Dwyer Instruments UL series Specifications-installation And Operating Instructions

Series UL Transmitters

Specifications - Installation and Operating Instructions

Bulletin L-UL

DWYER INSTRUMENTS, INC.

P.O. BOX 373 • MICHIGAN CITY, INDIANA 46361, U.S.A. Fax: [phone] e-mail: [e-mail]

Phone: [phone] www.dwyer-inst.com

Table of Contents

Table of Figures

Chapter 1. Introduction

Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2

Measuring Ranges . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2

Chapter 2. Installation

Precautions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3

Installing the Unit on Threaded Flange/Thread-Free Flange . . . . . . . . . . . . . . . .3

Installing the Unit via Extension Pipes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4

Using a Conduit Adapter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4

Non-Intrinsically Safe Connections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4

Power Supply and Load Resistance Recommendations . . . . . . . . . . . . . . . . . . .4

Chapter 3. Set Up

Series UL Functions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5

Set Up and Function Access . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5

Resetting the Unit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6

Entering Distance to Empty Level (Tank Height) . . . . . . . . . . . . . . . . . . . . . . . . . .6

Defining Interfering Signals . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6

Configuring 4 mA Current Output . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .7

Configuring 20 mA Current Output . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .7

Selecting Low/High Dynamic Speed . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .8

Defining Working Area . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .8

Selecting Distance or Level Display . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .8

Entering Factor for Gas Compensation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .9

Restoring the Default Settings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .9

Shifting the Blocking Distance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .9

Verifying the Version Number . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .9

Defining 22 mA Signal Error Messages . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .10

Chapter 4. Open Channels (ULF)

Selecting the Flow Measurement Settings . . . . . . . . . . . . . . . . . . . . . . . . . . . . .10

Open Channel Flow Measurements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .10

Flume/Weir Types . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .11

Flumes/Weirs - European Standard . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .11

Rectangular Suppressed Sharp - Crested Weir (Type 1) . . . . . . . . . . . . . . . . . .11

Rectangular Contracted Sharp - Crested Weir (Type 2) . . . . . . . . . . . . . . . . . . .11

Trapezoidal (Cipolletti) Sharp - Crested Weir (Type 3) . . . . . . . . . . . . . . . . . . . .11

V-Notch (Triangular) Sharp - Crested Weir (Type 4) . . . . . . . . . . . . . . . . . . . . . .11

Khafagi-Venturi Flume (Type 5) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .12

Parshall Flume (Type 6) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .12

Palmer Bowlus Flume Trapezoidal Throat Cross-Selection (Type 7) . . . . . . . . .12

H Flume (Type 8) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .12

Neyrpic Venturi Flume/Long-Base Weir (Type 9) . . . . . . . . . . . . . . . . . . . . . . . .13

Flumes/Weirs – American Standard . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .13

Rectangular Suppressed Sharp - Crested Weir (Type 1) . . . . . . . . . . . . . . . . . .13

Rectangular Contracted Sharp - Crested Weir (Type 2) . . . . . . . . . . . . . . . . . .13

Trapezoidal (Cipolletti) Sharp - Crested Weir (Type 3) . . . . . . . . . . . . . . . . . . . .13

V-Notch (Triangular) Sharp - Crested Weir (Type 4) . . . . . . . . . . . . . . . . . . . . . .13

Parshall Flume (Type 5) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .14

Palmer Bowlus Flume Trapezoidal Throat Cross-Selection (Type 6) . . . . . . . . .14

H Flume (Type 7) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .14

Leopold-Lagco Flume (Type 8) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .14

Figure 1: Front and Side View . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2

Figure 2: Threaded Flange/ Thread - Free Flange Monitoring . . . . . . . . . . . . . . . . .3

Figure 3: Extension Pipe Recommendation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4

Figure 4: Conduit Adapter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4

Figure 5: Non-Intrinsically Safe Positive Ground Connection . . . . . . . . . . . . . . . . . .4

Figure 6: Non-Intrinsically Safe Negative Ground Connection . . . . . . . . . . . . . . . . .4

Figure 7: Functions Menus . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5

Figure 8: Display and Function Buttons . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5

Figure 9: Scan Distance Process . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6

Figure 10: Defining Working Area . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .8

