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D-303371 GB-501 PG2 Installation Instructions
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. TESTING PROCEDURES
TESTING PROCEDURES
TESTING PROCEDURES
TESTING PROCEDURES
4.1 How Does the Test Mode Works
The Pattern Recognition Technology™ of the GB-501 PG2, ignores most false alarm sounds, including glass-break testers. In order to test the
GB-501 PG2, a test mode is used. With the sensor in the test mode, processing of the glass-break pattern in the upper and lower frequencies is
disabled. The GB-501 PG2 is then sensitive only to the mid-range frequencies which the Sentrol 5709C hand-held tester reproduces. It's the mid-
range frequencies that determine sensor coverage.
IN THE NORMAL MODE THE DETECTION LED FLASHES BRIEFLY UPON RECEIVING A LOUD SOUND. WHEN IN THE NORMAL MODE, THE
GB-501 PG2 WILL NOT TRIP TO THE TESTER’S SIGNAL, UNLESS THE TESTER IS HELD NEXT TO THE SENSOR.
NOTE:
Each time the sensor alarms it also goes into the TEST mode for one minute.
4.2 Switching the Sensor to the Test Mode
Use the Sentrol 5709C or the Intellisense FG701 hand-held tester to switch the sensor into the test mode. Set the tester to tempered glass, hold
the tester speaker directly on top of the sensor and activate the tester. The sensor will alarm, then it will go into test mode for one minute. When in
test mode the LED on the sensor will flash continuously. Prolong the test session by firing the tester at the sensor at least once a minute.
4.3 Testing the Sensor
(see Figure 10).
A.
Holding the tester near the surface of the glass, aim the tester at the GB-501 PG2 and press the test button. If drapes or blinds are present,
test with the hand-held tester behind the closed drapes or blinds (do not install the sensor where heavy or lined drapes are used). If the sensor
is mounted on the same wall, point the tester at the opposite wall.
Figure 10.
Testing the GB-501 PG2
B.
The tester has a different setting for each type of glass. It should always be set for tempered or laminated glass (either is correct and both have
the same range) unless you are certain that all the protected glass is plate glass.
C.
When the LED on the sensor goes solid momentarily while the tester is triggered, the glass is within detection range.
D.
If the LED does not go solid, but continues flashing as before, re-position the sensor closer to the protected windows and retest. This may
require adding sensors in order to achieve adequate coverage. It is very rare that the sensor will not activate within its stated range of
coverage. Double check adequate battery strength in the hand-held tester. A new tester battery will likely
restore the range.
Note:
The sensor will automatically change from test mode to normal mode approximately one minute after the last signal received from the
hand-held tester.
IMPORTANT! Room acoustics can artificially extend the range of a glass-break sensor. The specified range of the GB-501 PG2 has been
established for worst-case conditions.
While the sensor is likely to function at additional range, it may miss a “minimum output” break, or
room acoustics may be changed at some future time, restoring sensor coverage back to the normal range of 6 m (20 ft).
Do not exceed the rated range of the sensor, regardless of what the tester shows.
4.4 Hand Clap Test
The GB-501 PG2 can be checked by the installer or end user while in normal mode, simply by clapping hands loudly under the sensor. The LED
will flash twice, but the sensor will not trip. This verifies visually that there is power to the sensor, and that the microphone and circuit board are
functioning.
The hand clap activation is only momentary, so there is no appreciable effect on battery life.
INSTALLATION TIPS
A.
The GB-501 PG2 is designed to detect the shattering of framed glass mounted in an outside wall. “Testing" the sensor with unframed glass,
broken bottles, etc. may not trip the sensor. The GB-501 PG2 typically does not trip to glass break tests in the middle of a room as such
breaks are false alarms.
B.
False alarms are most likely to occur when installed on a 24-hour loop in glass airlocks and glass vestibule areas, when mounted above sinks,
when used in residential car garages and in other small, acoustically live rooms and rooms where multiple sounds can reflect and eventually
duplicate the glass break frequency pattern. For occupied area glass break protection in such applications, use shock sensors.
C.
Installing the GB-501 PG2 on 24-hour loops will increase false alarms. The GB-501 PG2 is recommended for perimeter loops and is designed
to function without false alarms in occupied areas. On a 24-hour loop, which is armed all day/all night every day, the false alarm technology
will be pushed to its limit since some sounds in some conditions can duplicate the points on the glass break pattern that the GB-501 PG2
detects. Install the GB-501 PG2 on a perimeter loop, which is armed whenever the door and window contacts are armed. For occupied area
installations, GB-501 PG2 false alarm immunity is best in rooms with only moderate noise.
D.
GB-501 PG2 detects the shattering of glass. Like all glass-break sensors, it may not consistently detect cracks in glass, or bullets that break
through the glass or break out the glass. Glass-break sensors should always be backed up by interior protection.
