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Pre-Construction Coverage Verification Survey
The pre-construction coverage verification survey is performed after the bid has been accepted and before
construction begins. It is done to determine the location of each Receiver. Each Receiver location should be
checked using a standard Receiver in the test mode.
Verify Each Potential Receiver Location
Using a Standard Receiver in Receiver Spacing Mode
Receiver Spacing Mode is enabled with Jumper P5 in place (Jumper P4 removed) on a standard Receiver (see
the EA102 Receiver Installation Instructions). This mode is exactly the same as the Test Mode above, except
that only transmissions with an adequate receive margin are sounded. This indicates the maximum acceptable
spacing of Receivers. Use the following procedure to test the spacing of Receivers:
1)
Mount the first Receiver. Put jumpers P1, P2, P3, and P5 in place, remove all other jumpers. Power the
Receiver from a 9 or 12 VDC source.
2)
Take the second Receiver and a Transmitter a distance away from the first Receiver.
3)
Activate the Transmitter.
4)
If Receiver 1 sounds the test beep, Receiver 2 is within range. Repeat this test until Receiver 1 no longer
sounds the test beeps. Move back to the last location where Receiver 1 received the test beeps. This location
marks the maximum spacing between Receivers. The distance between receivers should not exceed 24 m (80
ft.) indoors and 91 m (300 ft.) outdoors. Mount Receiver 2 at this location or closer to Receiver 1.
NOTE: Do not use the Test Mode (Jumper P4) to determine Receiver spacing.
Using a Standard Transponder, Receivers and Laptop Computer to Determine
Receiver Location
NOTE: System Software and Area Map must be installed on Laptop Computer to use this method.
A standard Transponder with long multiplex wires connected to standard Receivers can be used to see actual
alarm location before the Receivers are placed. Place the Receivers in the proposed locations wired back to the
Transponder. Program the Receivers with their locations in the Transponder database. Using the maintenance
Transmitter and the maintenance alarm database activate alarm transmissions within the area surrounded by the
temporarily placed Receivers. Verify that the location accuracy is acceptable at all points of concern. If not
acceptable move the Receivers, update the Receiver location in the Transponder database and retest. Do not
test outside of the last Receiver in any direction, as this will give incorrect locations. Repeat this test in all areas
of different construction and concern at the site.
Figure 2: Receiver Spacing
Security Escort Training
Page 21 of 142
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