SEVEN FUNCTION DIGITAL
MULTIMETER
98025
SET UP AND OPERATING INSTRUCTIONS
Distributed exclusively by Harbor Freight Tools
®
.
3491 Mission Oaks Blvd., Camarillo, CA 93011
Visit our website at: http://www.harborfreight.com
Read this material before using this product.
Failure to do so can result in serious injury.
SAVE THIS MANUAL.
Copyright
©
2008 by Harbor Freight Tools
®
. All rights reserved. No portion of this manual or any
artwork contained herein may be reproduced in any shape or form without the express written
consent of Harbor Freight Tools. Diagrams within this manual may not be drawn proportionally.
Due to continuing improvements, actual product may differ slightly from the product described
herein. Tools required for assembly and service may not be included.
For technical questions or replacement parts, please call 1-800-444-3353.
SKU 98025 For technical questions, please call 1-800-444-3353. Page 2
SAVE THIS MANUAL
Keep this manual for the safety
warnings and precautions, assembly,
operating, inspection, maintenance and
cleaning procedures. Write the product’s
serial number in the back of the manual
near the assembly diagram (or month and
year of purchase if product has no num-
ber). Keep this manual and the receipt in
a safe and dry place for future reference.
IMPORTANT SAFETY
INFORMATION
In this manual, on the labeling,
and all other information
provided with this product:
This is the safety alert
symbol. It is used to alert
you to potential personal
injury hazards. Obey all
safety messages that
follow this symbol to avoid
possible injury or death.
DANGER indicates
a hazardous
situation which, if not
avoided, will result in death or
serious injury.
WARNING indicates
a hazardous
situation which, if not
avoided, could result in death
or serious injury.
CAUTION, used
with the safety alert
symbol, indicates a
hazardous situation which, if
not avoided, could result in
minor or moderate injury.
NOTICE is used to
address practices
not related to personal injury.
CAUTION, without
the safety alert
symbol, is used to address
practices not related to
personal injury.
General Safety Rules
WARNING Read all safety
warnings and instructions.
Failure to follow the warnings and
instructions may result in electric
shock, re and/or serious injury.
Save all warnings and
instructions for future
reference.
Electrical shock can cause death 1.
or injury! NEVER TOUCH exposed
conductors of electricity.
Inspect the Multimeter before use. In 2.
addition to a general inspection, look
specically for:
Pay special attention to the insula-a.
tion protecting the connectors.
Check the leads for exposed metal, b.
damaged insulation, and continuity.
Replace damaged test lead imme-c.
diately, before use.
Do not use the multimeter if:3.
The test lead is damaged in any a.
way.
The battery is low.b.
Near any explosive gasses or c.
fumes.
Any abnormal operation is de-d.
tected.
(If in doubt about the condition of
the meter, have it serviced.)
The battery cover is open.e.
SKU 98025 For technical questions, please call 1-800-444-3353. Page 3
This meter should be powered only by 4.
a single, correctly installed 9V battery.
Use caution when working near volt-5.
ages above 30 VAC rms, 42 VAC
peak, or 60 VDC. Voltages this high
present a risk of electric shock.
Disconnect the circuit’s power before 6.
connecting the meter in series, when
measuring current.
Connect the common (COM) test lead 7.
rst and disconnect it last.
Hold the probes with ngers behind 8.
guards.
Avoid electrical shock. Use 9.
extreme caution when working near
uninsulated conductors or bus bars.
Prevent body contact with grounded
surfaces such as pipes, radiators,
ranges, and cabinet enclosures when
testing voltages.
Observe work area conditions. Do not 10.
test voltages in damp or wet locations.
Don’t expose to rain. Keep work area
clean and well lit.
Keep children away. Children must 11.
never be allowed in the work area.
Stay alert. Watch what you are doing, 12.
use common sense. Do not operate
any meter when you are tired.
Do not operate meter if under the 13.
inuence of alcohol or drugs. Read
warning labels on prescriptions to
determine if your judgment or reexes
are impaired while taking drugs. If
there is any doubt, do not operate the
meter.
Due to the danger inherent in such 14.
work, we strongly recommend that
only a licensed electrician work on
high-voltage or other potentially dan-
gerous circuits.
This product contains or produces 15.
chemicals, including lead, known to
the State of California to cause cancer
and birth defects (or other reproduc-
tive harm).
(California Health & Safety Code §
25249.5, et seq.)
Do not test voltage on circuits higher 16.
than 750 volts AC or 1000 volts DC.
This type of testing should only be
done by a qualied electrician.
Do not test current on circuits higher 17.
than 200 mA.
Store idle equipment. When not in 18.
use, meters must be stored in a dry
location to decrease exposure to
moisture. Lock up meters and keep
out of reach of children.
Dress properly. Protective, electrically 19.
nonconductive clothes and nonskid
footwear are recommended when
working.
Wear ANSI-approved impact safety 20.
goggles.
Only use accessories intended for 21.
use with this meter.
The warnings, cautions, and instruc-22.
tions discussed in this instruction
manual cannot cover all possible con-
ditions and situations that may occur.
It must be understood by the operator
that common sense and caution are
factors which cannot be built into this
product, but must be supplied by the
operator.
Avoid damaging meter. Use only as 23.
specied in this manual.
Prior to testing, resistance, diodes, or 24.
continuity; disconnect all power to the
circuit and discharge all high-voltage
capacitors.
SKU 98025 For technical questions, please call 1-800-444-3353. Page 4
Performance of this meter may vary 25.
depending on battery condition.
Use the proper settings, terminals, 26.
techniques, and range for the tests
performed. Always start with the
range stated in the instructions.
Do not apply voltage to the Test 27.
Leads when the Multimeter is in the
Ohms testing setting. Damage can
occur to the multimeter.
Do not switch between testing modes 28.
with the multimeter connected to a
circuit.
Never attempt to use the meter at a 29.
setting combination marked as blank
on the scale.
Prior to testing capacitors, resistance, 30.
diodes, or continuity; disconnect all
power to the circuit and discharge all
high-voltage capacitors.
Check fuse before testing current.31.
Use the proper settings, terminals, 32.
techniques, and range for the tests
performed. Always start with the
range stated in the instructions.
Have the Multimeter calibrated by 33.
a qualied technician every year. A
multimeter that is not calibrated yearly
will not yield accurate results.
SAVE THESE
INSTRUCTIONS.
SPECIFICATIONS
Power
Requirements
9V Battery
Frequency 45 to 450 Hz
DC Amps
Ranges: 200mA/2000mA/
20mA/ 10A
Accuracy
(@0mA-200mA)
1.2%±2D; (@10A)
3%±2D
DC Voltage
Ranges:
200mV/2000mV
20/200/1000V
Accuracy
(@200mV) 0.5%±1D
(@2000mV-200V) 1%±2D
(@1000V) 1%±2D
AC Voltage Ranges: 200/750V
Accuracy
(45-450 Hz)
1.2%±10D
Resistance
Ranges:
200/2000/20K/
200K/2000K Ohm
UNPACKING
When unpacking, check to make
sure that the item is intact and undam-
aged. If any parts are missing or broken,
please call Harbor Freight Tools at the
number shown on the cover of this manual
as soon as possible.
OPERATING INSTRUCTIONS
Read the ENTIRE IMPORTANT
SAFETY INFORMATION
section at the beginning of this
manual including all text under
subheadings therein before set
up or use of this product.
TO PREVENT
SERIOUS INJURY
FROM ACCIDENTAL
OPERATION:
ELECTRICAL SHOCK CAN
CAUSE DEATH OR INJURY.
AVOID TOUCHING EXPOSED
CONDUCTORS OF
ELECTRICITY.
Do not test voltage on AC circuits
higher than 750 volts.
Do not test voltage on DC circuits
higher than 1000 volts.
SKU 98025 For technical questions, please call 1-800-444-3353. Page 5
Do not test current on circuits higher
than 10 amps.
Disconnect Test Leads. Use a 1.
screwdriver to remove both screws on
the rear of the unit. Observe polarity,
and attach a 9V battery to the posts.
Replace and secure the cover.
Do not apply voltage to the Test 2.
Leads when they are connected to
the COM (Bottom) and VWmA (Cen-
ter) Jacks and the Multimeter is in an
Ohms testing setting. Damage can
occur to the multimeter or the fuse
may blow.
Do not switch between testing modes 3.
with the multimeter connected to a
circuit.
AC Voltage Measurements
Measure AC conductors carrying up 1.
to 750 VAC, 45-450 Hz.
Turn the Range Selector Switch to 2.
750 ACV setting. Always start with
the highest range if the voltage is
unknown.
Plug the red lead into the VWmA 3.
(Center) Jack. Plug the black lead into
the COM (Bottom) Jack. Switch the
Multimeter ON.
Carefully touch the exposed conduc-4.
tors with the tips of the probes to
measure the voltage (not amperes).
Read measurement. 5.
If the voltage is less than 200 volts, 6.
set the Range Selector Switch to the
lower range.
When testing is complete, remove 7.
Test Leads and store with multimeter.
DC Voltage Measurements
Measure DC conductors carrying up 1.
to 1000 VDC.
Turn the Range Selector Switch to 2.
1000 DCV setting.
Follow the directions above under 3.
“AC Voltage Measurements”, only use
the DC settings instead.
DC Current Measurements
Measure DC conductors carrying up 1.
to 10 amperes.
Turn the Range Selector Switch to the 2.
10A position.
Always start with the highest range if 3.
the amperage is unknown.
Plug the red lead into the 10A (Top) 4.
Jack. Plug the black lead into the
DC Volt
Selection
Area
AC Volt Selection Area
Battery Test Selection Area
DC Amp
Selection
Area
10 Amp
Selection
Area/Jack
Transistor
Selection
Area
Volt/Ohm/
mA Jack
COM Jack
Diode Selection Area
ON/OFF Switch
Transistor
/hFE Jack
Ohm
Selection
Area
SKU 98025 For technical questions, please call 1-800-444-3353. Page 6
COM (Bottom) Jack. Switch the Multi-
meter ON.
Carefully touch the exposed conduc-5.
tors with the tips of the probes to
measure the amperage.
Note: Amperage is always tested in series
with the circuit under test.
Read measurement. 6.
If the reading is less than .2 AMPs, 7.
switch the red lead to the VWmA
(Center) Jack and set the Range Se-
lector Switch to the 200 mA setting.
When testing is complete, remove 8.
Test Leads and store with multimeter.
Resistance Measurements
Measure circuit resistance up to 1.
2000K Ohms.
Warning: Never measure resistance 2.
on a circuit with voltage running
through it.
Turn the Range Selector Switch to the 3.
200 W position.
Plug the red Test Lead into the VWmA 4.
(Center) Jack. Plug the black Test
Lead into the Com (Bottom) Jack.
Switch the Multimeter ON.
Short the Test Leads together. The 5.
meter should read “0” Ohms.
Touch the exposed conductors with 6.
the tips of the Test Leads.
Read measurement.7.
If the reading is “1”, set the Range 8.
Selector Switch to the next higher
Ohm (W) position.
Transistor (hFE) Measurements
Test transistors to ensure proper 1.
function.
Turn the Range Selector Switch to the 2.
hFE position.
Switch the Multimeter ON.3.
Insert the transistor pins into the 4.
appropriate hFE jack (NPN or PNP)
according to the EBC (Emitter, Base,
Collector) sequence.
The meter will show the approximate 5.
hFE value.
Diode Measurement
Test the voltage drop in diodes.1.
Turn the Range Selector Switch to the 2.
Diode ( ) position.
Plug the red Test Lead into the VWmA 3.
(Center) Jack. Plug the black Test
Lead into the Com (Bottom) Jack.
Switch the Multimeter ON.
Connect the red probe to the anode 4.
of the diode and the black to the
cathode.
The approximate forward voltage drop 5.
of the diode will be displayed in mV.
If the connection is reversed only “1”
will be shown.
Battery Charge Measurement
Test the amount of charge left in bat-1.
teries.
NOTE: This setting is for testing the
charge of small 9V or 1.5V batteries
only. Never use this setting to test au-
tomotive or lead-acid batteries. The
high current could cause damage
to the meter and/or cause severe
personal injury. Use the appropri-
ate DC Voltage setting to test the
open circuit voltage of such batteries
instead.
Turn the Range Selector Switch to the 2.
Battery ( ) position.
SKU 98025 For technical questions, please call 1-800-444-3353. Page 7
Plug the red Test Lead into the VWmA 3.
(Center) Jack. Plug the black Test
Lead into the Com (Bottom) Jack.
Switch the Multimeter ON.
Connect the red probe to the positive 4.
terminal of the battery and the black
to the negative terminal.
The battery amperage under a load of 5.
370 mW will be displayed to a resolu-
tion of .1mA.
Normal amperage: 6.
For a standard 9V (6LR61) battery =
25 mA
For a 1.5 V “AA” (LR6) battery = 4 mA7.
To prevent accidents, turn off the 8.
tool and disconnect its power supply
after use. Clean, then store the tool
indoors out of children’s reach.User-
Maintenance Instructions
Proceduresnotspecically
explained in this manual must
beperformedonlybyaqualied
technician.
TO PREVENT
SERIOUS INJURY
FROM ACCIDENTAL
OPERATION:
Turn the Power Switch of the
tool to its “OFF” position and
remove the test leads before
performing any inspection,
maintenance, or cleaning
procedures.
Cleaning, Maintenance, and
Lubrication
BEFORE EACH USE,1. inspect the
general condition of the tool. Check
for loose screws, misalignment or
binding of moving parts, cracked or
broken parts, damaged electrical wir-
ing, and any other condition that may
affect its safe operation.
AFTER USE,2. clean external surfaces
of the tool with clean cloth.
Replace battery as necessary. 3.
No replaceable parts. 4.
SKU 98025 For technical questions, please call 1-800-444-3353. Page 8
LIMITED 90 DAY WARRANTY
Harbor Freight Tools Co. makes every effort to assure that its products meet
high quality and durability standards, and warrants to the original purchaser that this
product is free from defects in materials and workmanship for the period of 90 days
from the date of purchase. This warranty does not apply to damage due directly or
indirectly, to misuse, abuse, negligence or accidents, repairs or alterations outside
our facilities, criminal activity, improper installation, normal wear and tear, or to lack of
maintenance. We shall in no event be liable for death, injuries to persons or property,
or for incidental, contingent, special or consequential damages arising from the use of
our product. Some states do not allow the exclusion or limitation of incidental or con-
sequential damages, so the above limitation of exclusion may not apply to you. THIS
WARRANTY IS EXPRESSLY IN LIEU OF ALL OTHER WARRANTIES, EXPRESS OR
IMPLIED, INCLUDING THE WARRANTIES OF MERCHANTABILITY AND FITNESS.
To take advantage of this warranty, the product or part must be returned to us
with transportation charges prepaid. Proof of purchase date and an explanation of the
complaint must accompany the merchandise. If our inspection veries the defect, we
will either repair or replace the product at our election or we may elect to refund the
purchase price if we cannot readily and quickly provide you with a replacement. We will
return repaired products at our expense, but if we determine there is no defect, or that
the defect resulted from causes not within the scope of our warranty, then you must
bear the cost of returning the product.
This warranty gives you specic legal rights and you may also have other rights
which vary from state to state.
3491 Mission Oaks Blvd. • PO Box 6009 • Camarillo, CA 93011 • (800) 444-3353
