UEi DL369, DL379B, DL389 Instruction Manual

DL369/DL379B/DL389

INSTRUCTION MANUAL

ENGLISH

CAT III

600V

400A

DL379B

µA

Hi-NCV-Lo

MFD

TEMP

30V

DISCONNECT TEST LEADS

CATIII 600V

CATIV
300V

99 Washington Street
Melrose, MA 02176

Phone [phone]
Toll Free 1-800-517-8431

Visit us at www.TestEquipmentDepot.com

FEATURES

• 3 ¾ digit, 4000 count LCD display

• Auto-ranging with manual ranging capability

• MIN/MAX (Peak Hold). All ranges except capacitance & frequency.

• Frequency, duty cycle, data hold

• Auto power off

• Dual display

• Built-in test lead storage

• Backlit display + Worklight (DL379B & DL389)

• Detachable current clamp head (DL379B & DL389)

• Temperature (DL379B & DL389)

• Magnetic mount (DL379B & DL389)

• True RMS measurement (DL389 only)

SAFETY NOTES

Warning

Refer to user guide regarding potential hazard and proper instructions.
Before using this meter, read all safety information carefully. 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

• 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.

• Keep your fingers away from the test lead’s metal probe contacts when
making measurements.

• Ensure meter leads are fully seated and keep fingers away from metal
probe contact when making measurements. Always grip the leads
behind the finger guards molded into the probe.

• Do not open the meter to replace batteries white the probes are
connected.

• Use caution when working with voltages above 60V DC or 25V 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 lock out power before
measuring resistance or capacitance.

• Always adhere to national and local safety codes. Use proper personal
safety 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 or current
can be dangerous.

• Always disconnect the live test leads 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: arching, 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 for trade professionals who are familiar with the
hazards of their trade. Observe all recommended safety procedures that
include proper lock-out utilization and the user of personal protective
equipment that includes safety glasses, gloves and flame resistant clothing.

Symbol Definitions

Equipment is safe for
connection and disconnection

Ground

to Live conductors
AC

~

Alternating Current
DC
Direct Current
Not Applicable to
Identified Model

Warning or Caution

Double Insulation
(Protection Class II)

Battery

Category Definitions

Measurement

Category

Short-Curcuit

(typical) kA

a

Location in the

building installation

II < 10 Circuits connected to mains socket

outlets and similar points in the
MAINS installation

III < 50 Mains distributions parts of the

building

IV > 50 Source of the mains installation in

the building

Test Equipment Depot - 800.517.8431 - 99 Washington Street Melrose, MA 02176

TestEquipmentDepot.com

CONTROLS AND INDICATORS

2

1
3

CAT III

600V

400A

4

5

6

DL379B

µA

Hi-NCV-Lo

7
8
9

10

MFD

11

12
13
15

TEMP

14
18

30V

DISCONNECT TEST LEADS

CATIII 600V

CATIV
300V

19

1. Clamp jaw: Measure inductive AC current. Jaw opens to 1.25” (32mm).

2. Wire Separation Tab/NCV Sensor: Used to isolate an individual wire
from a bundle for testing. NCV sensor helps detect live voltage.

3. Conductor Alignment Marks: Used to aid in 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.

4. Test Lead Holder: Used for hands-free use of one of the test probes.

5. Hand Guard: Used as a point of reference for the operator’s safety.

Warning

Always keep your hands and fingers behind the hand guards when
measuring current on exposed conductors. Contact may result in serious
injury.

6. 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 hinge as jaws close.

7. NCV (Non-Contact Voltage) Button: Activates non-contact voltage
function. Dual level indication on DL379B only.

8. Range Button: Used to select range for upper and lower display
readings.

9. Hold/Backlight Button: Freezes readings or activates backlight and
worklight. (Worklight available on DL379B and DL389)

10. Min/Max Button: Activates MIN/MAX capture function, cycles through
minimum and maximum values. Press and hold for 2 seconds to return to
live readings.

11. Rotary Function Switch: Turns meter on and is used to select the range
or function.

12. Upper Display: Used to display current when measuring with the clamp
head, or UEi’s optional current hook adapter. Displays output from other
accessories when connected to UEi’s meter base.

13. Lower Display: Used to display input to test lead jacks. Includes AC/
DC volts, frequency, resistance, diode, capacitance and AC/DC
microamps (µA).

14. Select Button: Used to choose a measurement mode from selections
with multiple options such as AC or DC volts; AC or DC microamps;
resistance, diode, capacitance or continuity; Fahrenheit or Celsius.

15. Temperature Input Jack: Input jack for K-type thermocouple probe
(available on DL379B and DL389).

16. Temperature Input Jack Lock: Move switch down to measure
temperature.

NOTE: Test leads must be removed from input jacks prior to operating
the temperature function.

