Digital Security Controls Ltd. 17WLS922L User Manual

Available Models: WLS912L-433, WLS922L-433

The WLS912L and WLS922L are battery-operated glassbreak sensors,

designed to detect the sound produced by the shattering of framed

glass. Equipped with an RF transmitter, the WLS912L/WLS922L estab-

lishes a supervised, one–way communications link with the system con-

troller. The WLS912L/WLS922L use Dynamic Signal Processing* to

provide accurate detection of plate, laminated, wired and tempered

glass types, while rejecting common false alarm sounds.

*Protected under US Patent 5,675,320

Specifications

• Operating Voltage: 3.0V (two 3V Lithium batteries)

• Battery capacity: 1500mAh

• Operating Temperature: 0°C - 50°C (32°F - 122°F)

• Dimensions: 135 x 60 x 35mm

• Operating Humidity: 5% – 95% RH, non-condensing

• Weight: 130g

• Low Battery level: 2.65V

• Input rating: 3V

DC 

(max)/0.2mA

Maximum detection range

Compatible receivers: RF5132-433, RF4164-433, RFK55XX-433,

RF5108, SCW9045/47-433, PC9155-433.

Battery Guidelines and Installation

• Use fresh batteries. Most batteries have a “best before” date printed on

their packaging or on the batteries themselves. Buy batteries that have

a “best before” date of two years or more from your purchase date

• When disposing of used batteries, follow the instructions and precau-

tions printed on the batteries. Many cities and communities have

collection sites or services for used household batteries. Contact your

municipal offices for information on the disposal of used batteries

• Do not mix old and new batteries

• Dispose of any batteries promptly, keep away from children

NOTE: Use only Energizer Lithium EL123AP, Tekcell CR123A, Panasonic

CR123A or Duracell Ultra 123 lithium battery.   Use of any other battery

may present a risk of fire or explosion.

CAUTION: The cell used in this device may cause a fire or chemical burn

hazard if mistreated. Do not recharge, disassemble, heat above 100°C

(212°F) or incinerate.

Models WLS912L-433/WLS422L-433 is UL listed for Residential Burglary

and Commercial Burglary applications in accordance withe the follow-

ing standards: UL639 , UL1023, UL1610.

To install batteries

1. Remove the detector from its mounting plate: If unmounted, hold the

detector by its sides and push down on the top end of the mounting

plate, as shown at right. If mounted, press the detector in the direction

shown at left.

2. Install the batteries positive (+) side first, with the correct polarity, as

shown below. 

Setting the Dip Switches

The detector has user-selectable dip switch settings as shown.

Dip Switch 1– Not Used

Dip Switch 2– Level 1/Level 2 Detection

This is a sensitivity selection dip switch which may be used to optimize

false alarm immunity for certain acoustic environments. 

The detector is factory set for Level 1 detec-

tion (Dip Switch 2 = OFF). This is the highest

sensitivity setting for the detector, and will be

suitable for most applications.

For rooms which are smaller, and contain a

significant number of sound-reflective sur-

faces (such as bathrooms, kitchens,

entrances, etc.), Level 2 detection (Dip

Switch 2=ON) provides a reduced sensitivity setting which may be more

appropriate.

Selecting a Mounting Location

The detector is unidirectional and picks up sound aimed directly into the

microphone and center of the detector. Coverage is measured from the

center of the detector to the point on the glass farthest from the detector.

Guidelines for optimizing detection and avoiding false alarms

• For optimum protection, the detector should have a direct line of sight

to the protected glass.

• Window coverings will absorb sound from the shattering glass. In these

cases, mount the detector as close as possible to the protected glass,

either on an adjacent wall, the ceiling, or behind the window covering if

possible. 

• The detector should be mounted at least 1.8m (6 feet) off the ground.

• Do not mount the detector on the same wall as the protected glass.

• Avoid installation near noise sources, such as speakers or other

objects which produce sounds continuously.

• Do not install the detector beyond the maximum recommended range,

even if the AFT

-

100 simulator shows additional range - future changes

in room acoustics could reduce the range.

• Application on 24 hour loops should be avoided unless the location is

unoccupied.

• Test false alarm immunity by creating any sounds in the room which

will likely occur when the alarm system is armed.

NOTE: Test the detector thoroughly for proper placement using the AFT-

100 Glassbreak Simulator. Other simulators may trip the unit, but will not

provide accurate test results.

Testing the detector

Perform the following

tests with each detector

to ensure that it is

mounted in the best

possible location.

Detection Test

1. Place the detector in

test mode by

momentarily pressing

down on the tab on the base plate, as shown. The LED will blink period-

ically to indicate that it is operating in test mode. You can end the test

mode by momentarily pressing the tab on the base plate. Test mode will

end automatically after 10 minutes.

2. Use double-sided tape to temporarily mount the detector in the selected

location

NOTE: The detector will not respond to the glassbreak simulator unless

the test mode operation has been enabled. To enable test mode, press the

test mode tab on the base plate for one second.

3. At the window to be protected, test the detector using the AFT-100

Glassbreak Simulator. The AFT-100 Glassbreak Simulator generates

plate or tempered glass sounds. Use the plate glass setting if you are

unsure of the glass type. Observe the following when testing the detec-

tor:

• If the WLS912L/WLS922L detects the sound generated by the AFT-

100 three times in a row, the detector is in a good location. If the

detector does not respond each time, relocate the detector and

repeat the test.

• If the windows in question are covered by drapes or blinds, place the

AFT-100 tester behind the closed window coverings, and then acti-

vate it. If the drapes prevent reliable detection, we suggest that the

detector be mounted behind the drapes either on an adjacent wall or

on the ceiling.

• If there are multiple windows, or one large window, activate the tes-

ter at the furthest point on the glass from the detector.

Glass Type Thickness

Minimum Glass 

Size (L X W)

Level 1 

Setting

Level 2 

Setting

Plate/

Tempered

1/8" – 1/4"

3 – 6 mm

12" × 12"

30cm ×  30cm

20ft

6m

10ft

3m

Wired/

Laminated

1/4"

6mm

18" × 18"

46cm × 46cm

20ft

6m

DO NOT 

USE