Greenlee DM-25 Manuale utente
INSTRUCTION MANUAL
52059485 REV 1 © 2012 Greenlee Textron Inc. 1/12
DM-25
Digital Multimeter
2
Description
The Greenlee DM-25 Digital Multimeter is a hand-held testing device with the
following measurement capabilities: AC and DC voltage, and resistance. This
meter also checks diodes, verifies continuity, and tests 1.5 V and 9 V batteries.
Safety
Safety is essential in the use and maintenance of Greenlee tools and equip-
ment. This instruction manual and any markings on the tool provide informa-
tion for avoiding hazards and unsafe practices related to the use of this tool.
Observe all of the safety information provided.
Purpose of This Manual
This instruction manual is intended to familiarize all personnel with the
safe operation and maintenance procedures for the Greenlee DM-25 Digital
Multimeter.
Keep this manual available to all personnel. Replacement manuals are avail-
able upon request at no charge at www.greenlee.com.
Do not discard this product or throw away!
For recycling information, go to www.greenlee.com.
All specifications are nominal and may change as design improvements occur.
Greenlee Textron Inc. shall not be liable for damages resulting from misapplication or
misuse of its products.
® Registered: The color green for electrical test instruments is a registered trademark of
Greenlee Textron Inc.
KEEP THIS MANUAL
DM-25
3
SAFETY ALERT SYMBOL
This symbol is used to call your attention to hazards or unsafe practices
which could result in an injury or property damage. The signal word,
defined below, indicates the severity of the hazard. The message after the
signal word provides information for preventing or avoiding the hazard.
Immediate hazards which, if not avoided, WILL result in severe injury or
death.
Hazards which, if not avoided, COULD result in severe injury or death.
Hazards or unsafe practices which, if not avoided, MAY result in injury or
property damage.
Read and understand this material before operating
or servicing this equipment. Failure to understand how
to safely operate this tool could result in an accident
causing serious injury or death.
Important Safety Information
4
Electric shock hazard:
Contact with live circuits could result in severe injury
or death.
Electric shock hazard:
•The test leads supplied with this product comply with IEC 61010-
031:2008, UL 61010-031:2010 and CAN/CSA-C22.2 NO. 61010-031A-
07–Amendment 1:2010. These safety standards limit the exposed length
of the probe tip to 4 mm for measurement category III. These test leads
include a cap that must be in place when used in measurement category
III applications.
•Do not apply more than the rated voltage between any two input termi-
nals, or between any input terminal and earth ground.
•Do not contact the test lead tips or any uninsulated portion of the
accessory.
Failure to observe these warnings could result in severe injury or death.
Important Safety Information
DM-25
5
Electric shock and fire hazard:
•Do not expose this unit to rain or moisture.
•Do not use the unit if it is wet or damaged.
•Inspect the test leads before use. They must be clean and dry, and the
insulation must be in good condition. Do not use the unit if the contrasting
inner layer of insulation is visible.
•Use this unit for the manufacturer’s intended purpose only, as described in
this manual. Any other use can impair the protection provided by the unit.
Failure to observe these warnings could result in severe injury or death.
Electric shock hazard:
•Do not operate with the case open.
•Before opening the case, remove the test leads from the circuit and shut
off the unit.
Failure to observe these warnings could result in severe injury or death.
Electric shock hazard:
•Unless measuring voltage, shut off and lock out power. Make sure that all
capacitors are discharged. Voltage must not be present.
•Set the selector and connect the test leads so that they correspond to the
intended measurement.
•Using this unit near equipment that generates electromagnetic interfer-
ence can result in unstable or inaccurate readings.
Failure to observe these warnings could result in severe injury or death.
Important Safety Information
6
Important Safety Information
Electric shock hazard:
Do not change the measurement function while the test leads are connected
to a component or circuit.
Failure to observe this precaution may result in injury and can damage the
unit.
Electric shock hazard:
•Do not attempt to repair this unit. It contains no user-serviceable parts.
•Do not expose the unit to extremes in temperature or high humidity. Refer
to “Specifications.”
Failure to observe these precautions may result in injury and can damage
the unit.
Note: The test leads of this unit are not removable. Do not attempt to remove
them.
DM-25
7
Identification
Display Icons
4. HV 600 V AC or DC range selected
5. –Polarity indicator
6. Low battery indicator
7. 1Overload indicator
Symbols on the Unit
Warning—Read the instruction manual
Battery
Double insulation
1
2
3
4
5
6
7
1. LCD display
2. Selector to select a function or
turn power off
3. Permanently attached test
leads and probes
8
Using the Test Leads
Electric shock hazard:
The test leads supplied with this product comply with IEC 61010-031:2008,
UL 61010-031:2010 and CAN/CSA-C22.2 NO. 61010-031A-07–Amendment
1:2010. These safety standards limit the exposed length of the probe tip to 4
mm for measurement category III. These test leads include a cap that must
be in place when used in measurement category III applications.
Failure to observe this warning could result in severe injury or death.
CAT II 600VCAT III 600V
CAT III 600V
Cap can be removed for measurement category I or II applications.
Cap must be in place for
measurement category III
applications.
DM-25
9
Operation
Electric shock hazard:
Contact with live circuits could result in severe injury
or death.
1. Refer to the Settings Table. Set the selector to the proper setting. Start with
the highest measurement range.
2. Refer to “Typical Measurements” for specific measurement instructions.
3. Test the unit on a known functioning circuit or component.
•If the unit does not function as expected on a known functioning circuit,
replace the battery.
•If the unit still does not function as expected, call Greenlee for technical
assistance at 800-435-0786.
4. Take the reading from the circuit or component to be tested. If the resolu-
tion is not satisfactory, remove the meter from the circuit and change to
the next lower range.
Settings Table
To measure this value: Set the selector to this symbol:
Continuity*
Diode
Resistance Ω
Battery Batt.
Voltage (DC)
Voltage (AC)
* Tone indicates continuity. The threshold is between 30 Ω and 100 Ω.
10
Typical Measurements
AC Voltage
Measurement
Resistance
Measurement
600
2000k
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