Bosch Integrus Installation And Operation Manual page 60

60 en | Configuration
Radiator
number
1
2
3
4
5
Table 7.1 Calculation of the cable signal delays
NOTICE!
The used cable signal delay per meter is an example. Use the actual signal delay per meter in
this calculation as specified by the manufacturer.
Determining delay switch positions by using a delay measuring tool
The most accurate way to determine the cable signal delays is to measure the actual signal
delay for each radiator as described in the following procedure:
1.
2.
3.
4.
5.
6.
7.
8.
9.
10. Add delay switch positions to radiators under a balcony, if applicable (see section 7.4.3 )
11. Set the delay switches to the calculated delay switch positions.
CAUTION!
Turn the delay switches carefully to a new position until you feel that it clicks into position, to
prevent that a switch is positioned between two numbers, which would result in a wrong
delay setting.
Figure 7.4 and Table 7.2 illustrate the calculation of the signal delays and the delay switch
positions.
IOM-INT | V1.1 | 2010.12
Total cable Cable signal
length [m] delay per
meter [ns/m]
30 5.6
30+20=50 5.6
20 5.6
30 5.6
30+20=50 5.6
Disconnect the cable from a radiator output of the transmitter and connect this to a
delay measurement tool.
Disconnect a radiator from this cable.
Measure the impulse response time (in ns) of the cable(s) between the transmitter and
the radiator.
Reconnect the cable to the radiator and repeat steps 2 to 4 for the other radiators that
are connected to the same transmitter output.
Reconnect the cable t the transmitter and repeat step 1 to 5 for the other radiator
outputs of the transmitter.
Divide the impulse response times for each radiator by two. These are the cable signal
delays for each radiator.
Determine the maximum signal delay.
Calculate for each radiator the signal delay difference with the maximum signal delay.
Divide the signal delay difference by 33. The rounded off figure is the delay switch
position for that radiator.
Installation and Operation manual
Cable signal Signal delay
delay [ns] difference
[ns]
30*5.6 = 168 280-168=112
50*5.6 = 168 280-208=0
20*5.6 = 168 280-112=168
30*5.6 = 168 280-168=112
50*5.6 = 168 280-280=0
Integrus
Delay switch
position
112/33=3.39=3
0/33=0
168/33=50.9=5
112/33=3.39=3
0/33=0
Bosch Security Systems B.V.