Form # 146-2
OPERATING INSTRUCTIONS
A.W. SPERRY INSTRUMENTS INC.
245 MARCUS BLVD., HAUPPAUGE, N.Y. 11788
U
L
®
C
U
L
®
MODEL SP-5A
13 Range Analog Multimeter
Shown 1/2
Actual size
o
CONTENTS
Sec.
1) Introduction
2) Safety Precautions
3) Instrument Data
3-1 Description
3-2 Features
3-3 Specifications
3-4 Packaging
3
-5 Front Panel
Identification
4) Preparation for Use
5) Operation
5-1 Voltage Measurement
5-2 Current Measurement
5-3 Resistance Measurement
6) Maintenance
6-1 Battery Replacement
6-2 Fuse Replacement
6-3 Cleaning
7
) Return for Repair
ONE YEAR LIMITED WARRANTY
A.W. Sperry Instruments, Inc., warrants that this AWS
instrument has been carefully tested, inspected and warranted
for one (1) year from the date of purchase by the original end
user, provided the instrument has not been misused, damaged
due to negligence, neglect or unauthorized repair, abused or
used contrary to the operating instructions. Instruments 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
d
efect under warranty. A.W. Sperry Instruments, Inc. shall be
limited to the repair or replacement at its sole option of any
defective product.
2 3 4 5 6 7
1) INTRODUCTION
Congratulations. You have purchased an AWS Analog Multimeter
manufactured to the highest quality standards. A minimum amount of
maintenance and an understanding of these operating instructions is
all that is needed to keep this instrument in excellent working condition.
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, N.Y. 11787
Or call us Toll-Free at 800-645-5398 (N.Y., Hawaii, Alaska call collect
631-231-7050).
Please take 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.
2
) SAFETY PRECAUTIONS
A
lways inspect the instrument, test leads and other accessories for
damage prior to every use.
Always consider electrical and electronic equipment to be energized
(live). Never assume any equipment is de-energized.
Never ground yourself when taking electrical measurements, isolate yourself from ground by using dry rubber insulating mats to
cover all
exposed grounded metal. Stand on rubber mats and wear dry
clothing.
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
i
nstrument on a clean, insulating surface prior to taking any measurements.
D
on’t become part of the circuit. Think Safety. Act Safely.
3
) INSTRUMENT DATA
3-1) Description
The AWS SP-5A is an Analog Multimeter capable of measuring 5
functions on 13 ranges. A mirror scale is provided to reduce the
p
ossibility of paralex errors. Small lightweight and rugged
construction. This meter was designed for the homeowner, hobbyist
and professional needing to make electrical and electronic
equipment measurements.
3-2) Features
UL Listed to U.S. and Canadian Safety Standards.
1) 5 Functions – 13 Ranges
2) High Impact Thermoplastic Case
3
) Diode Protection Meter Movement
4) Mirrored Scale
5) Small Pocket Size
6) Safety Recessed Test Lead Connections
7) 2” Scale Plate
8) db Scale
3-3) Specifications
Sensitivity: 2 K W/V AC/DC
Fuse: One (1) 0.25 Amp. 250V
5mm x 20mm AWS Part # F-16
Power Source: One (1) 1.5V AA size battery
A
WS Part no. B-1
Size: 1-3/16” D x 2-3/8” W x 3-1/2” H
Weight: 3.7 oz. (including battery)
Operating Environment: 0° to 50°C (32° to 122° F)
Max RH 80% at 31° C decreasing
linearly to 50% RH at 40° C.
Instrument complies with installation category (over voltage
category II). Pollution degree 2 in accordance with IEC 664 indoor
use. If the equipment is used in a manner not specified, the
protection provided by the equipment may not be impaired.
Ranges and Accuracy
DC Voltage:
0-10/50/250/500 Vdc, ±4% F.S.
A
C Voltage:
0
-10/50/250/500 Vdc, ±5% F.S.
DC Current: 0-0.5/50/250 mAdc, ±4% F.S.
Resistance: 0-1MΩ (5K W mid scale), ±4% F.S.
D
ecibels:-20 to +56db (on ACV ranges)
o
o
DOUBLE INSULATION
∆
!
WARNING: To avoid electric shock, disconnect measuring
terminals before removing back cover.
∆
!
AVIS: Pour eviter ie choc electrique, debrancher les bournes
de meaure avant d’ enlever le capotage arriere.
CAUTION: For continued protection against fire, replace only with
fuse of the specified voltage, current and rupture speed ratings.
ATTENTION: Pour la protection continue contre le fue, remplaceer
uniquement avec un fusible du meme avec un fusible du meme
voltage, courent et vitesse.
3-4) Packaging
Comes complete with one set TL-34 Test leads, one B-1 “AA” type
Battery (installed in the instrument), one F-16 fuse (installed) and
Form # 146-2 Operating Instructions.
3-5) Front Panel Identification
4
) PREPARATION FOR USE
This procedure should be followed before each and every use.
CAUTION
Before attempting to use this meter be certain to read this
operating instruction thoroughly and completely. Failure
to follow these instructions may result in electrical shock,
instrument damage and/or damage to the equipment under
test.
1
) Inspect the SP-5A Analog Multimeter for any signs of
Damage to the thermoplastic case. Do not use if cracked,
distorted, excessively dirty or any other abnormal condition
e
xist. Refer to Sec. 7.
