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Slave Induction Loops; Bracket; Metal Loss Compensation - Bosch PLN-1LA10 Installation And User Instructions Manual

Security systems plena loop amplifier
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Plena Loop Amplifier | Installation and User Instructions | Configuration
5.2.2

Slave induction loops

Do as follows:
11 Disconnect the master induction loops from the
master loop amplifier.
12 Connect the slave loop amplifier to the mains power
supply with a power cable.
13 Set the AGC/Limiter switch on the rear of the slave
loop amplifier in the Limiter position.
14 Switch on the master loop amplifier with the power
switch on the front of the master loop amplifier.
15 Switch on the slave loop amplifier with the power
switch on the front of the slave loop amplifier. When
the induction loop system contains more than one
slave loop amplifier, make sure that all other slave
loop amplifiers are off.
16 Increase the volume of audio input 2 of the slave
loop amplifier with its volume control until the
Limiter LED on the front of the slave loop amplifier
comes on.
17 Increase the electric current through the slave
induction loops with the Master volume control on
the front of the slave loop amplifier until the
magnetic field strength in each slave induction loop
is 100 mA/m (pink noise source) or 70 mA/m (sine
wave of 1 kHz).
18 Switch off the slave loop amplifier with the power
switch on the front of the slave loop amplifier.
19 Repeat the procedure for the other slave loop
amplifier in the induction loop system.
Note
Do not forget to re-connect all induction loops
after you have configured the electric current
through the induction loop of the last loop
amplifier.
Bosch Security Systems | 2005-05 | 9922 141 50672en
5.2.3

Bracket

You can cover the front of the loop amplifier with a
bracket refer to figure 5.2). When you cover the front,
you make sure that nobody can change the position of
the volume controls. Thus, you make sure that nobody
can change the electric current through the induction
loop that is connected to the loop amplifier.
0 dB
-6 dB
-2 0 dB
Po we
r
1
2
+
+
figure 5.2: Cover bracket
5.3

Metal loss compensation

Do as follows:
1 Turn the Metal loss compensation control on the
rear of the loop amplifier to the leftmost position.
2 Connect headphones to the headphones socket on
the front of the loop amplifier to listen to the audio
signal that is sent to the connected induction loops.
3 With the same headphones, listen to the audio signal
on the induction loops through an induction loop
receiver.
4 Turn the Metal loss compensation control to adjust
the tone of the audio signal on the induction loops.
5 Repeat the procedure for the other loop amplifiers in
the induction loop system.
en | 28
1
5
10
Cu rre
Ma ste
nt
r
Fa ult
Lo op
Int eg rity
AG C
Lim ite
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