GREENLINE DM-830A Manuale utente

INSTRUCTION MANUAL

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

manual before operating or servicing this tool.

Register this product at www.greenlee.com

DM-810A • DM-820A

DM-830A • DML-430A

Digital Multimeters

English ....................1–28

Français ................29–56

Italiano ..................57–84

Deutsch ................85–112

Español...............113–140

Português ...........141–168

Nederlands .........169–196

2

Description

The Greenlee DM-810A, DM-820A, DM-830A, and DML-430A Digital Multimeters are hand-held

testing devices with the following measurement capabilities: AC and DC voltage, AC and DC current,

frequency, resistance, capacitance, and duty cycle of logic level signals. They also check diodes and

verify continuity. All meters feature true RMS AC measurements, a relative zero mode, data hold mode,

and an intelligent automatic power off. An optional optically isolated computer interface with software

facilitates the recording of readings from the meter to a computer.

Other specialized capabilities and functions common to all meters include:

• Dual display shows two measurements, such as AC voltage and frequency, at the same time.

• Backlighted LCD for reading in dim conditions.

• Beep-Jack™ audible warning alerts the user with a beep and an error message on the LCD if the

test lead is plugged into the mA/µA or A input terminal while the selector switch is not in the mA/µA

or A position.

• Bar graph display, which responds more quickly than the numeric display — useful for detecting

faulty contacts, potentiometer clicks, and signal spikes.

The DM-820A, DM-830A, and DML-430A multimeters have the following additional capabilities:

temperature (K-type thermocouples only); conductance; a crest function, which captures voltage or

current signal peaks; and a recording function, which stores the maximum, minimum, and difference

(maximum-minimum) input readings. The DM-820A and DM-830A record function can also calculate

the average reading. These two models also have non-contact and single-probe voltage detection.

The DM-830A and the DML-430A multimeters have an AutoCheck™ function for automatic selection

of AC voltage, DC voltage, and resistance with low input impedance to mask “ghost” voltages. Both

multimeters feature a T1-T2 function, which can measure and display two temperatures and calculate

the difference. They also feature AC + DC true RMS measurement capability. The DM-830A has a dBm

function with selectable reference impedances. The DML-430A has the capability to store data.

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-810A, DM-820A, DM-830A, and DML-430A Digital Multimeters.

Keep this manual available to all personnel. Replacement manuals are available 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.

DM-810A • DM-820A • DM-830A • DML-430A

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.

Electric shock hazard:

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

Important Safety Information

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 Textron Innovations Inc.

AutoCheck and Beep-Jack are trademarks of BTC.

Microsoft and Windows are registered trademarks of Microsoft Corporation.

KEEP THIS MANUAL

4

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.

• Only use the test leads provided with the equipment or UL Listed Probe Assembly with same rating

or better.

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

must be in good condition. Do not use the test lead 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 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.

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.

DM-810A • DM-820A • DM-830A • DML-430A

5

Important Safety Information

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 use the tester to measure voltages in circuits that could be damaged or activated by the

AutoCheck™ mode’s low input impedance (approximately 3.0 kΩ and 150 pF).

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.

6

Identiﬁcation

1. Display LCD and bar graph

2. Feature Buttons Refer to explanations under “Using the Features”

3. Selector Selects a function or turns power OFF

4. A Positive input terminal for high current measurements

5. mA µA Positive input terminal for low current measurements

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

7. ΩV Positive input terminal for all measurements except current and

temperature measurement T2

5

3

2

1

4

6

7

Symbols on the Unit

Warning—Read the instruction manual

Double insulation

DM-810A • DM-820A • DM-830A • DML-430A

7

Primary Display

8.

Bar graph element

9. – Polarity indicator for bar graph

10. Bar graph scale

11. LoZ AutoCheck™ mode; low input

impedance is active.

12. ∆ Relative zero function is enabled.

13. – Polarity indicator

14. 8.8.8.8 Numeric display

15. T1-T2 T1, T2, or T1-T2 function is enabled.

16. AC measurement is selected.

17. DC measurement is selected.

18. AVG AVG function is enabled;

recorded value is displayed.

19. MAX- Max-Min function is enabled;

MIN recorded value is displayed.

