PASCO POWER AMPLIFIER II User manual

Instruction Sheet
for the PASCO
Model CI-6552A
POWER AMPLIFIER II
012-05783A
2/95
$1.00
Phone [phone] • FAX [phone] • email: [e-mail]
10101 Foothills Blvd. • P.O. Box 619011 • Roseville, CA 95678-9011 USA
better
teach physics
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POWERAMPLIFIER II
CI-6552A
CAUTION!
CI-6552A
POWER AMPLIFIER II
ON
CAUTION!
SIGNAL OUTPUT
0to ±10 V
1 A MAX
WHEN LIGHT IS ON
WAVEFORM IS DISTORTED.
DECREASEAMPLITUDE!
© 1995 PASCO scientific
This instruction edited by Robert Morrison
Introduction
The PASCO CI-6552A Power Amplifier II is an acces-
sory to the PASCO Signal Interfaces, Series 6500 and
Mac65. It amplifies the output of the computer, allowing
it to be used as a controlled DC power source or an AC
function generator.
With the Power Amplifier II plugged into one of the ana-
log channels of the Signal Interface, the appropriate soft-
ware (Power Amplifier for DOS, Power Amplifier for
APPLE II, or Science Workshop) can be used to generate
the following types of waves (up to ±10V peak at 1A, up
to 5,000 Hz):
• sine,
• square,
• triangle, and
• sawtooth.
This means the computer can now be used as an AC sig-
nal generator to power external circuits while it monitors
its own output current as well as other inputs. The Science
Workshop software can also generate a DC output.
Filter Select Switch
The CI-6552A Power Amplifier II has a filter select
switch which is preset for use with the CI-6560 Signal
Interface II (Mac65). The bandwidth at that switch posi-
tion is about 100KHz, limited by the power amplifier’s
feedback compensation section and the load. When using
the Power Amplifier II with the CI-6510 Signal Interface
(Series 6500), the bandwidth needs to be limited to
1.5KHz. To change the switch position push the filter se-
lect switch in the back panel slot to the left, as shown in
the illustration below.
Switch position
for CI-6510
Signal Interface
Switch position
for CI-6560
Signal Interface II

2
Power Amplifier II 012-05783A
Using Power Amplifier II
To install the Power Amplifier II, plug in its power cord
and plug the DIN plug into Channel A, B, or C of the ap-
propriate PASCO Signal Interface box (CI-6510 or
CI-6560).
➤NOTE: Using Power Amplifier II with Series
6500, the Power Amplifier program is calibrated for
channel C. The Power Amplifier II can also be
plugged into Channel A or B but these channels are
not automatically calibrated to read the current as is
Channel C.
To use the output of the Power Amplifier II, connect the
load to the banana jacks on the front of the Power Ampli-
fier II. There is a power switch on the back left hand cor-
ner of the Power Amplifier II.
➤WARNING! Do not turn on the power switch
until a program (either Power Amplifier, Data
Monitor or Science Workshop) has been run and the
desired output voltage has been selected.
When the computer is in DOS, the Power Amplifier
will output 10 Volts if the power switch is on and
this could overload a circuit that might be con-
nected to it. The software controls this voltage:
The Data Monitor Program sets the default voltage
to zero and the Power Amplifier Program sets the
default AC peak voltage to 5 Volts.
When the Power Amplifier II is operating, a green power
indicator light on the front panel of the Power Amplifier
II will be lit. There is also a red current overload light
which comes on whenever the maximum current of 1 A is
exceeded. If this warning light is on, the waveform is dis-
torted and you should reduce the output voltage.
Limited Warranty
PASCO scientific warrants this product to be free from
defects in materials and workmanship for a period of one
year from the date of shipment to the customer. PASCO
will repair or replace, at its option, any part of the product
which is deemed to be defective in material or workman-
ship. This warranty does not cover damage to the product
caused by abuse or improper use. Determination of
whether a product failure is the result of a manufacturing
defect or improper use by the customer shall be made
solely by PASCO scientific. Responsibility for the return
of equipment for warranty repair belongs to the customer.
Equipment must be properly packed to prevent damage
and shipped postage or freight prepaid. (Damage caused
by improper packing of the equipment for return ship-
ment will not be covered by the warranty.) Shipping costs
for returning the equipment, after repair, will be paid by
PASCO scientific.
Equipment Return
Should this product have to be returned to PASCO scien-
tific, for whatever reason, notify PASCO scientific by let-
ter or telephone BEFORE returning the product. Upon
notification, the return authorization and shipping instruc-
tions will be promptly issued.
➤NOTE: NO EQUIPMENT WILL BE AC-
CEPTED FOR RETURN WITHOUT AN AU-
THORIZATION.
CAUTION
RISK OF ELECTRIC SHOCK
DO NOT OPEN
CAUTION:
TO PREVENT THE RISK OF ELECTRIC SHOCK, DO
NOT REMOVE COVER ON UNIT. NO USER SERVICE-
ABLE PARTS INSIDE. REFER SERVICING TO QUALI-
FIED SERVICE PERSONNEL.
Thelightningflashwitharrowhead,within
anequilateral triangle,isintendedtoalert
the user of the presence of uninsulated
“dangerous voltage” within the product’s
enclosurethatmaybeofsufficientmagni-
tudetoconstituteariskofelectricshockto
persons.
The exclamation point within an equi-
lateral triangle is intended to alert the
userofthe presenceof importantoper-
ating and maintenance (servicing) in-
structions in the literature accompany-
ing the appliance.