Figure 11: Rectangular Suppressed Sharp - Crested Weir . . . . . . . . . . . . . . . . . . .11

Figure 12: Rectangular Contracted Sharp - Crested Weir . . . . . . . . . . . . . . . . . . . .11

Figure 13: Trapezoidal (Cipolletti) Sharp - Crested Weir . . . . . . . . . . . . . . . . . . . . .11

Figure 14: V-Notch (Triangular) Sharp - Crested Weir . . . . . . . . . . . . . . . . . . . . . . .11

Figure 15: Khafagi-Venturi Flume . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .12

Figure 16: Parshall Flume . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .12

Figure 17: Palmer Bowlus Flume Trapezoidal Throat

Cross-Selection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .12

Figure 18: H Flume . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .12

Figure 19: Neyrpic Venture Flume . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .13

Figure 20: Long-Base Weir . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .13

Figure 21: Rectangular Suppresses Sharp - Crested Weir . . . . . . . . . . . . . . . . . . .13

Figure 22: Rectangular Contracted Sharp - Crested Weir . . . . . . . . . . . . . . . . . . .13

Figure 23: Trapeziodal (Cipolletti) Sharp - Crusted Weir . . . . . . . . . . . . . . . . . . . . .13

Figure 24: V-Notch (Triangular) Sharp - Crested Weir . . . . . . . . . . . . . . . . . . . . . . .13

Figure 25: Parshall Flume . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .14

Figure 26: Palmer Boweus Flume Trapezoidal Throat

Cross-Selection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .14

Figure 27: H Flume . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .14

Figure 28: Leopold Lagco Flume . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .14

Figure 29: Nomenclature . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .17

Chapter 5. Troubleshooting

22 mA Signal Error Messages . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .15

Appendix A – Gas Factor Table . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .16

Appendix B – Installation Tips . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .16

Appendix C – Nomenclature . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .17

Page 1

Chapter 1: Introduction

The UL is an ultrasonic, continuous-level measurement gage. The unit is available
in two separate series: The Series ULB for solids and the Series ULF for fluids.

Depending on the series, the unit can be used for the following measurement tasks:

• Dust-free tanks with solids

• Open channel flow

• Liquid tanks with calm surfaces (upon request)

The ULF unit has a range of up to 49.21 ft (15 m) with an accuracy of 0.25% of the
maximum measuring range (version dependent).
The ULB unit has a range of up to 28 ft (8.5 m) with an accuracy of 0.25% of the
maximum measuring range (version dependent).

SPECIFICATIONS
Service: ULB: Bulk solids, ULF: Compatible liquids.
Wetted Materials: Sensor: Polypropylene, Acoustic Window: ECTFE.
Ranges: (see “Measuring Ranges”).
Accuracy: 0.25% of max range (at 20°C).
Resolution: 0.04˝ (1 mm).
Blind Zone: ULB-11 and ULF-X1-XXX: 0.8 ft (.25 m); ULB-12 and ULB-X2-XXX:

1.96 ft (0.6 m).

Beam Angle: 5° @ 3db point.
Temperature Limits: -40 to 158°F (-40 to 70°C).
Temperature Compensation: Automatic.
Pressure Limits: 13.5 psi (0.9 bar) to 30 psi (2 bar).
Power Requirement: 18 to 28 VDC.
Output Signal: 4 to 20 mA.
Max. Loop Resistance: 750 Ω at 28 VDC.
Electrical Connection: Screw terminal.
Conduit Connection: 1/2˝ NPT conduit or cable gland (optional).
Process Connection: 2˝ NPT or 2˝ BSP (optional).
Enclosure: Plastic enclosure: ABS and UV resistant body.
Enclosure Rating: NEMA 4 (IP65).
Mounting Orientation: Vertical.
Memory: Non-volatile.
Display: 4 character LCD.
Units: ft, m (upon request).
Programming: 4 button.
Weight: 3.1 lb (1.4 kg).

