Gems Sensors & Controls UCL-520 Operating Manual

WARRANTY

Gems Warranty

Gems 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.

Gems’ obligation under this warranty is solely and exclusively limited to the
repair or replacement, at Gems’ option, of the products (or components
thereof) which Gems’ examination proves to its satisfaction to be defective.
Gems SHALL HAVE NO OBLIGATION FOR CONSEQUENTIAL DAMAGES
TO PERSONAL OR REAL PROPERTY, OR FOR INJURY TO ANY PERSON.

This warranty does not apply to products which have been subject 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 Gems’ 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 Gems attempts to repair the defective products.
Equipment sold by Gems Sensors Inc. not intended for use in a nuclear
installation, nor shall it be used as a “Basic Component” as same as defined
under Part 21, Title 10 of the Code of Federal Regulations. In the event
of such use, you agree to indemnify and hold us harmless from any and all
subsequent liabilities and responsibilities which might arise in connection
with such use.

Warranty, Service & Repair

UCL-520 Two-Wire
Ultrasonic Level Transmitter
Owner’s Manual

Part Number 225200

I

P

67

Version C
© 2008 Gems Inc.
All rights reserved.
Manual # 226009

Return Policy

Returns are accepted on stock items up to 30 days from date of order.
You must contact our Returns Department for a Return Authorization (RA) number. Return the goods – freight prepaid – in the original container and include
original packing slip. C. O. D. returns are not accepted. Gems reserves the right to apply restocking charges.

Gems further reserves the right to unilaterally waive this warranty and to dispose of any product returned to Gems where:

a. There is evidence of a potentially hazardous material present with or on the product.
b. The product has remained unclaimed at Gems for longer than 30 days after dutifully requesting disposition of the product from the Customer.

THERE ARE NO WARRANTIES WHICH EXTEND BEYOND THE DESCRIPTION ON THE FACE OF THIS WARRANTY. This warranty and the obligations and li­abilities of Gems 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 PARTICULAR PURPOSE OR USE AND THE
IMPLIED WARRANTY OF MERCHANTABILITY OF THE PRODUCTS.

Important Points:

• Gems products must be maintained and installed in strict accordance with the National Electrical Code and the applicable Gems product instruction Bul­letin that covers installation, operation and proper maintenance. Failure to observe this information may result in serious injury or damages.

• The supply voltage to the sensor should not exceed 36 VDC, Max.

• Please adhere to the pressure and temperature limitations shown. These limitations must not be exceeded. These pressures and temperatures take into
consideration possible system surge pressures/temperatures and their frequencies.

• Selection of materials for compatibility with the media is critical to the life and operation of Gems products. Take care in the proper selection of materials
of construction, testing is required.

• Avoid over tightening when mounting.

• Life expectancy of switch contacts varies with application. Contact Gems if life cycle testing is required.

• Ambient temperature changes do affect switch set points, since the gravity of a liquid can vary with temperature.

• Our sensors have been designed to resist shock and vibration. However, shock and vibration should be minimized.

• Electrical entries and mounting points in an enclosed tank may require liquid/vapor sealing.

• Our sensors must not be field-repaired.

• Physical damage sustained by product may render it unserviceable.

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

SPECIFICATIONS

40

30

20

10

00

-40 -20 00 20 40 60 80

Acceptable

Range

Unacceptable

Range

Temperature/Pressure Derating

Operating Pressure (psi)

Temperature ( C)

12 16 20 24 28

Unacceptable

Range

Maximum Loop Resistance

Max. Series Resistance (Ohms)

Supply Voltage (VDC)

1,000

800

600

400

200

000

- Enhanced
Performance

- Specified
Performance

- Limited
Performance

5.2"

(133 mm)

3.8"

(96 mm)

4.1"

(104 mm)

3.4"

(88 mm)

5.5"

(138 mm)

4.0"

(100 mm)

2" NPT

(2" G)

5.2” (133mm)

2.7"

(69 mm)

Step One

Range: 8” to 26.2’ (20 cm to 8 m)
Accuracy: +/- 0.2% of span in air
Resolution: 0.039" (1 mm)
Beam width: 3” (7.6 cm) dia.
Dead band: 8” (20 cm)
Display type: LCD, 6-digit
Display units: Inch, cm or percentage
Display mode: Air gap or liquid height
Memory: Non-volatile
Supply voltage: 12- 28 VDC
Loop resist,: 500 Ohms @ 24 VDC
Signal output: 4 - 20 mA, two -wire
Signal invert: 4-20 mA, 20-4 mA
Calibration: Push button
Fail-safety: Selectable: 4 mA, 20 mA, 21 mA,
22 mA or hold last value
Process temp.: F: -4° to 140°
C: -20° to 60°
Temp comp,: Automatic
Electronics temp.: F: -40° to 160°
C: -40° to 71°
Pressure: 30 psi (2 bar) @ 25 °C., derated @