17. Hz/Duty Cycle Button: Used to toggle between frequency and duty cycle
when in AC voltage measurement mode.

18. Common Terminal: The black test lead is plugged into this input jack to
supply ground or “low” reference for all measurements.

19. Maximum Category Indicator: Indicates maximum voltage for the rated
working category.

Warning

DO NOT exceed 1000V DC or AC RMS at either the common or
multifunction input jacks as measured from earth ground.

16
17
20

20. Multifunction Input Jack: Used for measuring AC/DC volts, frequency,
duty cycle, resistance, diode, continuity, and capacitance.

Warning

Use CAT III listed test leads or higher. DO NOT attempt to measure more
than 1000V DC, 750V AC or 2000µA DC.

Displays and Indicators

Location of function icons on display may vary be model number.

~

AC indicator

DC indicator

-

M

AX

MIN

A (top display)

ADP (top display)

Indicates a negative value (DC negative voltage)

Maximum value displayed

Minimum value displayed

Displaying Amps from clamp jaw or adapter

Displaying value from adapter

Low battery indication

HOLD

Hold function

Diode function

Continuity function

nF / µF

nA
Hz

%

mV

APO

AT

O.L.

Ω

°F
°C

Capacitance function (nanofarads or microfarads)

Microamps function (1µA is 0.000001 Amp)

Frequency function

Duty cycle function

Millivolts function (1 mV is 0.001 Volt)

Auto power off is active

Auto Range mode is active

Displayed if input value exceeds selected range

Resistance function

Degrees Fahrenheit

Degrees Celsius

WARRANTY

The DL369/DL379B/DL389 is warranted to be free from defects in materials
and workmanship for a period of three years from the date of purchase.
If within the warranty period your instrument should become inoperative
from such defects, the unit will 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.

Any implied warranties, including but not limited to implied warranties
of 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.

A purchase receipt or other proof of original purchase date will be required
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.

OPERATING INSTRUCTIONS

FIL CONDUCTEUR ROUGE

FIL CONDUCTEUR NOIR

Auto Power Off

After powering off, the meter will turn on again when you change ranges,
rotate the selector dial or press a button.

NOTE: The APO is disabled during MIN/MAX mode.

Backlight/Worklight (DL379B and DL389 only)

Press and hold the HOLD button for 2 seconds to activate. Lights
automatically turn off in 2 minutes to save battery life.

NOTE: After activating the lights, quick press to activate the hold mode.

Automatic / Manual Range

The meter defaults to auto range mode and AT is indicated on the display
while active. Press the RANGE button to cycle through available ranges.
Selecting a specific range will put the meter in manual range mode and AT
will no longer be displayed on screen. Press and hold the RANGE button to
return to auto ranging mode.

NOTE: Manual ranging will provide a faster input response over auto

range.

MIN/MAX

When using the MIN/MAX capture mode for amps, it is recommended that
you first select the range of the expected maximum value. If this is not done
it will lock in the lowest range for the initial measurement. If the maximum
value exceeds this range the meter will capture O.L. as the maximum value.

Data Hold

Press the HOLD button to activate. This will freeze the reading and range in
the display for review.

Measuring AC Amps

• Press SELECT to change
between AC/DC

• Press RANGE to select range
prior to using MAX/MIN.

WIRE CURRENT

Measuring AC/DC Volts

FIL CONDUCTEUR NOIR

FIL CONDUCTEUR ROUGE

Measuring Frequency or Duty Cycle

NOTE: Max capture is useful for

motor inrush current.

LINE SPLITTER

• Press SELECT to change
between AC/DC

• Must be AC Volt or AC µA
mode

• Press HZ/DUTY to select and
change between frequency or
duty cycle

NOTE: Frequency greater than
1MHz will display 0.000

Measuring Resistance and Capacitance

Warning

DO NOT measure resistance on a live circuit.

Warning

Safely discharge capacitor before measurement.

NOTE: Leave meter connected to the capacitor for 10 seconds allowing the
reading to settle. Larger capacitors could take up to 60 seconds.

Measuring Continuity and Diode

Press SELECT to change between continuity and diode

NOTE: Continuity tone sounds at approximately <50Ω.

NOTE: Shows voltage drop if forward biased and O.L. if reversed biased.

Measuring Temperature (DL379B and DL389 only)

Warning

Disconnect test lead probes from
voltage source and meter.

• Slide temperature input
jack lock switch down prior to
connecting temperature probe.

• Press SELECT to change
between Fahrenheit or Celsius.

Temperature Calibration

• Connect temperature probe as directed above.

