Amprobe DM78B Manuale utente

DM78BDM78B

Digital

Multimeter

Pocket-Size Meter with

Protective Folding Cover

Operators Manual

Bedienungsanleitung

Manual de Instrucciones

Manuel d'Utilisation

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• Catalog

• Application notes

• Product specifications

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pn1566201_cover_press.pdf 8/25/2006 10:59:53 AM

MAX 450V

CAT. II

AUTO POWER OFF

OFF

VOLTS

DC / AC

RANGE

LOCK DATA

3200 Count Display

010

AC V

20 30

HOLD

MAX 450V

DC / AC

DM78B

Data Hold

Anzeigesperre

Congelación de

lecturas

Maintien

d'Affichage

3-3/4 digit LCD

3-1/2 Digit LCD

LCD de 3-1/2 dígitos

LCD 3-1/2 digits

32-segment

Bargraph

32 Segment

Bargraf

Barra

Analógica de

33 segmentos

Bargraphe à

32 segments

Manual Range

Button

Manuelle

Bereichswahl

Selección Manual

Sélection Manuelle

Selector Switch

Wahlschalter

Selector

Sélecteur

Function Button

Funktionsknopf

Selector de

Función

Bouton de

Fonctions

DM78B Inside Cover

DM78B

Digital Multimeter

Users Manual

•Bedienungshandbuch

•Manual de Uso

•Mode d’emploi

PN 2728886

July 2006

Limited Warranty and Limitation of Liability

Your Amprobe®product will be free from defects in material and

workmanship for 1 year from the date of purchase. This warranty

does not cover fuses, disposable batteries or damage from

accident, neglect, misuse, alteration, contamination, or abnormal

conditions of operation or handling. Resellers are not authorized to

extend any other warranty on Amprobe®’s behalf. To obtain

service during the warranty period, return the product with proof

of purchase to an authorized Amprobe®Test Tools Service Center

or to a Amprobe®dealer or distributor. See Repair Section above

for details. THIS WARRANTY IS YOUR ONLY REMEDY. ALL

OTHER WARRANTIES - WHETHER EXPRESS, IMPLIED OR

STAUTORY - INCLUDING IMPLIED WARRANTIES OF FITNESS

FOR A PARTICULAR PURPOSE OR MERCHANTABILITY, ARE

HEREBY DISCLAIMED. MANUFACTURER SHALL NOT BE LIABLE

FOR ANY SPECIAL, INDIRECT, INCIDENTAL OR CONSEQUENTIAL

DAMAGES OR LOSSES, ARISING FROM ANY CAUSE OR THEORY.

Since some states or countries do not allow the exclusion or

limitation of an implied warranty or of incidental or consequential

damages, this limitation of liability may not apply to you.

Digital Multimeter

Contents

Symbols ..............................................................................................1

Warnings and Precautions...................................................................1

Measuring Procedures.........................................................................2

Battery replacement.............................................................................3

Specifications ......................................................................................4

Repair..................................................................................................5

Symbols

B Battery WRefer to the manual

TDouble

insulated XDangerous Voltage

FDirect Current JEarth Ground

BAlternating

Current RAudible tone

I Fuse PComplies with EU

directives

Warnings and Precautions

•This instrument is EN61010-1 certified for Installation Category I

(600V). It may only be used to make measurements on energy

limited circuits within equipment and not directly connected to

mains.

•This instrument is IEC1010-1 certified for Installation Category II

300V. This instrument is EN61010-1 certified for Installation

Category II (300V). It is recommended for use with local level

power distribution, appliances, portable equipment, etc, where

only smaller transient overvoltages may occur, and not for

primary supply lines, overhead lines and cable systems.

•Do not exceed the maximum overload limits per function (see

specifications) nor the limits marked on the instrument itself.

•Exercise extreme caution when: measuring voltage >20V //

servicing CRT equipment.

•Inspect DMM, test leads and accessories before every use. Do

not use any damaged part.

•Never ground yourself when taking measurements. Do not touch

exposed circuit elements or probe tips.

•Do not operate instrument in an explosive atmosphere.

•Clean instrument with mild detergent only.

Buzzer

Note: The buzzer sounds for function change, Range Lock, Range

Hold, and continuity.

Measuring Procedures

General

Ranging: The meter defaults to autoranging when turned on, and

selects the range automatically. For Manual Ranging: press “Range

Lock” Button to hold selected range ( Zon the display ) Pressing

“Range Lock” again steps to next range. Hold button for 2 sec. to

return to Autorange mode.

Data Hold: Press the “Data Hold” Button to toggle in (“H”

displayed) and out of mode. Last reading is held on the display .

Press button again to release and display present readings.

Selector Switch . When the Selector Switch is in the ΩRG

position, press the Function Button to step between resistance,

continuity test (Ωand Rdisplayed), and diode test (G). When the

Selector Switch is in VOLTS position, press the Function Button to

step between AC voltage and DC voltage.

DC Voltage measurement

WWarning

For safety, do not attempt to measure voltages greater than

600 VDC.

1. Set function switch to VOLTS

2. If “AC” appears in display , press Function Button to select DC.

3. Connect black test lead to negative side of circuit being measured

and red lead to positive side.

4. Read value on display .

AC Voltage Measurement

WWarning

For safety, do not attempt to measure voltages greater than

600VAC.

1. Set Selector Switch to VOLTS.

2. Push Function Button so that “AC” appears in display .

3. Connect test leads to circuit. Connection must be in parallel with

circuit being measured.

4. Read value on display .

Resistance Measurement

WWarning

Before taking any in-circuit resistance measurements,

remove power to the circuit being tested and discharge all

capacitors in the circuit.

1. Set selector switch to ΩRG.

2. Press Function Button until O.L. and MΩappear on the display.

3. Connect the test leads to circuit.

4. Read value on the display.

Continuity Test

1. Set the Selector Switch to ΩRG

2. Press Function Button until Rappears in display.

3. Connect test leads to the circuit. Buzzer sounds when resistance is

< 35Ω

Diode Test

1. The diode should be disconnected from circuit. Required forward

voltage must be <1V.

2. Set selector switch to ΩRG.

3. Press Function Button until Gappears in display.

4. Connect black test lead to anode and red test lead to cathode of

the diode and note the reading.

5. Reverse test lead connections on diode. If the diode is good,

display will read half the value of step 3.

Battery Replacement

Power is supplied by two button-type batteries (NEDA 1166A or IEC

LR-44). “B” appears on the LCD display when replacement is needed.

WWarning

Before attempting to replace the battery, first disconnect the

test leads from any energized circuit.

1. Set Function Switch to off.

2. Remove battery cover screw

3. Slide off battery cover, note polarity, and change batteries (Fig -1-)

4. Replace battery cover and screw.

Specifications

General Specifications

Display: 3-3/4 digits LCD, 10mm high digits, max reading 3200.

Units/signs: AC, R, B, mV, V, Ω, kΩ, MΩ, G. Z, H, minus, and

decimal point.

Range selection: Autoranging and manual range lock.

Overrange indication: O.L.

Polarity indication: - is displayed; + in implied.

Battery warning: B displayed when <1.25V ±0.1V.

Sampling rate: 2/sec display. 20/sec bargraph.

Temperature/Humidity:

Operation: 0°to 40°C (32°to 104°F), <70% RH noncondensing:

Storage: -20°to 60°C (-4°to 140°F), <80% RH noncondensing.

Battery type: Two 1.5V (LR-44 or NEDA#1166A)

Battery life: 70 hours continuous operation.

Continuity test: buzzer alert.

Diode check: Good/Bad by the display value.

Battery saver: Turn-off after 10 minutes of non-use.

Dimensions (HXWXD) / Weight: 4.3”X2.2”X0.40”

(111.5x56x10.5mm) / 3oz (8.6g) including case.

Included with meter: Two 1.5V (LR-44) batteries, operator’s manual,

and carrying case.

Meets: EN61010-1:2001, Cat II 300V, Cat I 600V, UL1244;

EMC: Meets EN50081-1, EN50082-2

Agency Approvals: PEMC

This product complies with requirements of the following

European Community Directives: 89/336/EEC (Electromagnetic

Compatibility) and 73/23/EEC (Low Voltage) as amended by

93/68/EEC (CE Marking)

However, electrical noise or intense electromagnetic fields in the

vicinity of the equipment may distrub the measurement circuit.

Measuring instruments will also respond to unwanted signals that

may be present within the measurement circuit. Users should

exercise care and take appropriate precautions to avoid misleading

results when making measurements in the presence of electronic

interferences.

Electrical Specifications

(23

C, 80% RH Max)

Maximum input, all functions/ranges: 600VDC or AC rms.

DC Voltage

Ranges: 320mV, 3.2, 32, 320, 600V

Resolution: 100μV in 320mV rg.

Accuracy: ±2.0%rdg. +2dgt (exc. 3.2V rg: ±1.0%rdg +2dgt)

Input impedance: 320mV rg: >100MΩ; 3.2V rg: 11MΩ; all other:

10MΩ.

AC Voltage

Ranges: 3.2, 32, 320, 600V.

Resolution: 1mV in 3.2V range

Accuracy: ±4.0%rdg. +5dgt

Input impedance: 3.2V rg: 11MΩ; all others 10MΩ.

Resistance

Ranges: 320Ω, 3.2, 32, 320kΩ, 3.2, 32 MΩ

Resolution: 100mΩin 320Ωrg

Accuracy: 320Ωrg: ±2.0%rdg. +4dgt; 3.2, 32, 320kΩrgs: ±2.0%rdg.

+2dgt; 3.2MΩrg: ±6.0%rdg. +2dgt, 32MΩrgs: ±10.0%rdg. +2dgt

Test Current (range/A): 320Ω/<0.7mA; 3.2kΩ/<0.13mA; 32kΩ/<13μA,

320KΩ/1.3μA; 3.2MΩ/<0.13μA; 32MΩ/0.6mA(Vf=o.6V)

Diode Test

Range: 3.2V

Accuracy: ±1.0% rdg + 2 dgt

Test current: 0.6 mA (Vf=0.6V)

Continuity Check

Range: 320Ω

Indication: at approx R ≤35Ω

Test Current: 0.7mA

Specifications subject to change without notice.

Repair

All test tools returned for warranty or non-warranty repair or for

calibration should be accompanied by the following: your name,

company’s name, address, telephone number, and proof of purchase.

Additionally, please include a brief description of the problem or the

service requested and include the test leads with the meter. Non-

warranty repair or replacement charges should be remitted in the form

of a check, a money order, credit card with expiration date, or a

purchase order made payable to Amprobe®Test Tools.

In-Warranty Repairs and Replacement – All Countries

Please read the warranty statement and check your battery before

requesting repair. During the warranty period any defective test tool

can be returned to your Amprobe®Test Tools distributor for an

exchange for the same or like product. Please check the “Where to

Buy” section on www.amprobe.com for a list of distributors near you.

Additionally, in the United States and Canada In-Warranty repair and

replacement units can also be sent to a Amprobe®Test Tools Service

Center (see below for address).

Non-Warranty Repairs and Replacement – US and Canada

Non-warranty repairs in the United States and Canada should be sent

to a Amprobe®Test Tools Service Center. Call Amprobe®Test Tools

or inquire at your point of purchase for current repair and replacement

rates.

..... In USA In Canada

.....Amprobe®Test Tools Amprobe®®Test Tools

.....Everett, WA 98203 Mississauga, ON L4Z 1X9

.....Tel: 888-993-5853 Tel: 905-890-7600

.....Fax: 425-446-6390 Fax: 905-890-6866

Non-Warranty Repairs and Replacement – Europe

European non-warranty units can be replaced by your Amprobe®Test

Tools distributor for a nominal charge. Please check the “Where to

Buy” section on www.amprobe.com for a list of distributors near you.

.....European Correspondence Address*

.....Amprobe®Test Tools Europe

.....P.O. Box 1186

.....5602 BD Eindhoven

.....The Netherlands

*(Correspondence only – no repair or replacement available from this

address. European customers please contact your distributor.)

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