Greenlee DM-45 Bedienungsanleitung

Read and understand all of the instructions and safety information in this manual

before operating or servicing this tool.

DM-45

Digital Multimeter

INSTRUCTION MANUAL

Description

The Greenlee DM-45 Digital Multimeter is a hand-held testing device with the following measurement

capabilities: AC and DC voltage, AC and DC current, temperature (K-type thermocouples only),

frequency, duty cycle, resistance, and capacitance. This meter also checks diodes and veriﬁes

continuity.

Other specialized capabilities and functions include:

•Backlighted LCD for reading in dim conditions.

•Relative zero mode.

•Data hold mode.

•Automatic power off.

Safety

Safety is essential in the use and maintenance of Greenlee tools and equipment. This instruction

manual and any markings on the tool provide information 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-45 Digital Multimeter.

Keep this manual available to all personnel.

Do not discard this product or throw away!

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.

KEEP THIS MANUAL

DM-45

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.

Electric shock hazard:

Contact with live circuits could result in severe injury or death.

Important Safety Information

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.

•Use test leads or accessories that are appropriate for the application. Refer to the category and

voltage rating of the test lead or accessory.

•Inspect the test leads or accessory before use. They must be clean and dry, and the insulation

must be in good condition. Destroy test leads and replace immediately 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:

•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 categories III and IV. These test leads

include a cap that must be in place when used in measurement category III or IV applications.

•Do not apply more than the rated voltage between any two input terminals, 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.

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.

DM-45

Important Safety Information

Electric shock hazard:

The fuses are an integral part of the overvoltage protection. When fuse replacement is necessary,

refer to “Speciﬁcations” for the correct type, size, and capacity. Using any other type of fuse will void

the overvoltage protection rating of the unit.

Failure to observe this warning could result in severe injury or death.

Electric shock hazard:

•Unless measuring voltage, current, or frequency, 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.

Incorrect settings or connections can result in a blown fuse.

•Using this unit near equipment that generates electromagnetic interference can result in unstable

or inaccurate readings.

Failure to observe these warnings could result in severe injury or death.

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.

Identiﬁcation

1. Display 4000-count LCD

2. Feature buttons Refer to explanations in the “Using the Features” section.

3. Selector Selects a function or turns power OFF.

4. 10A Positive input terminal for high current measurements.

5. COM Negative, common, or ground input terminal for all measurements.

6. INPUT Positive input terminal for all measurements except high current.

Display Icons

7. Low battery

8. 8.8.8.8 Numeric display

9. DC measurement is selected.

10. AC measurement is selected.

11. –Polarity indicator

12. Hold function is enabled.

13. REL Relative zero function is enabled.

14. AUTO Automatic ranging is enabled.

15. Diode

16. Continuity

17. %Duty cycle function is enabled.

18. kKilo (103)

19. MMega (106)

20. ΩOhm

21. Hz Hertz (frequency in cycles per second)

22. nNano (10-9)

23. mMilli (10-3)

24. µMicro (10-6)

25. FFarad

26. AAmpere

27. VVolt

28. °C °F Celsius or

Fahrenheit indicator

Symbols on the Unit

Warning—Read the instruction manual

Risk of electric shock

Battery

Fuse

Double insulation

4 5 6

78 28

16 17 18–21 22–27

DM-45

Using the Features

•RANGE: Press once to enter the manual ranging mode. “AUTO” will disappear from the display.

Press repeatedly to step through the ranges. Press and hold to return to the automatic ranging mode.

•Hz %: Press momentarily to toggle between frequency and duty cycle functions. This button is active

only when the selector is set to Hz/%.

•REL: Finds the difference between two measurements. While taking a measurement, press REL to

set the display to zero. “REL” will appear on the display. Take the second measurement. The value on

the display will be the difference between the two measurements. Press again to exit this mode.

•HOLD: Press momentarily to hold the present value on the display. Press again to exit this mode.

• :Press and hold until backlight illuminates. Press and hold again to turn off.

• :Press momentarily to toggle between functions.

•Automatic Power Off: To extend battery life, the meter will shut itself off after approximately

15minutes of inactivity. To restore power, press any button or turn the selector to OFF and then back

on. To disable this feature, press any button while turning the meter on.

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 categories III and IV. These test leads include a cap

that must be in place when used in measurement category III or IV applications.

Failure to observe this warning could result in severe injury or death.

CAT IV 600V

CAT III 1000V

CAT II 1000V

CAT IV 600V

CAT III 1000V

Cap can be removed for measurement category I or II applications.

Cap must be in place for

measurement category III

or IV applications.

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, press (when instructed to

doso), and connect the test leads to the meter.

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 and/

or fuses.

4. Take the reading from the circuit or component to be tested.

DM-45

Settings Table

To measure this

characteristic …

Set the

selector to this

symbol…

These icons will

appear on the

display …

Connect

the red

lead to…

Connect

the black

lead to …

DC Voltage (600 V max) Vand VINPUT COM

AC Voltage (600 V max) Vand VINPUT COM

Resistance Ω MΩ INPUT COM

Continuity* /

and press

and ΩINPUT COM

Diode and V

Capacitance** AUTO and nF INPUT COM

Frequency Hz/% and

press Hz %

AUTO and Hz INPUT COM

Duty Cycle %

Temperature Temp

°C or °F

(press to

change scale)

INPUT COM

Current (4000 µA max)† µA AUTO

µA, or INPUT COM

Current (400 mA max)† mA AUTO

mA, or INPUT COM

Current (10 A max)† AAUTO

A, or 10A COM

* Tone indicates continuity. The threshold is between 20 Ω and 150 Ω.

** Discharge capacitor before measurement. Discharge a large capacitor through an appropriate

resistive load.

† Press for AC or DC, as required.

Operation (cont’d)

Typical Measurements

Current Measurement

AC Voltage Measurement DC Voltage Measurement

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