BRUEL & KJAER 1618 - Page 26

Input
N ot u sed
Manual
In this measurement mode, which is possible when a Measuring Amplifier Type 2607
(or equivalent) is employed, band switching, paper synchronization and transport, and
Amplifier averaging times are all controlled by the programs in the Band Pass Filter.
Level Recorder 2306
with just 7 pin control plug
Lev el Recorder 2306
with two control plugs
Measuring Amplifier 2607
Band Pa ss Filter 1617
E~~~rc:=~ ID1J . ' ~ .
7 pin 8 pin plug
~ ~~
:;- . -,;
I I ~
~ _______ AQ. 0~8~ __________ AQ Q.0~4j
AO 0064
770358
Fig. 3.7. Instrumentation using Type 2306 and Type 2607 to plot
spectrograms with variable averaging time
1. Connect the instrumentation as shown in Fig .3. 7, which is similar to Fig .3 .5 with
the addition of the 15-lead Connection Cable AO 0145 to the AVERAGING TIME
CONTROL
socket.
Note
that program control of the Type 2607 averaging time is only possible when it
has a ground connection with the Type 1617 . This is automatically achieved when
the Filter input and output cables are connected to the Amplifier.
The external connections to the AVERAGING TIME CONTROL socket on the Type
1617 and the internal connections and control functions are indicated in Fig .3 .B.
2 .
Adjust the Measuring Amplifier as described in section 3 .3.1 12 with the following
changes:
METER
FUNCTION "Linear"
AVERAGING TIME
(front panel)
"300 seconds"
AVERAGING TIME
(rear panel) " Remote"
Averaging Times
15
0,1 s
15
0,1 s
7
7
0,3 s
14
0,3 s
14
6
6
1,0 s
13
1,0 s
13
5
To
RMS circuit
5
3s
3 s
Not u
sed
12
El ec tronic Switch
12
in Type 2607
for remote se lection
4
Measuring
Amplifier 4
10 s
of ave raging time
11
10 s
11
in Me asuring
3
Amplifier 2607
3
30 s
10
30
s
10
2
2
100 s
9
100 s
9
1
0
770359
770360
Fig.3.B. External and internal connections in the AVERAGING TIME
21