GW Instek GDM-906 Series User manual

Dual Measurement Multimeter
GDM-9060/9061
USER MANUAL
GW INSTEK PART NO. 82DM-90610E01
ISO-9001 CERTIFIED MANUFACTURER

This manual contains proprietary information, which is protected by
copyrights. 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
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 (R.O.C.).

Table of Contents
3
Table of Contents
SAFETY INSTRUCTIONS ....................................................5
Safety Symbols ....................................................................5
Safety Guidelines.................................................................6
GETTING STARTED ..........................................................10
Front Panel Overview ..........................................................13
Rear Panel Overview............................................................18
Status Bar ............................................................................21
Set Up..................................................................................24
BASIC MEASUREMENT ....................................................26
Basic Measurement Overview .............................................27
AC/DC Voltage Measurement..............................................30
AC/DC Current Measurement .............................................37
2W/4W Resistance Measurement........................................41
Continuity Test ....................................................................44
Diode Measurement ............................................................46
Frequency/Period Measurement..........................................47
Capacitance Measurement ..................................................51
Temperature Measurement .................................................54
DUAL MEASUREMENT ....................................................64
Dual Measurement ..............................................................64
ADVANCED MEASUREMENT ...........................................70
Advanced Measurement Overview ......................................71
Relative Value Measurement ...............................................72
Hold Measurement .............................................................74
Trigger Setting .....................................................................77
Filter Setting........................................................................83
Math Measurement .............................................................86
DIGITAL I/O ...................................................................110
Digital I/O Overview ...........................................................111

GDM-906X Series User Manual
4
Application: Compare Mode ............................................... 113
Application: 4094 / User Mode........................................... 120
Application: External Trigger............................................... 128
SYSTEM & FIRMWARE ...................................................130
View System Info ................................................................ 131
Firmware Update ................................................................ 132
MENU SETTING .............................................................134
Configure System ............................................................... 135
Configure Display ............................................................... 153
SCREENSHOT & LOG ....................................................171
Capture ............................................................................... 172
Save Reading ...................................................................... 175
DISPLAY SETTING..........................................................179
Digit.................................................................................... 180
Display................................................................................ 181
REMOTE CONTROL .......................................................200
Configure Interface ............................................................. 201
Web Control Interface ......................................................... 233
Command Syntax ................................................................ 238
Command Set ..................................................................... 241
Status system ..................................................................... 327
APPENDIX ......................................................................331
Fuse Replacement............................................................... 332
Battery Replacement ........................................................... 336
Factory Default Parameters ................................................ 338
Specifications ..................................................................... 342
GDM-9061 Section ............................................................. 343
GDM-9060 Section ............................................................. 354
Declaration of Conformity .................................................. 366
INDEX ............................................................................367

SAFETY INSTRUCTIONS
5
SAFETY INSTRUCTIONS
This chapter contains important safety instructions that
you must follow when operating the GDM-9060/9061
and when keeping it in storage. Read the following
before any operation to insure your safety and to keep
the GDM-9060/9061 in the best possible condition.
Safety Symbols
These safety symbols may appear in this manual or on the GDM-9060/9061.
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 GDM-9060/9061 or to other
property.
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.

GDM-906X Series User Manual
6
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 10A.
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 Sense LO terminal to Input LO is
limited to 2Vpk, the Sense HI to Sense LO terminals
are limited to 200Vpk and the Input LO to earth is
limited to 500Vpk.
(Note) EN 61010-1:2010 specifies the measurement categories and
their requirements as follows. The GDM-9060/9061 falls under
category II 300V.
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.
Power Supply
WARNING
AC Input voltage: 100/120/220/240 V AC ±10%,
50Hz / 60Hz / 400Hz ±10%
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.

SAFETY INSTRUCTIONS
7
WARNING
(GDM-9061 only)
Due to the fact that the Front/Rear Input Switch on
the front panel is not proposed as an active
multiplexer, do Not change the input switch when
signals are present on either rear or front set of
terminals. Intrument damage and risk of electric shock
may occur if switching the input switch when high
voltage or current is present.
Fuse
WARNING
Fuse type: T0.25A 100/120 VAC
T0.125A 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 into the
GDM-9060/9061.
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)
Temperature: Full accuracy for 0°C to 55°C.
Humidity:
< 30°C: < 80%RH (non-condensing)
30°C~40°C: <70%RH (non-condensing)
>40°C: <50%RH (non-condensing)
Altitude: <2000m

GDM-906X Series User Manual
8
(Note) EN 61010-1:2010 specifies the pollution degrees and their
requirements as follows. The GDM-9060/9061 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: −40°C to 70°C
Humidity: <90%RH(non-condensing)
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 GDM-9060/9061 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-906X Series User Manual
10
GETTING STARTED
This chapter describes the GDM-9060/9061 in a nutshell,
including an Overview of its main features and front /
rear panel introduction. After going through the
Overview, follow the Power-up sequence to properly
setup the GDM-9060/9061.
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.
Front Panel Overview.......................................................... 13
Measurement Keys (basic) ........................................................ 15
Measurement Keys (advanced) ................................................. 17
Rear Panel Overview ........................................................... 18
Status Bar ........................................................................... 21
Set Up................................................................................. 24
Horizontal/Tilt/Vertical Applications ........................................ 24
Power Up .................................................................................. 25

