A.W. Sperry Instruments SP-152A Operating Instructions Manual
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A.W. Sperry Instruments SP-152A Operating Instructions Manual

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Form #245
OPERATING INSTRUCTIONS
Model SP-152A
POCKET SIZE MULTLTESTER
PLEASE READ THESE OPERATING INSTRUCTIONS CAREFULLY
Misuse and or abuse of these instruments cannot be prevented by any
printed word and may cause injury and or equipment damage. Please
follow all these instructions and measurement procedures faithfully and
adhere to all standard industry safety rules and practices.
A.W. SPERRY INSTRUMENTS INC.
245 MARCUS BLVD., HAUPPAUGE, NEW YORK 11788
Phone: 800-645-5398 Toll Free (N.Y. and Alaska call collect 516-231-7050)
Fax: 516-434-3128

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  • Page 1 Please follow all these instructions and measurement procedures faithfully and adhere to all standard industry safety rules and practices. A.W. SPERRY INSTRUMENTS INC. 245 MARCUS BLVD., HAUPPAUGE, NEW YORK 11788 Phone: 800-645-5398 Toll Free (N.Y. and Alaska call collect 516-231-7050)

  • Page 2: Table Of Contents

    CONTENTS Section Title Page INTRODUCTION SAFETY PRECAUTIONS INSTRUMENT DATA 3-1 Description 3-2 Features 3-3 Specifications 3-4 Packaging 3-5 Front Panel Identification PREPARATION FOR USE OPERATION 5-1 Voltage Measurement 5-2 Current Measurement 5-3 Resistance Measurement 5-4 Battery Measurement MAINTENANCE 6-1 Battery Replacement 6-2 Fuse Replacement 6-3 Cleaning RETURN FOR REPAIR...
  • Page 3 A.W. Sperry Instruments, Inc., shall be the sole judge of such defect. The liability of A.W. Sperry Instruments, Inc., shall be limited to the repair or replacement at its sole option of any defective product.

  • Page 4: Introduction

    If you should have any questions regarding this product or would like a catalog on our other products please write to us at: A.W. Sperry Instruments, Inc. P.O. Box 9300 Smithtown, NY 11787 or call us Toll-Free at...

  • Page 5: Instrument Data

    Don’t become part of the circuit. Think Safety. Act Safely. Sec. 3 INSTRUMENT DATA 3-1) Description The A.W. SPERRY SP-152A is an Analog Multimeter capable of: Measuring 7 functions on 20 ranges. A mirror scale is provided to reduce the possibility of parallax errors. Small, light weight and rugged construction.

  • Page 6: Specifications

    8. Battery Test Function 9. Handy Tiltstand/ Carry Handle 10. Perfect for the Homeowner, Hobbyist and Professional 3-3) Specifications Sensitivity: 20KΩ/VDC, 9KΩ/VAC Accuracy: DC ± 3% Full Scale AC ± 4% Full Scale Ω ± 3% Arc Length Fuse: One (1) 1/2 Amp. 250V, 1/4" X 11/4", A.W.

  • Page 7: Preparation For Use

    SP-152A and the red test lead into the “+” (V-Ω-A) terminal. Make certain that the leads are seated all the way into the SP-152A and fit snugly. If the fit feels loose do not use the SP-152A or the test leads. Refer to sec. 7.

  • Page 8: Operation

    6. Please the selector switch on the SP-152A into the “X1K” position, hold the tips of the Red and Black test leads together and adjust the “OHMS adjust knob” until the meter movement pointer reads “0” on the OHMS scale located at the extreme right side of the scale plate.

  • Page 9: Current Measurement

    4. Apply the test leads to the two points in the circuit at which the voltage is to be measured. When measuring DC voltage the black lead should be connected to the more negative point of measurement. When measuring AC voltage the polarity does not matter.
  • Page 10 CAUTION The 20A range is unprotected and has a very low internal resistance. Do not attempt to take a current measurement if the current is unknown or above 20Adc. WARNING The instrument must be connected in series with the circuit to be measured.

  • Page 11: Resistance Measurement

    the test leads from the circuit under test, then remove the test leads from the instrument. 5-3) Resistance Measurements 1. Follow the Preparation for Use procedure in sec. 4. 2. Read all safety precautions in sec. 2. CAUTION Resistance measurements must be made on de-energized (dead) circuits only.

  • Page 12: Battery Measurement

    5-4) Battery Measurements 1. Follow the Preparation for use procedure in sec. 4. 2. Read all safety precautions in sec. 2. 3. The SP-152A comes with two separate battery check ranges that enable you to test 1.5Vdc or 9Vdc batteries.

  • Page 13: Fuse Replacement

    2. Turn instrument upside down and lay on a soft flat surface which will not scratch the scale window. 3. Remove the phillips head screw and lift off the back case. 4. Remove the battery by prying up near the center of the battery using a coin.

  • Page 14: Return For Repair

    2. open test leads. If these conditions do not exist and the instrument still fails to operate properly or is damaged, return the instrument and accessories prepaid to: A.W. Sperry Instruments, Inc. Attn: Customer Service Dept. 245 Marcus Boulevard Hauppauge, NY 11788 State in writing what is wrong with the instrument.
  • Page 15 Note: Subsequent revisions to this document may exist. Use for general references only.
  • Page 16 A.W. SPERRY INSTRUMENTS INC. 245 MARCUS BLVD., HAUPPAUGE, NEW YORK 11788 Phone: 800-645-5398 Toll Free (N.Y. and Alaska call collect 516-231-7050) Fax: 516-434-3128...

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