Measuring Ranges

Standard

ULB for solids

Extended
Range

0.82 ft to 11.5 ft

0.25 m to 3.5 m

1.96 ft to 28 ft

0.6 m to 8.5 m

Figure 1 : Front and Side View

ULF for fluids

Short
Range

Standard

0.82 ft to 16.4 ft

0.25 m to 5 m

1.96 ft to 49.2 ft

0.6 m to 15 m

Page 2

Chapter 2: Installing the Unit

Precautions

• Ensure that the unit is mounted in an area that meets the stated temperature,
pressure and technical specifications.

• Ensure that high-voltage sources or cables are at least 40˝ (1 m) away from the
sensor and its cable.

• Use round cables with minimum diameter of 0.24 to 0.28˝ (6 to 7 mm) to ensure
that the unit remains sealed per IP65 standards.

• Ensure that cables are routed correctly and tightened along walls or pipes.

• Installation and operation of this product should be performed, according to the
Product User Manual and Product Certification. Otherwise the use of this product
is prohibited.

When installing the unit ensure that it is:

• Mounted above the dead-zone area.

NOTE: If the device enters the blocking distance (dead
zone), it will not measure correctly.

• Positioned at least 1.64 ft (0.5 m) away from the tank walls.
Add 4˝ (10 cm) spacing for each 40˝ (1 m) in range.

Installing the Unit on Threaded Flange/Thread-Free Flange

The unit is available in 2˝ NPT or 2˝ BSP (upon request).

The unit can be installed with threaded-flange mounting or with thread-free flange
mounting, as shown below:

Figure 2: Threaded Flange/Thread-Free Flange Mounting

NOTE: When installing a thread-free flange mounted unit, you will need a 2˝

(50.8 mm) locking nut to secure the unit inside the tank.

To Install the Unit:

1. Insert the threaded end of the unit into the opening at the top of the tank or pipe.

2. Bolt the unit into place in one of the following ways:

• Threaded-flange mounting: Screw the unit into a flange with a threaded
2˝ (50.8 mm) hole.

• Thread-free mounting: Place the unit in the flange, and bolt it from within
the tank with a 2˝ (50.8 mm) locking nut.

• Perpendicular to the surface of the target.
NOTE: Even the slightest difference in angle may affect echo
quality.

• Placed as far as possible from noisy areas, such as a filling
inlet.

NOTE: When installed in a humid environment it is
recommended to position the sensor on a tripod on top of the
vessel.

NOTE: Tighten nut hand tight only. When tightening the nut, hold the lower part of
the unit. Make sure that the seal is leak proof.

Page 3

Installing the Unit Via Extension Pipes

If the level of the measured surface falls within the dead-zone area, you should use
an extension pipe to mount the unit.

When using an extension pipe, ensure that:

• The sensor is positioned in the center of the pipe.

• The pipe extension is exactly perpendicular to the surface
of the target.

• The internal pipe diameter is at least 3.0˝ (76.2 mm) wide.

• The pipe is preferably made of plastic and must have a
smooth interior surface.

• The pipe should not protrude inside the tank.

• The tank drilling should be at least the size of the internal
pipe diameter and have a smooth edge.

When installing the unit with extension pipes, measure from sensor’s lower edge
and follow these specifications:

Non-Intrinsically Safe Connections

Figure 5: Non-Intrinsically Safe Positive Ground Connection

Pipe Length

1.64 ft (0.5 m)

NOTE:

1. It is always recommended to use interference signal feature (Pr03) to locate

interfering signals when using an extension pipe.

2. The sensor's lower edge may be

a) aligned with the extension pipe's upper edge or
b) protrude it by up to 2.56˝ (6.5 cm). See Figure 3 below:

Using a Conduit Adapter

1. Remove the four retaining screws from the conduit adapter cover.

2. Pull the electrical wires through the 1/2˝ NPT conduit connection.

3. Connect the -24 V wire to Terminal 1, connect the +24 V wire to Terminal 2 on

the wiring block.

4. Return the adapter's cover to its place properly. Make sure that the O-ring is

placed correctly. Fasten the four retaining screws.

Internal Pipe Diameter

≥ 3.0˝ (76.2 mm)

a

Figure 3: Extension Pipe Recommendation

b

Figure 6: Non-Intrinsically Safe Negative Ground Connection

Power Supply and Load Resistance Recommendations

The following table specifies the recommended resistance range for each power
supply voltage (Non-Intrinsically Safe).

