• Operating Temperature: 32˚ to 122˚F (0˚ to 50˚C)
Storage Temperature: -4˚ to 140˚F (-20˚ to 60˚C)
•
• Operating Humidity: <80%
• Pollution Degree: 2
• Display: 3 5/6 digits 6,000 count
• Back light: Ye s
Refresh Rate: 3/sec
•
• Over-range: “OL” is displayed
• Apo: Auto power off after 30 minutes of use.
• Dimensions: 8.7” x 2.52” x1.41”
Item Weight: 0.65 lb
•
• CAT Rating: CATIV 300V, CATIII 600V
Certifications: cETLus UL 61010-1: 2012, IP42
•
• Battery Type: (AAA) 2
• Test leads: Test lead ATL55 w/alligator clips
3
Page 4
Important Safety Warnings
WARNING
Read entire Safety Notes section regarding potential hazards and proper
instructions before using this meter. In this manual the word “WARNING” is
used to indicate conditions or actions that may pose physical hazards to the
user. The word “CAUTION” is used to indicate conditions or actions that may
damage this instrument.
WARNING
To ensure safe operation and service of the tester, follow these instructions.
Failure to observe these warnings can result in severe injury or death.
WARNING
• Before each use, verify meter operation by measuring a known voltage or
current.
• Never use the meter on a circuit with voltages that exceed the category
based rating of this meter.
• Do not use this meter during electrical storms or in wet weather.
• Do not use the meter or test leads if they appear damaged.
• Ensure meter leads are fully seated and keep fingers away from the metal
probe contact when making measurements. Always grip the leads behind
the finger guards molded into the probe. For information on test lead shields
instructions on page 19.
• Do not open the meter to replace batteries while the probes are connected.
• Use caution when working with voltages above 60 DC or 25 AC RMS. Such
voltages pose shock hazards.
• To avoid false readings that can lead to electrical shock, replace batteries if
a low battery indicator appears.
• Unless measuring voltage or current, shut off and lockout power before
measuring resistance or capacitance.
• Always adhere to national and local safety codes. Use proper personal
protective equipment (PPE) to prevent shock and arc blast injury where
hazardous live conductors are exposed.
• Always turn off power to a circuit or assembly under test before cutting,
unsoldering or breaking the current path. Even small amounts of current
can be dangerous.
• Always disconnect the live test lead before disconnecting the common test
lead from the circuit.
• In the event of electrical shock, ALWAYS bring the victim to the emergency
room for evaluation, regardless of victim’s apparent recovery. Electrical
shock can cause unstable heart rhythms that may need medical attention.
• If any of the following occur during testing, turn off the power source to the
circuit being tested: arcing, flame, smoke, extreme heat, smell of burning
materials or discoloration or melting of components.
WARNING
Higher voltages and currents require greater awareness of physical safety
hazards. Before connecting the test leads; turn off power to the circuit under
test, set meter to the desired function and range; connect the test leads to
the meter first, then connect to the circuit under test. Reapply power. If an
erroneous reading is observed, disconnect power immediately and recheck all
settings and connections.
WARNING
This meter is designed to provide HVAC/R technicians with the capabilities they
need to diagnose and repair HVAC/R system. Observe all recommended
safety procedures that include proper lockout utilization and use of personal
protective equipment that includes safety glasses, gloves and flame resistant
clothing.
4
Page 5
Symbols
k
EF
AC (Alternating current)DC (Direct current)
Negative AC/DC Voltage or Current
Auto-ranging
Auto power off ActiveNon-Contact Voltage
Low BatteryHold/Capture Value
Minimum measured
value displayed
Duty CycleHertz/Frequency
VoltageInrush
AmperageOhms/Resistance
DiodeCapacitance
Nanofarad
MicroampsContinuity
Degrees FahrenheitDegrees Celsius
Mega (x106 or 1,000,000)Milli (x10-3 or 0.001)
Kilo (x103 or 1,000)Micro (x10-6 or 0.000001)
Warning or CautionGround
Dangerous Levels
Safe for disconnect from
live conductors
Overload: Range Exceeded
Maximum measured
value displayed
Microfarad
µF
Double Insulation
(Protection to Class II)
