PASCO SF-9211 User Manual
Instruction Manual and
Experiment Guide for
the PASCO scientific
Model SF-9211
STROBOSCOPE
012-02119C
5/94
© 1991 PASCO scientific $5.00
Stroboscope 012-02119C
CAUTION
RISK OF ELECTRIC SHOCK
DO NOT OPEN
The lightning flash with arrowhead,
within an equilateral triangle, is intended
to alert the user of the presence of
uninsulated “dangerous voltage” within
the product’s enclosure that may be of
sufficient magnitude to constitute a risk
of electric shock to persons.
CAUTION:
TO PREVENT THE RISK OF
ELECTRIC SHOCK, DO NOT
REMOVE BACK COVER. NO USER
SERVICEABLE PARTS INSIDE.
REFER SERVICING TO QUALIFIED
SERVICE PERSONNEL.
The exclamation point within an equilateral triangle is intended to alert the
user of the presence of important
operating and maintenance (servicing) instructions in the literature accompanying the appliance.
012-02119C Stroboscope
T able of Contents
Section Page
Copyright, Warranty, and Equipment Return..................................................ii
Introduction .....................................................................................................1
Features............................................................................................................1
Operation .........................................................................................................2
General Operation
Using the External Trigger
Using the Stroboscope as a Tachometer
Maintenance.....................................................................................................3
Specifications...................................................................................................3
Parts List ..........................................................................................................4
Component Layout ..........................................................................................5
Schematic....................................................................................................... 6,7
Schematic (LED) .............................................................................................8
i
Stroboscope 012-02119C
Copyright, Warranty and Equipment Return
Please—Feel free to duplicate this manual
subject to the copyright restrictions below.
Copyright Notice
The PASCO scientific Model SF-9211 Stroboscope
manual is copyrighted and all rights reserved. However,
permission is granted to nonprofit educational institutions
for reproduction of any part of this manual providing the
reproductions are used only for their laboratories and are
not sold for profit. Reproduction under any other circumstances, without the written consent of PASCO scientific,
is prohibited.
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 workmanship. 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 shipment will not be covered by the warranty.) Shipping
costs for returning the equipment, after repair, will be
paid by PASCO scientific.
Equipment Return
Should the product have to be returned to PASCO
scientific for any reason, notify PASCO scientific by
letter, phone, or fax BEFORE returning the product.
Upon notification, the return authorization and
shipping instructions will be promptly issued.
ä
NOTE: NO EQUIPMENT WILL BE
ACCEPTED FOR RETURN WITHOUT AN
AUTHORIZATION FROM PASCO.
When returning equipment for repair, the units
must be packed properly. Carriers will not accept
responsibility for damage caused by improper
packing. To be certain the unit will not be
damaged in shipment, observe the following rules:
➀ The packing carton must be strong enough for the
item shipped.
➁ Make certain there are at least two inches of
packing material between any point on the
apparatus and the inside walls of the carton.
➂ Make certain that the packing material cannot shift
in the box or become compressed, allowing the
instrument come in contact with the packing
carton.
Credits
This manual edited by: Dave Griffith
Address: PASCO scientific
10101 Foothills Blvd.
Roseville, CA 95747-7100
Phone: (916) 786-3800
FAX: (916) 786-3292
email: techsupp@pasco.com
web: www.pasco.com
ii
012-02119C Stroboscope
Introduction
The PASCO Model SF-9211 Stroboscope provides
sufficient white light for strobe photography and for
"stopping the motion" during laboratory experiments. The
light is produced with a Xenon flash tube in a 14cm
diameter polished reflector. Flash rate is adjustable from
1-300 flashes per second and a digital display reads the
flash rate in either flashes per second or in RPM. For
added convenience, a threaded hole (1/4-20 UNC-2B) is
provided in the bottom of the unit for mounting the
stroboscope onto a tripod.
A variety of special features enhance the utility of this
stroboscope. For situations requiring synchronized flashes
to large or isolated areas (e.g. separate rooms), it is
possible to synchronize the strobe flashes of a number of
Model SF-9211 Stroboscopes. Each stroboscope
Features
produces a 5 volt output pulse with every flash. This
output may be used as an external trigger that will cause a
simultaneous flash in a second stroboscope. By using the
output signal from each stroboscope to trigger the strobe
flashes of another unit, any number of stroboscopes may
be synchronized.
The ability of the stroboscope to respond to an external
trigger also allows strobe flashes to be synchronized with
some external event. This feature can be used to provide
automatic adjustment of the flash rate in response to rate
changes in the event being observed. It can also insure a
photograph is taken at a critical instant when performing
strobe photography.
To trigger the stroboscope from an external event, a 3-50
volt pulsed signal will trigger the stroboscope.
Digital Display
(4-digit LCD)
Display
Selection
LED's
Display
Selection
Switch
Power Cord
Receptacle
FLASHES PER SECOND
R.P.M.
EXT. TRIG.
MODEL SF-9211
STROBOSCOPE
Output Receptacle
Flash Rate
Adjustment Knob
FLASH RATE
ADJUST
On/Off Switch
OFF
POWER
ON
OUTPUT EXT. TRIG.
5V 3-50V
1
External
Trigger
Receptacle
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