• Remove battery cover. Place temperature probe in a known standard
temperature. Stirred crush ice in distilled water can be used for 32°F.

• Adjustments are made by accessing the potentiometer through the lower
right access port in the battery compartment.

• Using a fine tip standard screwdriver, adjust the potentiometer to 32°F
(0°C).

Measuring Non-Contact Voltage

• Press and hold the NCV button and move the sensor tip on the clamp
head near the voltage source. Both a visual and audible alert will indicate
voltage.

• The DL379B Hi/Lo NCV indicates LOW voltage at <120V and HIGH voltage
at >120V.

• NOTE: The worklight will be disabled during NCV tests.

Attaching / Detaching Clamp Heads

• To detach the clamp head first unplug all test leads and probes. Firmly
grab clamp head and base and pull apart. When attaching a clamp head
or attachment, align heads and push together ensuring the heads lock
together securely.

NOTE: Leaving clamp head or attachment plugged in will drain battery.

PERIODIC SERVICE

Warning

Repair and service of this instrument is to be performed by qualified
personnel only. Improper repair or service could result in physical
degradation of the meter, altering the protection from electrical shock
and personal injury this meter provides to the operator. Perform only the
maintenance task you are qualified to do.

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.

Battery Replacement

Remove screws from battery compartment cover on back of meter and
remove cover. Replace batteries with fresh batteries paying attention to
polarity position. Replace cover and screws.

SPECIFICATIONS

DC Volts

Range Resolution Accuracy Overload Protection

400mV 0.1mV
4V 1mV

40V 10mV
400V 100mV
1000V 1V

±(0.5% + 4 dgts)

±(0.8% + 10 dgts)

1000V RMS

AC Volts (45Hz to 400Hz)

Range Resolution Accuracy Overload Protection

400mV 0.1mV
4V 1mV

40V 10mV
400V 100mV
750V 1V

±(2.0% +5 dgts) 750V RMS

AC Amps Measurement - Jaw Input (45~400Hz)

Range Resolution Accuracy Overload Protection

40A 0.01A
400A

DL369: 400A range only
DL389: 45Hz to 400Hz True RMS (Crest factor<3:1)

0.1A

±(2.9% + 15 dgts)

±(1.9% + 8 dgts)

400A

DC Low Amps Measurement (Test Lead Input)

Range Resolution Accuracy Overload Protection

400µA 0.01µA
2000µA

0.1µA

±(1.2% + 3 dgts) 2000µA/600V RMS

AC Low Amps Measurement (Test Lead Input 45Hz to 400Hz)

Range Resolution Accuracy Overload Protection

400µA 0.01µA
2000µA

DL389: 45Hz to 400Hz True RMS (Crest factor<3:1)

0.1µA

±(2.0% + 5 dgts)

±(1.5% + 5 dgts)

2000µA/600V RMS

Resistance

Range Resolution Accuracy Overload Protection

400Ω 100mΩ
4kΩ

40kΩ 10Ω
400kΩ 100Ω
4MΩ 1kΩ
40MΩ 10kΩ ±(2.0% + 4 dgts)

1Ω

±(1.0% + 4 dgts)

600V RMS

Capacitance Measurement

Range Resolution Accuracy Overload Protection

40nF 0.01nF
400nF 0.1nF
4µF 0.001µF
40µF 0.01µF

400µF 0.1µF
4000µF 1µF

DL379B: Capacitance range to 2000µF

±(3.5% + 6 dgts)

600V RMS

Diode Test

Range Open Circuit V Test Current Overload

2.0V <1.6V DC 0.25mA 600V RMS

Frequency Measurement

Range Resolution Accuracy Overload Protection

9.999Hz 0.001Hz

99.99Hz 0.01Hz

999.9Hz 0.1Hz

9.999kHz 1Hz

±(0.1% + 4 dgts)

600V RMS

99.99kHz 10Hz

199.9kHz 100Hz

Minimum Frequency: 0.5Hz, DC V offset should be zero
Sensitivity: >10% of each AC Volt range except 4V (>20%) range only

Temperature Measurement

Range Resolution Accuracy Overload Protection

-22˚ ~ 14˚F
15˚ ~ 752˚F
(-30˚ ~ -10˚C)
(-9˚ ~ 400˚C)

0.1˚F

(0.1˚C)

±(1.0% +5.4˚F)
±(1.0% + 3.6˚F)
(1.0% +3.0˚C)
(±1.0% + 2.0˚C)

30V RMS

Duty (%) Cycle Measurement

Range Accuracy

01. to 99.9%

0.5Hz to 100kHz (pulse width >2µsec)

±(0.2% per kHz +0.1%) + 5 counts

Overload
Protection

600V RMS

Continuity Measurement