PASCO SF-9568A User Manual

Instruction Sheet
for the PASCO
Model SF-9568A

Student Voltmeter

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Introduction

The PASCO Model SF-9568A Student Voltmeter is a
rugged yet sensitive instrument, designed specifically for
student experiments. It has three ranges and is switch
selectable by input jack to measure AC and DC values.

CE

Voltmeter

0

30

20

10

30

15

3

V

0

SF-9568A

Zero Adjust

Screw

Operation

To zero the meter:

Place the meter in the position (vertical or horizontal)
in which it will be used. Disconnect the meter. Use a
small, standard blade screwdriver to turn the Zero Adjust
Screw (located on the case, below the meter) until the
meter needle is aligned with the zero on the scale.

② Determine the range – For both AC and DC mea-

surements, voltage may be measured in one of
three ranges: 3, 15 and 30 Volts. The range is se­lected by plugging test leads (not included) into the
appropriate input jack.

➤ NOTE: To protect the meter, always choose a
range that is higher than the highest voltage you
might expect in the circuit.

③ Attach leads to the circuit points between which

you wish to measure the voltage.

For AC measurements –

Plug one lead of the circuit into the black input jack
and the other into the red input jack of the appropri­ate range.

For DC measurements –

Connect the leads in such a way that positive cur­rent flows into the black (0) connector on the Volt­meter .

30 V

15 V

Circuit

➤ NOTE: If the meter is mechanically zeroed
in one position, and then the position is changed,
it may need to be zeroed again.

To measure voltage:

① Set the selection switch for AC or DC current. (The

AC setting will provide RMS (root mean square)
readings for alternating current circuits.)

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3 V

Direction of

0

➃ Now you can read the voltage on the meter. A full

swing of the needle corresponds to the value in the
chosen range selection (i.e., On the 3 V range, a
reading of 20 on the upper scale indicates a voltage
of 2.0 volts.).

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current flow

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Specifications

Ranges (DC and AC): 0 to 3 V, 15 V and 30 V
Accuracy: ± 2% of full scale
Scale length: 6.2 cm
Sensitivity: 10kΩ/V
Frequency Response (AC): 20 Hz to 50 KHz, ± 3db
Impedance: 0-3 V 30 kΩ/V

0-15 V 150 kΩ/V

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.

012-08015A

To Reach PASCO

For technical support, call us at 1-800-772-8700
(toll-free within the U.S.) or [phone].

fax: [phone]

e-mail: [e-mail]

web: www.pasco.com

Schematic SF-9568A

2