Dwyer ULSS - Manual (Page 5)

Rev 5 MN890570 5 of 30
SAFETY PRECAUTIONS Step Four
About this Manual: PLEASE READ THE ENTIRE QUICK START PRIOR TO INSTALLING OR USING THIS
PRODUCT. This manual includes information on the Series ULS Ultrasonic Level Switch, controller and
transmitter from Dwyer Instruments, Inc. Please refer to the part number located on the switch label to verify
the exact model configuration, which you have purchased.
User’s Responsibility for Safety: Dwyer Instruments, Inc manufactures a broad range of level sensing
technologies. While each of these sensors 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 professional staff should install and/or repair this product. Install
the transmitter with the included FKM gasket and 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 to 28 VDC is used to power the Series ULS. Electrical wiring of the
transmitter should be performed in accordance with all applicable national, state, and local codes. Note: Series
ULS uses latching relays. When power is removed to the sensor, the relays will remain in their last state. Ex: If the
relay is energized, when power is removed, the relay will remain in an energized state.
Material Compatibility: The enclosure is made of Polycarbonate (PC). The transducer is made of
Polyvinylidene Fluoride (PVDF). Make sure that the model, which you have selected, is chemically compatible
with the application media.
Enclosure: While the transmitter housing is liquid‐resistant the Series ULS 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.
Safety
Installation should be done by properly trained staff
Supply voltage should never exceed a maximum of 28 VDC
Make sure the sensor is chemically compatible with your application
Design a fail‐safe system that accommodates the possibility of sensor and/or power failure
This sensor should not be used in classified hazardous environments
Make a Fail‐Safe System: Design a fail‐safe system that accommodates the possibility of transmitter
and/or power failure. Dwyer Instruments, Inc recommends the use of redundant backup systems and alarms
in addition to the primary system.
Flammable, Explosive or Hazardous Applications: Series ULS should not be used within classified
hazardous environments.
Warning: Always use the FKM gasket when installing the Series ULS, and make sure that all electrical
wiring of the switch is in accordance with applicable codes.