Universal Enterprise DM400 Installation Manual

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DM400

INSTRUCTION MANUAL

Introduction

The DM400 has an excellent combination of features, packaged in a small
size, rugged, boot protected case. The autoranging ca p a b i l i ty e liminates
your searching for the right range prior to making a measurement.

MIN / M A X ca p a b i l i ty l ets you make measurements while you are not even
there: great for catching fluctuating voltage, current or resistance. Merely
engage the record mode and the meter will capture highs and lows for
y o u .

Features include

• 3-3/4 digit, 4000 count display

• Autoranging with manual ranging override

• Fused 400 milliamp and 10 amp ranges

• Basic DC voltage accuracy of 0.5%

• 400 millivolt AC range for 45 Hz to 100 Hz

• MIN/MAX recording function

• Data hold

• Audible continuity indicator

• Diode test function

• 600 volt input protection in the ohms function

• Surge voltage protection

• Water resistant

• Hold and low-battery annunciators

• Auto polarity

• Rubber boot

• Large LCD display

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 600 volts DC
or AC - RMS

• 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 remove 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
current applied. If any of these erroneous readings are observed,
disconnect power immediately and recheck all settings and connections

International Symbols

DM400-MAN P. 1

8. 10 Ampere Maximum, Fused, Meter Lead Terminal: Use this

input port when measuring amperages greater than 400 mA, but
less than 10 amps AC or DC. This instrument is protected by a fast
acting fuse on this terminal.

9. A (ampere input terminal): The red test lead is plugged into this

terminal when measuring current (AC or DC) in the 400 mA to
10 amp ra n g e .

10. COM (common terminal): The black test lead is plugged into

this terminal and supplies the ground or “low” reference for
a measurements.

11. Multifunctional Terminal Information: I n d i cates the maximum

input values, and indicates the terminal is fused.

12. Multifunctional (Volts, Ohms, and Diode Test) Input

Terminal: Use the red test lead in this terminal for any of these test
functions. Use caution when selecting amperage measurements on
the rotary dial. Remember amperage measurements are made in
series with your circuit.

13. Maximum Voltage Potential to be Applied at this Terminal:

Do not connect to more than 600 V with respect to earth ground.

C o n t rols and Indicators

1. Digital Display: Readings are displayed on a digital, 4000
count display, along with the appropriate polarity indication and

range and function annunnciators (icons). The decimal point moves
a u t o m a t i cal ly in the autoranging mode and remains in place when
recording or when the range is manually selected.

2. Power Push-button: Used to turn the power to the meter on
or off.

3. Function Push-Button: Switches between DC and AC when

measuring amperes or volts. When DC is selected, the symbol “DC”
is displayed, and when AC is selected, the symbol “AC” is displayed.
It also switches between resistance and continuity when that func­tion is selected on the dial.

4. Range Hold Push-button: Selects the “Manual Ranging” mode

of operation. The symbol “R . H” is displayed when the button is
pressed. Each subsequent press of this button changes the range as
i n d i cated by the annunciators and the decimal point placement. An
audible beep is heard whenever the range changes. To return to
the autoranging mode of operation, press and hold this button for
two seconds, or change the rotary dial to any other measurement
function. “R . H ” will disappear from the top of the display, and “AT”
will appear on the lower left of the display.

5. Record Push-button: After selecting the mode ad range, this
function allows the meter to store the highest and lowest readings
obtained. Pressing “REC” locks the meter in the range it is in at that
moment, and begins the recording process. Each time a new high
or low value is recorded, an audible beep sounds. When the “REC”
button is pressed a second time, the annunciator “M AX” appears
at the top of the display, while the maximum recorded value is
displayed. When the “REC” button is pressed a third time, the
“MIN” annunciator appears at the top of the display, while the
minimum recorded value is displayed. While you are viewing the
“M AX” or “MIN” values, a newly recorded high or low value will
be displayed. Pressing the button again will return you to
monitoring real-time readings. Cycling through these modes will
not affect the values in memory. To exit the record mode, press
and hold the “REC” button for two seconds. The meter will return
to the autoranging mode, unless the meter is in the 400 mV (DC or
AC) ra n g e .

6. Data Hold Push-Button: Freezes the reading presently on the
digital display, and displays the annunciator “D . H”. To cancel data
hold, press the “Data Hold” push-button again, or select any other
measurement function.

7. Rotary Switch: A l l ows you to switch between any of the functions
i n d i cate d by the annunciators printed around the rotary switch.

• µA: Microamperes DC/AC

• mA: Milliamperes DC/AC

• A: Amperes DC/AC

• V: Volts DC/AC

• Ω : Resistance or continuity

• : Diode test

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