No reading detected
Kilo Ohms
Electric Field
Category Definitions
Measurement
Category
II< 10Circuits connected to mains socket
III< 50Mains distributions parts of the building
IV> 50Source of the mains installation in the
Short-Circuit
(typical) kA
a
outlets and similar points in the MAINS
installation
building
Location in the
building installation
5
Page 6
Overview
L
A
B
CAT III
C
D
F
G
H
600V 600A
DL579
µA
V
mV
V
Low Z
RANGE
M
N
NCV
°F °C
MAX/MIN
O
P
U
AUTO
AT
I
SELECT
J
True RMS
DISCONNECT TEST LEADS
30V MAX
CATIV 300V
CATIII 600V
µ
INRUSH
TEMP
Q
V
R
S
T
W
X
K
A. Clamp: Measure inductive AC current. Opens to 1.25” (32.0mm).
B. Conductor Alignment Marks: Use to aid the visual alignment of a
conductor when measuring inductive amperage. Greatest accuracy
is achieved when the conductor inside the clamp is centered at the
intersection of these marks.
C. Category Max Indicator: Maximum CAT Rating for clamp jaw.
D. NCV Alert Light: Indicates voltage when in NCV (Non Contact Voltage)
mode and High Voltage alert.
F. Clamp Lever: Opens and closes current clamp jaw.
NOTE: The clamp uses a high-tension spring to close the jaw. Do not
allow fingers or objects to become pinched in the base as the jaws close.
G. Rotary Selector Dial: Set Rotary Selector Dial desired function
H. Range Button:
• Press to set manual range desired
I. SELECT Button:
• Press AC or DC on Low Z setting; DCmV or DCV on Voltage setting;
to activate ohms, Continuity, Diode, Capacitance on Ohms/Continuity/
Diode/Capacitance setting; AC or DC on μA setting; °C or °F
temperature setting
J. Category Max Indicator: Maximum CAT Rating for input jacks.
K. Test Lead Input Jacks: Multifunction and Positive input jacks.
• Multifunction input port used for measuring: AC or DC volts, resistance,
continuity, diode, capacitance, AC or DC μA.
L. Wire Separation Tab/ NCV sensor: Use to isolate an individual wire from
a bundle for testing. NCV sensor detects live voltage.
M. Test Lead Holder
N. Hand Guide: Used as a point of reference for the operator’s safety.
O. Hold/Back light Button:
• Press to hold the reading on the display. Press again to return to live reading.
• Press and hold to turn on Back light.
• Backlight turn off after 60 seconds.
• Press hold during power up to disable the Auto power off function.
6
Page 7
Overview (Cont.)
V
Low Z
P. Min/Max Button:
• Press to enter MIN/MAX mode.
• Step through maximum(MAX), minimum(MIN) and present values.
• Press and hold return to Live readings
Q. Display:
• High contrast dual display with backlit.
• AC Amps reading will always display on upper display.
R. Inrush/Hz Duty Button:
• Press to enter LRA Inrush mode (See page 18 for details)
(must be in AC Amps mode first).
• Press again to return to live readings.
• Press and hold to select Hz/Duty in AC volt or AC µA.
S. K-Type Temperature Probe Inputs
T. Input Jack Lock: Switch to use Temperature or Test lead inputs
U. Built-in versatile magnet to use as a mount or as a strap (optional)
V. Battery Cover: Easy access for replacing batteries without breaking
calibration seal.
W. Battery Compartment Latches
X. Serial Number
Low Z (Low Impedance)
CAT III
600V 600A
DL579
V
mV
RANGE
AUTO
AT
SELECT
µA
V
Low Z
True RMS
DISCONNECT TEST LEADS
30V MAX
CATIV 300V
CATIII 600V
NCV
°F °C
MAX/MIN
µ
INRUSH
TEMP
Low Z
•
Rotate Selector Dial to Low Z
• Default = Auto Selection (DC or AC)
• Press SELECT x1 =
• Press SELECT x2 =
Features:
SELECT
7
Page 8
AC Amps <600A Jaw
V
Low Z
CAT III
600V 600A
DL579
NCV
°F °C
µA
V
mV
V
Low Z
RANGE
MAX/MIN
AUTO
µ
AT
True RMS
DISCONNECT TEST LEADS
30V MAX
SELECT
INRUSH
TEMP
CATIV 300V
CATIII 600V
• AC Amps can be measured in any position of the rotary selector dial.
• Center wire in guides for best accuracy.
• Opposing currents cancel each other (use line-splitter when necessary).
• Keep hands below guard when measuring high current levels.
• Do not attempt to measure more than 600A AC.
Features:
AC Amps Measurement - Jaw input
RangeResolutionAccuracyOverload Protection
60.00A0.01A
600.0A0.1A
±2.0% + 8dgts600V RMS
45Hz to 400Hz True RMS
Minimum Current for Clamp Measurement: 0.3A
Single
Conductor
Only
• Rotary selector dial =
any position
• Reading show on
upper display
8
Page 9
Non-Contact Voltage
AUTO
NCV Sensor in the tip.
