GREENLEE DM-100, DM-110 User Manual

INSTRUCTION MANUAL

MANUAL DE INSTRUCCIONES

MANUEL D’INSTRUCTIONS

DM-100 • DM-110

DIGITAL

MULTIMETERS

MULTÍMETROS

DIGITALES

MULTIMETRES

NUMERIQUES

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 estas herramientas o darles 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.

999 3788.3

© 2000 Greenlee Textron

IM 1463 REV 1 12/00

Description

The Greenlee DM-100 and DM-110 Digital Multimeters are hand-held testing devices with the following measurement capabilities: AC and DC voltage, AC and DC current, and resistance. They also check diodes and verify continuity. In addition, the DM-110 measures frequency and capacitance. The DM-110 is a true RMS reading meter.

Both models feature automatic power off to conserve the batteries and a bar graph display which is more sensitive than the numeric display—useful for detecting faulty contacts, potentiometer clicks, and signal spikes.

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

This instruction manual is intended to familiarize all personnel with the safe operation and maintenance procedures for Greenlee DM-100 and DM-110 Digital Multimeters.

Keep this manual available to all personnel.

Replacement manuals are available upon request at no charge.

Greenlee andare registered trademarks of Greenlee Textron.

KEEP THIS MANUAL

2

DM-100 • DM-110

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 can result in an accident causing serious injury or death.

3

Important Safety Information

Electric shock hazard:

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

•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 can result in severe injury or death.

4

DM-100 • DM-110

Important Safety Information

The fuse is an integral part of the overvoltage protection. When fuse replacement is necessary, see 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 can result in severe injury or death.

Do not change the measurement function while the test leads are connected to a component or circuit.

Failure to observe this precaution can result in injury and can damage the unit.

•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. See Specifications.

Failure to observe these precautions can result in injury and can damage the unit.

•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.

5

Identification

1.	Display	4-digit LCD and bar graph
2.	Function Buttons	See explanations under Using the Features
3.	Selector	Selects a function or turns power OFF
4.	Hz	Positive input terminal for all measurements except 10 A current
	VΩµ A	(	Hz on DM-110 only)
5.	COM	Negative, common or ground input terminal for all measurements
6.	10A	Positive input terminal for current measurements up to 10 A

1

2

3

5

4

6

Symbols on the Unit

Warning—Read the instruction manual

Battery

Fuse

Double insulation

6

DM-100 • DM-110

Display Icons

Both Models

DM-100 Only

7.

Manual range is selected

22.

Hold function is enabled

8.

DC measurement is selected

DM-110 Only

9.

AC measurement is selected

23.

Hold function is enabled

10.

Low battery

24.

n

nano (10-9)

11.

APO

Auto Power Off is enabled

25.

µ

Micro (10-6)

12.

Diode

26.

m

Milli (10-3)

13.

Continuity is selected

27.

F

Farads

14.

µ

Micro (10-6)

Note: Unidentified icons are not used

15.

m

Milli (10-3)

on these models.

16.

V

Volts

17.

A

Amps

18.

M

Mega (106)

DM-110 display

19.

k

Kilo (103)

23

11

12

Ω

7

20.

Ohms

21.

Hz

Hertz (frequency

or cycles per

second)

13

14,15,16,17

24,25,26,27

18,19,20,21

	10	8	9
DM-100 display
22	11	12	13
7
8			14,15,16,17
9
10			18,19,20,21

7

AC Measurement

AC measurements are usually displayed as RMS (root-mean-square) values. Two AC measurement methods are average-responding RMS calibrated and true RMS-reading.

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-100 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, triangle wave, half wave or signal with harmonics. The ability to read true RMS provides much more measurement versatility. The Greenlee DM-110 is a true RMS meter.

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

Waveforms and Crest Factors

Waveform
RMS Value		100		100				100		100
Average Value		90		100				87		64
Crest Factor*		1.414		1				1.73		2
(ξ )

*The crest factor is the ratio of the peak value to the RMS value; it is represented by the Greek letter ξ .

