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Issue 2 ECR 2462
BVRDADIM Installation Procedure
Calibration (All Lines)
1
Ensure all individual loudspeakers are fitted with a DC Blocking Capacitor and tapped
to produce the required maximum sound level.
Ensure the End of Line resistor(s) are the correct value and connected in parallel with
the last loudspeaker on each loudspeaker line (on the line side of the DC Blocking
capacitor).
2
Disconnect the individual loudspeaker line(s) from the BVRDADIS module.
3
Using an impedance meter set to 1kHz, measure and record the impedance. Ensure
the load does not exceed the amplifiers rating.
4
Using a digital multi meter, measure and record the DC resistance. Divide this value
into 10,000 and ensure the result equals the number of End of Line resistors
connected.
5
Reconnect the line to the appropriate output terminals on the BVRDADIS module.
6
Repeat steps 1 to 5 for all lines to be connected to the BVRDADIS modules.
7
Set DIL SW2.1-2.5 to “OFF”.
8
Ensure the BVRDADIM is operating (LED1 Flashing) and wait approximately 60
seconds to allow the BVRDADIM to cycle through the calibration process for all lines.
9
Set SW2.5 to ‘ON’.
Press the Calibrate Switch (SW1) to set the calibrate reference for all 10 lines.
10 Set SW2.5 ‘OFF’ to enable normal operation.
Note: SW2.6 selects the CANBUS termination resistor. This is normally set to “OFF”.
Calibration (Selected Lines only)
To calibrate an individual pair of lines select the required lines using SW2.1 – 2.5 as shown
below and press the calibrate switch:
SW2
Lines
1
2
3
4
5
6
1 0 0 0 1 0 1A
&
1B
0 1 0 0 1 0 2A
&
2B
1 1 0 0 1 0 3A
&
3B
0 0 1 0 1 0 4A
&
4B
1 0 1 0 1 0 5A
&
5B
0 1 1 0 1 0 6A
&
6B
1 1 1 0 1 0 7A
&
7B
0 0 0 1 1 0 8A
&
8B
1 0 0 1 1 0 9A
&
9B
0 1 0 1 1 0 10A
&
10B
X X X X 1 0 All
lines
After calibrating return SW2.1 – 2.4 to the required address (as shown in the next section)
and ensure SW2.5 is set to “OFF”.
