PASCO SF-9568A Manuel utilisateur

Instruction Sheet

for the PASCO

Model SF-9568A

012-08015A

8/01

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.

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.

➤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:

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

AC setting will provide RMS (root mean square)

readings for alternating current circuits.)

Student Voltmeter

②Determine 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 se-

lected 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.

③Attach 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 appropri-

ate range.

For DC measurements –

Connect the leads in such a way that positive cur-

rent flows into the black (0) connector on the Volt-

meter .

➃Now 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.).

SF-9568A

Voltmeter

Circuit

Direction of

positive

current flow

3 V

15 V

30 V

Zero Adjust

Screw

better

teach science

ways to

Phone (916) 786-3800 • FAX (916) 786-8905 • email: techsupp@PASCO.com

10101 Foothills Blvd. • P.O. Box 619011 • Roseville, CA 95678-9011 USA

012-08015A

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 mate-

rial 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.

To Reach PASCO

For technical support, call us at 1-800-772-8700

(toll-free within the U.S.) or (916) 786-3800.

fax: (916) 786-3292

e-mail: [email protected]

web: www.pasco.com

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

Schematic SF-9568A

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