Greenlee DM-300, DM-310, DM-330, DM-350 Instruction Manual

INSTRUCTION MANUAL

MANUAL DE INSTRUCCIONES

MANUEL D’INSTRUCTIONS

DM-300 • DM-310 DM-330 • DM-350

Digital

Multimeters

Multímetros

digitales

Multimètres

numériques

Read and understand all of the instructions and safety information in this manual before operating or servicing this tool.

Lea y entienda todas las instrucciones y la información sobre seguridad que aparecen en este manual, antes de manejar esta herramienta o darle mantenimiento.

Lire attentivement et bien comprendre toutes les instructions et les informations sur la sécurité de ce manuel avant d‘utiliser ou de procéder à l‘entretien de cet outil.

Description

The Greenlee DM-300, DM-310, DM-330, and DM-350 Digital Multimeters are hand-held testing devices with the following measurement capabilities: AC and DC voltage, frequency, and resistance. They also check diodes and verify continuity. These meters have non-contact and single-probe voltage detection capability.

The DM-310, DM-330, and DM-350 multimeters have the following additional measurement capabilities: AC and DC current, and capacitance. They warn the user with a beep and error message on the LCD if the test lead is plugged into the A input terminal while the selector switch is not in the A position.

The DM-350 multimeter has additional low-current ranges for AC and DC current measurement as well as a backlit display.

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-300, DM-310, DM-330, and DM-350 Digital Multimeters.

Keep this manual available to all personnel. Replacement manuals are available upon request at no charge.

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-300 • DM-310 • DM-330 • DM-350

Important Safety Information

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

Electric shock hazard: Contact with live circuits could result in severe

injury or death.

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. See 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.

• 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 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.

DM-300 • DM-310 • DM-330 • DM-350

Important Safety Information

Electric shock hazard:

• Do not operate with the case or battery compartment open.

• Before opening the case or battery compartment, 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: The fuse is 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.

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.

DM-300 • DM-310 • DM-330 • DM-350

Identification

1. LCD display

2. Feature buttons

3. Selector

4. Positive input terminal for high current measurements

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

6. Positive input terminal for all measurements (6.000 A and 10.00 A ranges)

except

high current

5 6 4 5

DM-310 • DM-330 • DM-350DM-300

Identification (cont’d)

Display Icons

7. Automatic ranging is enabled.

8. Hold function is enabled.

9. DC measurement is selected.

10. AC measurement is selected.

11. – Polarity indicator

12. MAX MAX MIN mode is selected.

MIN

13.

O.L

Overload indicator

14. µ Micro (10-6)

15. F Farads

16. n Nano (10-9)

17. Low battery indicator

18. Diode

19. Continuity

20. M Mega (106)

21. k Kilo (103)

22. Ω Ohms

23. m Milli (10-3)

23. V Volts

24. Hz Hertz (frequency in cycles per second)

Note: Unidentified icons are not used on these models.

7 8

9–10

11 12

Symbols on the Unit

Warning—Read the instruction manual Double insulation

14–16 17–19

20–22

23–25

DM-300 • DM-310 • DM-330 • DM-350

Using the Features

• Automatic Power Off To extend battery life, the meter will shut itself off

after approximately 30 minutes of inactivity. To restore power, press any button. To disable this feature, press SELECT while turning the meter on.

• MAX MIN Press and hold to begin recording the input. “MAX MIN” will

appear on the display. The meter will beep whenever the minimum or maximum is updated. When using the MAX MIN function, press momentarily to cycle through the maximum, minimum, difference (MAX – MIN). Press and hold to exit this mode.

The Automatic Power Off feature should be disabled for extended use of MAX MIN recording.

•EFPress momentarily to detect the electric field that surrounds current-

carrying conductors. Signal strength is displayed as a series of dashes on the display.

– Use the tester’s built-in antenna (located along the top, near the

LCD) for tracing live circuits or locating a break in a wire.

– For more precision, such as distinguishing between current-

carrying and ground wires, connect a test lead to the + input terminal and use it as a probe.

• (DM-350 only) Press and hold until LCD illuminates. The lamp

turns off after 90 seconds to extend battery life.

• SELECT Press momentarily to toggle between functions, or to toggle

between AC and DC when measuring current.