GETTING STARTED
11
GDM-9060/9061 Characteristics
The GDM-9060/9061 is a portable, dual-display digital
multimeter suitable for a wide range of applications, such
as production testing, research, and field verification.
Performance
The highest DCV accuracy:
GDM-9061: 35ppm
GDM-9060: 75ppm
The highest current:
GDM-9061: 10A
GDM-9060: 3A
The highest voltage: 1000V
The highest ACV frequency response: 300 kHz
The fastest sampling rate:
1k Readings/sec (GDM-9060)
10k Readings/sec (GDM-9061)
Internal memory:
10k read memory (GDM-9060)
100k read memory (GDM-9061)
Data Logging to USB
Features
6
2
1
digits
Multi functions: ACV, DCV, ACI, DCI, 2W/4W R, Hz,
Temp, Continuity, Diode, Period, Capacitance test,
REL, dBm, Hold, MX+B, 1/X, REF%, dB, Compare
and Statistics.
Manual or Auto ranging
AC true RMS
Built-in DC Ratio function
Up to 3 temerature measurements: RTD, Thermistor
and Thermocouples (Cold-Junction Compensation)
Graph Display: BarMeter, TrendChart, Histogram
Interface
USB device/RS232/GPIB(optional)/LAN for remote
control
9-pin Digital I/O port
USB device port supports USBCDC and USBTMC
USB Host

GDM-906X Series User Manual
12
Optional Items
GPIB card
GTL-207A
GTL-234
GTL-246
GTL-205
GTL-308

Test leads
RS-232 Cable , 2000mm
USB Cable, USB 2.0, A-B type, 1200mm
Temperature Probe Adapter with
Thermal Coupling (K-type)
4W+Shield Test leads , 1.5M

GETTING STARTED
13
Front Panel Overview
1
2
3
4
5 8 7 0 A B
6 9 C D
Item
Description
1
ESC (Escape) Key
2
Print screen / Data log Key
3
USB Host Port
4
Power Switch
5
Main Display
6
Function keys (F1 through F6, functions vary per modes)
7
Knob key
8
Arrow Keys
9
Measurement Keys
0
Range Selection Keys
A
HI and LO Sense Terminals
B
HI and LO Input Terminals
C
AC/DC Current Input Terminals (10 A terminal available on
GDM-9061 only)
D
Front/Rear Input Switch (GDM-9061 only)

GDM-906X Series User Manual
14
ESC (Escape) Key
Single press to escape from current page.
Presses and holds the ESC key for 2
seconds to toggle between full display
and simple display, which conceals the
status bar, math display as well as
additional info for lightweight use.
Refer to page 21, page 160 and page 168
for more details of status bar, math
display and additional info, respectively.
Screenshot / Data
Log Saving Key
Captures the current screenshot or saves
the data log for reading. For details, refer
to page 171.
USB Host Port
Connects with USB flash drive for data
storage.
Power Switch
Turns On or Off the main
power. For the power up sequence, see
page 25.
Main Display
The 4.3”TFT LCD shows measurement results and
parameters. For display configurations, see page 153.
Measurement
Keys
There are 4 rows in total of both basic and advanced
measurement keys deployed on the front panel. For the
details, refer to page 15 and page 17.
Function Keys
The 6 keys have varied functions per different settings.
Knob Key
Scrolls the knob to select parameters in
various setting pages. Press the key until
click to confirm setting.
Arrow Keys
Presses the left or right arrow keys to
move parameter cursor rightward or
leftward per requirement.
Range Selection
Keys
Presses the Auto key to activate
auto-range mode, whilst clicking “+”or
“–“ key can increase or decrease range
parameter, respectively.

GETTING STARTED
15
DC/AC 3A
Terminal
DC/AC current input
DC: 100μA~3A
AC: 100μA~3A
For details see page 37.
For the fuse replacement procedure, see
page 333.
Sense LO
Terminal
Accepts LO sense line in 4W resistance
measurement. For details, see page 41.
Sense HI
Terminal
Accepts HI sense line in 4W resistance
measurement. For details, see page 41.
Input LO
Terminal
Accepts ground (COM) line in all
measurements except the sense line in
4W Resistance (page 41).
The maximum withstand voltage
between this terminal and earth is
500Vpk.
Input HI
Terminal
Used as an input port for all
measurements except for DC/AC
Current measurements.
DC/AC 10A
Terminal
(GDM-9061 only)
Accepts DC/AC Current input.
For DCI or ACI details, see page 37.
Measurement Keys (basic)
Background
The upper 2 rows of measurement keys are used for
basic GDM-9060/9061 measurements such as voltage,
current, resistance, continuity, diode, frequency, period,
capacitance and temperature. Each key has a primary
and secondary function individually. The secondary
function is accessed in conjunction with the Shift key.

