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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� 18f
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
©
2017 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�
To ols required for assembly and se rv ic e m ay n ot b e i nc lu de d �
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 64015
SaFety OperatiOn MaintenanceSetup
table of contents
Safety ������������������������������������������2
Specifications ������������������������������5
Setup �������������������������������������������6
Operation ������������������������������������� 9
Maintenance �������������������������������15
Warranty �������������������������������������16
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�
Page 3For technical questions, please call 1-888-866-5797.Item 64015
SaFetyOperatiOnMaintenance Setup
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� test cable voltages with care.
Only use one hand when securing
the clamp around cable�
3� Inspect the Meter before use� In
addition to a general inspection:
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�
4� Do not use the Meter 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�)
f� The battery cover is open�
5� Power this Meter using only
the battery(ies) referenced in
the Specifications Chart�
6� 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�
7� Disconnect the circuit’s power
before connecting the Meter in
series, when measuring current�
8� Connect the common (COM) test
lead first and disconnect it last�
9� Hold the probes with fingers
behind guards�
10� 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�
11� 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�
12� Keep children away� Children must
never be allowed in the work area�
13� Stay alert� Watch what you are doing,
use common sense� Do not operate
any Meter when you are tired�
14� 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�
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SaFety OperatiOn MaintenanceSetup
15� 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�
16� Do not test voltage on circuits
higher than 600 volts�
17� Do not test current on circuits
higher than 600A�
18� Dress properly� Protective,
electrically nonconductive
clothes and nonskid footwear are
recommended when working�
19� Wear ANSI-approved safety
goggles during use�
20� Only use accessories intended
for use with this Meter�
21� Avoid damaging Meter� Use only
as specified in this manual�
22� Prior to testing resistance, diodes,
or continuity; disconnect all power
to the circuit and discharge all
high-voltage capacitors�
23� Performance of this Meter may vary
depending on battery condition�
24� Use the proper settings, terminals,
techniques, and range for the
tests performed� Start with the
range stated in the instructions�
25� Do not apply voltage to the Test
Leads when the Meter is in the
Ohms testing setting� Damage
can occur to the Meter�
26� Do not switch between testing modes
with the Meter connected to a circuit�
27� Do not use the Meter at a setting
marked as blank on the scale�
28� Have the Meter calibrated by a
qualified technician every year
to maintain accurate results�
29� Do not disassemble Meter; take
it to a qualified technician when
service or repair is required�
Incorrect reassembly may result
in a risk of electric shock or fire�
30� 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�
SaVe tHeSe inStructiOnS.
Page 5For technical questions, please call 1-888-866-5797.Item 64015
SaFetyOperatiOnMaintenance Setup
Specifications
DC Voltage Ranges: 660mV / 6�6V / 66V / 600V
DC Voltage Accuracy (@660mV to 66V) ± 0�8%of rdg + 3D
(@600V) ± 1 �0% of rdg + 5D
DC Current Ranges: 66A/600A
DC Current Accuracy ± 3�0% of rdg + 10D
AC Voltage Ranges: 660mV / 6�6V / 66V/ 600V
Frequency Range: 40-400Hz
AC Voltage Accuracy (@660mV) ± 1�5% of rdg + 10D
(@6�6-66V) ± 1�2% of rdg + 5D
(@600V) ± 1�5% of rdg + 10D
AC Current Ranges: 66A / 600A
Frequency Range: 40-400Hz