Power Supply
Voltage

15 V
18 V
24 V
28 V

NOTE: The resistance value is the total sum of the series resistor (or PLC
resistance) and the lines resistance. The minimum voltage level on terminals
should not be less that 15 VDC.

To maintain a proper seal, make sure that conduit is firmly screwed to the conduit's
adaptor.

Ripple/Noise Parameters Recommended for the Power Supply

The following ripple/noise parameter are recommended for the power supply:

• 100 mV p-p max.

Power Supply Types Recommendations

• Prefer a regulated switching power supply.

• A rectified power supply is not recommended.

• When powering by a battery, avoid the using of switched charger.

Minimum
Resistance Value

0 Ω
0 Ω
41 Ω
68 Ω

Maximum
Resistance Value

136 Ω
272 Ω
545 Ω
727 Ω

Figure 4: Conduit Adapter

NOTE: The conduit adapter should not exceed a torque of 50 lb-in.

To maintain a proper seal, make sure that conduit is firmly screwed to the conduit's
adaptor.

Feeding Via PLC

• Verify that the voltage level on the unit’s terminals is at least 15 VDC.

• Check PLC specifications for grounding options.

• It is good practice to add a 150 Ω series resistor between the unit's positive
terminal and the PLC.

Page 4

Chapter 3: Setting Up and Calibrating the Unit

This chapter explains how to set up and calibrate the unit for accurate
measurement monitoring.
The unit is supplied with preprogrammed default settings, making it ready for
immediate operation. There is no need to change the default settings, unless you
wish to calibrate the unit for your specific requirements; however, it is
recommended that you replace the default tank height value with the actual tank
height, as described on page 6. When using the unit, the tank height is calculated
as the distance from the surface of the sensor to the bottom of the tank. You should
enter this value whenever tank height is required. (For flow measurement, enter the
precise flume height.)

The ULF unit contains eleven programs and the ULB unit contains nine programs.
These programs are referred to as functions, which enable you to change the
default settings and calibrate as required. These functions are accessed from a
functions menu. The functions Pr01, Pr02, Pr04 and Pr05 are the most important
to ensure correct usage of your device (with the addition of Pr00 if using the
appropriate ULF series). Function Pr03 may be used if there are interfering signals.
The remaining functions (Pr06, Pr07, Pr08, Pr09 and Pr10) enable you to
customize the unit for your monitoring requirements or to restore factory default
settings.

The diagram below shows the functions available in the functions menus for the
Series ULF and Series ULB. Some functions are only relevant for particular series.

Using Series UL Functions

The LCD display screen, functioning in "normal" mode, provides continuously
updated measurement readings. The display screen is also used to view the
menu options, function settings and data values, accessed by using the function
buttons.

The picture below shows the upper part of the unit.

Figure 8: Display and Function Buttons

The function buttons are used to perform various operations, summarized in the
following table.

Button

Uses Include:

• Accessing the functions menu (when pressed

simultaneously with )

• Selecting functions

• Progressing to the next step of a function

• Moving from left to right between displayed digits

• Saving changes to data

• Accessing the functions menu (when pressed
simultaneously with )

• Exiting the functions menu to restore the
distance reading

• Moving from right to left between displayed digits

• Exiting a function without saving changes

• Clearing error messages

• Scrolling through the functions menu

• Scrolling through available data values in
functions

• NEXT button only: Recording interfering signals

or

Figure 7: Function Menus

Setting flow measurement parameters (function Pr00) for the Series ULF (Open
Channels) is described in Chapter 4, Open Channels (ULF). Setting parameters
for all other functions and accessing the functions are described in this chapter.

NOTE: Within some functions, the digits in the displayed value can be individually
modified. This is indicated by a flashing digit (flashing digits are shown in gray in
the display illustrations. In this case, the ENT and ESC buttons enable you to move
between the digits. Each flashing digit can be modified using the BACK and NEXT
buttons.

Start Up and Function Access:

Page 5

Press/Action

Connect unit to
power supply

After a brief pause

and

(simultaneously)

or

Display:

For example:

For example:

Explanation

Temporary display while
unit takes a reading.

Distance reading.

Enters the functions
menu.

Used to search for the
required menu selection.

Accesses the selected
function.