GDM-906X Series User Manual
16
Shift
The Shift key is used to select the
secondary functions assigned to each
front panel key. When pressed, the
Shift indicator appears in the display.
Local
For the Local key, it helps release
from the remote control and
returns the instrument to local
panel operation (page 201).
ACV
Measures AC Voltage (page 30).
Shift →ACV (ACI)
Measures AC Current (page 37).
DCV
Measures DC Voltage (page 30).
Shift →DCV (DCI)
Measures DC Current (page 37).
Ω2W (Resistance)
Measures 2-wire Resistance (page
41).
Shift →Ω2W (Ω4W
Resistance)
Measures 4-wire Resistance (page
41 ).
(Continuity)
Tests Continuity (page 44).
Shift →
(Diode )
Tests Diode (page 46).
FREQ (Frequency)
Measures Frequency (page 47).
Shift + FREQ
(Capacitance )
Measures Capacitance (page 51).
TEMP
(Temperature)
Measures Temperature (page 54).

GETTING STARTED
17
Measurement Keys (advanced)
Background
The lower 2 rows of measurement keys are used for
more advanced functions. Each key has a primary and
secondary function. The secondary function is accessed
in conjunction with the Shift key.
REL
Measures the Relative value (page
72).
Shift →REL
(REL#)
Manually sets the reference value for
the Relative value measurement
(page 72).
Hold
Activates the Hold function (page
74).
Shift →Hold
(Hold#)
Manually sets the parameters for the
Hold measurement (page 74).
TRIG (Trigger)
Activates the Trigger function (page
77).
Shift →TRIG
(TRIG#)
Manually sets the parameters for the
Trigger function (page 77).
Menu
Enters the setting pages in various
Menus (page 134).
Shift →Menu
(Filter)
Manually sets the parameters for the
Filter function (page 83).
DISP
Display settings (page 179).
Shift →DISP
(Math)
The Math functions including dB,
dBm, Compare, MX+B, 1/X and
Percent manually (page 86).

GDM-906X Series User Manual
18
Rear Panel Overview
1
240
2 5 9 0 A
4 3 6 7 8 B
Item
Description
1
HI and LO Sense Terminals (GDM-9061 only)
2
HI and LO Input Terminals (GDM-9061 only)
3
3 A Current Terminal (GDM-9061 only)
4
3 A Current Terminal Fuse
5
DIGITAL I/O Connector
6
RS-232 Interface Connector
7
USB Interface Connector (B Type)
8
Ethernet (LAN) Connector
9
Fan Vents
0
AC Mains Input (Power Cord Socket)
A
AC Mains Line Voltage Selector and Fuse Socket
B
GPIB Connector (optional)

GETTING STARTED
19
Power Cord Socket
Accepts the power cord. AC
100/120/220/240V ±10%,
50Hz / 60Hz /400Hz ±10%.
For power on sequence, see page
25.
Fuse Socket
Holds the main fuse:
100/120 VAC: T0.25A
220/240 VAC: T0.125A
For fuse replacement details, see
page 332.
RS-232C port
Accepts an RS-232C cable for
remote control; DB-9 male
connector.
For remote control details, see
page 205.
USB device port
Accepts a USB device cable for
remote control; Type B, female
connector.
For remote control details, see
page 202.
LAN port
Accepts a LAN for remote
control;
For remote control details, see
page 216.
Digital I/O port
Accepts a digital I/O cable for the
Hi/Lo limit tests; DB-9 pin,
female connector.
For digital I/O details, see page
110.
Optional GPIB port
Accepts an optional GPIB card.
For GPIB details, see page 213.

GDM-906X Series User Manual
20
Fan Vents
For heat ventilation when machine
is under operation.
Sense LO Terminal
(GDM-9061 only)
Accepts LO sense line in 4W
resistance measurement. For
details, see page 41.
Sense HI Terminal
(GDM-9061 only)
Accepts HI sense line in 4W
resistance measurement. For
details, see page 41.
Input LO Terminal
(GDM-9061 only)
Accepts ground (COM) line in all
measurements except the sense
line in 4W Resistance (page 41).
The maximum withstand voltage
between this terminal and earth is
500Vpk.
Input HI
Terminal
(GDM-9061 only)
Used as an input port for all
measurements except for DC/AC
Current measurements.
DC/AC 3A Terminal
(GDM-9061 only)
DC/AC current input
DC: 100μA~3A
AC: 100μA~3A
For details see page 37.
DC/AC 3.15A Input
Current Fuse
Holds the current fuse: T3.15A,
500V , 5*20mm
For fuse replacement details, see
page 333.