2
) Rotate the selector switch one full turn. Check that the
switch clicks into each of the 13 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-34 test leads for nay 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-5A Analog Multimeter on a flat horizontal surface.
Using a small screwdriver adjust the “zero adjust” screw until the
meter movement pointer lines up with the “0” reading on the left
side of the scale plate.
5) Insert the black test led into the “-” terminal of the SP-5A and the
red test lead into the “+” terminal. Make certain that the leads are
seated all the way into the SP-5A and fit snuggly. If the fit feels loose
do not use the SP-5A or the test leads. Refer to sec.7.
6) PLACE THE SELECTOR SWITCH ON THE SP-5A 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. If a “0” reading cannot be obtained, a weak
battery is the most probable cause. Follow the battery replacement
procedure in sec. 6-1.
Note: The SP-5A is now ready for use. Follow measurements with
t
he selector switch in the “ X1K” position. The SP-5A can be used
in all other ranges with a weak, dead or missing battery.
7) The SP-5A is now ready for use. Follow the Measurement procedures in this manual for all measurements. Read all safety
Precautions in sec.2 before proceeding.
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
500 Vac/dc is maximum voltage that can be measured using
this meter. Attempting to measure higher voltages may result in
electrical shock, instrument damage and/or damage to equipment under test.
3) Select an AC or DC voltage range using the selector switch that
is higher than the maximum voltage to be measured. If the maximum voltage may be higher than 500 Vac/dc, do not attempt to
8 9 10 11
take a 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.
5) Read the AC or DC voltage using the V-MA scale directly below
the mirror scale. Use the numbers whose full-scale reading matches the range selected by the “Selector Switch”. When using the
10Vac range the readings must be taken from the red scale marked
AC10V.
6) The dB scales can be used to measure the milliwatt power dissip
ation 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 reading from the lowest arc on the scale plate and
then add the appropriate dB correction as listed in the chart printed
in the lower right corner of the instrument scale plate.
5-2) DC Current Measurement
1) Follow the Preparation for Use procedure in sec.4.
2) Read all Safety Precautions in sec.2.
CAUTION
250 mAdc is the maximum current that can be measured using
this meter. The instrument must be connected in series with the
circuit to be measured. Do not impress voltages across the “+”
and “-” terminals when set to the mAcd ranges. Doing so may
result in electric shock, instrument damage and/or damage to
the equipment under test.
3) Select the mAdc range that is higher than the maximum current
to be measured. If the maximum current is unknown, do not
attempt to take a measurement.
4) Remove power from the circuit to be tested and discharge any
capacitors and inductors.
5) Connect the test leads into the circuit so that the meter is in
series with the current where current is to be measured. The current should enter through the red lead and leave through the black
l
ead in order for the meter to indicate in an upscale direction.
6) Turn on power to the circuit under test. Read the current on the
V
-ma Scale and use the full-scale numbers, which correspond to
the range select. The 50 full scale numbers must be divided by
100 when using the 0.5 mAdc range.
7) Turn off the power to the circuit under test. Discharge all capacitors and inductors. Remove the test leads from the circuit under
test.
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. Impressing a voltage across the instrument
while set to any resistance range may result in electric shock,
instrument damage and/or damage to the equipment under test.
Be certain equipment is completely de-energized.
3) Set the selector switch to: X1K” position. Hold the test lead tips
together and adjust for a “0” OHM reading using the “OHM Zero
Adjust” knob. If a zero reading cannot be obtained a weak battery
is the most probable cause. See sec. 6-1.
4) Connect the instrument to the two points between which the
resistance is to be measured. Read the resistance on the uppermost “
Ω” scale. Multiply the reading by 1K (1000).
5) When reading resistors in circuit there may exist more than one
conductive path and the reading taken is a combination of circuit
p
aths. When trying to read one resistor in circuit it is advisable to
remove that resistor before measurement to avoid reading multiple conductive paths.
6
) MAINTENANCE
6-1) Battery Replacement
1) Disconnect test leads from any circuit and then disconnect test
leads from the instrument.
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.
5) Replace the battery with a new 1.5 Vdc, AA size battery, AWS
part B1. When installing the battery make sure the polarity matches that indicated in the battery compartment.
6) Replace the back cover by sliding the end with the small tab in
first. Then replace the Phillips head screw and tighten to a snug
fit. Do not over 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,
0.25 Amp, 250V, 5mm x 20mm, AWS Part #F-16 0r approved equal.
CAUTION
Do not short fuse out of the circuit to eliminate the fuse. These
actions negate the safety purpose of the fuse, can cause extensive damage to the instrument and/or injury to the user.
6-3) Cleaning
The exterior of the instrument can be cleaned with a soft dry cloth
to remove any oil, grease or grime. Never use any liquid solvents or
detergents. Do not polish the instrument. If the instrument gets wet
for any reason, dry the inside and outside of the instrument using
low pressure air, less than 25 PSI.
7
) RETURN FOR REPAIR
Before returning your SP-5A Analog Multimeter for repair be certain
that the failure to operate is not cause by a:
1) Weak battery.
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 Instrument, Inc.
Attn: Customer Service Dept.
245 Marcus Boulevard
Hauppauge, N.Y 11788
State in writing what is wrong with the instrument. If the warranty period is still in effect you must include proof of purchase and state “IN
WARRANTY”. Include your name, address and phone number. Repair
estimates will be furnished if requested for out of warranty instruments.
MADE IN CHINA
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