IntelliSense FlexGuard-Plus FG-930 - Glassbreak Detector Installation

The FG-930 from IntelliSense is a dual technology glassbreak detector that uses flex detection and audio discrimination to detect breaking glass.

The FG-930 uses separate microphones to sense flex and audio frequencies. The flex microphone is sensitive to ultra low frequencies, the type generated by a blow to a glass window. The audio microphone detects the higher frequencies of breaking glass.

The flex microphone is also equipped with an advanced acoustic filter for more stable flex detection. This filter is specially designed to prevent the microphone overload caused by very loud sounds.

The FG-930's audio technology remains off until the flex technology detects a blow to the glass. .or an alarm condition to occur, the audio must detect the frequency of breaking glass within a defined time-window after the flex detects a blow to the glass.

Because both technologies must detect and verify glass breakage, false alarms are virtually eliminated.

FEATURES

• Dual flex/audio technology
• Separate microphones for audio and flex detection
• Advanced acoustic filter to prevent microphone overload
• 8 - 14 VDC operation
• Low 30 mA at 12 VDC current draw
• Alarm memory
• Transient protection
• Energized form C alarm relay with voltage supervision
• RF immunity
• Indicator LEDs
• No adjustment on audio
• Adjustment on flex detection to fit characteristics of each location
• Cover tamper switch
• Noise burst rejection circuit

MOUNTING LOCATION

The FG-930 can be mounted on walls, in corners, even on false or suspended ceilings. Refer to the guidelines below when selecting a mounting location.

• The unit must have a direct line of sight to, and a clear view of, the protected glass.
• Locate the FG-930 within 30' (9 m) of the glass to be protected.
• Curtains, blinds, and other window coverings will absorb energy from breaking glass. Heavy curtains, for example, will effectively block the sound signal. In these cases, mount the unit on the window frame behind the window covering, or above the window. Make sure to test the unit thoroughly for proper detection.
• Do not mount the unit in front of air ducts or forced air fans, or close to bells measuring 2" (or larger) in diameter.

MOUNTING PROCEDURE

Orient the unit as shown in Figure 1. Remove the screw located at its top. While depressing the latch near the top of the unit, swing the front cover forward. Use the back cover as a template to mark holes for the mounting screws and wiring, then drill the holes.

Tip: If mounting the FG-930 near heavy machinery or central air conditioning, test the glass-break function before mounting. Use a 9 V battery for power, and tape the sensor to the desired mounting location. Refer to the Flex Adjustment, Testing the FG-930, and Final Testing sections to determine which location will be most suitable.

Note: If you plan to corner-mount the unit, remove the printed circuit board before marking and drilling holes for the mounting screws.

Pull the wiring into the unit through the back cover. Using the two mounting screws, mount the rear housing at the desired location.

WIRING

Observing the proper polarity, wire the unit as shown in Figure 2. (Use 22 to 14 AWG.) Reverse-polarity connections will not damage the unit.

FLEX ADJUSTMENT

To adjust the flex technology of the FG-930: Use a screwdriver to set the flex sensitivity control (R5) at MAXIMUM by turning it all the way clockwise. Refer to Figure 3.

Turn on any heating/air conditioning system in the vicinity and observe the yellow flex LED (DS2) for approximately one minute. Excessive subsonic (inaudible) noise typically produced by air handling systems may cause the flex LED to flash randomly.

If it flashes randomly, turn the R5 control counterclockwise just until the flashing stops.

TESTING THE FG-930

Use the FG-700 or FG-701 Glassbreak Simulator from IntelliSense to test the FG-930 detector. Point the front of the FG-700/701 directly at the FG-930 sensor when testing.

Activate the simulator in MANual mode at the farthest point of the glass to be protected (30' maximum). If the green LED (DS1) on the detector flashes, the audio technology will detect breaking glass at that distance.

Test the flex technology by carefully striking the glass with a cushioned tool. If the yellow LED on the detector flashes, the flex technology will be sensitive enough to detect a blow to the glass at that distance.

Switch the FG-700/701 simulator to the FLEX mode, press the red start button, and generate a flex signal by carefully striking the glass. The simulator will automatically generate a burst of glass-break sound, and the red LED (DS3) on the FG-930 should light to indicate an alarm condition.

See the FG-700/701 operating instructions for additional testing information.

The FG-930 should be tested at least once each year to ensure proper operation.

FINAL TESTING

To ensure maximum protection against false alarms, activate any device in the area that may automatically cycle: pumps, generators, heating/air conditioning units, etc. If the cycling devices trigger an alarm, mount the unit in a different location.

There is no need to relocate the detector if the cycling only briefly triggers the flex technology (the yellow LED flashes).

ALARM MEMORY

The FG-930 is equipped with a latching circuit for the alarm LED. When the latching circuit is activated, an alarm condition will make the red alarm LED on the unit latch on. This feature is particularly helpful in determining which unit alarmed in a multiple detector installation.

To activate the latching circuit, install a jumper at position W2 on the printed circuit board (refer to Figure 3). To reset the latched alarm LED, remove then replace the jumper on W2, or remove then restore power to the detector.

Note: The latching circuit has absolutely no effect on the alarm relay. The alarm relay will continue to function as normal.

SPECIFICATIONS

Range:
30' (9 m) maximum

Alarm relay:
Form C
500 mA max
24 VDC max

Voltage supervision:
Performance remains reliable even if the voltage decreases. If the input voltage drops below approximately 6.0 VDC, a forced alarm occurs.

Tamper switch:
Form A (NC)
50 mA, 30 VDC

Power requirements:
8 - 14 VDC
30 mA typical at 12 VDC
35 mA max (worst case)

RF immunity:
30 volts per meter
1 MHz - 1000 MHz

Dimensions:
3.9" H x 2.4" W x 0.79" D (98 mm x 61.5 mm x 20 mm)

Weight:
3 oz (85 g)

Operating temperature:
32º to 120º F (0º to 49º C)

Glass types:
1/8", 3/16", and 1/4" plate;
1/4" laminated, wired, and tempered; minimum size
10-7/8" x 10-7/8", single pane

Accessories:
FG-700 Glassbreak Simulator
FG-701 Glassbreak Simulator

Approvals/Listings:
UL listed
C-Tick

Alarm duration:
4 seconds

The FG-930 must be connected to a UL listed power supply or control unit capable of providing a minimum of four hours of standby power.

Documents / Resources

Download manual

Here you can download full pdf version of manual, it may contain additional safety instructions, warranty information, FCC rules, etc.

Download IntelliSense FlexGuard-Plus FG-930 - Glassbreak Detector Installation