8

DM-100 • DM-110

Using the Features

Button	Press momentarily to:		Notes:
Blue	•	select AC or DC when
(no label)		measuring current or voltage
	•	select secondary functions
RANGE	•	change from autoranging	Press and hold to change from
		to manual ranging	manual ranging to autoranging.
	•	select ranges when using
		the manual ranging mode
	•	select trigger levels when
		measuring frequency
PWR RST	turn power back on after auto
(DM-100 only)	power off
Hz	view the frequency while		While in the Hz mode, the RANGE
(DM-110 only)	measuring AC voltage or		button does not change the
	current		frequency range. However, it changes
			the voltage range.
HOLD	hold a measured value for all		Conversions are made but the display
	functions. Press again to		does not update.
	return to normal mode

9

Operation

1.See the Settings Table. Set the selector to the proper setting, press the unlabeled blue button to select the desired measurement, and connect the test leads to the meter. Start with the highest measurement setting.

2.See 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. See the address shown under Warranty.

4.Take the reading from the circuit or component to be tested. If the resolution is not satisfactory, remove the meter from the circuit and change to the next lower range if using manual ranging.

10

DM-100 • DM-110

Operation (cont’d)

Settings Table

set the selector

this icon will

connect

and connect

To measure this …

appear on

the red

the black

to this symbol …

the display …

lead to …

lead to …

Capacitance*

F

Hz

COM

(DM-110 only)

VΩµ

A

Ω

VΩµ

Continuity**

and press the BLUE

A

COM

button one time

µ A

µ A

VΩµ

Current (AC)†

and press the BLUE

A

COM

button one time

Current (DC)†

µ A

VΩµ

A

COM

µ A

Current (AC)

10A

(10 A max)

and press the BLUE

10 A

COM

button one time

A

Current (DC)

10A

10 A

COM

(10 A max)

A

Ω

VΩµ

Diode***

and press the BLUE

V

A

COM

button two times

Frequency

Hz

kHz or MHz

Hz

COM

(DM-110 only)

VΩµ

A

Resistance

Ω

MΩ or kΩ

VΩµ

A

COM

V

VΩµ

Voltage (AC)

and press the BLUE

mV or V

A

COM

button one time

Voltage (DC)

V

VΩµ

A

COM

mV or V

*Discharge capacitor before measurement.

**Tone sounds if the measured resistance is less than approximately 30 Ω .

***Diode voltage is shown if conducting, or “OL” is displayed for non-conductance.

†3200 µ A max for DM-100, 4000 µ A max for DM-110.

11

Operation (cont’d)

Auto Power Off

The meter defaults to automatically turn itself off after a period of inactivity from the user. on the display indicates that the feature is enabled. The meter beeps approximately 15 seconds prior to turning off. The DM-100 turns off after 10 minutes, and the DM-110 turns off after 30 minutes. The present reading is held in memory. To turn the meter back on, press any button or turn the selector. The last reading will be displayed in the Hold mode. Press HOLD to return to normal operation.

Disabling Auto Power Off

To disable the Auto Power Off feature, press and hold the RANGE button while turning the meter on.

Note: When the meter is turned off and back on with the selector, the meter returns to the default. However, the last value is not held in memory.

12

DM-100 • DM-110

Typical Measurements

Voltage Measurement

Current Measurement

13

Typical Measurements (cont’d)

Resistance Measurement

Continuity Check

14

DM-100 • DM-110

Typical Measurements (cont’d)

Capacitance Measurement

Diode Measurement

Reverse Bias

Forward Bias

15

Accuracy: DM-100

See the Specifications section 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 80% relative humidity.

For the DM-100, AC accuracy is specified for sine waves only.