AC Current Accuracy ± 3�0% of rdg + 10D
Inrush Current Ranges: 66A/600A
Frequency Range: 40-400Hz
Inrush Current Accuracy (@66A) Reference only;
(@600A) ± 10�0% of rdg + 60D
Resistance Ranges: 660Ω /6.6kΩ / 66kΩ / 660kΩ / 6.6MΩ / 66MΩ
Resistance Accuracy (@660Ω-6.6MΩ) ± 1.2% of rdg + 2D
(@66MΩ) ± 2.0% of rdg + 5D
Continuity Meter beeps at < 50Ω ± 20Ω
Diode Forward DC Current: ~1mA
Reverse DC Voltage: ~3�2V
Capacitance Ranges: 6.6μF / 66μF / 660μF / 6.6mF / 66mF
Capacitance Accuracy (@6.6μf) ± 4.0% of rdg + 50D
(@66μf-66mF) ± 4.0% of rdg + 3D
Frequency Current Mode Range: 10Hz - 1kHz
Voltage Mode Range: 10Hz - 10kHz
Frequency Accuracy Current Mode: (@660Hz-1kHz) ± 1�5% of rdg + 5D
(@ > 1kHz) Reference only
Voltage Mode: (@660Hz-10kHz) ± 1�5% of rdg + 5D
(@ > 10kHz) Reference only
Duty Cycle 10%-95%
Duty Cycle Accuracy ± 3�0%
Sampling Rate ~0�4 seconds per sample
Operating Temperature Range: 32°F - 104°F (0°C - 40°C)
Display Liquid Crystal Display (LCD)
Battery 3x AAA batteries (Included)
Page 6 For technical questions, please call 1-888-866-5797. Item 64015
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
1
2
3
4
5
6
7
8
9
15
14
13
12
11
10
16
20
17
18
19
Page 7For technical questions, please call 1-888-866-5797.Item 64015
SaFetyOperatiOnMaintenance Setup
1 current clamp
2 Worklight
3 panel
4 trigger
5 Select Button (SeL)
6 MaX/Min Button
7 range Button (ran)
8 Display
9 cOM Jack
10 input Jack
11 Frequency/Duty cycle Button (Hz/%)
12 reading Hold/Backlight Button (B.L HOLD)
13 rotary Selector
14 power OFF
15 positive (+) Symbol
16 negative (-) Symbol
17 rear case
18 Fixing Screw
19 Battery cover
20 protective Barrier
Page 8 For technical questions, please call 1-888-866-5797. Item 64015
SaFety OperatiOn MaintenanceSetup
Display
Hz
autO
Manu
MaX Min ZerO
μmVa
μmF
MkΩ
inruSH
trMS
Symbol Description
ac
Alternating current
Dc
Direct current
Diode test
Continuity
autO Auto range mode
Manu Manual range mode
Min The minimum value is being measured�
MaX The maximum value is being measured�
ZerO DCA zero
Auto power off
Battery low
trMS True RMS
Indicates that display data is being held�
inruSH Inrush current is being measured�
% Percent (Duty cycle)
mV, V Millivolts, Volts (Voltage)
a Amperes (Current)
μF mF Microfarads, Millifarads (Capacitance)
Ω kΩ MΩ Ohms, Kiloohms, Megaohms (Resistance)
Hz, kHz Hertz, Kilohertz (Frequency)
Page 9For technical questions, please call 1-888-866-5797.Item 64015
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.
General Operating instructions
Data Hold
The data hold function will keep the current reading on the Display� To activate data hold:
1� Press the B.L HOLD button and
the reading will be held on the
Display� The symbol appears�
2� Press B.L HOLD again
to release the hold�
Manual range
The Meter’s default range is autO� To select manual range, press ran� Each press
of the button increases the range� Hold the ran button to return to auto-range�
note: Manual range cannot be used while measuring frequency�
Frequency and Duty cycle Measurements
1� While working with voltage or
current ranges, press the Hz/%
button one time to measure the
frequency of the voltage or current�
2� Press the Hz/% button twice to
measure the duty cycle of the voltage
or current� The range is set to manual�
3� Press the Hz/% button a third
time to return to normal voltage
or current measurement�
note: Frequency and duty cycle
modes cannot be used while in
minimum or maximum value mode�
Minimum and Maximum Value Measurements
1� Press the Min/MaX button one
time to measure the maximum
value at any range�
2� Press the Min/MaX button
two times to measure the
minimum value at any range�
3� Press the Min/MaX button three
times to display the current
measurement while recording the
maximum and minimum values�
4� Hold the Min/MaX button
for one or more seconds to
return to normal mode�
note: The Meter is automatically set to
manual range mode when measuring
minimum or maximum value�
note: Frequency and duty cycle modes
cannot be used while in minimum
