supply of 200 mA.

4. Proper programming of the TANK function. The TANK function is often set as the distance from the bottom of the tank to the bottom of the transmitter.

5. Make sure that the transmitter is not installed at an angle. Even a

3 degree offset can reduce the signal return strength greatly.

Current is always 4mA or 20 mA:

If the output of the LU50 is always reading 4mA or 20 mA, check the input values for the LU50. The display of the LU50 reads to the 1/10 of an inch. A display of 1234 is 123.4" and not 1234".

EC4 and EC20 Set Points:

When checking the EC4 and EC20 set points, the first value which appears after EC4 or EC20 is the current distance from the bottom of the transmitter to the surface of the liquid. Pressing either the [ s] or

[ t] buttons will then show the actual set point in memory.

General:

The LU50 sensor itself requires no periodic maintenance except cleaning as required. It is the responsibility of the user to determine the appropriate maintenance schedule, based on the specific characteristics of the application.

Cleaning Procedure:

1.

Power: Make Sure that all power to the sensor, controller and/or power supply is completely disconnected.

2.

Sensor Removal: In all through-wall installations, make sure that the tank is drained well below the sensor prior to removal.

Carefully, remove the sensor from the installation.

3.

Cleaning the Sensor: Use a soft bristle brush and mild detergent, carefully wash the LU50 sensor. Do not use harsh abrasives such as steel wool or sandpaper, which might damage the surface sensor. Do not use incompatible solvents which may damage the

LU50's Polypropylene or PVC plastic body.

4.

Sensor Installation: Follow the appropriate steps of installation as outlined in the installation section of this manual.