GW Instek GDM-8245 Bedienungsanleitung

Digital Multimeter

GDM-8245

USER MANUAL

GW INSTEK PART NO. 82DM-82450E01

ISO-9001 CERTIFIED MANUFACTURER

This manual contains proprietary information, which is protected by

photocopied, reproduced or translated to another language without

prior written consent of the Good Will company.

The information in this manual was correct at the time of printing.

However, Good Will continues to improve products and reserves

the right to change specifications, equipment, and maintenance

procedures at any time without notice.

Good Will Instrument Co., Ltd.

No. 7-1, Jhongsing Rd., Tucheng City, Taipei County 236, Taiwan.

Table of Contents

SAFETY INSTRUCTIONS ....................................................5

Safety Symbols....................................................5

Safety Guidelines ................................................6

GETTING STARTED..........................................................10

GDM-8245 Characteristics ................................ 11

Front Panel Overview ........................................ 12

Rear Panel Overview ......................................... 16

Set Up ............................................................... 17

BASIC MEASUREMENT....................................................20

Basic Measurement Overview........................... 21

AC/ AC mV/DC/ DC mV/AC+DC Voltage

Measurement .................................................... 22

DC/ DC 20A / AC/AC 20A/AC+DC Current

Measurement .................................................... 28

Resistance Measurement .................................. 31

Diode Test ......................................................... 33

Continuity Test .................................................. 34

Capacitance Measurement................................ 35

Calibration button ............................................. 36

ADVANCED MEASUREMENT ...........................................37

Advanced Measurement Overview .................... 38

dBm Measurement............................................ 39

Max/Min Measurement..................................... 40

Relative Value Measurement............................. 41

Hold Measurement ........................................... 42

AC+Hz Measurement........................................ 43

FAQ ..................................................................................44

APPENDIX........................................................................45

Fuse Replacement ............................................. 46

GDM-8245 User Manual

Specifications....................................................49

Declaration of Conformity.................................55

INDEX ............................................................................. 56

SAFETY INSTRUCTIONS

This chapter contains important safety instructions that

you must follow when operating the GDM-8245 or

when keeping it in storage. Read the following before

any operation to insure your safety and to keep the

GDM-8245 in the best possible condition.

Safety Symbols

These safety symbols may appear in this manual or on the GDM-8245.

WARNING

arning: Identifies conditions or practices that could

result in injury or loss of life.

CAUTION

Caution: Identifies conditions or practices that could

result in damage to the GDM-8245 or to other

properties.

DANGER High Voltage

ttention Refer to the Manual

Protective Conductor Terminal

Earth (ground) Terminal

Do not dispose electronic equipment as unsorted

municipal waste. Please use a separate collection facility

or contact the supplier from which this instrument was

purchased.

GDM-8245 User Manual

Safety Guidelines

General Guideline

CAUTION

Make sure that the voltage input level does not exceed

DC1200V/AC1000V. (Limitations apply, please see the

specifications)

Make sure the current input level does not exceed 20A.

Do not place any heavy objects on the GDM-8245.

Avoid severe impact or rough handling that leads to

damaging the GDM-8245.

Do not discharge static electricity to the GDM-8245.

Use only mating connectors, not bare wires, for the

terminals.

Do not perform measurement at the source of a

low-voltage installation or at building installations

(Note below).

Do not disassemble the GDM-8245 unless you are

qualified as service personnel.

(Note) EN 61010-1:2001 specifies the measurement categories and

their requirements as follows. The GDM-8245 falls under category

II(1200V) and III(600V).

Measurement category IV is for measurement performed at the

source of low-voltage installation.

Measurement category III is for measurement performed in the

building installation.

Measurement category II is for measurement performed on the

circuits directly connected to the low voltage installation.

Measurement category I is for measurements performed on circuits

not directly connected to Mains.

Power Supply

WARNING

AC Input voltage: 100V/ 120V/ 230 V AC, 50/60Hz

The power supply voltage should not fluctuate more

than 15%.

Connect the protective grounding conductor of the

AC power cord to an earth ground, to avoid electrical

shock.

SAFETY INSTRUCTIONS

Fuse

WARNING

Fuse type:

100V/120V T0.1A 250V

230V T0.08A 250V

Make sure the correct type of fuse is installed before

power up.

To avoid fire, only replace the fuse with the specified

type and rating.

Disconnect the power cord before fuse replacement.

Make sure the cause of a fuse blowout is fixed before

fuse replacement.

Cleaning the

GDM-8245

Disconnect the power cord before cleaning.

Use a soft cloth dampened in a solution of mild

detergent and water. Do not spray any liquid into the

GDM-8245.

Do not use chemicals or cleaners containing harsh

material such as benzene, toluene, xylene, and acetone.

Operation

Environment

Location: Indoor, no direct sunlight, dust free, almost

non-conductive pollution (Note below)

Relative Humidity: < 75%

Altitude: < 2000m

Temperature: 0°C to 50°C (operation)

(Note) EN 61010-1:2001 specifies the pollution degrees and their

requirements as follows. The GDM-8245 falls under degree 2.

Pollution refers to “addition of foreign matter, solid, liquid, or

gaseous (ionized gases), that may produce a reduction of dielectric

strength or surface resistivity”.

Pollution degree 1: No pollution or only dry, non-conductive pollution

occurs. The pollution has no influence.

Pollution degree 2: Normally only non-conductive pollution occurs.

Occasionally, however, a temporary conductivity caused by

condensation must be expected.

Pollution degree 3: Conductive pollution occurs, or dry,

non-conductive pollution occurs which becomes conductive due to

condensation which is expected. In such conditions, equipment is

normally protected against exposure to direct sunlight, precipitation,

and full wind pressure, but neither temperature nor humidity is

controlled.

Storage

Environment

Location: Indoor

Relative Humidity: < 75% (0~35°C),<50% (35~50°C)*

Temperature: 40°C to 70°C

*Excluding 2M/20Mranges

GDM-8245 User Manual

Disposal

Do not dispose this instrument as unsorted municipal

waste. Please use a separate collection facility or

contact the supplier from which this instrument was

purchased. Please make sure discarded electrical waste

is properly recycled to reduce environmental impact.

SAFETY INSTRUCTIONS

Power cord for the United Kingdom

When using the GDM-8245 in the United Kingdom, make sure the power

cord meets the following safety instructions.

NOTE: This lead / appliance must only be wired by competent persons

WARNING: THIS APPLIANCE MUST BE EARTHED

IMPORTANT: The wires in this lead are coloured in accordance with the

following code:

Green/ Yellow: Earth

Blue: Neutral

Brown: Live (Phase)

As the colours of the wires in main leads may not correspond with the

coloured marking identified in your plug/appliance, proceed as follows:

The wire which is coloured Green & Yellow must be connected to the Earth

terminal marked with either the letter E, the earth symbol or coloured

Green/Green & Yellow.

The wire which is coloured Blue must be connected to the terminal which is

marked with the letter N or coloured Blue or Black.

The wire which is coloured Brown must be connected to the terminal

marked with the letter L or P or coloured Brown or Red.

If in doubt, consult the instructions provided with the equipment or contact

the supplier.

This cable/appliance should be protected by a suitably rated and approved

HBC mains fuse: refer to the rating information on the equipment and/or

user instructions for details. As a guide, a cable of 0.75mm2should be

protected by a 3A or 5A fuse. Larger conductors would normally require 13A

types, depending on the connection method used.

Any exposed wiring from a cable, plug or connection that is engaged in a live

socket is extremely hazardous. If a cable or plug is deemed hazardous, turn

off the mains power and remove the cable, any fuses and fuse assemblies. All

hazardous wiring must be immediately destroyed and replaced in accordance

to the above standard.

GDM-8245 User Manual

GETTING STARTED

This chapter describes the GDM-8245 in a nutshell,

including its main features as well as its front and rear

panels. After going through the panel overview, follow

the Power-up sequence before attempting to use the

DMM.

Please note the information in this manual was correct

at the time of printing. However as GW Instek

continues to improve its products, changes can occur at

any time without notice. Please see the GW Instek

website for the latest information and content.

Characteristics GDM-8245 Characteristics..................................... 11

Panel Overview Front Panel Overview............................................. 12

Measurement keys (Upper row)............................. 13

Measurement keys (Lower row) ............................. 14

Rear Panel Overview .............................................. 16

Setup Tilt Stand ............................................................... 17

Power Up ............................................................... 18

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