UEi DM383B User Manual
1-800-547-5740 • Fax: (503) 643-6322
www.ueitest.com • email: info@ueitest.com
DM383B
INSTRUCTION MANUAL
Introduction
The DM383B is a handheld, battery powered digital multimeter that is
designed to meet IEC 1010-1 (EN 61010-1), standards, the EMC directive,
and other safety standards (see “Specifications”). It will measure up to
1000 volts DC and 750 Volts AC in a CAT II environment and up to 600
volts AC and DC in a CAT III environment.
Features include
• 750 volts AC and 1000 Volts DC
• 10 Amps AC and DC
• Resistance to 40 Megohms
• Diode check function
• Continuity
• 3 3/4" digit, 4000 count display
• Max capture mode
• Data hold
• On-screen range and function indicators
• CE listed CAT III
Safety Notes
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.
• Do not attempt to measure any voltage that exceeds the
ca t e g o ry b ased rating of this meter
• Do not attempt to use this meter if either the meter or the test
leads have been damaged. Turn it in for repair at a qualified
repair facility
• Ensure meter leads are fully seated by making a quick continuity
check of the leads prior to making voltage measurements
• Keep your fingers away from the test lead’s metal probe
contacts when making measurements. Always grip the leads behind
the finger guards molded into the probes
• Use a current clamp adapter when measuring current that may
exceed 10 amps. See the accessories in UEi’s full-line ca t a l o g
• Do not open the meter to replace batteries or fuses while the
probes are connected
WARNING!
Exceeding the specified limits of this meter is dangerous and can
expose the user to serious or possibly fatal injury.
• Voltages above 60 volts DC or 25 volts AC may constitute a
serious shock hazard
• 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 a circuit
• In the event of electrical shock, ALWAYS bring the victim to
the emergency room for evaluation, regardless of the victim’s
apparent recovery - Electrical shock can cause an unstable heart
rhythm that may need medical attention
• 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 the meter to the desired
function and range; connect the test leads to the meter first, then
to the circuit under test. Reapply power
• If any of the following indications occur during testing, turn
off the power source to the circuit under test:
• Arcing
• Flame
• Smoke
• Extreme Heat
• Smell of Burning Materials
• Discoloration or Melting of Components
CAUTION!
Do not attempt to re m ove the meter leads from the circuit under test.
The leads, the meter, or the circuit under test may have degraded to
the point that they no longer provide protection from the voltage and
c u r ren t applied. If any of these erroneous re a d i n gs are observed,
disconnect power immediately and recheck all settings and connections.
International Symbols
C o n t r ols and Indicators
1. Digital Display: Readings are displayed on a digital, 4000
count display, which includes the appropriate polarity
i n d i cati on, the range and function icons, and shows the decimal
point position for the selected range. (See Display Icons).
2. Power Push-button: Used to turn the power to the meter on
or off.
3. MAX Push-button: Causes the meter to record and display the
m aximum value of any function selected. The word “ M AX ”
appears in the upper right of the LCD. This feature resets only
when the push-button is pressed a second time, not when the
selector is moved.
4. Hold Push-button: Freezes the reading presently on the digital
display, and displays the words “ DATA HOL D ” on the left side of
the LCD. To cancel data hold, press the “ DATA HOL D ” b u t t o n
again. This feature resets only when the push-button is pressed a
second time, not when the selector is moved.
5. Rotary Switch: A l l o ws you to switch between any of the
functions or values indicated by the numbers, icons, and group
outlines printed around the rotating dial.
DM383B-MAN P. 1
LCD Display Functional Description
1. Indicates that the audible continuity mode has been selected.
2. Indicates that diode testing has been selected.
3. Indicates the meter is reading DC voltage or current.
4. Indicates a negative polarity measurement. (Applicable to
DC functions).
5. Indicates the meter is reading AC voltage or current.
6. Indicates that HOLD has been selected and the display is no
longer updating numerical data.
7. Indicates MAX push-button is pressed and the meter is
displaying the maximum numerical value recorded in any mode
from the time the button was pressed.
8. The following symbols represent the type and value of
measurement being made.
9. I n d i cates the battery is low and must be changed immediately
10. Indicates measured numerical values
NOTE: When OL is displayed on the LCD, it indicates the value
measured exceeds the limits of the selected range, or exceeds the
over-all limits of the meter.
6. 10 Amp, Fused, Meter Lead Terminal: Use this input
terminal (port) when measuring amps greater than 400 mA,
but less than 10 Amps AC or DC. Use caution when selecting
a m p e r age measurements on the rotary dial. Remember
a m p e r age measurements are made in series with your circuit.
7. This Symbol Reminds the User to Follow Provided
Instructions: See “Caution” in the international symbol section
of this manual.
8. Microamp/Milliamp Input Terminal: The red test lead is
plugged into this terminal when measuring current (AC or DC)
in the 400 mA and below ra n g e .
9. Common Terminal: The black test lead is plugged into this
terminal, and supplies the ground or “low” reference for all
m e a s u r e m e n t s .
10. "Flash" Symbol: Warns operators that potentially dangerous
voltages may be present. Use caution when making
high-voltage measurements.
11. Multifunctional Terminal Information: I n d i cates the
m aximum input values and ca t e g o ry r atings established
by IEC 1010 - 1 .
12. Multifunctional (Volts, Ohms, and Diode Test) Input
Terminal: Use the red test lead in this terminal for any of these
test functions.
4
1
2
12
3
6
10
5
11
987
Symbol Function or Value
V Volts
A Amps
Ω Ohms (Resistance Value)
M 1 Meg = 1,000,000
K 1 Kilo = 1,000
m 1 Milli = 0.001
µ 1 Micro = 0.000001
7
6
8
9
10
1
2
3
4
5
DM383B-MAN P. 2
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