Kenco KUSG Series Installation & Operation Instructions

Ultrasonic switch

KENCO ENGINEERING COMPANY

P.O. BOX 470426 TULSA, OK 74147-0426

PHONE: (918) 663-4406 FAX: (918) 663-4406

www.kenco-eng.com e-mail: info@kenco-eng.com

MODEL KUSG ULTRASONIC SWITCH

INSTALLATION / OPERATION INSTRUCTIONS

GENERAL DESCRIPTION

The KUSG Series Ultrasonic Level Switches are ideal, low cost solutions for many liquid level control applications. They

operate in a wide variety of services.

Ultrasonic switches use piezoelectric crystals to transform electrical energy into mechanical motion (sound). The

Transmit Crystal sends a pulse of sound through the space between the crystals, to the Receive Crystal. If the space is

filled with air, gas, or vacuum, the Receive Crystal does not detect the sound pulse. However, if the space is filled with

liquid, any liquid, the pulse is detected by the Receive Crystal, and the switch output changes.

MODEL DESCRIPTION

Unpack the switch carefully. Inspect all units for damage. Report any damage to carrier immediately. Check the

contents against the packing slip and purchase order.

Kenco's Ultrasonic Switches are manufactured to the highest quality standards. These switches use electronic

components that can be damaged by static electricity. Make sure that you are properly grounded before starting

installation. Insure that all electrical connections are properly made, and that there are no "floating" connections.

Table of Contents

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Page 1 MODEL KUSG ULTRASONIC SWITCH INSTALLATION / OPERATION INSTRUCTIONS GENERAL DESCRIPTION The KUSG Series Ultrasonic Level Switches are ideal, low cost solutions for many liquid level control applications. They operate in a wide variety of services. PRINCIPLE OF OPERATION Ultrasonic switches use piezoelectric crystals to transform electrical energy into mechanical motion (sound). The Transmit Crystal sends a pulse of sound through the space between the crystals, to the Receive Crystal.
Page 2 Operational Check Before installing the switch a simple operational check should be performed, as follows: 1. Fill a container with water 2. Open the electronics housing cover and connect power (see section on “Wiring”). 3. Set the Fail Safe jumper to the LLFS position (lower two pins). 4.
Page 3 Wiring It is recommended that conduit be installed onto the ¾” NPT connection on the electronics housing. A seal drain fitting should be used to prevent moisture from entering the switch. All wiring, conduit, and electrical fittings must conform to local electrical codes for the location selected.
Page 4 TROUBLESHOOTING Problem Solution Check wiring; verify that the correct input voltage is applied Verify that liquid is filling the sensor gap Check for dense foam or dried product in the gap. Switch may not function properly if either condition exists. No output change with level change Check sensor phono plugs for a good connection.