and maximum value mode�
Page 10 For technical questions, please call 1-888-866-5797. Item 64015
SaFety OperatiOn MaintenanceSetup
Backlight and Worklight
1� Press the B.L HOLD button for
two or more seconds to turn on the
LCD backlight for 60 seconds�
2� Press the B.L HOLD button for
two or more seconds again to
turn the LCD backlight off�
3� While in current range modes,
turning the backlight on also
turns the clamp Worklight on�
note: Frequent use of the backlight will
shorten the life of the batteries� Only
use the backlight when necessary�
auto power-Off
If the Meter is not used for approximately 30 minutes, it will automatically
turn itself off to conserve battery power� To turn the Meter back on after
auto-off, press the SeL button� To disable Auto Power-Off, hold the Min/
MaX, ran, or Hz% button while powering the Meter on�
Measurement Operation
note: Remove plugs from
ends of Test Leads (included)
before connecting to Meter�
note: Test Lead probes have removable
covers for overvoltage protection� With
covers in place, Test Leads are rated for
use with CAT IV circuits� Exposed probes
are rated for use with CAT II circuits�
current Measurement
WarninG! To avoid electric shock,
use only one hand to hold Meter
when measuring current�
WarninG! Remove test leads
before taking measurements
with the Current Clamp�
note: Amperage is always tested
in series with circuit under test�
note: To measure 2- and 3-wire power
cords, use an AC Line Splitter (not included)
and follow its instructions�
1� Using one hand, press Trigger to
open Current Clamp� Position Clamp
jaws around conductor to be tested�
2� Center conductor between guides
in Clamp jaws, as shown�
ac/Dc current
Measure AC and DC conductors
carrying up to 600 amperes�
1� Turn Rotary Switch to
(AC Current) or (DC
Current) position�
2� When measuring DC current,
press the SeL button to zero
the reading on the display�
3� When using manual range mode,
always start with the highest range
if the amperage is unknown�
Page 11For technical questions, please call 1-888-866-5797.Item 64015
SaFetyOperatiOnMaintenance Setup
4� Using one hand, press Trigger to open
Clamp jaws and close them around
the single conductor to be tested�
note: When measuring DC current,
ensure that current flows in the direction
indicated by the Positive (+) and Negative
(-) Symbols on the Current Clamp�
5� Read measurement� Switch to
lower ranges, as necessary, to
get the most accurate reading�
6� When testing is complete, turn
Rotary Switch to OFF, and store Meter�
note: If Display shows OL while in
manual range mode, the measurement
has exceeded the selected range� A
higher range should be selected�
inrush current
Measure AC conductors carrying
up to 600 amperes�
1� Turn Rotary Switch to the
position�
2� Press SeL to switch to inruSH
current mode� ---- displays while the
inrush current is being detected�
3� When using manual range mode,
always start with the highest range
if the amperage is unknown�
4� Press the Trigger to open
the Current Clamp and insert
conductor inside the jaws�
5� Read measured inrush current
on the Display� The current is
only measured once and the
reading is held on the Display�
6� When testing is complete, turn
Rotary Switch to OFF, and store Meter�
note: If the Display shows OL while in
manual range mode, the measurement
has exceeded the selected range� A
higher range should be selected�
ac/Dc Voltage Measurement
Measure AC conductors carrying
up to 600 rms VAC, 40-400 Hz�
Measure DC conductors
carrying up to 600 VDC�
WarninG! 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�
1� Plug black test lead into cOM Jack�
Plug red test lead into input Jack�
2� Turn Rotary Switch to the position�
3� Press SeL button to choose
between AC and DC voltage�
4� Carefully touch exposed
conductors with tips of probes�
5� Read measured voltage on the Display�
6� When testing is complete, turn
Rotary Switch to OFF, remove
Test Leads and store with Meter�
note: If voltage is too high,
Display will read OL.