20. Record function is enabled.

21. Crest capture function is enabled.

22. Hold function is selected.

23. Automatic ranging is enabled.

24. Continuity

25. Low battery

26. } Overload symbol

(bar graph display)

27. 10 Bar graph maximum range

indicator

28. dBm Decibel

29. m Milli (10

-3

)

30. V Volt

31. A Ampere

32. n Nano (10

-9

)

33. µ Micro (10

-6

)

34. S Siemen

35. F Farad

36. D% Duty cycle function is enabled.

37. k Kilo (10

3

)

38. Hz Hertz (frequency in

cycles per second)

39. M Mega (10

6

)

40. Ω Ohm

Secondary Display

41. M Mega (10

6

)

42. k Kilo (10

3

)

43. Ω Ohm

44. Hz Hertz (frequency in

cycles per second)

45. m Milli (10

-3

)

46. µ Micro (10

-6

)

47. A Ampere

48. V Volt

49. D% Duty cycle function is enabled.

50. n Nano (10

-9

)

51. S Siemen

52. F Farad

53. 8.8.8.8 Numeric display

54. DC measurement is selected.

55. AC measurement is selected.

56. – Polarity indicator

57. T1 T1 function is enabled.

58. T2 T2 function is enabled.

Display Icons

23

20-22

19

18

16-17

15

13

12

11

10

8-9

14

49-52

45-48

41-44

39-40

37-38

36

32-35

28-31

26

27

2524

57-58

54-56 53

8

All Models

• Dual Digital Display: These meters can display two measurements, such as AC voltage and

frequency, at the same time. Display combinations are shown using large symbols to indicate the

measurement on the primary display and small, raised symbols to indicate the measurement on

the secondary display. For example, “VAC

Hz

” means the primary display contains the AC voltage

measurement, and the secondary display contains the frequency measurement.

• SELECT: Press momentarily to toggle between functions, or to toggle between AC and DC when

measuring current and millivolts.

• 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.

Note: When using MAX-MIN, HOLD, or ∆ mode, pressing RANGE will cause the meter to exit that

mode.

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

display to zero. The ∆ icon 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.

This feature does not affect the bar graph.

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

automatically turns off after approximately 30 seconds to extend battery life.

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

30minutes of inactivity. To restore power, press either the SELECT, RANGE, ∆, or HOLD button

momentarily, or turn the selector to OFF and then back on. To disable this feature, press SELECT

while turning the meter on.

• Disabling the Beeper: Hold down the RANGE button while turning the meter on to temporarily

disable the beeper feature. Turn the selector to OFF and then back on to enable the beeper.

DM-820A, DM-830A, and DML-430A Only

• CREST : Press momentarily to activate the crest recording mode.The input value is measured

every 1 ms in this mode. and “MAX” will appear on the display. The LCD will display the maximum

crest value. Press repeatedly to select the desired display: maximum, minimum, or maximum–

minimum crest value. Press and hold to exit this mode.

The automatic power off feature is disabled when using this function.

Note: When using the CREST function, pressing RANGE will cause the meter to exit this mode.

• REC : Press momentarily to activate the MAX/MIN/AVG* recording mode. The input value is

measured every 50 ms in this mode. “MAX MIN” and “AVG”* will appear on the display. The LCD will

display the actual input value. The meter will beep whenever the maximum or minimum is updated.

Press repeatedly to select the deired display: maximum, minimum, maximum–minimum, average*,

or actual input. Press and hold to exit this mode.

*Average function is not available on DML-430A.

The automatic power off feature is disabled when using this function.

Using the Features

DM-810A • DM-820A • DM-830A • DML-430A

9

Using the Features (cont’d)

Note: When using the REC function, pressing RANGE will cause the meter to exit this mode.

DM-820A and DM-830A Only

• EF: Set the meter to any current or voltage function. Press and hold until the meter displays “EF” 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 for direct contact veriﬁcation of a signal.

DM-830A and DML-430A Only

• Low Impedance AutoCheck™ Mode: In this mode, the meter automatically selects the proper

measurement based on the input.

• If there is no input, “Auto” appears on the display.

• If the voltage is above approximately 1.5 volt DC or 3 volt AC up to the rated 1000 volts, voltage

is displayed.

• If both AC and DC voltages are present, the larger voltage is displayed.

• If no voltage is present and there is resistance less than 60 MΩ, resistance is displayed. If the

measured resistance is below the continuity threshold (between 20 Ω and 300 Ω), then the

continuity tone will sound.

This mode features low input impedance to mask stray or “ghost” voltage pickup. The input imped-

ance is approximately 3 kΩ at low voltage, increasing to approximately 460 kΩ at 1000 V.

