Harbor Freight Tools 63759 Assembly instructions

Visit our website at: http://www.harborfreight.com
Email our technical support at: [email protected]
63759
7 FUNCTION
DIGITAL MULTIMETER
Owner’s Manual & Safety Instructions
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 number).
Keep this manual and the receipt in a safe and dry place for future reference. 23d
When unpacking, make sure that the product is intact
and undamaged. If any parts are missing or broken,
please call 1-888-866-5797 as soon as possible.
Copyright©2020 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.
Read this material before using this product.
Failure to do so can result in serious injury.
SAVE THIS MANUAL.

Page 2 For technical questions, please call 1-888-866-5797. Item 63759
SAFETY OPERATION MAINTENANCESETUP
Table of Contents
Safety ......................................................2
Specifications ..........................................5
Setup .......................................................6
Operation.................................................7
Maintenance........................................... 11
Warranty .................................................12
WARNING SYMBOLS AND DEFINITIONS
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.
Indicates a hazardous situation which, if not avoided,
will result in death or serious injury.
Indicates a hazardous situation which, if not avoided,
could result in death or serious injury.
Indicates a hazardous situation which, if not avoided,
could result in minor or moderate injury.
Addresses practices not related to personal injury.
IMPORTANT SAFETY INFORMATION
Safety Warnings and Precautions
Read all safety warnings and all instructions.
Failure to follow the warnings and instructions may result
in electric shock, fire and/or serious injury.
Save all warnings and instructions for future reference.
1. Electrical shock can cause death
or injury! NEVER TOUCH exposed
conductors of electricity.
2. Inspect the Multimeter before
use. In addition to a general
inspection, look specifically for:
a. Pay special attention to the
insulation protecting the connectors.
b. Check the leads for exposed metal,
damaged insulation, and continuity.
c. Replace damaged test lead
immediately, before use.
3. Do not use the Multimeter if:
a. Either of the test leads are
damaged in any way.
b. Test leads are dirty or
have residue on them.
c. The battery is low.
d. Near any explosive
gasses or fumes.
e. Any abnormal operation is
detected.
(If in doubt about the
condition of the Meter, have
it serviced before use).

Page 3For technical questions, please call 1-888-866-5797.Item 63759
SAFETYOPERATIONMAINTENANCE SETUP
4. Power this Meter using only
the battery(ies) referenced in
the Specifications Chart.
5. Use caution when working near
voltages above 30 VAC rms,
42 VAC peak, or 60 VDC. Voltages this
high present a risk of electric shock.
6. Disconnect the circuit’s power
before connecting the Meter in
series, when measuring current.
7. Connect the common (COM) test
lead first and disconnect it last.
8. Hold the probes with fingers
behind guards.
9. Avoid electrical shock. Use 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.
10. Observe work area conditions. Do
not test voltages in damp or wet
locations. Don’t expose to rain.
Keep work area clean and well lit.
11. Keep children away. Children must
never be allowed in the work area.
12. Stay alert. Watch what you are doing,
use common sense. Do not operate
any meter when you are tired.
13. Do not operate meter if under the
influence of alcohol or drugs. Read
warning labels on prescriptions
to determine if your judgment or
reflexes are impaired while taking
drugs. If there is any doubt,
do not operate the meter.
14. People with pacemakers should
consult their physician(s) before
use. Electromagnetic fields in close
proximity to heart pacemaker could
cause pacemaker interference
or pacemaker failure.
15. Do not test voltage on circuits higher
than 250 volts AC or 20 volts DC.
16. Do not test current on
circuits higher than 5A.
17. Dress properly. Protective,
electrically nonconductive
clothes and nonskid footwear are
recommended when working.
18. Wear ANSI-approved safety
goggles during use.
19. Only use accessories intended
for use with this meter.
20. Avoid damaging meter. Use only
as specified in this manual.
21. Prior to testing, resistance, diodes,
or continuity; disconnect all power
to the circuit and discharge all
high-voltage capacitors.
22. Performance of this meter may vary
depending on battery condition.
23. Use the proper settings, terminals,
techniques, and range for the
tests performed. Start with the
range stated in the instructions.
24. Do not apply voltage to the Test
Leads when the Multimeter is in
the Ohms testing setting. Damage
can occur to the multimeter.
25. Do not switch between testing
modes with the multimeter
connected to a circuit.
26. Do not use the meter at a setting
marked as blank on the scale.
27. Have the multimeter calibrated by
a qualified technician every year
to maintain accurate results.
28. The warnings, cautions, and
instructions discussed in this
instruction manual cannot cover all
possible conditions 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.

Page 4 For technical questions, please call 1-888-866-5797. Item 63759
SAFETY OPERATION MAINTENANCESETUP
29. Store idle equipment. When not
in use, meters must be stored in a
dry location to decrease exposure
to moisture. Lock up meters and
keep out of reach of children.
SAVE THESE INSTRUCTIONS.

