PASCO WA-9612 RESONANCE TUBE - Manual (Page 7)

012-03541E Resonance Tube
3
Using the Power Amplifier:
Connect the Power Amplifier DIN plug to channel C
of the Interface. Connect the output of the Power
Amplifier to the resonance tube speaker, but DO NOT
TURN THE POWER AMPLIFIER ON UNTIL YOU
HAVE SET THE OUTPUT AMPLITUDE FROM
WITHIN THE PROGRAM.
Connect the BNC plug on the resonance tube micro-
phone to the BNC jack on the CI-6508 Input Adapter
Box, and the DIN plug on the Adapter Box to channel
A of the Interface. Turn the amplification select switch
on the CI-6508 to 100x. (See Figure 3.)
Start the program. (Consult your
manual for details on the opera-
tion of the program if necessary.) Set the output
to a 1 V sine wave, then turn the CI-6502
Power Amplifier on. Show channel A and
channel C on the screen, so you can see both
the speaker output and the waveform in the
tube.
Using a Function Generator:
Connect the BNC plug on the Resonance tube micro-
phone to the BNC jack on the CI-6508 Input Adapter
Box, and the DIN plug on the Adapter Box to channel
A of the Series-6500. Turn the amplification select
switch on the CI-6508 to 100x.
If you have a CI-6503 Voltage Sensor, use it to link
the function generator and channel B of the CI-6500.
(This step is optional; it allows you to use the function
generator for triggering, with slightly improved
results.) See Figure 4.
Start the program. (Consult your manual for details on
the operation of this program if necessary.) In oscillo-
scope mode, set triggering to automatic
on channel B. Show channels A and B
on the screen, and find the resonances you are
interested in. If you wish, turn on the fre-
quency analysis option (FFT) and observe the
frequencies that are contributing to the stand-
ing wave.
(*Available only for the Macintosh
®
and for the
MS
-
DOS version of the Data Monitor.)
➤ NOTE: In most textbooks, an open tube is
considered to be a tube that is open at both ends.
A closed tube is considered to be a tube that is
closed at one end and open at the other. In
keeping with this convention, the speaker and
microphone should be postioned several centime-
ters back from the end of the tube, so the micro-
phone/speaker end of the tube is open.
If a resonance mode is excited in the tube, a pressure
antinode (a displacement node) will always exist at a
closed end of the tube. An open end of the tube
corresponds, more or less, to a pressure node (a
displacement antinode). However, the pressure node
will, in general, not be located exactly at the end of the
tube. You can investigate the behavior of the sound
waves near the open end using the microphone.
Using the Resonance Tube with the
PASCO Series 6500 Computer Interface
There are two ways of using the PASCO Series-6500
Computer Interface with the resonance tube, depend-
ing on whether you intend to drive the resonance tube
with the CI-6502 Power Amplifier or with a separate
function generator.
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WA-9612
RESONANCE TUBE
13 13
SPEAKER INPUT
.1 W MAX
1 2 3 4
DIGITAL CHANNELS
ANALOG CHANNELS
A ▲ B ■ C ●
ON
GAIN = 1,10,100 ISOLATED GAIN = 1 ISOLATED GAIN = 1 REF TO GND INTERFACE SYSTEM
PASCO
6500 SERIES
CI-6510 SIGNAL INTERFACE FOR USE WITH PASCO SERIES 6500 SENSORS GAIN SELECT
NOTE: SWITCH FUNTIONS ONLY WHEN ADAPTOR IS CONNECTED TO INPUT MARKED ▲ ON THE
SIGNAL INTERFACE
X 100
X 10
X 1
INTERFACE SYSTEM
PASCO 6500 SERIES
ANALOG INPUT ( ± 10V MAX)
INPUT ADAPTOR
FOR USE WITH PASCO SERIES 6500 INTERFACES
Model CI-6508
T T L
H I Ω
G N D
L O Ω
M I N
R A N G E
A D J U S T
M A X
O U T P U T F R E Q U E N C Y
A M P L I T U D E
P I - 9 5 8 7 B
D I G I T
A L F U N C T I O N
G E N E R A T O R - A M P L I F I E R
H E RT Z
W AV E F O R M
I N P U T G N D
E X T E R N A L
ON
OFF
ON
OFF
1 2 3 4 5 6 7 8 9 10 11 12 13 14 1 2 3 4 5 6 7 8 9 10 11 12 13 14
WA-9612 RESONANCE TUBE
13 13
SPEAKER INPUT
.1 W MAX
1 2 3 4 DIGITAL CHANNELS
ANALOG CHANNELS
A ▲ B ■ C ●
ON
GAIN = 1,10,100 ISOLATED GAIN = 1 ISOLATED GAIN = 1 REF TO GND INTERFACE SYSTEM
PASCO
6500 SERIES
CI-6510 SIGNAL INTERFACE
FOR USE WITH PASCO SERIES 6500 SENSORS
CI-6502 POWER AMPLIFIER FOR USE WITH PASCO SERIES 6500 INTERFACES
ON
+
INTERFACE SYSTEM
PASCO
6500 SERIES
SIGNAL OUTPUT
0 to ± 10 V 1 A MAX CAUTION!
WHEN LIGHT IS ON
WAVEFORM IS DISTORTED.
DECREASE AMPLITUDE!
GAIN SELECT
NOTE: SWITCH FUNTIONS ONLY WHEN ADAPTOR IS CONNECTED TO INPUT MARKED ▲ ON THE
SIGNAL INTERFACE
X 100 X 10
X 1
INTERFACE SYSTEM
PASCO 6500 SERIES
ANALOG INPUT ( ± 10V MAX)
INPUT ADAPTOR FOR USE WITH PASCO SERIES 6500 INTERFACES
Model CI-6508
ON
OFF
ON
OFF
Figure 4
Figure 3