PASCO SF-9585A User Manual
Instruction Sheet
for the PASCO
Model SF-9585A
HIGH VOLTAGE POWER SUPPLY
012-05725B
11/95
$1.00
HIGH VOLTAGE POWER SUPPLY
V
50 V ADJUST 500 V ADJUST
SF-9585A
DC
–
50 V
Introduction
The PASCO scientific Model SF-9585A High Voltage
Power Supply provides regulated DC power up to 50 mA
in two voltage ranges: 0 to -50 and 0 to 500 volts. The
outputs for the two ranges are independently adjustable,
though a single terminal is used as the positive terminal
for the 50 volt output and as the negative terminal for the
500 volt output. The meters read voltage and current in
either range.
In addition, a separate filament voltage supply provides
unregulated AC power up to 3 amperes at 2 to 7 volts.
Voltage selection for the filament supply is simply a matter of turning the voltage adjustment knob on the front
panel to the desired voltage.
+
500 V
0
ON/OFF
RESET
mA
500 V
HIGH
VOLT AGE
-
50 V
AC
4
3
2
3 A MAX
5
6
7
To Use the Power Supply:
➤ CAUTION—HIGH VOLTAGE:
• Play it safe: Always work with a partner.
• Wear rubber soled shoes.
• Work with one hand only. Keep the other hand in
your pocket or behind your back.
➀ Plug the power cord into a well-grounded 115
VAC, 60 Hz or 230 VAC, 50 Hz outlet. (See label
on rear of unit).
➁ Connect the appropriate output terminals of the power
supply to the circuit. (Connecting wires are not provided with the supply.) The -50 and 500 volt ranges,
as well as the filament supply, may all be used simultaneously.
➂ Turn the 50 VOLT ADJUST knob and the 500 VOLT
ADJUST knob fully counterclockwise.
© 1994 PASCO scientific
This instruction sheet edited by: Tom Reineking
®
10101 Foothills Blvd. • P.O. Box 619011 • Roseville, CA 95678-9011 USA
Phone (916) 786-3800 • FAX (916) 786-8905 • email: techsupp@PASCO.com
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High Voltage Power Supply 012-05725B
➃ Push the upper part of the ON/OFF switch on the front
panel to turn on the unit. The switch will light to show
that the power is on.
➄ To read the voltage and current between the -50V out-
CAUTION
RISK OF ELECTRIC SHOCK
DO NOT OPEN
put terminals push the meter select switch to the -50V
position. The LED will light. To read the voltage and
current between the 500 V terminals push the meter
select switch to the 500V position. The LED will
light.
CAUTION:
TO PREVENT THE RISK OF ELECTRIC SHOCK, DO
NOT REMOVE BACK COVER. NO USER SERVICEABLE
PARTS INSIDE. REFER SERVICING TO QUALIFIED
SERVICE PERSONNEL.
➅ With the meter set for the corresponding range, turn
the 50 VOLT ADJUST or the 500 VOLT ADJUST
knob to obtain the desired output.
Specifications
DC Output: 0 to -50 volts and 0 to 500 volts, inde-
pendently adjustable; up to 50 mA in
each range.
AC Output: 2 to 7 VAC; up to 3 amperes.
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.
RIPPLE: Less than 0.1%, ± 1 Digit
REGULATION: Less than 1% variation in output for a
combined variation in line and load of
up to 10%
➤ NOTE: All output circuits are protected against
current overload. If the power supply fails to come
on, or if it shuts down during operation because of a
current overload, check the fuses on the rear of the
supply. If the fuses are blown, replace them only
with similarly rated fuses.
FUSE: 1 Amp Slo-blo in 115V Models
500 mA Slo-blo in 230V Models
Other PASCO Power Supplies
PASCO scientific offers a variety of rugged, reliable
power supplies. From low-voltage, fixed-output supplies to a 6 KV DC supply, all PASCO power supplies
are easy to use, ruggedly built, and short circuit protected for long life in the student lab. For information,
check the current catalog.
To Reach PASCO
For Technical Support call us at 1-800-772-8700 (tollfree within the U.S.) or (916) 786-3800.
email: techsupp@PASCO.com
Tech support fax: (916) 786-3292
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.
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.
2
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