The symbol “LoZ” indicates that the meter is in a low impedance mode. Do not use the AutoCheck™

mode on circuits that could be damaged or activated by such low input impedance. Instead use the

selector to select the high impedance AC or DC volt modes to minimize loading for such circuits.

Range-Lock and Function Feature: While in the AutoCheck™ mode, press the SELECT button

momentarily to lock the displayed function. Press the RANGE button momentarily to lock the dis-

played measurement range.

Energized Circuit Alert: If the resistance mode is locked in the AutoCheck™ mode and the leads

are placed across an energized circuit, the meter will emit an audible warning tone.

• T1-T2: Press momentarily to select the desired temperature display: T1, T2, T1

T2

, or T1-T2

T2

.

• dBm-Ω (DM-830A only): In dBm mode, press momentarily to select the reference impedance. Refer

to the “Speciﬁcations” section for the available values.

• Blue Feature Buttons (DML-430A only): Refer to the “Data Storage Function” section for an

explanation of these features.

10

AC Measurement

AC measurements are usually displayed as RMS (root mean square) values. The RMS value is equal to

the value of a DC waveform, which would deliver the same power if it replaced the time-varying wave-

form. 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 after full

wave rectiﬁcation, multiplies it by 1.11, and displays the result. This method is accurate if the input

signal is a pure sine wave.

The true RMS-reading method uses internal circuitry to read the true RMS value. This method is accu-

rate, within the speciﬁed crest factor limitations, whether the input signal is a pure sine wave, square

wave, triangle wave, half wave, or signal with harmonics. The ability to read true RMS provides much

more measurement versatility. The Greenlee DM-810A, DM-820A, DM-830A, and DML-430A are true

RMS meters.

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*

(x)

1.414 1 1.73 2

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

letter x.

AC + DC True RMS

AC + DC true RMS calculates both of the AC and DC components given by the expression

when making measurements and responds accurately to the total effective RMS value regardless of the

waveform. Distorted waveforms with the presence of DC components and harmonics may cause:

• Transformers, generators, and motors to overheat

• Circuit breakers to trip prematurely

• Fuses to blow

• Neutrals to overheat due to the triplen harmonics present on the neutral

• Bus bars and electrical panels to vibrate

The DM-830A and DML-430A are AC + DC true RMS meters.

DM-810A • DM-820A • DM-830A • DML-430A

11

Data Storage Function (DML-430A only)

The DML-430A has data storage and retrieval capability. It can store up to 87,000 measurements in

single display mode or 43,000 measurements in dual display mode. The data can later be reviewed on

the multimeter’s display, or downloaded the data to a computer using the optional interface DMSC-9U.

When in the recording mode, the meter takes a measurement, assigns that measurement to the next

available memory location, and repeats the process. This continues until the memory is full or until the

user manually stops the recording process.

The time interval between measurements (sampling rate) is selected by the user. A shorter time interval

will provide information about short-term ﬂuctuations, whereas a longer time interval will provide

information about general trends. The factory setting is the shortest time interval.

The time intervals are as follows: 0.05 seconds (0.1s for single T1/T2, Diode, and Ohms/nS; 0.5s for

Hz and Duty Cycle; 2s for Capacitance and dual screen T1/T2 and T1-T2), 0.1s, 0.5s, 1s, 2s, 3s, 4s, 5s,

10s, 15s, 30s, 60s,120s (two minutes), 180s (three minutes), 300s (5 minutes), and 600s (10 minutes).

The minimum total measurement time for the DML-430A is 72 minutes and 30 seconds; the maximum

is nearly 20 months.

When the sampling rate is 30s or greater, the meter will go to standby mode between measurements

to extend battery life. When the meter is in the standby mode, press SELECT momentarily to view the

display.

To set the measurement interval:

Press for 1 second or more and the meter will display the current measurement interval in seconds.

Press p or q to change the measurement interval. Press for 1 second or more to save the new

setting.

To start recording data:

Press the button for 1 second or more to start the data logging mode.

"LEFt" displays followed by the number of remaining memory in the logger. The number in the second-

ary display is the most signiﬁcant digit, and the numbers in the primary display are the least signiﬁcant

digits of the remaining memory points.

Momentarily press the Yes button to conﬁrm a new logging session without erasing the formerly logged

ones (up to 999 sessions can be stored without overwriting previous sessions). Press the Erase button

momentarily to erase all of the sessions and start from the ﬁrst session with full memory.

"Strt" will display on the primary screen and then the logger will start recording. When a sampling

speed of 30s or longer is selected, the meter will enter a power down mode after 4.5 minutes. Press

the SELECT button momentarily to resume real time display.

Options —during recording:

• Press the SELECT button momentarily to toggle the display mode between measuring data and

logged data item number. The secondary display contains the most signiﬁcant number and the

primary display contains the least signiﬁcant numbers of the logged data item number.

• Press the button momentarily to pause/resume logging.

12

Data Storage Function (DML-430A only) (cont’d)

To stop recording data:

While the meter is logging data, press the button for more than 1 second.

To review stored data:

Press p and q momentarily to enter Recall mode. The last session number displays for 0.5 seconds

and then displays the last logged data item as well the and annunciators.

Options —while reviewing data:

• Press p or q momentarily to step through the data.

• Press SELECT to toggle between the data and the logged data item number.

• Press and hold p or q to quickly scan through the data. Tone indicates that the ﬁrst or last mea-

surement is displayed.

• Press p and q momentarily to select another session page.

• Press p and q for 1 second for fast scrolling, and hold either p or q to quickly scroll through the

pages. Tone indicates that the ﬁrst or last session page is displayed.

• Press p or q momentarily while holding down the HOLD button to scan through the turning points

(the alternating high and low points) or the data set. “MAX” or “MIN” will ﬂash to indicate a high or

low point.

To exit Recall mode, rotate the selector to a different setting or turn the meter off.

DM-810A • DM-820A • DM-830A • DML-430A

13

Using the Optional Software

These meters are compatible with Greenlee DMSC-9U, an optically isolated computer interface cable

and software. It allows measurements to be logged to a personal computer using the Microsoft

®

Windows

®

operating system. It also allows retrieval of data stored in the internal memory of

DML-430A.

Installing the Software

1. Insert the CD into the computer’s CDROM drive.

2. The installation program should launch automatically. If it does not, double click on the CD icon in

“My Computer.”

3. The installation program menu will appear. Click on “Software Installation.”

4. Type your meter’s catalog number (for example, “DM-820A”) in the dialog box.

5. Complete the remaining dialog boxes according to user preferences.

Connecting the Optical USB Interface Cable

1. Align the key of the connector with the key slot on the meter.

2. Twist the connector clockwise until it locks into place.

3. Connect the cable to a USB port of the PC.

Key slot on back of meter

14

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 fuses.

• 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.

Settings Table

The meter stores the last used function of each selector position in its nonvolatile memory. If this is not

the correct function when you turn the selector, press SELECT until the desired icon appears.

The dual display options are shown along with the icons. In the table, “~V

Hz

” indicates that “~” and “V”

appear in the primary display, and “Hz” appears in the secondary display. This combination shows the

AC voltage measurement in the primary display and frequency in the secondary display.

To measure this

characteristic …

Set the selector to

this symbol…

Press SELECT until

these icons appear on

the display …

Connect

the red

lead to…

Connect the

black lead

to …

All Models

Voltage—AC

(1000 V max)

V

Hz

or Hz

~V

ΩV

COM

Voltage—DC

(1000 V max)

V or V

~V

ΩV

COM

Voltage—DC

(600 mV max)

mV or mV

~mV

ΩV

COM

Voltage—AC

(600 mV max)

mV

Hz

or Hz

~mV

ΩV

COM

This table continues on the next page.

DM-810A • DM-820A • DM-830A • DML-430A

15

Settings Table (cont’d)

To measure this

characteristic …

Set the selector to

this symbol…

Press SELECT until

these icons appear on

the display …

Connect

the red

lead to…

Connect the

black lead

to …

All Models (cont’d)

*Frequency—Logic Level

Hz

ΩV

COM

Frequency—Line Level

Voltage or Current

Set for voltage or

current according

to this table.

Any display option that

includes Hz

— —

% Duty Cycle D% D%

ΩV

COM

Resistance Ω Ω

ΩV

COM

Continuity

ΩV

COM

**Capacitance F

ΩV

COM

Diode V and diod

ΩV

COM

Current—AC/DC

(10 A max)

A

A, A

~A

or A

Hz

A COM

Current—AC/DC

(600 mA max)

mA

mA, mA

~mA

or mA

Hz

mAµA COM

Current—AC/DC

(6000 µA max)

µA

µA, µA

~µA

or µA

Hz

mAµA COM

DM-820A, DM-830A, and DML-430A Only

Conductance nS nS

ΩV

COM

Temperature (DM-820A) Temp °C or °F See Note 1 —

Dual Temperature

(DM-830A and DML-430A)

T1T2

°C or °F (press RANGE

for display options T1,

T2, T1

T2

or T1-T2

T2

)

See Notes

1 and 2

—

DM-820A and DM-830A Only

†EF (electric ﬁeld

detection)

Any voltage or

current function;

press and hold EF

for 1 s or more

EF

ΩV

(contact

mode only)

—

This table continues on the next page.

