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

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A.W. Sperry Instruments SP-152A Operating Instructions Manual Download Page 5

Never take resistance measurements on energized(live)
electrical or electronic equipment.

Use one hand, instead of two, whenever possible to take
measurements.  If two hands must be used, use extreme
caution not to contact any energized conductors with your
hands.  Be certain test lead probes are dry and clean.

Do not hold the instrument when taking measurements.
Place the instrument on a clean, insulating surface prior to
taking any measurement.

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. This meter was
designed for the amateur, hobbyist and professional
needing to make electrical and electronic equipment
measurements.

3-2) Features 

1. 7 Functions - 20 Ranges

2. Limited One Year Warranty

3. Ruggedized, Impact Resistant

4. Industry Standard Safety Recessed Input 
Terminals and Shielded Banana Plugs

5. Mirrored Scale Plate

6. Safety Fuse Protected

7. Diode Protected Meter Movement

3

10

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. 

4. Connect red probe to + Jack, black to - Jack.

5. Set the range selector switch to 9V battery check 
range.

6. Connect the test leads to the 9Vdc battery under 
test.  A good 9Vdc battery will read in the green 
portion of the Arc.

7. To check 1.5Vdc batteries follow the above 
procedures with the range selector switch set to 
the 1.5Vdc range.

8. The “?” section on the scale plate shows that the 
battery may be starting to decay.

SYMBOLS

V

DIRECT VOLTAGE (DCV)

V~ 

ALERATIVE VOLTAGE (ACV)  

MA

DIRECT CURRENT (DcmA)

EARTH (GROUND) TERMINAL

DOUBLE INSULATION

Sec. 6  MAINTENANCE

6-1) Battery Replacement

WARNING:

To avoid electric shock, disconnect

measuring terminals before removing cover.

1. Disconnect test leads form any circuit and then 
disconnect test leads from the instrument.

—

…

—

…

!

Summary of Contents for SP-152A

Page 1: ... N Y and Alaska call collect 516 231 7050 Fax 516 434 3128 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 ...

Page 2: ...3 3 Specifications 4 3 4 Packaging 4 3 5 Front Panel Identification 4 PREPARATION FOR USE 5 5 OPERATION 6 5 1 Voltage Measurement 6 5 2 Current Measurement 7 5 3 Resistance Measurement 9 5 4 Battery Measurement 10 6 MAINTENANCE 11 6 1 Battery Replacement 11 6 2 Fuse Replacement 11 6 3 Cleaning 12 7 RETURN FOR REPAIR 12 N ...

Page 3: ...nts and proof of purchase in the form of a legible copy or original of the sales receipt clearly identifying the distributor model number and date of purchase must be returned to A W Sperry Instruments Inc Attention Customer Service Center 245 Marcus Boulevard Hauppauge New York 11788 postage prepaid for examination and verification of manufacturing defect under warranty A W Sperry Instruments Inc...

Page 4: ...ke the time to read these operating instructions thoroughly and completely Failure to follow these instructions may result in electrical shock instrument damage and or damage to the equipment under test Always use extreme caution when working on or around electrically operated equipment Sec 2 SAFETY PRECAUTIONS Always inspect the instrument test leads and other accessories for damage prior to ever...

Page 5: ... 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 This meter was designed for the amateur hobbyist and professional needing to make electrical and electronic equipment mea...

Page 6: ... 5V AA size batteries A W SPERRY part No B 1 Size 5 4 H x 3 7 W x 1 8 D 137 x 95 x 45mm Weight 9 5 oz 270 g Ranges and Accuracy DC Voltage 0 2 5 10 50 250 1000 Vdc AC Voltage 0 10 50 250 1000 Vac DC Current 0 5m 50m 500mA 20Adc Resistance 0 10K 100K 10MΩ 50 500 50KΩ Mid Scale Battery 1 5V 9Vdc Continuity Buzzer Decibels 8 to 62dB 3 4 Packaging Comes complete with one set TL 56 Test Leads two B 1 A...

Page 7: ...20 positions and has no excessive play in each position Do not use if the switch is loose Refer to sec 7 3 Inspect the TL 56 test leads for any signs of damage Check for cracks in the insulation broken or damaged probes loose probe pins or bent probe pins Do not use if any abnormal conditions exist Refer to sec 7 4 Place the SP 152A Analog Multimeter on a flat horizontal surface Using a small scre...

Page 8: ...anges with a weak dead or missing battery 7 The SP 152A is now ready for use Follow the Measurement procedures in this manual for all measurements Read all Safety Precautions in sec 2 before proceeding Sec 5 OPERATION 5 1 Voltage Measurements 1 Follow the Preparation for Use procedure in sec 4 2 Read all Safety Precautions in sec 2 CAUTION 1000 Vac dc is the maximum voltage that can be measured us...

Page 9: ...switch 7 The dB scales can be used to measure the milliwatt power dissipation in a 600 load by measuring the AC voltage across a 600 OHM load An AC voltage of 0 775 Vrms across 600 OHMS is equal to 1mW or 0 dB When converting an AC voltage measurement to dB take the dB readings from the lowest arc on the scale plate and then add the appropriate dB correction as listed in the chart printed in the l...

Page 10: ...urrent is to be measured The current should enter through the red lead and leave through the black lead in order for the meter to indicate in an up scale direction 7 Turn on power to the circuit under test Read the current on the black DC scale and use the full scale numbers which correspond to the range selected in the case for the 20A range 0 20 WARNING Before changing ranges always de energize ...

Page 11: ... the range desired Hold the test lead tips together and adjust for a 0 ohm reading using the 0Ω adj knob If a zero reading cannot be obtained a weak battery is the most probable cause See section 6 1 Battery Replacement 4 Connect the instrument to the points between which the resistance is to be measured Read the resistance on the uppermost OHMS scale Multiply the reading by the range the selector...

Page 12: ... battery under test A good 9Vdc battery will read in the green portion of the Arc 7 To check 1 5Vdc batteries follow the above procedures with the range selector switch set to the 1 5Vdc range 8 The section on the scale plate shows that the battery may be starting to decay SYMBOLS V DIRECT VOLTAGE DCV V ALERATIVE VOLTAGE ACV MA DIRECT CURRENT DcmA EARTH GROUND TERMINAL DOUBLE INSULATION Sec 6 MAIN...

Page 13: ... tighten screw 6 2 Fuse Replacement 1 Follow steps 1 3 in Section 6 1 2 Remove the fuse and replace with a miniature glass type fuse 1 2 Amp 250V 1 4 X 11 4 A W SPERRY Part F 1 or approved equal CAUTION Do not short fuse out of the circuit or use a fuse with higher rating than 1 2 Amp or alter circuit to eliminate the fuse These actions negate the safety purpose of the fuse can cause extensive dam...

Page 14: ... 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 If the warranty period is still in effect you must include your name address and phone number Repair estimates will be furnished if requested for out of warran...

Page 15: ...Note Subsequent revisions to this document may exist Use for general references only 13 ...

Page 16: ...1 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 P M p f a ...

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