CAT III
600V 600A
DL579
NCV
°F °C
µA
V
mV
V
Low Z
RANGE
MAX/MIN
AUTO
µ
AT
True RMS
DISCONNECT TEST LEADS
30V MAX
SELECT
INRUSH
TEMP
CATIV 300V
CATIII 600V
• Rotate Rotary Selector Dial to NCV position move the tip of the clamp meter
near voltage source.
• Non-Contact Voltage Detection is used to detect power with sensor located
in the tip of the clamp head, indicates positive response with both an
Audible and Visual alert.
• Do not use Non-contact voltage detector to determine if there is current on
the wire. Detection operation could be affected by socket design, insulation
thickness, type or other factors.
• Voltage indicator light may also light when voltage (>AC/DC 30V) is present
on the meter’s input jack or from an external interference such as motors,
flashlights, etc.
Features:
On Voltage
Approx. 24V AC
9
Page 10
AUTO
µ
AC/DC Microamps: <2000µA
CAT III
600V 600A
DL579
NCV
°F °C
µA
V
mV
V
Low Z
RANGE
MAX/MIN
AUTO
µ
AT
True RMS
DISCONNECT TEST LEADS
30V MAX
SELECT
INRUSH
TEMP
CATIV 300V
CATIII 600V
WARNING
• Do not attempt to measure more than 2000µA.
Features:
SELECT
DC Microamps Measurement -Test lead input
RangeResolutionAccuracyOverload Protection
600.0uA0.1uA
2000uA1uA
AC Microamps Measurement -Test lead input
RangeResolutionAccuracyOverload Protection
600.0uA0.1uA±2.0% + 5dgts
2000uA1uA±1.5% + 5dgts
45Hz to 400Hz True RMS
• Default =
• Press SELECT =
• Readings show on lower display
±1.2% + 3dgts600V RMS
600V RMS
10
Page 11
Temperature °F/°C
AUTO
°F
CAT III
600V 600A
DL579
NCV
°F °C
µA
V
mV
V
Low Z
RANGE
MAX/MIN
AUTO
µ
AT
True RMS
DISCONNECT TEST LEADS
30V MAX
SELECT
INRUSH
TEMP
CATIV 300V
TEMP
CATIII 600V
• Disconnect test lead probes from voltage source and meter.
• Move Input Jack Locks to “TEMP” setting.
• Use K-T
ype thermocouple temperature probes only.
• Stated accuracy does not account for thermocouple accuracy.
Features:
SELECT
RangeResolution AccuracyOverload Protection
-328° to 999°F
(-200° to 999°C)
1000° to 2462°F
(1000°C to 1350°C)
0.1°F±(1.0% + 3.6°F)
(0.1°C)±(1.0% + 2.0°C)
1°F±(1.0% + 3°F)
(1°C)±(1.0% + 2°C)
Temp
• Press SELECT = ˚F or ˚C
• Readings show on lower display
30V RMS
Temperature Calibration
The new DL579 clamp meter offers a digital field temperature calibration
procedure to make the process easier. Here are the steps.
1) Set dial position to “°F°C”
2) Press and hold SELECT button for about 2 seconds
3) Press HOLD button while “FCAL” is displayed on top LCD to enter
Field Calibration.
4) After immersing temperature probe in ice bath and temperature is stable,
press and hold Hz/Duty button
11
Page 12
AUTO
kΩ
Continuity
AUTO
Ω
CAT III
600V 600A
DL579
NCV
°F °C
µA
V
mV
V
Low Z
RANGE
MAX/MIN
AUTO
µ
AT
True RMS
DISCONNECT TEST LEADS
30V MAX
SELECT
INRUSH
TEMP
CATIV 300V
CATIII 600V
• Default =
• Press SELECT x1 =
• Buzzer sounds at less than < 40Ω.
WARNING
• Do not measure resistance on a live circuit.
Features:
SELECT
Open circuit voltage < 0.64VOverload Protection
Threshold Approx : < 40Ω600V RMS
Resistance: < 60MΩ
CAT III
600V 600A
DL579
NCV
°F °C
µA
V
mV
V
Low Z
RANGE
MAX/MIN
AUTO
µ
AT
True RMS
DISCONNECT TEST LEADS
30V MAX
SELECT
INRUSH
TEMP
CATIV 300V
CATIII 600V
• Default =
• Press RANGE to
select resolution
Features:
SELECT
WARNING
• Do not measure resistance on a live circuit.