AC Current

Range*		Accuracy	Burden Voltage
320.0 µ A	±	(2.2% + 0.5 µ A)	1 V max
3200 µ A	±	(2.2% + 5 µ A)	10 V max
10.00 A	±	(2.5% + 0.05 A)	2 V max

AC Voltage

Range*		Accuracy	Frequency Range	Input Impedance
3.200 V	±	(1.50% + 0.005 V)
32.00 V	±	(1.50% + 0.05 V)	40 to 500 Hz	10 MΩ , 100 pF
320.0 V	±	(1.50% + 0.5 V)
750 V		± (1.50% + 5 V)		inal

DC Current

Range*		Accuracy	Burden Voltage
320.0 µ A	±	(1.7% + 0.2 µ A)	1 V max
3200 µ A	±	(1.7% + 2 µ A)	10 V max
10.00 A	±	(2% + 0.02 A)	2 V max

*In autorange mode, ranges change at approximately 3200 counts. In manual range mode, range extends to 3400 counts.

16

DM-100 • DM-110

Accuracy: DM-100 (cont’d)

DC Voltage

Range*		Accuracy	Input Impedance
320.0 mV	±	(0.5% + 0.2 mV)	over 1000 MΩ
3.200 V	±	(0.5% + 0.002 V)
32.00 V	±	(0.5% + 0.02 V)	10 MΩ
320.0 V	±	(0.5% + 0.2 V)
1000 V		± (0.5% + 2 V)

Resistance

Range*		Accuracy
320.0 Ω		± (1% + 0.4 Ω )
3.200 kΩ	±	(0.75% + 0.003 kΩ )
32.00 kΩ	±	(0.75% + 0.03 kΩ	)
320.0 kΩ	±	(0.75% + 0.3 kΩ	)
3.200 MΩ	±	(1% + 0.003 MΩ	)
32.00 MΩ	±	(2% + 0.05 MΩ	)

Typical open circuit voltage: 1.5V

*In autorange mode, ranges change at approximately 3200 counts. In manual range mode, range extends to 3400 counts.

Diode Test

Test Current (Typical): 1.5 mA

Open Circuit Voltage: Less than 3.1 VDC

Continuity

Threshold: Tone sounds if the measured resistance is less than approximately 30 Ω .

Response Time: Approximately 100 ms

17

Accuracy: DM-110

See the Specifications section 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 80% relative humidity.

For the DM-110, AC accuracy specification applies for sine waves at full scale and non-sine waves below half scale.

•For crest factors from 1.4 to 3, add 1.5% to accuracy.

•For crest factors from 3 to 4, add 3% to accuracy.

AC Current

Range			Accuracy	Burden Voltage
400.0 µ A		±	(2.2% + 0.5 µ A)	1 V max
4000	µ A	±	(2.2% + 5 µ A)	10 V max
10.00	A *	±	(2.5% + 0.05 A)	2 V max

* 10 A continuous; 20 A maximum (Duty Cycle: 30 seconds on, 5 minutes off)

AC Voltage

Range		Accuracy	Frequency Range	Input Impedance
400.0 mV		unspecified
4.000 V	±	(1.5% + 0.005 V)
40.00 V	±	(1.3% + 0.05 V)	40 to 500 Hz	10 MΩ , 100 pF
400.0 V	±	(1.3% + 0.5 V)
750 V		± (1.3% + 5 V)

DC Current

Range		Accuracy	Burden Voltage
400.0 µ A	±	(1.7% + 0.2 µ A)	1 V max
4000 µ A	±	(1.7% + 2 µ A)	10 V max
10.00 A	±	(2% + 0.02 A)	2 V max

18

DM-100 • DM-110

Accuracy: DM-110 (cont’d)

DC Voltage

Range			Accuracy	Input Impedance
400.0 mV	±	(0.5% + 0.2 mV)		over 1000	MΩ
4.000 V	±	(0.5% + 0.002 V)
40.00 V	±	(0.5% + 0.02 V)		10 MΩ
400.0 V		±	(0.5% + 0.2 V)
1000 V		±	(0.5% + 2 V)

Resistance

Range		Accuracy
400.0 Ω	±	(1.0% + 0.3 Ω )
4.000 kΩ	±	(0.75% + 0.002 kΩ	)
40.00 kΩ	±	(0.75% + 0.02 kΩ	)
400.0 kΩ	±	(0.75% + 0.2 kΩ	)
4.000 MΩ	±	(1.0% + 0.003 MΩ	)
40.00 MΩ	±	(1.5% + 0.05 MΩ	)
Typical open circuit voltage: 1.3V