• RANGE Press once to enter the manual ranging mode. The icon

will disappear from the display. Press repeatedly to step through the ranges. Press and hold to return to the automatic ranging mode.

When using MAX MIN or HOLD, pressing exit that mode.

• HOLD Press momentarily to hold the present value on the display.

Press again to exit this mode.

RANGE

will cause the meter to

AC Measurement

AC measurements are usually displayed as RMS (root mean squared) values. Two methods of AC measurement are

calibrated

The average-responding RMS calibrated method takes the average value of the input signal, multiplies it by 1.11, and displays the result. This method is accurate if the input signal is a pure sine wave. The Greenlee DM-310 is an average-responding meter.

The true RMS-reading method uses internal circuitry to read the true RMS value. This method is accurate, within the specified crest factor limitations, whether the input signal is a pure sine wave, a square wave, sawtooth wave, half wave or signal with harmonics. The ability to read true RMS provides much more measurement versatility. The Greenlee DM-300, DM-330, and DM-350 are true RMS meters.

The Waveforms and Crest Factors table shows some typical AC signals and their RMS values.

and

true RMS-reading.

Waveforms and Crest Factors

Waveform

RMS Value 100 100 100 100

Rectified Value 90 100 87 64 Crest Factor*

(ξ)

*The crest factor is the ratio of the peak value to the RMS value; it is

represented by the Greek letter ξ.

1.414 1 1.73 2

average-responding RMS

DM-300 • DM-310 • DM-330 • DM-350

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 SELECT (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 fuse.

• If the unit still does not function as expected, send the unit to Greenlee for repair. Refer to the instructions under the Warranty.

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

Operation (cont’d)

Settings Table

To measure

this value:

All Models

Voltage

(1000 V max)

Frequency

of a voltage

signal

Set the

selector

to this symbol:

and press

SELECT

This icon

will appear

on the display:

and

Connect

the red lead to:

Connect

the black

lead to:

COM

COMResistance

Continuity*

DM-310, DM-330, and DM-350 Only

Capacitance**

Current

(10 A max)†

Frequency

of a current

(10 A max)

DM-350 Only

Current

(2000 µA max)†

Frequency

of a current

(2000 µA max)

and press

SELECT

and press

SELECT

2 times

and press

SELECT

3 times

and press

SELECT

2 times

and press

SELECT

2 times

andDiode

and A

(µA on DM-350)

and µA

COM

*Tone indicates continuity. The threshold is between 10 Ω and 150 Ω.

**Discharge capacitor before measurement. Discharge a large capacitor

through an appropriate resistive load.

†Default measurement is AC. Press SELECT to measure DC current.

Typical Measurements

Voltage Measurement

DM-300 • DM-310 • DM-330 • DM-350

DM-310 DM-330 DM-350

DM-300

Typical Measurements

Electric Field Detection

DM-300

DM-310 DM-330 DM-350

A–Non-contact

B–Contact

Typical Measurements

Resistance Measurement

DM-300

DM-300 • DM-310 • DM-330 • DM-350

DM-310 DM-330 DM-350

Typical Measurements

Continuity Check

DM-300

DM-310 DM-330 DM-350

Typical Measurements

Diode Measurement

Reverse Bias

Forward Bias

DM-300

DM-300 • DM-310 • DM-330 • DM-350

DM-310 DM-330 DM-350

Reverse Bias

Forward Bias

Typical Measurements

Current Measurement— DM-310, DM-330, and DM-350 Only

Capacitance Measurement— DM-310, DM-330, and DM-350 Only

DM-300 • DM-310 • DM-330 • DM-350

Accuracy

Refer to “Specifications” for operating conditions and temperature coefficient.

Accuracy is specified as follows: ± (a percentage of the reading + a fixed amount) at 23 °C ± 5 °C (73.4 °F ± 9 °F), 0% to 75% relative humidity.