Page 5For technical questions, please call 1-888-866-5797.Item 63759
SAFETYOPERATIONMAINTENANCE SETUP
Specifications
DC Voltage Ranges: 200mV / 2000mV / 20V / 200V / 250V
DC Voltage Accuracy (@ 200mV) 0.5% ± 1D;
(@ 2000mV - 250 V) 1 % ± 2D
AC Voltage Ranges: 200 / 250V
Frequency Range: 45 - 450Hz
AC Voltage Accuracy (@ 200V) 1.2 % ± 10D;
(@ 250V) 1.2 % ± 10D
DC Current Ranges:200uA / 2000uA / 20mA / 200mA / 5A
DC Current Accuracy (@ 0mA - 200mA) 1.2 % ± 2D;
(@ 5A) 3% ± 2D
Resistance Ranges: 200Ω / 2KΩ / 20KΩ / 200KΩ / 2000KΩ
Overload Protection Fast-Acting 500mA and 5A Fuses
Battery One 9V (included)

Page 6 For technical questions, please call 1-888-866-5797. Item 63759
SAFETY OPERATION MAINTENANCESETUP
Setup - Before Use:
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.
Functions
5A max
BB
CC
5A
7 FUNCTION7 FUNCTION
AC Volt
Selection Area
Battery Test
DC Current
5ADC
Jack
Transistor
VΩmA
Jack
COM Jack
On/Off
Switch
Diode
Resistance
DC Voltage
Transistor
Testing Socket
Range Selector
Switch

Page 7For technical questions, please call 1-888-866-5797.Item 63759
SAFETYOPERATIONMAINTENANCE SETUP
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.
Electrical shock can cause death or injury! NEVER TOUCH
exposed conductors of electricity.
Measurement Operation
AC Voltage Measurement
Measure AC conductors carrying up to 250 VAC, 45-450 Hz.
WARNING! Use caution when working
near voltages above 30 VAC rms
or 42 VAC peak. Voltages this high
present a risk of electric shock.
WARNING! To prevent damage
to the Meter or personal serious
injury, do not measure voltages
higher than 250 VAC rms.
1. Turn the Range Selector Switch to
250 ACV setting. Start with the highest
range if the voltage is unknown.
2. Plug the black lead into the COM
Jack. Plug the red lead into the
VΩmA Jack. Turn Multimeter ON.
3. Carefully touch the exposed
conductors with the tips of the probes
to measure the voltage (not amperes).
4. Read measurement. If the voltage
is less than 200 volts, set the Range
Selector Switch to the lower range.
5. When testing is complete, turn
Multimeter OFF, remove Test
Leads and store with Multimeter.
DC Voltage Measurement
Measure DC conductors carrying up to 250 VDC.
WARNING! Use caution when working
near voltages above 60 VDC. Voltages
this high present a risk of electric shock.
WARNING! To prevent damage to the
Meter or personal serious injury, do not
measure voltages higher than 250 VDC.
1. Turn the Range Selector
Switch to 250 DCV setting.
2. Plug the black lead into the COM
Jack. Plug the red lead into the
VΩmA Jack. Turn Multimeter ON.
3. Carefully touch the exposed
conductors with the tips of the probes
to measure the voltage (not amperes).
4. Read measurement. If the voltage
is less than the voltage of one of the
lower ranges, set the Range Selector
Switch to the range that is closest
but still higher than the reading.
5. When testing is complete, turn
Multimeter OFF, remove Test
Leads and store with Multimeter.

Page 8 For technical questions, please call 1-888-866-5797. Item 63759
SAFETY OPERATION MAINTENANCESETUP
DC Current Measurement
Measure current in DC circuits carrying up to 5 amperes.
Note: Amperage is always tested
in series with circuit under test.
Note: When using manual range
mode, always start with the highest
range if the amperage is unknown.
WARNING! To prevent damage
to the meter, be sure to use
the correct input jacks.
1. Turn the Range Selector Switch to
the 5A position. Start with the highest
range if the amperage is unknown.
2. Always start with the highest range
if the amperage is unknown.
3. Turn off power to the circuit and
allow capacitors to discharge.
4. Break the circuit and connect the
Test Leads in series with the circuit
being measured. Connect the black
lead on the lower voltage side.
• Plug black test lead
into COM Jack.
• Plug red test lead into 5ADC Jack.
5. Power on the circuit and read
measurement. If the reading is less
than 0.2 amps, switch the red lead to
the VΩmA Jack and set the Range
Selector Switch to the 200mA setting.
6. Repeat measurement. Set the Range
Selector Switch to the range that is
closest but still higher than the reading.
Note: Measure for a maximum 30
seconds and allow 15 minutes to
pass between measurements.
7. When testing is complete, turn
Multimeter OFF, remove Test
Leads and store with Multimeter.
Resistance Measurement
Measure circuit resistance up to 2000K Ohms.
WARNING! To prevent electric shock, turn
off all power and fully discharge capacitors
in the circuit under test before measuring.
Notice: When measuring Ohms,
start with the lowest range if the
resistance is unknown.
1. Turn the Range Selector Switch
to the 200Ω position.
2. Plug the black lead into the COM
Jack. Plug the red lead into the
VΩmA Jack. Turn Multimeter ON.
Short the Test Leads together. The
meter should read “0” Ohms.
3. Carefully touch the exposed
conductors with the tips of the Probes.
4. Read measurement. If the reading
is “1”, set the Range Selector Switch
to the next higher Ohm (Ω) position.
5. When testing is complete, turn
Multimeter OFF, remove Test
Leads and store with Multimeter.