Operation (cont’d)

16

Settings Table (cont’d)

To measure this

characteristic …

Set the selector to

this symbol…

Press SELECT until

these icons appear

on the display …

Connect

the red

lead to…

Connect the

black lead

to …

DM-830A and DML-430A Only

Voltage—AC + DC

TrueRMS (1000 V max)

V

~V

ΩV

COM

Voltage—AC + DC

TrueRMS (600 mV max)

mV

~mV

ΩV

COM

Current—AC + DC

TrueRMS (10 A max)

A

~A

A COM

Current—AC + DC

TrueRMS (600 mA max)

mA

~mA

mAµA COM

Current—AC + DC

TrueRMS (6000 µA max)

µA

~µA

mAµA COM

†Auto select AC volts,

DC volts, resistance, and

continuity (low impedance

measurement)

AutoCheck

LoZ and

(LoZ with V,

V or Ω when

using Feature Lock)

ΩV

COM

DM-830A Only

dBm (0 dB = 1 mW in

reference impedance)

dBm

Reference

impedance and dBm

for 1 s, then dBm

Hz

(press RANGE to

change reference

impedance)

ΩV

COM

* Logic level frequency has a ﬁxed sensitivity and is for digital signals. Refer to “Accuracy”.

** Discharge capacitor before measurement. Refer to “Typical Measurements” regarding

polarized capacitors.

† Refer to “Using the Features” for a detailed description of this mode.

Note 1: T1+ connects to ΩV and T1– connects to COM.

Note 2: T2+ connects to mAµA and T2– connects to A.

Operation (cont’d)

DM-810A • DM-820A • DM-830A • DML-430A

17

Typical Measurements

Voltage Measurement

Current Measurement

18

Typical Measurements

Continuity Check

Capacitance Measurement Diode Measurement

Forward Bias

Reverse Bias

Resistance Measurement

DM-810A • DM-820A • DM-830A • DML-430A

19

Typical Measurements

Temperature

Electric Field

Detection (EF)

Refer to

“Using the Features”

for complete

instructions.

A–Non-contact

OR

B–Contact

A

B

20

Accuracy

Refer to 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 75% relative humidity.

True RMS Readings: Voltage and current accuracies are speciﬁed from 10% 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 < 3:1 at full scale

• Crest factor < 6:1 at half scale

All Models

AC Voltage (AC + DC Voltage on DM-830A and DML-430A Only)

Range

Accuracy at

50 to 60 Hz

Accuracy at

40 to 500 Hz

Accuracy at

500Hz to 1 kHz

Accuracy at

1to 3 kHz

Accuracy at

3 to 20 kHz

60.00 mV

± (0.5% +

0.03mV)

± (0.8% +

0.04mV)

± (2.0% +

0.03mV)

± (2% +

0.03mV)

± (2% +

0.03mV)

(1)

600.0 mV

± (0.5% +

0.3mV)

± (0.8% +

0.4mV)

± (2.0% +

0.3mV)

± (2% +

0.3mV)

± (2% +

0.3mV)

(1)

9.999 V

± (0.5% +

0.003V)

± (1.0% +

0.004V)

± (1.0% +

0.004V)

± (3% +

0.004V)

3 dB

99.99 V

± (± (0.5% +

0.03 V)

± (1.0% +

0.04V)

± (1.0% +

0.04V)

± (3% +

0.04V)

3 dB

999.9 V ± (0.5% + 0.3 V) ± (2.0% + 0.4 V) ± (2.0% + 0.4 V) ± (3% + 0.4V) Unspeciﬁed

(1)

Speciﬁed from 30% to 100% of range

Input Impedance: 10 MΩ, 50 pF nominal (80 pF nominal for 600 mV range)

DC Voltage

Range Accuracy

60.00 mV ± (0.12% + 0.02 mV)

600.0 mV ± (0.06% + 0.2 mV)

9.999 V ± (0.08% + 0.002 V)

99.99 V ± (0.08% + 0.02 V)

999.9 V ± (0.08% + 0.2 V)

Input Impedance: 10 MΩ, 50 pF nominal (80 pF nominal for 600 mV range)

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