FEATURES .................................................................................................................................................... 4
Read entire Safety Notes section regarding potential hazard 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.
• 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: 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 lockout utilization and use of personal protective equipment that
includes safety glasses, gloves and flame resistant clothing.
A. Worklight
B. Apo: Auto power off after 30 minutes of use. Press and hold the HOLD button while turning the meter on to disable Apo.
C. Digital Backlit Display
D. Bar graph: 24 segment, displays when in Low Z, Volts AC/DC, mV AC/DC, Ohms, Continuity, Diode, µA AC/DC,
mA AC/DC and Amp AC/DC modes.
E. Range Button:
• Press to change from auto ranging to manual ranging.
• Press repeatedly to select proper range.
• Press and hold to return to auto range (AT will be displayed on screen).
F. Min/Max Button:
• Press to enter MAX/MIN mode.
• In the V, A, mA or Amps function, either select AC/DC or change to manual ranging before pressing this button to
enter MAX/MIN mode.
• Press repeatedly to alternate between Maximum and Minimum readings.
• Press and hold to return to live readings.
G. Select Button:
•Press to select AC or DC or Auto Selection in the following functions: Voltage, µA, mA, Amps,
•Press to select Hz/Duty Cycle, DCmV/ACmV/°F/°C, Ohm/Continuity/Diode check/Capacitance or W/VA/VAr/PF.
H. Function Dial: Turns on meter and is used to select the function.
I. Hold/Fast Button:
• Press to hold the reading on the display. Press again to return to live reading.
• Press to enter Fast MAX/MIN mode in MAX/MIN mode.
• Press again to return to normal MAX/MIN mode.
J. Back Light/Worklight Button: Press to on back light. Press again to turn off. Press and hold to enable wireless
capability. Back light / Worklight duration is 1 minute.
K. Category Max Indicator: Maximum CAT Rating for fused input jacks.
• Multifunction input port used for measuring: AC or DC volts, AC or DC mV, Temperature, Hertz, Duty Cycle, Watts,
Resistance, Continuity, Diode, Capacitance, AC or DC Amps, AC or DC µA, AC or DC mA.
• Use CATIV test leads or higher
L. Recess for magnetic hanger
M. Test Lead Holders
N. Protective Rubber Boot
O. Battery Cover (under protective rubber boot)
P. Kick Stand
Q. Serial Number (under kick stand)
SYMBOLS
Negative
Overload: Range Exceeded
Low Battery
Maximum measured
value displayed
Low Z
Low Z
MicrofaradDegrees FahrenheitDegrees Celsius
μF
Diode
ContinuityGroundFuse
Warning or Caution
Bar graph
03060
Fast Min/Max
FAST
MegaOhms
MΩ
Relative (REL)Auto-ranging
A
C/DC Voltage or Current Auto power off Active
Hold/Capture Value
Voltage
MicroampsmAMilliamps
Nano FaradsOhms/Resistance
nF
MilliWattDuty cycle
mW
Volt-Ampere
VA
Watt
W
KiloOhmsDangerous Levels
KΩ
Auto Selection
Auto
A
VAr
PF
CATEGORY DEFINITIONS
Measurement CategoryShort-Circuit (typical) kA
II< 10
III< 50Mains distributions parts of the building
IV> 50Source of the mains installation in the building
a
Location in the building installation
Circuits connected to mains socket outlets and similar
points in the MAINS installation
Frequency
RangesAccuracyResolutionOverload Protection
99.99Hz to 999.9kHz±(0.05% +3 dgts)0.01Hz to 0.1kHz600V
Duty Cycle
RangesAccuracyOverload Protection
1.0% to 99.0%±(0.1% +3 dgts + 0.2% per kHz)600V
Relative (REL Δ) Mode
The meter will store a measurement reading (the delta) and resets display to zero. It sets a relative reference point to
measure against the measurement reading.
Wireless Capability
Press and hold the Back light button to enable the wireless capability.