True RMS readings: DM-300, DM-330, and DM-350 AC accuracies are specified from 5% (10% for 600.0 mV range) to 100% of the range unless otherwise specified. Frequency must be within the specified bandwidth for non-sinusoidal waveforms. Crest factors are as follows:

• Crest factor < 2:1 at full scale

• Crest factor < 4:1 at half scale

DC Voltage

Range Accuracy

600.0 mV 0.7% + 0.2 mV

6.000 V 0.5% + 0.003 V

60.00 V 0.5% + 0.03 V

600.0 V 0.7% + 0.2 V 1000 V 1.2% + 6 V

Input Impedance: 1000 MΩ

nominal for 600.0 mV range; 10 MΩ nominal for all other ranges

Ohms

Range Accuracy

600.0 Ω 0.8% + 0.4 Ω

6.000 kΩ 0.7% + 0.002 kΩ

60.00 kΩ 0.7% + 0.02 kΩ

600.0 kΩ 0.7% + 0.2 kΩ

6.000 MΩ 0.9% + 0.004 MΩ

60.00 MΩ 2.0% + 0.04 MΩ

AC Voltage

Accuracy at

Range 50 Hz to 500 Hz

600.0 mV 1.2% + 0.3 mV

6.000 V 1.0% + 0.003 V

60.00 V 1.0% + 0.03 V

600.0 V 1.0% + 0.3 V 1000 V 2.5% + 6 V

Input Impedance: 10 MΩ || 90 pF

nominal

600 Ω with Continuity Beeper

Range Accuracy

600.0 Ω 0.8% + 0.4 Ω

Continuity Beeper Response:

< 100 µs

Open Circuit Voltage:

0.4 VDC typical

Audible Threshold:

Between 10 Ω and 150 Ω

Diode Tester

Open Circuit

Test Current Voltage Accuracy

0.4 mA typical < 1.6 VDC typical 1.9% + 0.003 V

Accuracy (cont’d)

Non-contact EF Detection

Typical Voltage Bar Graph Indication

20 V to 60 V – 40 V to 80 V – – 60 V to 110 V – – – 80 V to 150 V – – – – above 120 V – – – – –

Indication: Bar graph segments and audible beep tones proportional to the

field strength Detection Frequency: 50/60 Hz Detection Antenna: Top end of the meter

Frequency

Function (Sine RMS) AC Functions DC Functions All Models

600.0 mV 400 mV 40 Hz to 500 Hz 40 Hz to 500 Hz

6.000 V 4 V 40 Hz to 60 kHz 40 Hz to 30 kHz

60.00 V 6.0 V 40 Hz to 60 kHz 40 Hz to 30 kHz

600.0 V 60 V 40 Hz to 60 kHz 40 Hz to 30 kHz 1000 V 600 V 40 Hz to 100 Hz 40 Hz to 100 Hz

DM-310, DM-330, and DM-350 Only

6.000 A 5 A 40 Hz to 6 kHz 40 Hz to 6 kHz

10.00 A 5 A 40 Hz to 6 kHz 40 Hz to 6 kHz

DM-350 Only

600.0 µA 300 µA 40 Hz to 10 kHz 40 Hz to 10 kHz 2000 µA 300 µA 40 Hz to 10 kHz 40 Hz to 10 kHz

Sensitivity Range— Range—

Accuracy of Frequency Ranges

Display Range Accuracy

9.999 Hz Not specified

99.99 Hz ± (0.05% + 0.01 Hz)

999.9 Hz ± (0.05% + 0.1 Hz)

9.999 kHz ± (0.05% + 0.001 kHz)

99.99 kHz ± (0.05% + 0.01 kHz)

DM-300 • DM-310 • DM-330 • DM-350

Accuracy (cont’d)

Capacitance—DM-310, DM-330, and DM-350 Only

Range Accuracy

600.0 nF* 1.9% + 0.2 nF

6.000 µF 1.6% + 0.004 µF

60.00 µF 1.6% + 0.04 µF

600.0 µF 1.6% + 0.4 µF

2000 µF 1.6% + 4 µF

*Accuracy below 60 nF is not specified.

Notes: Accuracies are for film capacitors (capacitors with negligible dielectric absorption). Measurements of larger capacitors can take up to 60 seconds. The first reading may be from an incomplete measurement cycle and should be ignored.

