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SENSOR ADJUSTMENT

The sensors are factory preset to allow for quick installation in most applications. 
Verification of proper wiring or coverage, or customizing the sensor’s settings can 
be done using the following procedures. To make adjustments, open the Front Cover 
with a small screwdriver.
Before making 
adjustments, make 
sure the office 
furniture is installed, 
lighting circuits are 
turned on, and the 
HVAC systems are in 
the overridden/ on 
position. VAV systems 
should be set to their 
highest airflow. Set 
the Time Delay to the 
desired settings. See 
“DIP Switch Setting”, 
next page. 

To Test Occupancy Sensors

1.   Ensure the Ultrasonic Activity LED is enabled (DIP switch 6 ON).

2.  Ensure the Time Delay is set for 

Test Mode*

 using the “5 seconds/SmartSet” 

setting. (DIP switches 3, 4, & 5 are OFF). 

3.   Ensure that the Ultrasonic Sensitivity trimpot is set to about 90%, clockwise.

4.   Remain still. The LED should not flash. The lights should turn off after 5 seconds. 

(If not, see “Troubleshooting.”)

5.   Move about the coverage area. The lights should come on. Adjust the Ultrasonic 

Sensitivity as necessary to provide the desired coverage (Green LED indicates 

activation from the ultrasonic sensor).

When testing and adjustment is complete, reset DIP Switches to the desired 
settings, and replace the cover on the sensor.

*  Test Mode

 is a temporary state that starts when you first set the sensor’s DIP 

switches for the “5 sec/SmartSet mode” (switches 3, 4, 5 OFF). If you need to 
invoke the 

Test Mode

 and the DIP switches are already set for 5 sec/SmartSet, 

toggle DIP switch 5 ON then back to the OFF position. This provides a 5 minute 
test period. During the test period, the Time Delay is only 5 seconds.

Keyhole slots
(for mounting to 
4" octagonal box)

Double gang 
mudring
mounting holes 

DIP switches

Ultrasonic 
sensitivity
trimpot

ON

1

2

3

4

5

6

7

8

ECE

Ultrasonic 
transducer
cones

Ultrasonic 
activity
LED (Green)

Call 800.879.8585 for Technical Support

Summary of Contents for UT-305

Page 1: ...to 55 C Time Delay Adjustment 5 to 30 minutes Walk Through Mode 3 minutes if no activity after 30 sec Test Mode 5 sec upon intial power up or DIP switch reset Ultrasonic Coverage Model UT 305 1 up to 500 ft 2 Model UT 305 2 up to 1000 ft 2 Model UT 305 3 up to 2000 ft 2 Sensitivity Adjustment Minimum to Maximum trimpot Frequency 40kHz Installation Instructions UT 305 Ultrasonic Low Voltage Occupan...

Page 2: ...lights off after only 3 minutes if no activity is detected after 30 seconds of an occupancy detection The UT 305 operates on 24V supplied by Watt Stopper Power Packs The sensors can operate on 24VDC 24VAC or half wave rectified AC COVERAGE PATTERN The UT 305 is available in 3 models Each model has a different size coverage pattern The coverage shown represents walking motion at a mounting height o...

Page 3: ...nsor to the ceiling The UT 305 is designed for a ceiling height of about 8 10 feet Mounting above or below this range will significantly affect the coverage patterns As a general rule each occupant should be able to clearly view the sensor Open Office Area Coverage To get complete coverage in an open office area install multiple sensors so that there is approximately 20 overlap with each adjacent ...

Page 4: ...al on sensor To add a MANUAL SWITCH such as the LVS 1 Momentary Toggle Switch or RS2 3 Low Voltage Momentary Switch to the above applications connect Wire from one side of switch to Common terminal on sensor Wire from other side of switch to Man Switch terminal on sensor WIRING DIRECTIONS CAUTION TURN POWER OFF AT THE CIRCUIT BREAKER BEFORE INSTALLING POWER PACKS OR SENSORS Call 800 879 8585 for T...

Page 5: ...Color Legend Load 1 Load 2 Optional UT 305 Rear Housing Depluggable Terminal Front Cover Ceiling Spring Clips 2 Blue Control Out 24V Common Low Voltage Class 2 Line Voltage Line Neutral Feed Through Power Pack Black Red 1 2 Line Voltage Switches Standard wiring with local off switch ...

Page 6: ...pluggable Terminal Front Cover Ceiling Spring Clips 2 Blue Control Out Black 24V Low Voltage Class 2 Line Voltage Line Neutral Feed Through Power Pack Man Switch Red UT 305 Common For low voltage momentary switch set DIP switch 1 ON Man Switch Jumper Back of LVS 1 Common White Black Red Line Voltage Wire Color Legend ...

Page 7: ...front cover onto the sensor Using an Octagonal J Box 1 Pull the low voltage wires from the power pack into the J Box through the conduit knockout 2 Connect the low voltage wires to the appropriate terminals on the sensor 3 Loosen the appliance mounting screws attached to the J Box 4 Align the sensor in the J Box so that the mounting screws on the box match the key holes on the sensor s rear housin...

Page 8: ...wise 4 Remain still The LED should not flash The lights should turn off after 5 seconds If not see Troubleshooting 5 Move about the coverage area The lights should come on Adjust the Ultrasonic Sensitivity as necessary to provide the desired coverage Green LED indicates activation from the ultrasonic sensor When testing and adjustment is complete reset DIP Switches to the desired settings and repl...

Page 9: ...ic On This mode uses occupancy as well as switch activation to turn the load ON A manual switch provides the following additional functionality a The load can be turned ON by manual switch activation and it stays on as long as occupancy is detected The sensor time delay operates as programmed When the load turns OFF due to lack of occupancy detection the load can be turned ON again by occupancy de...

Page 10: ... starts when no motion is detected After no motion is detected for the length of the time delay the sensor will turn the lights off The sensor can select the time delay using SmartSet or you can select a fixed time delay SmartSet records occupancy patterns and uses this history to choose an optimal time delay from 5 to 30 minutes SmartSet behavior starts immediately and is refined continually as h...

Page 11: ... may be experiencing activations from outside the controlled area or from some type of interference see Unwanted Sensor Activations below 2 Check all sensor wire connections 3 Disconnect power pack s blue wire If the lights do not turn off replace power pack Reconnect blue wire If the lights turn off the problem may be in the sensor to check Reconnect the blue wire Turn sensitivity and time delay ...

Page 12: ... 305 2 Ultrasonic Occupancy Sensor up to 1000 sq ft coverage Low Voltage UT 305 3 Ultrasonic Occupancy Sensor up to 2000 sq ft coverage Low Voltage UT 300 1 2 3 Ultrasonic Occupancy Sensor Low Voltage w Isolated Relay and Manual On feature BZ 50 Power Pack 120 277VAC 50 60Hz 225mA 20A ballast or incandescent 1HP 120 250VAC BZ 150 Power Pack 120 277VAC 50 60Hz 225mA 20A ballast or incandescent 1HP ...

Page 13: ...ities on the part of WattStopper for consequential damages arising out of or in connection with the use or performance of this product or other indirect damages with respect to loss of property revenue or profit or cost of removal installation or reinstallation 2800 De La Cruz Boulevard Santa Clara CA 95050 800 879 8585 www wattstopper com 03631r4 9 2013 Please Recycle ...

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