Measurement of Active, Apparent and Reactive Power; W,VA, VAr
The current path be measured directly (up to 10A maximum; up to
Apo
AT
0102030405060
RANGE
If the meter activates a measuring range which is too high during
Low Z
Low Z
consumer, and discharge any capacitors.
DM525
W
HOLD
MIN/MAX
FAST
SEL
°F°C
°
REL
LINK
mV
m
Hz %
Hz %
W
W
PF
PF
A
μ
A
μ
A
A
A
m
mA
Hz
Temp
True RMS
A
A
mAμ
MAX
CAT IV
400mA
600V
MAX
CAT III
10A
FUSED
1000V
MAX
FUSED
and apparent power with the Select button (including power factor).
MIN/MAX button.
16A briefly for a maximum of 30 seconds) or with the help of current
transformers or current clamp transformers. The meter automatically
selects the range which allows for the highest possible resolution of the
applied quantities.
NOTE:
automatic measuring range selection, this may be due to peak value
monitoring. Check the crest factor of the respective signal in Volts AC or
DC or Amps AC or DC.
Significance of the Power Factor:
±1: no phase shifting -(0 to 0.99): capacitive; +(0 to 0.99) inductive
• First disconnect supply power from the measured circuit or the power
• Set the rotary function dial to W/PF.
• You can switch the display back and forth between active, reactive
• The extreme values can be displayed by pressing the
WARNING
Keep hands below guard when measuring current levels.
• Do not attempt to measure more than 10A AC.
Features:
MIN/MAX
HOLD
SEL
ACTIVE POWER
RangesAccuracyResolutionOverload Protection
5000mW to 5.000kW±(1.5% +5 dgts)1mW to 0.001kW
10.00kW±(2.0% +8 dgts)0.01kW
1000V
APPARENT POWER
RangesAccuracyResolutionOverload Protection
5000mVA to 5.000kVA±(1.2% +5 dgts)1mVA to 0.001kVA
10.00kVA±(1.5% +8 dgts)0.01kVA
1000V
REACTIVE POWER
RangesAccuracyResolutionOverload Protection
5000mVAR to 5.000kVAR±(1.5% +5 dgts)1mVAR to 0.001kVAR
10.00kVAR±(2.0% +8 dgts)0.01kVAR
1000V
POWER FACTOR
RangesAccuracyResolutionOverload Protection
• Ensure the test lead shield is pressed firmly in place. Failure to use the CATIV shield increases arc-flash risk.
CATII 1000V 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.
Battery Replacement
• When the batteries are too low for safe operation, the Low Battery indicator will display.
” to view trending data in real time during measurement.
FCC/IC INFORMATION
NOTE: This device complies with Part 15 of the FCC Rules and CAN ICES-3(A).
Operation is subject to the following two conditions: (1) this device may not cause harmful interference, and (2) this device
must accept any interference received, including interference that may cause undesired operations.
INFORMATION TO THE USER
This equipment has been tested and found to comply with the limits for a Class B digital device, pursuant to part 15 of the
FCC Rules. These limits are designedto provide reasonable protection against harmful interference in a residential installation.
This equipment generates, uses and can radiate radio frequency energy and, if not installed and used in accordance with the
instructions, may cause harmful interference to radio communications. However, there is no guarantee that interference will
not occur in a particular installation. If this equipment does cause harmful interference to radio or television reception, which
can be determined by turning the equipment off and on, the user is encouraged to try to correct the interference by one or more
of the following measures:
• Reorient or relocate the receiving antenna.
• Increase the separation between the equipment and receiver.
• Connect the equipment into an outlet on a circuit different from that to w hich the receiver is connected.
• Consult the dealer or an experienced radio/TV technician for help.
WARNING Any changes or modifications not expressly approved by the manufacturer, could void the user’s authority to
The DM525 is warranted to be free from defects in materials and workmanship for a period of 2 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
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.
fitness for a particular
DISPOSAL
CAUTION:
correct disposal.
This symbol indicates that equipment and its accessories shall be subject to separate collection and
CLEANING
Periodically clean your meters’ 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.