Capacitance

Range		Accuracy
4.000 nF	±	(3.0% + 0.010 nF)
40.00 nF	±	(3.0% + 0.10 nF)
400.0 nF	±	(2.0% + 0.8 nF)
4.000 µ F	±	(2.0% + 0.008 µ F)
40.00 µ F	±	(2.0% + 0.08 µ F)
400.0 µ F	±	(2.0% + 0.8 µ F)
4.000 mF*	± (5.0% + 0.020 mF)
40.00 mF*	±	(5.0% + 0.20 mF)

Accuracies are for film capacitors (capacitors with negligible dielectric absorption)

*Accuracy specified for values less than 1/2 full scale. May have ripple within accuracy spec limits.

19

Accuracy: DM-110 (cont’d)

Frequency

Range		Accuracy	Sensitivity
4.000 kHz	±	(0.01% + 0.001 kHz)
40.00 kHz	±	(0.01% + 0.01 kHz)	100 mV rms *
400.0 kHz		± (0.01% + 0.1 kHz)
4.000 MHz	±	(0.01% + 0.001 MHz)	250 mV rms
40.00 MHz	±	(0.01% + 0.01 MHz)	1 V rms

*Sensitivity is 1.5 V rms below 20 Hz

The frequency measuring function has four selectable trigger levels. Use the range button to select.

Diode Test

Test Current (Typical): 1.5 mA

Open Circuit Voltage: Less than 3.1 VDC

Continuity

Threshold: Tone sounds if the measured resistance is less than approximately 30 Ω . Response Time: Approximately 100 ms

20

DM-100 • DM-110

Specifications

Display:

DM-100: LCD (3200) and 70-segment bar graph

In autorange mode, ranges change at approximately 3200 counts. In manual range mode, range extends to 3400 counts.

DM-110: LCD (4000) and 82-segment bar graph

Polarity: Automatic

Sampling Rate:

Numeric Display: 2 per second Bar Graph Display: 12 per second

Temperature Coefficient: 0.15 x (Accuracy) per ° C below 18 ° C or above 28 ° C

Automatic Power-Off:

DM-100: After 10 minutes of inactivity

DM-110: After 30 minutes of inactivity

Overload Protections:

Volts: See Overvoltage Protection Categories

Amps: A: 16A/500V HBC F Fuse, Interrupting Rating 10 kA, 1/4 x 1-1/4" Other Functions: 600 VDC/VAC RMS

Overvoltage Protection Categories: VΩµ A Terminal: Category III, 600 VAC and 600 VDC

Category II, 1000 VAC and 1000 VDC

Operating Conditions:

0 ° C to 30 ° C (32 ° F to 86 ° F), 0% to 80% Relative Humidity 30 ° C to 40 ° C (86 ° F to 104 ° F), 0% to 75% Relative Humidity

40 ° C to 50 ° C (104 ° F to 122 ° F), 0% to 45% Relative Humidity Indoor use only.

Storage Conditions:

-20 ° C to 60 ° C (-4 ° F to 140 ° F), 0% to 80% Relative Humidity Remove batteries

Elevation: 2000 m (6500') maximum

Pollution Degree: 2

Battery:

DM-100: Two AAA 1.5-Volt batteries (NEDA 24A or IEC LR03)

DM-110: One 9-Volt battery (NEDA 1604 or IEC 6F22)

Battery Life:

DM-100: Approximately 500 hours with alkaline

DM-110: Approximately 300 hours with alkaline

21

Overvoltage Installation Categories

These definitions were derived from the international safety standard for insulation coordination as it applies to measurement, control, and laboratory equipment. These overvoltage categories are explained in more detail by the International Electrotechnical Commission; refer to either of their publications: IEC 1010-1 or IEC 60664.

Overvoltage Category I

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

Overvoltage Category II

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

Overvoltage 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.

Overvoltage 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.

22