RangeResolutionAccuracyOverload Protection
600.0Ω0.1Ω
6.000kΩ0.001kΩ
60.00kΩ0.01kΩ
600.0kΩ0.1kΩ
±1.0% + 4dgts
600V RMS
6.000MΩ0.001MΩ
60.00MΩ0.01MΩ±2.0% + 4dgts
12
Page 13
Capacitance
F
AUTO
µ
CAT III
600V 600A
DL579
NCV
°F °C
µA
V
mV
V
Low Z
RANGE
MAX/MIN
AUTO
AT
True RMS
DISCONNECT TEST LEADS
30V MAX
SELECT
INRUSH
TEMP
CATIV 300V
CATIII 600V
• Default = Ω
• Press SELECT x3 =
• Press RANGE to select resolution
µ
Features:
SELECT
RangeResolutionAccuracyOverload Protection
60.00nF
600.0nF
6.000uF
60.00uF
600.0uF
6000uF
0.01nF
0.1nF
0.001uF
0.01uF
0.1uF
1uF
3.5% + 6dgts600V RMS
WARNING To avoid damaging the meter or equipment under test, safely
discharge Capacitors before measuring capacitance. Large value capacitors
should be discharged through an appropriate resistance load. Use the DC
Voltage function to confirm the capacitor discharge.
13
Page 14
GOOD DIODE
V
Reverse Bias
Displays "OL"
Forward Bias
Displays approx.
voltage drop
BAD DIODE
600V 600A
DL579
V
mV
V
RANGE
AUTO
AT
True RMS
30V MAX
SELECT
Diode
CAT III
NCV
°F °C
µA
Low Z
MAX/MIN
DISCONNECT TEST LEADS
INRUSH
TEMP
CATIV 300V
CATIII 600V
• Default = Ω
• Press SELECT x2 =
µ
Open Diode
Displays "OL"
or
VV
Both directions
• Forward voltage drop if forward biased.
• “O.L.” if reverse biased.
Features:
SELECT
Diode Test
Range Open Circuit Voltage Test Current(Typical) Overload Protection
6.0V< 3.0V DC0.25mA600V RMS
'0' Both directions
14
Page 15
INRUSH
Voltage 750V AC
CAT III
600V 600A
DL579
NCV
°F °C
µA
V
mV
V
High
Voltage
Alert
Low Z
RANGE
AUTO
AT
True RMS
DISCONNECT TEST LEADS
30V MAX
SELECT
CATIV 300V
CATIII 600V
WARNING
• Use CATIII rated test leads or higher.
• Do not attempt to measure more than 750V AC.
• Keep hands below line when measuring high current levels.
WARNING
• High Voltage indicator will display and audible alert will sound over 600V AC
• High Voltage indicator will display (without audible alert) over 30V AC
Features:
• Default =
MAX/MIN
• Press RANGE to select resolution
µ
INRUSH
TEMP
RangeResolutionAccuracyOverload Protection
600.0mV0.1mV
6.000V0.001V
60.00V0.01V
±2.0% + 5dgts750V RMS
600.0V0.1V
750V1V
True RMS: 45Hz to 400Hz
15
Page 16
Voltage 1000V DC
CAT III
600V 600A
DL579
NCV
°F °C
µA
V
mV
V
High
Voltage
Alert
Low Z
RANGE
AUTO
AUTO
AT
True RMS
DISCONNECT TEST LEADS
30V MAX
SELECT
CATIV 300V
CATIII 600V
WARNING
• Use CATIII rated test leads or higher.
• Do not attempt to measure more than 1000V DC.
• Keep hands below line when measuring high current levels.
WARNING
• High Voltage indicator will display and audible alert will sound over 600V DC
• High Voltage indicator will display (without audible alert) over 30V DC
• Default =
• Press SELECT= m
MAX/MIN
• Press RANGE to select resolution
V
µ
INRUSH
TEMP
Features:
SELECT
DC Volts
RangeResolutionAccuracyOverload Protection
600.0mV0.1mV
6.000V0.001V
60.00V0.01V
±0.5% + 4dgts
1000V RMS
600.0V0.1V
1000V1V±0.8% + 10dgts
16
Page 17
INRUSH
Frequency (Hz)/Duty Cycle (%)
AUTO
Hz
CAT III
600V 600A
DL579
NCV
°F °C
µA
V
mV
V
Low Z
RANGE
MAX/MIN
AUTO
µ
AT
True RMS
DISCONNECT TEST LEADS
30V MAX
SELECT
INRUSH
TEMP
CATIV 300V
CATIII 600V
Use CAT III rated leads or higher.
