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 eliminates
your searching for the right range prior to making a measurement.
MIN / M AX ca p a b i l i ty lets 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