Page 12 For technical questions, please call 1-888-866-5797. Item 64015
SaFety OperatiOn MaintenanceSetup
Frequency/Duty cycle Measurement
note: Frequency and duty cycle modes cannot be used
while in minimum and maximum value mode�
current Mode
Measure frequency up to 1kHz�
WarninG! Remove test leads
before taking measurements
with the Current Clamp�
1� Turn Rotary Switch to
the (AC Current) or
(DC Current) position�
2� Press the Trigger to open
the Current Clamp and insert
conductor inside the jaws�
3� Press Hz% to choose between
frequency and duty cycle modes�
4� Read measured frequency or
duty cycle on the Display�
5� When testing is complete, turn
Rotary Switch to OFF, and store Meter�
Voltage Mode
Measure frequency up to 10kHz�
1� Plug black test lead into cOM Jack�
Plug red test lead into input Jack�
2� Turn Rotary Switch to the position�
3� Connect the Test Leads across
the circuit to be measured�
4� Press Hz% to choose between
frequency and duty cycle modes�
5� Read measured frequency or
duty cycle on the Display�
6� When testing is complete, turn
Rotary Switch to OFF, remove
Test Leads and store with Meter�
note: Frequency test range is 10Hz-
10kHz� If the frequency is lower than
10�0Hz, 00.0 is shown on the Display�
note: If the duty cycle is less than 10%,
uL is displayed� If the duty cycle is
greater than 94�9%, OL is displayed�
note: Input signal test range
is 10Hz-10kHz�
Page 13For technical questions, please call 1-888-866-5797.Item 64015
SaFetyOperatiOnMaintenance Setup
resistance Measurement
Measure circuit resistance up to 66M Ohms�
WarninG! To prevent electric shock, turn
off all power and fully discharge capacitors
on the circuit under test before measuring�
note: When measuring Ohms,
start with the lowest range if the
resistance is unknown�
1� Plug black test lead into cOM Jack�
Plug red test lead into input Jack�
2� Turn Rotary Switch to the
position�
3� Carefully touch exposed
conductors with tips of probes�
4� Read measured resistance
on the Display�
5� When testing is complete, turn
Rotary Switch to OFF, remove
Test Leads and store with Meter�
note: Sometimes the resistor value and
measured resistance differ� This is due
to the Meter’s output test current going
through all possible paths between leads�
note: For resistance measurements
above 1MΩ, allow a few seconds
to get a steady reading�
note: When leads are disconnected
or measurement is out of
range, OL is displayed�
continuity Measurement
Test continuity between two
points of a circuit�
WarninG! To prevent electric shock, turn
off all power and fully discharge capacitors
on the circuit under test before measuring�
1� Plug black test lead into cOM Jack�
Plug red test lead into input Jack�
2� Turn Rotary Switch to the
position�
3� Press SeL until is displayed�
4� Connect the test leads across
the circuit to be measured�
5� Read measured resistance on the
Display� If the measured resistance is
less than 50Ω ± 20Ω, Meter will beep.
6� When testing is complete, turn
Rotary Switch to OFF, remove
Test Leads and store with Meter�
note: If the test leads are open
or the resistance of the circuit is
over 660Ω, OL is displayed�
Page 14 For technical questions, please call 1-888-866-5797. Item 64015
SaFety OperatiOn MaintenanceSetup
Diode Measurement
Test voltage drop in diodes�
WarninG! To prevent electric shock, turn
off all power and fully discharge capacitors
on the circuit under test before measuring�
1� Plug black test lead into cOM Jack�
Plug red test lead into input Jack�
2� Turn Rotary Switch to the
position�
3� Press SeL until is displayed�
4� Connect red probe to diode’s anode
and black probe to its cathode�
5� Read measured forward biased
voltage drop on the Display�
note: If the test leads are reversed
or open, OL is displayed�
6� When testing is complete, turn
Rotary Switch to OFF, remove
Test Leads and store with Meter�
capacitance Measurements
Measure capacitance up to 66mF�
WarninG! Turn off all power and fully
discharge capacitors on the circuit
under test before measuring�
1� Plug black test lead into cOM Jack�
Plug red test lead into input Jack�
2� Turn Rotary Switch to the position�
3� Carefully touch capacitor
leads with tips of probes�
4� Read measured capacitance
on the Display�
5� When testing is complete, turn
Rotary Switch to OFF, remove
and store capacitor and Meter�
Page 15For technical questions, please call 1-888-866-5797.Item 64015
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 batteries if not in
use for long periods�
3� Store unit in a dry location�
4� Other than the batteries, 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 Test Leads from the Meter�
2� Turn the unit over�
3� Remove screw on battery cover�
4� Remove battery cover carefully�
5� Pull batteries out of unit and
replace with the same�
6� Replace cover and retighten screw�
note: Do not reverse the
polarity of the batteries�
calibration
Have the Meter calibrated by a qualified technician every year� A Meter
that is not calibrated yearly may not yield accurate results�
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�
3491 Mission Oaks Blvd. • pO Box 6009 • camarillo, ca 93011 • 1-888-866-5797
record Serial number Here:
note: If product has no serial number,
record month and year of purchase instead�
