Faraday 8720, Руководство пользователя

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3
TESTING
19
Testing
Testing a 6000/7000 Loop
The 8720 may be used to test MPC-6000/MPC-7000
loops before the system is connected. The 8720 checks
that all of the devices are communicating and also
checks for ground faults and short circuits. By using the
loop test feature, all troubles can be cleared from the
device loop before it is connected to the panel.
The loop test menu is available only when the system is set
for 6000/7000 and it operates only when the 8720 is powered
from AC.
Be sure to disconnect the wire between the device and/or
detector loop and the system before performing the loop test.
Follow the procedure below to test a loop of MPC-6000/
MPC-7000 detectors and devices.
• Connect the 8720 to an AC wall outlet using the
external power supply provided. (See Figure 1, page
2, for location of External Power Connector.)
• Connect the loop drive cable P/N 555-133891 to the
loop to be tested and connect the ground connec-
tion cable P/N 555-133920 to a valid ground, as
shown in Figure 3, page 20. (The ground connection
is needed only to test for ground faults.)
• With the 8720 displaying the Main Menu, press the
LOOP TEST button. Note that this is visible only if
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