1.667 psi (113 bar) per °C, above 25 °C
Enclosure rating: NEMA 4X (IP65)
Enclosure vent: Water tight membrane
Encl. material: PC/ABS FR
Trans. material: PVDF
Process mount: 2” NPT (2” G)
Mount. gasket: Viton®
Conduit entrance: Dual, 1/2” NPT
Classification: General purpose
CE compliance: EN 61326 EMC

Side View

Top View

SELECT / FAST

Button

To activate the top

menu, press and
hold SELECT / FAST
button for 5 seconds

DISPLAY

TOP MENU

UNITS TANK SAFE TGCAL VALUES RUN

SELECT

Display Units

Inches

Centimeters

Percentage

Display

SELECT

4-20 Span

Height (4 mA)
Fill H (20 mA)

Rev mA

Help

SELECT

Fail-Safety

22 mA
21 mA
20 mA

4 mA

Hold

SELECT

Target-Cal

FULL

EMPTY

Help

SELECT

Diagnostics

Setup

Diagnostics

Reset

HELP

SELECT

Diagnostics

Contact

SAFETY

Step Two

OVERVIEW

Step Three

About this Manual: PLEASE READ THE ENTIRE MANUAL

PRIOR TO INSTALLING OR USING THIS PRODUCT. This

manual includes information on the UCL-520 Ultrasonic Level

Transmitter from Gems. Please refer to the part number located on

the transmitter label to verify the exact model configuration which

you have purchased.

User’s Responsibility for Safety: Gems manufactures a

broad range of level sensing technologies. While each of these sen-

sors 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 properly trained

staff should install and/or repair this product. Install the transmitter

with the Viton gasket and never overtighten the transmitter within

the fitting. Always check for leaks prior to system start-up.

Wiring and Electrical: A supply voltage (loop power) of 12

-28 VDC is used to power the UCL-520 transmitter. The sensor

circuit should never exceed a maximum of 28 volts DC. Electrical

wiring of the sensor should be performed in accordance with all

applicable national, state, and local codes.

A. Application: The general-purpose ultrasonic transmitter pro-

vides non-contact level detection up to 26.2' or 8 m. The transmitter

is well suited for a wide range of corrosive, waste and slurry type

media, and is broadly selected for atmospheric bulk storage, day tank

and waste sump applications.

B. Part Number: The part and serial numbers are located on the

wrench flat. Check the part number on the product label and confirm

which of the below model configurations you have purchased:

Part Number Range Supply Mount

UCL-520 26.2’ (8 m) 12-28 VDC 2” NPT

C. NEMA 4X Enclosure: The NEMA 4X (IP65) enclosure has

a flip cover with two 1/2” NPT female conduit ports and an internal

terminal strip for wiring. To open the enclosure, you will need a small

small screwdriver. Insert the tool into the hole located at the top edge

of the enclosure and turn counter-clockwide. Rotate the hinged cover

up for 135° access to the faceplate screen and terminal strip.

Material Compatibility: The UCL-520 transmitter enclosure

is made of a flame retardant Polycarbonate (PC/ABS FR). The

transducer is made of Polyvinylidene Fluoride (PVDF). Make sure

that the model which you have selected is chemically compatible

with the application media and it’s environment.

Enclosure: While the transmitter housing is liquid-resistant the

UCL-520 transmitter 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.

Make a Fail-Safe System: Design a fail-safe system that

accommodates the possibility of transmitter and/or power failure.

Gems recommends the use of redundant backup systems and

alarms in addition to the primary system.

Flammable, Explosive or Hazardous Applications:

Do not use the UCL-520 transmitter of general purpose transmit-

ters within classified hazardous environments.

Warning

Always use the Viton gasket when installing the UCL-520 trans­mitter in its fitting, and always connect the shield wire to the
common ground.

Closed

Before closing the enclosure, make sure that the enclosure gasket is
properly seated, and that any conduit fittings, liquid tight cable con­nectors and/or plugs are properly installed and sealed.

Open

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 technicians 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.