DC Current

Range Accuracy Burden Voltage

DM-310, DM-330, and DM-350 Only

6.000 A 0.9% + 0.003 A 6.9 mV/A

10.00 A* 0.9% + 0.03 A 6.9 mV/A

DM-350 Only

600.0 µA 1.2% + 0.3 µA 1.7 mV/µA

2000 µA 1.2% + 3 µA 1.7 mV/µA

*8 A continuous

10 A for 5 minutes max. with 10 minutes cool down interval

AC Current

Accuracy at

Range 50 to 500 Hz Burden Voltage

DM-310, DM-330, and DM-350 Only

6.000 A 1.2% + 0.003 A 3.3 mV/A

10.00 A* 1.4% + 0.03 A 3.3 mV/A

DM-350 Only

600.0 µA 1.2% + 0.3 µA 0.15 mV/µA

2000 µA 1.2% + 3 µA 0.15 mV/µA

*8 A continuous

10 A for 5 minutes max. with 10 minutes cool down interval

Specifications

Display: 6000-count LCD (9999-count in frequency mode) Polarity: Automatic Sampling Rate: 5 per second Temperature Coefficient: Nominal 0.15 x (specified accuracy) per °C

below 18 °C or above 28 °C Automatic Power-Off: After 30 minutes of inactivity.

To disable this feature, press SELECT while turning the meter on. Noise Rejection*:

Normal Mode Rejection Ratio > 30 dB at 50 Hz and 60 Hz when

measuring DCV

Common Mode Rejection Ratio > 60 dB from 0 Hz to 60 Hz when

measuring ACV

Common Mode Rejection Ratio > 90 dB at 0 Hz, 50 Hz and 60 Hz when

measuring DCV

Operating Conditions:

–10 °C to 31 °C (14 °F to 88 °F), 0% to 80% relative humidity (non-

condensing)

31 °C to 50 °C (88 °F to 122 °F), relative humidity decreasing linearly

from 80% to 50% Altitude: 2000 m (6500') maximum Indoor use only

Storage Conditions: –20 °C to 60 °C (–4 °F to 140 °F)

0% to 80% relative humidity (non-condensing) Remove battery.

Pollution Degree: 2 Battery: 9-Volt (NEDA 1604, JIS 006P or IEC 6F22) Overload Protections:

Measurement Categories:

Terminal: 1050 V RMS for voltage functions; 600 VDC/V RMS

for all other functions A Terminal: 15 A/600 V fuse, interrupting rating 100 kA, 13/32" x 1-1/2"

Terminal: Category III, 1000 Volts ac and dc, and Category IV,

600 Volts ac and dc A Terminal: Category IV, 600 Volts ac and 500 Volts dc

*Noise rejection is the ability to reject unwanted signals, or noise.

•

Normal mode voltages

measurements. NMRR (Normal Mode Rejection Ratio) is a measure of the ability to filter out these signals.

•

Common mode voltages

terminals, with respect to ground, that can cause digit rattle or offset in voltage measurements. CMRR (Common Mode Rejection Ratio) is a measure of the ability to filter out these signals.

are AC signals that can cause inaccurate DC

are signals present at the COM and + input

DM-300 • DM-310 • DM-330 • DM-350

Measurement Categories

These definitions were derived from the international safety standard for insulation coordination as it applies to measurement, control, and laboratory equipment. These measurement categories are explained in more detail by the International Electrotechnical Commission; refer to either of their publications: IEC 61010-1 or IEC 60664.

Measurement Category I

Signal level. Electronic and telecommunication equipment, or parts thereof. Some examples include transient-protected electronic circuits inside photocopiers and modems.

Measurement Category II

Local level. Appliances, portable equipment, and the circuits they are plugged into. Some examples include light fixtures, televisions, and long branch circuits.

Measurement Category III

Distribution level. Permanently installed machines and the circuits they are hard-wired to. Some examples include conveyor systems and the main circuit breaker panels of a building’s electrical system.

Measurement Category IV

Primary supply level. Overhead lines and other cable systems. Some examples include cables, meters, transformers, and other exterior equipment owned by the power utility.

Statement of Conformity

Greenlee Textron Inc. is certified in accordance with ISO 9000 (2000) for our Quality Management Systems.

The instrument enclosed has been checked and/or calibrated using equipment that is traceable to the National Institute for Standards and Technology (NIST).

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