Hacousto Holland bv
Industrieweg 87
2651BC Berkel & Rodenrijs
4Evac SW6 / SW6-LITE INSTALLATION and USER
GUIDE V04
Author:
TC
Page 11 of 26
In this example above SW6 has following loads connected to output terminals:
-
Line 1: 200Ω re EOL module (in parallel)
-
Line 2: open
-
Line 3: EOL module (~300Ω @20kHz)
-
Line 4: 100Ω re EOL module (in parallel)
-
Line 5: open
-
Line 6: open
5.2.4
EOL monitoring - step plan for commissioning
In order to properly carry out system commissioning, you need to walk through following step plan,
for each loudspeaker line separately.
1)
Preparation
A.
Disconnect loudspeaker line from the system;
a)
Briefly c and – wire of loudspeaker cable in order to discharge any residual
electrical charge remaining in the circuit. If line has loudspeakers with internal DC-
blocking capacitors, the residual charge may be significantly influencing further
measurements. After few seconds disc and – wires.
B.
Measure loudspeaker line with multimeter:
a)
Check if + and – wires are not shorted;
b)
Check continuity of loudspeaker cable (open circuit)
(1)
Connect + and – wires together at the end of the line (usually right at the last
loudspeaker).
(2)
Measure loop resistance of the loudspeaker cable at the connection terminal, where
the line is supposed to connect to the system (resistance b and – terminal);
(3)
Check if loop resistance of the loudspeaker cable corresponds with total length of
the cable, according to installation design;
(4)
Disconnect previously con and – wires at the end of the line.
C.
Measure the line with 1kHz impedance meter or LCR meter;
a)
Measure rated total impedance at 1 kHz ( Z
1k
[Ω] )
b)
Calculate the total rated power load of the line in watts using formula
P[W] = 10000 / Z
1k
[Ω]
c)
Compare if the measured power load corresponds with the total load provided by the
installation design.
d)
Make sure the power load does not exceed the maximum total line capacity as well as
amplifier
capacity.