Hacousto Holland bv
Industrieweg 87
2651BC Berkel & Rodenrijs
4Evac SW6 / SW6-LITE INSTALLATION and USER
GUIDE V04
Author:
TC
Page 12 of 26
2)
EOL measurement in 4EVAC Manager
A.
Turn on Live monitoring
a)
Open 4EVAC Manager and load system configuration,
b)
Connect to the system in order to have live link
c)
Go to “Live monitoring” tab and find the right device
(1)
If necessary, refresh the device list by pressing “Refresh device list” button
d)
Click “Live monitoring” button for that device
(1)
If necessary, wait for the measurement to stabilize.
B.
Connect the loudspeaker line to the system
C.
Find limits and set tolerance
a)
Open
(1)
Make sure the line is not loaded with EOL module (only cable + loudspeakers)
(2)
Wait for the measurement to stabilize
(3)
Note down impedance value as Z
open
If Live Monitoring displays “Open” instead of a number, take 5kΩ as open
impedance.
b)
Short
(1)
Connect + and – wires together at the end of the line (usually right at the last
loudspeaker).
(2)
Wait for the measurement to stabilize
(3)
Note down impedance value as Z
short
If Live Monitoring displays “short” instead of a number, take 10Ω as short-circuit
impedance.
(4)
Disconnect previously con and – wires at the end of the line
c)
EOL module (reference load)
(1)
Connect EOL module at the end of the line (usually right at the last loudspeaker or
behind it).
(2)
Wait for the measurement to stabilize
(3)
Note down impedance value as Z
EOL
D.
Calculate deviations and tolerance
a)
Short deviation
D
open
[%] = 100 * ( 1 – Z
EOL
/ Z
open
)
b)
Open deviation
D
short
[%] = 100 * ( 1 – Z
EOL
/ Z
short
)
c)
Determine optimum tolerance of EOL measurement: