GW Instek GOM-802 User manual

D.C. Milli-Ohm Meter

GOM-802

USER MANUAL

GW INSTEK PART NO. 82OM-80200MF1

ISO-9001 CERTIFIED MANUFACTURER

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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 Dist., New Taipei City 236, Taiwan.

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Table of Contents

SAFETY INSTRUCTIONS ....................................................4

Safety Symbols....................................................4

Safety Guidelines ................................................5

GETTING STARTED............................................................8

GOM-802 Characteristics....................................9

Key Features...................................................... 11

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

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

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

MEASUREMENT...............................................................21

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

Resistance Measurement .................................. 23

Compare Function............................................. 26

Temperature Measurement ............................... 32

Temperature Compensation .............................. 34

HANDLER/SCAN/ INTERFACE.........................................36

Handler Overview ............................................. 37

Scan Overview................................................... 38

Configure Interface ........................................... 42

FAQ ..................................................................................45

APPENDIX........................................................................46

Fuse Replacement ............................................. 47

Temperature Measurement ............................... 48

Specifications.................................................... 51

Declaration of Conformity................................. 54

INDEX ..............................................................................55

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GOM-802 User Manual

SAFETY INSTRUCTIONS

This chapter contains important safety instructions that

you must follow when operating the GOM-802 or when

keeping it in storage. Read the following before any

operation to insure your safety and to keep the

GOM-802 in the best possible condition.

Safety Symbols

These safety symbols may appear in this manual or on the GOM-802.

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 GOM-802 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.

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SAFETY INSTRUCTIONS

Safety Guidelines

General Guideline

CAUTION

Do not place any heavy objects on the GOM-802.

Avoid severe impact or rough handling that leads to

damaging the GOM-802.

Do not discharge static electricity to the GOM-802.

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

terminals.

Do not disassemble the GOM-802 unless you are

qualified as service personnel.

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

their requirements as follows. The GOM-802 falls under category

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/ 220V/230 V AC,

50/60Hz, 27VA, 22W

The power supply voltage should not fluctuate more

than 10%.

Connect the protective grounding conductor of the AC

power cord to an earth ground, to avoid electrical

shock.

Fuse

WARNING

Fuse type:

Line Voltage Rating Fuse

100V 90-110V T0.3A 250V

120V 108-132V T0.3A 250V

220V 198-242V T0.25A 250V

230V 216-250V T0.25A 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.

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GOM-802 User Manual

Cleaning the

GOM-802

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

GOM-802.

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: < 80%

Altitude: < 2000m

Temperature: 0°C to 40°C (operation)

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

requirements as follows. The GOM-802 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

Temperature: −10°C to 70°C

Disposal

Do not dispose this instrument as unsorted municipal

aste. 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.

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SAFETY INSTRUCTIONS

Power cord for the United Kingdom

When using the GOM-802 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.

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GOM-802 User Manual

GETTING STARTED

This chapter describes the GOM-802 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

instrument.

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 GOM-802 Characteristics.........................................9

Key Features........................................................... 11

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

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

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

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

4 Wire Kelvin Connection....................................... 19

Zeroing (Relative Function) ................................... 20

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GETTING STARTED

GOM-802 Characteristics

GOM-802 is a high precision programmable DC

Milli-ohm meter suitable for low resistance

measurements of switches, relays, connectors, PCB

tracks and a variety of other devices. With the

easy-to-use features, superior performance, and

automatic test interfaces, the GOM-802 is a dependable

instrument for resistance measurements.

Easy to Use

Features

The GOM-802 includes an easy to use comparator

function (HI-LO-GO) that is able to easily set upper and

lower limits for pass/fail testing. The alarm buzzer can be

used with the comparator function. The flexible handler

interface can be used to monitor the status of the

pass/fail testing.

The relative feature enables the GOM-802 to easily

compensate for any stray resistance. Up to 20 different

sets of HI-LO-GO settings can be stored to satisfy a

number of different testing conditions. The GOM-802 is

also able to recall the last test setting that was used every

time it is turned on.

Performance The GOM-802 has nine selectable measurement ranges

from 30mΩto 3MΩ, a constant current source of 1uA

to 1A, an accuracy of 0.05%, a 1uΩresolution and

performs measurements using four wire Kelvin

connections for accurate, consistent measurements.

The ability to choose between high measurement

accuracy with 7 samples/sec (full scale at 30000) or high

speed measurements with 30 samples/sec (full scale at

3000) allows the GOM-802 the flexibility to fulfill a

number of different measurement roles.

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GOM-802 User Manual

Temperature

Compensation

Temperature Compensation (Optional):

The optional temperature probe (PT-100) can be used to

extrapolate the resistance of a DUT at a certain

temperature. When the temperature coefficient and the

required temperature (of the resistance measurement) is

keyed in under TC mode, the GOM-802 will display the

extrapolated measurement.

Automatic

Testing

For automatic testing The GOM-802 has a handler

interface designed for automatic testing. The handler

interface outputs the status of PASS, FAIL, HI, LO,

READY and EOT signals and inputs a trigger control

signal. An RS-232 and GPIB option is also available for

computer control applications.

Applications Production testing for contact resistance of switches,

relays, connectors, cables and printed circuit boards

and other low resistance devices.

Component testing of resistors, motors, fuses and

heating elements.

Incoming inspection and quality assurance testing.

Conductivity evaluation for product design.

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