1

2

3

4

5

6

7

8

User’s Guide

Pocket Multimeter

4000 Count Autoranging DMM

Model: DM100

Warranty

EXTECH INSTRUMENTS CORPORATION warrants this instrument

to be free of defects in parts and workmanship for one year from date

of shipment (a six month limited warranty applies on sensors and

cables). If it should become necessary to return the instrument for

service during or beyond the warranty period, contact the Customer

Service Department at (781) 890-7440 ext. 210 for authorization or

visit our website at www.extech.com for contact information. A Return

Authorization (RA) number must be issued before any product is

returned to Extech. The sender is responsible for shipping charges,

freight, insurance and proper packaging to prevent damage in transit.

This warranty does not apply to defects resulting from action of the

user such as misuse, improper wiring, operation outside of

specification, improper maintenance or repair, or unauthorized

modification. Extech specifically disclaims any implied warranties or

merchantability or fitness for a specific purpose and will not be liable

for any direct, indirect, incidental or consequential damages. Extech's

total liability is limited to repair or replacement of the product. The

warranty set forth above is inclusive and no other warranty, whether

written or oral, is expressed or implied.

Copyright © 2004 Extech Instruments Corporation. All rights reserved

including the right of reproduction in whole or in part in any form.

DM100 V1.1 4/04

Safety

International Safety Symbols

This symbol, adjacent to another symbol or

terminal, indicates the user must refer to the manual

for further information.

This symbol, adjacent to a terminal, indicates that,

under normal use, hazardous voltages may be

present.

Double insulation

Safety Precautions

1.

Improper use of this meter can cause damage, shock, injury or

death. Read and understand this users manual before

operating the meter.

2.

Make sure any covers or battery doors are properly closed and

secured.

3.

Always disconnect the test leads from any voltage source

before replacing the battery or fuses.

4.

Do not exceed the maximum rated input limits.

5.

Use great care when making measurements if the voltages are

greater than 25VAC rms or 35VDC. These voltages are

considered a shock hazard.

6.

Always discharge capacitors and remove power from the

device under test before performing Capacitance, Diode,

Resistance or Continuity tests.

7.

Remove the battery from the meter if the meter is to be stored

for long periods.

Description

Meter Description

1.

3 3/4 Digit (4000 count)

2.

RELATIVE button

3.

SELECT button

4.

DATA HOLD button

5.

Hz/DUTY button

6.

Function switch

7.

Plastic case

8.

Test leads

Specifications

Electrical Specifications

Function

Range

Accuracy

DC Voltage

4.000V, 40.00V,

400.0V,500V

±(1.3% rdg + 3d)

4.000V, 40.00V

±(1.0% rdg + 10d)

AC Voltage

40-400Hz

400.0V, 500V

±(2.3% rdg + 5d)

400.0

Ω, 4.000kΩ,

40.00k

Ω, 400.0kΩ

±(2.0% rdg + 5d)

4.000M

Ω

±(5.0% rdg + 5d)

Resistance

40.00M

Ω

±(10.0% rdg + 5d)

40.00nF

±(5.0% rdg + 30d)

400.0nF

±(3.0% rdg + 15d)

Capacitance

4.000µF, 40.00µF,

100.0µF

±(10.0% rdg + 15d)

Frequency

5.000Hz, 50.00Hz,

500.0Hz, 5.000kHz,

50.00kHz, 500.0kHz,

10MHz

±(2.0% rdg + 5d)

Duty Cycle

0.1-99%

Max input voltage

500V AC/DC

Input Sensitivity,

10Vrms min. <9.999KHz

(Frequency Ranges)

40Vrms min. >99.99KHz

Diode Test

Test current 1mA max., open circuit voltage

of 1.5V typical

Continuity Check

Audible signal if the resistance is < 60

Ω

Display

4000 count 3 ¾ digit LCD

Over range indication

LCD displays “OL”

Polarity

Minus (-) sign for negative polarity.

Low Battery Indication

“BAT” symbol indicates low battery

condition.

Battery

CR2032 3V Lithium

Operating Temperature

32

Storage Temperature

14

Weight

1.7oz (50g)

Size

4.25x2.2x.5” (108x56x11.5mm)

Standard

IEC1010 CAT II 500V Pollution degree II,

CE Approved