GW Instek GDM-834X Series User manual

Dual Measurement Multimeter
GDM-834X Series
USER MANUAL
GW INSTEK PART NO. 82DM-83420EC1
ISO-9001 CERTIFIED MANUFACTURER

This manual contains proprietary information, which is protected by
copyright. All rights are reserved. No part of this manual may be
photocopied, reproduced or translated to another language without
prior written consent of 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
rights to change specification, 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.

Table of Contents
3
Table of Contents
SAFETY INSTRUCTIONS ................................................... 5
GETTING STARTED ......................................................... 10
Characteristics ..........................................11
Appearance ...............................................14
Set Up.......................................................24
OPERATION .................................................................... 29
Basic Measurement Overview ...................31
AC/DC Voltage Measurement....................33
AC/DC Current Measurement ...................38
Resistance Measurement ..........................43
Diode Test ................................................45
Capacitance Measurement ........................46
Continuity Test ..........................................48
Frequency/Period Measurement ...............51
Temperature Measurement .......................53
Dual Measurement Overview ....................57
Advanced Measurement Overview ............62
dBm/dB/W Measurement .........................63
Max/Min Measurement.............................66
Relative Measurement ..............................67
Hold Measurement ...................................69
Compare Measurement .............................70
Math Measurement...................................72
SYSTEM/DISPLAY CONFIGURATION .............................. 76
View Serial Number ..................................77
View Version Number ...............................77
Brightness Settings ...................................78
Input Resistance Settings .........................79

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Frequency/Period Input Jack Settings........80
Compatibility Settings ...............................81
Restore Factory Default Settings ...............82
USB STORE ..................................................................... 83
USB Store Overview ..................................84
REMOTE CONTROL .......................................................101
Configure Remote Control Interface ........102
Return to Local Control ...........................105
COMMAND OVERVIEW .................................................106
Command Syntax ....................................106
Command List.........................................111
FAQ ...............................................................................142
APPENDIX .....................................................................143
System Menu Tree...................................143
Factory Default Settings ..........................144
Replacing the AC Source Fuse .................145
Replacing the Input Fuse.........................146
Status system .........................................148
Specifications .........................................149
Dimensions ............................................155
Declaration of Conformity .......................156
INDEX............................................................................157

SAFETY INSTRUCTIONS
5
SAFETY INSTRUCTIONS
This chapter contains important safety instructions that you
must follow during operation and storage. Read the following
before any operation to ensure your safety and to keep the
instrument in the best possible condition.
Safety Symbols
These safety symbols may appear in this manual or on the
instrument.
WARNING
Warning: 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 DMM or to other
properties.
DANGER High Voltage
Attention 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 Guidelines
General
Guideline
CAUTION
Make sure that the voltage input level does not
exceed DC1000V/AC750V.
Make sure the current input level does not
exceed 12A.
Do not place any heavy object on the
instrument.
Avoid severe impact or rough handling that can
lead to damaging the instrument.
Do not discharge static electricity to the
instrument.
Use only mating connectors, not bare wires, for
the terminals.
Do not block or obstruct the cooling fan vent
opening.
Do not perform measurement at the source of a
low-voltage installation or at building
installations (Note below).
Do not disassemble the instrument unless you
are qualified as service personnel.
Make sure that the COM terminal to earth is
limited to 500Vpk.
(Note) EN 61010-1:2010 specifies the measurement categories and
their requirements as follows. The GDM-834X falls under category II
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.

SAFETY INSTRUCTIONS
7
Power Supply
WARNING
AC Input voltage: 100/120/220/240 V AC
50/60Hz
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: 0.125AT 100/120VAC
0.063AT 220/240 VAC
Make sure the correct type of fuse is installed
before power up.
To avoid risk of fire, replace the fuse only 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
Instrument
Disconnect the power cord before cleaning.
Use a soft cloth dampened in a solution of mild
detergent and water. Do not spray any liquid.
Do not use chemicals 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)
Temperature: 0°C to 50°C
Humidity: 0~35°C: < 80%RH
>35°C: <70%RH
Altitude: <2000m

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(Note) EN 61010-1:2010 specifies the pollution degrees and their
requirements as follows. The GDM-8342/8341 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
Humidity: 0~35°C: <90%RH
>35°C: <80%RH
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
9
Power cord for the United Kingdom
When using the unit 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-834X Series User Manual
10
GETTING STARTED
This chapter describes the GDM-8342 and GDM-8341
multimeters in a nutshell, including accessories, and package
contents, their main features and front / rear panel introduction.
Characteristics ................................................................ 11
Accessories................................................................. 12
Package Contents....................................................... 13
Appearance ..................................................................... 14
GDM-8342/8341 Front Panel .................................... 14
Display Overview ....................................................... 20
Rear Panel .................................................................. 22