Sensor Adjustment - LEGRAND Wattstopper DT-200 Instructions D'installation

The Light Level feature holds lights OFF upon initial occupancy if adequate ambient light exists. It will not turn the lights OFF if they are
ON. The default setting is for maximum, meaning that even the brightest ambient light will not hold the lights OFF.
Notes on Functionality
• Avoid mounting the sensor close to lighting fixtures.
• Adjust during daylight hours when ambient light in the area is at desired level.
• Light Level cannot be enabled while Test Mode is active. Either wait for Test Mode to expire, or select any of the other Time Delay
settings before enabling the Light Level feature.
• PIR occupancy indicator LED may still respond when lights are being held OFF. LED will also flash periodically to indicate the
sensor has Light Level enabled.
• Light Level settings are only saved in the event of a power loss. Disabling Light Level and then re-enabling it will not return it to
previous settings.
• If Test Mode is enabled after Light Level has been set, Light Level functionality will cease to function throughout the duration of Test
Mode. When Test Mode period expires, the Light Level functionality will resume, even if the DIP Switches remain set to Test Mode.
Setting Light Level
1. Make sure Test Mode is not active.
2. Open the Front Cover and locate the Light Level pushbutton. See Sensor Adjustment.
3. Press the Light Level button. Do not exceed 5 seconds.* The sensor enters setup mode, as indicated by the rapidly flashing LEDs.
The LEDs will flash throughout the setup process. Occupancy indications from the LEDs is disabled during setup.
4. Move away from the sensor to avoid interference with light level detection. The sensor measures the light level for a 10 second
period, then averages the readings and automatically sets the level that will be used as the new setting. The sensor will hold lights
OFF when the ambient light exceeds this setting.
5. When the LEDs stop flashing, replace the Front Cover.
*Disabling Light Level
Pressing the pushbutton for 5 seconds or more resets the light to default (maximum).
Press and hold the Light Level button for 5 seconds or until the detection LEDs turn ON and then OFF. The LEDs flash rapidly for 10
seconds after the setting has changed.
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.
There is a 30 second warm-up period when power is first applied.
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 Logic Configuration
and Time Delay to the desired settings. See Logic Configuration Chart.
To Test Occupancy Sensors
1. Ensure the Time Delay is set for Test Mode* using the "Test Mode/20
minutes" setting. (DIP Switches 1, 2, & 3 are OFF).
2. Ensure that the Light Level is at default (maximum). Press and hold the
pushbutton for 5 seconds, or until the Green LED flashes rapidly. Wait 10
seconds for the flashing to stop.
3. Ensure that the Ultrasonic Sensitivity trimpot is set to about 70%, clockwise.
4. Remain still. The red and green LEDs should not flash. The lights should turn
OFF after 5 seconds. (If not, see Troubleshooting.)
5. Move around within 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).
6. When testing and adjustment is complete, reset DIP Switches and Light Level 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 "Test Mode/20 minutes" (switches
1, 2, 3 OFF). If you need to invoke the Test Mode and the DIP Switches are already set for Test Mode/20 minutes, toggle DIP
Switch 1 ON, then back to the OFF position. This provides a 10 minute test period. During the test period, the Time Delay is only
5 seconds.
7. When the LEDs stop flashing, replace the Front Cover.
LIGHT LEVEL FEATURE

SENSOR ADJUSTMENT

4