Rotate Rotary selector Dial to position select AC voltage, press and hold the
button for Frequency and Duty Cycle modes.
WARNING
Do not attempt to measure more than 750V AC.
Features:
Frequency Measurement - Test lead input
RangeResolutionAccuracyOverload Protection
99.99Hz0.01Hz
999.9Hz0.1Hz
9.999kHz0.001kHz
99.99kHz0.01kHz
Minimum Frequency: 0.5Hz, DC V offset should be zero
Sensitivity: > 10% of each AC volt range except 4V (>20%) range only
Duty Cycle - Test lead input
RangeAccuracyOverload Protection
1.0 to 99.0%±(0.2% per kHz + 0.1% + 5 dgts) 1000V RMS
• Default = Volts AC
• Press and hold Hz/Duty/INRUSH =
• Press and hold Hz/Duty/INRUSH x2=
0.1% + 4dgts1000V RMS
17
Page 18
LRA Inrush
AUTO
Hz
INRUSH
CAT III
600V 600A
DL579
NCV
°F °C
µA
V
mV
V
Low Z
RANGE
MAX/MIN
AUTO
µ
AT
True RMS
DISCONNECT TEST LEADS
30V MAX
SELECT
INRUSH
TEMP
CATIV 300V
CATIII 600V
The UEi LRA Inrush is programmed to properly capture the starting current
for compressor motors. Inrush current can be measured in any position of
the rotary selector Dial.
• Select the range capable of capturing the maximum value.
• Press the INRUSH button – INRUSH will now be shown on the screen.
• Activate the compressor and read value on the display.
• Press the INRUSH button to return to live readings.
INRUSH
• Rotary selector Dial = any position
• Press INRUSH
• Readings show on upper display
18
Page 19
Test Lead Notes
4mm
LOCK
OPEN
Cat IV and CAT II Measurement Locations
4mm
• Ensure the test lead shield is pressed firmly in place. Failure to use the CAT
IV shield increases arc-flash risk.
CAT II Measurement Locations
18mm
• CAT IV shields may be removed for CAT II locations. This will allow testing
on recessed conductors such as standard wall outlets. Take care not to lose
the shields.
WARNING: Test Lead category protections apply only to test leads and
should not be confused with the meter’s specific CAT rating. Observe the
maximum category protection indicated on the meter the test leads are
plugged into.
CAUTION: If the test leads need to be replaced, you must use a new one
which should meet EN 61010-031 standard, rated CATIII 1000V or better.
Battery Replacement
• Rotate Battery Compartment Latches to open
position
• Remove battery cover
• Replace the old batteries with 2 new (AAA)
batteries
• Replace the battery cover
• Rotate Battery Compartment Latches to lock
OPEN
LOCK
19
Page 20
Warranty
The DL579 is warranted to be free from defects in materials and workmanship
for a period of 1 year from the date of purchase. If within the warranty period
instrument should become inoperative from such defects, the unit will
your
be repaired or replaced at UEi’s option. This warranty covers normal use and
does not cover damage which occurs in shipment or failure which results
from
alteration, tampering, accident, misuse, abuse, neglect or improper
maintenance. Batteries and consequential damage resulting from failed
batteries are not covered by warranty.
implied warranties, including but not limited to implied warranties of
Any
merchantability and fitness for a particular purpose, are limited to the express
warranty. UEi shall not be liable for loss of use of the instrument or other
incidental or consequential damages, expenses, or economic loss, or for any
claim or claims for such damage, expenses or economic loss.
Warranty only covers hardware and does not extend to software applications.
purchase receipt or other proof of original purchase date will be required
A
before warranty repairs will be rendered. Instruments out of warranty will be
repaired (when repairable) for a service charge.
This warranty gives you specific legal rights. You may also have other rights,
which vary from state to state.
Disposal
CAUTION: This symbol indicates that equipment and its accessories
shall be subject to separate collection and correct disposal.
Cleaning
Periodically clean your meter’s case using a damp cloth. DO NOT use abrasive,
flammable liquids, cleaning solvents, or strong detergents as they may damage the
finish, impair safety, or affect the reliability of the structural components.
Storage
Remove the batteries when instrument is not in use for a prolonged period of time.
Do not expose to high temperatures or humidity. After a period of storage in extreme
conditions exceeding the limits mentioned in the General Specifications section, allow
the instrument to return to normal operating conditions before using it.