Page 9For technical questions, please call 1-888-866-5797.Item 63759
SAFETYOPERATIONMAINTENANCE SETUP
Transistor (hFE) Measurement
Test transistors to ensure proper function.
1. Turn the Range Selector Switch to the
hFE position. Turn Multimeter ON.
2. Insert transistor pins into the
appropriate holes of the hFE
testing socket (NPN or PNP)
according to the EBC (Emitter,
Base, Collector) sequence.
3. The meter will show the
approximate hFE value.
4. When testing is complete, turn
Multimeter OFF, remove and store
Transistor and Multimeter.
Diode Measurement
Test the voltage drop in diodes.
WARNING! To prevent electric shock, turn
off all power and fully discharge capacitors
in the circuit under test before measuring.
1. Turn the Range Selector Switch
to the Diode ( ) position.
2. Plug the black lead into the COM
Jack. Plug the red lead into the
VΩmA Jack. Turn Multimeter ON.
3. Connect red probe to the anode of the
diode and the black to the cathode.
4. The approximate forward voltage
drop of the diode will be displayed
in mV. If the connection is
reversed, only “1” will be shown.
5. When testing is complete, turn
Multimeter OFF, remove Test
Leads and store with Multimeter.

Page 10 For technical questions, please call 1-888-866-5797. Item 63759
SAFETY OPERATION MAINTENANCESETUP
Battery Test
Test the amount of charge left in batteries.
NOTE: This setting is for testing the
charge of small 9V or 1.5V batteries
only. Never use this setting to test
automotive or lead-acid batteries. The
high current could cause damage
to the meter and/or cause severe
personal injury. Use the appropriate
DC Voltage setting to test the open circuit
voltage of such batteries instead.
1. Turn the Range Selector Switch
to the Battery ( ) position.
2. Plug the black lead into the COM
Jack. Plug the red lead into the VΩmA
Jack. Switch the Multimeter ON.
3. Touch the red probe to the positive
terminal of the battery and the
black to the negative terminal.
4. The battery amperage through an
internal 360 ohm resistor will be
displayed to a resolution of .1mA.
5. Normal amperage: For a standard
9V (6LR61) battery the amperage
will be approximately 25 mA (9V
divided by 360 = 0.025). Weaker
batteries will have a lower current.
6. Normal amperage: For a 1.5 V
“AA” (LR6) battery the amperage
will be approximately 4.2 mA (1.5V
divided by 360 = 0.0042). Weaker
batteries will have a lower current.
7. When testing is complete, turn
Multimeter OFF, remove Test
Leads and store with Multimeter.

Page 11For technical questions, please call 1-888-866-5797.Item 63759
SAFETYOPERATIONMAINTENANCE SETUP
Maintenance and Servicing
Procedures not specifically explained in this manual
must be performed only by a qualified technician.
Cleaning, Maintenance, and Lubrication
1. Wipe unit with a dry, lint-free cloth.
Do not use solvents or abrasives.
2. Remove battery if not in
use for long periods.
3. Store unit in a dry location.
4. Other than the battery, there
are no replaceable parts on this
unit. Repairs should be done
by a qualified technician.
Battery Replacement
If the sign appears on the Display,
the battery should be replaced.
1. Remove the Test Leads
from the multimeter.
2. Turn the unit over.
3. Remove screws.
4. Remove back cover carefully.
5. Remove and replace with
the same (9V battery).
6. Replace cover and replace screws.
Record Product’s Serial Number Here:
Note: If product has no serial number, record month and year of purchase instead.
Note: Replacement parts may be available for this item.
Visit harborfreight.com/parts for a list of in stock parts. Reference UPC 193175346919.

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 consequential 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 verifies 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 specific legal rights and you may also
have other rights which vary from state to state.
26677 Agoura Road • Calabasas, CA 91302 • 1-888-866-5797