Rigol DM3068-OB User manual

RIGOL
User’s Guide
DM3068 Digital Multimeter
Dec. 2010
RIGOL Technologies, Inc.

RIGOL
User’s Guide for DM3068
I
Guaranty and Declaration
Copyright
© 2010 RIGOL Technologies, Inc. All Rights Reserved.
Trademark Information
RIGOL is a registered trademark of RIGOL Technologies, Inc.
Publication Number
UGC06102-1110
Notices
RIGOL products are protected by patent law in and outside of P.R.C.
RIGOL reserves the right to modify or change parts of or all the
specifications and pricing policies at company’s sole decision.
Information in this publication replaces all previously corresponding material.
RIGOL shall not be liable for losses caused by either incidental or
consequential in connection with the furnishing, use or performance of this
manual as well as any information contained.
Any part of this document is forbidden to copy or photocopy or rearrange
without prior written approval of RIGOL.
Product Certification
RIGOL guarantees this product conforms to the national and industrial standards
in China. International standard conformance certification is in progress.
Contact Us
If you have any problem or requirement when using our products, please contact
RIGOL or your local distributors, or visit: www.rigol.com

RIGOL
User’s Guide for DM3068
II
Safety Requirement
General Safety Summary
Please review the following safety precautions carefully before putting the
instrument into operation so as to avoid any personal injuries or damages to the
instrument and any product connected to it. To prevent potential hazards, please
use the instrument only specified by this manual.
Use Proper Power Cord.
Only the power cord designed for the instrument and authorized by local country
could be used.
Ground The Instrument.
The instrument is grounded through the Protective Earth lead of the power cord.
To avoid electric shock, it is essential to connect the earth terminal of power cord
to the Protective Earth terminal before any inputs or outputs.
Observe All Terminal Ratings.
To avoid fire or shock hazard, observe all ratings and markers on the instrument
and check your manual for more information about ratings before connecting.
Use Proper Overvoltage Protection.
Make sure that no overvoltage (such as that caused by a thunderstorm) can reach
the product, or else the operator might expose to danger of electrical shock.
Do Not Operate Without Covers.
Do not operate the instrument with covers or panels removed.
Use Proper Fuse.
Please use the specified fuses.
Avoid Circuit or Wire Exposure.
Do not touch exposed junctions and components when the unit is powered.

RIGOL
User’s Guide of DM3068
III
Do Not Operate With Suspected Failures.
If you suspect damage occurs to the instrument, have it inspected by qualified
service personnel before further operations. Any maintenance, adjustment or
replacement especially to circuits or accessories must be performed by RIGOL
authorized personnel.
Keep Well Ventilation.
Inadequate ventilation may cause increasing of temperature or damages to the
device. So please keep well ventilated and inspect the intake and fan regularly.
Do Not Operate in Wet Conditions.
In order to avoid short circuiting to the interior of the device or electric shock,
please do not operate in a humid environment.
Do Not Operate in an Explosive Atmosphere.
In order to avoid damages to the device or personal injuries, it is important to
operate the device away from an explosive atmosphere.
Keep Product Surfaces Clean and Dry.
To avoid the influence of dust and/or moisture in air, please keep the surface of
device clean and dry.
Electrostatic Prevention.
Operate in an electrostatic discharge protective area environment to avoid
damages induced by static discharges. Always ground both the internal and
external conductors of the cable to release static before connecting.
Handling Safety
Please handle with care during transportation to avoid damages to keys, knob and,
interfaces as well as other parts on the panels.
The disturbance tests of all models conform to the P/F values of A based
on the standard of EN 61326: 1997+A1+A2+A3 instead of P/F values of
B.

RIGOL
User’s Guide for DM3068
IV
Input Terminal Protection Limit
The protection limit applies to input terminals:
1．Main input (HI and LO) terminals
HI and LO terminals are used for Voltage, Resistance, Capacitance,
Continuity, Frequency and Diodes measurements and should be used under
the following two conditions:
1) HI-LO protection limit: at most 1000 VDC or 750 VAC, this is also the
maximum measurable voltage. The limit can be expressed as 1000 Vpk.
2) LO-ground protection limit: at most 500 Vpk (relative) is allowed to float
at LO terminal with safety.
Since the HI terminal holds a maximum protection of 1000 Vpk relative to the
ground, the sum of the “float”and measured voltages cannot exceed 1000
Vpk.
2．Sampling (HI Sense and LO Sense/200 mA) terminals
HI Sense and LO Sense/200 mA terminals are used for 4-Wire Resistance
measurement and should be used under the following two conditions:
1) HI Sense-LO Sense/200 mA protection limit: 200 Vpk.
2) LO Sense/200 mA-LO protection limits: 0.5 Vpk. The current input fuse
on the rear panel provides the current passing through LO Sense/200
mA up to 500 mA protection.
3．Current input (10 A and Sense/200 mA) terminals
10 A and LO terminals are used for current measurements of 2 A and 10 A.
The maximum current which goes through the 10 A terminal is limited to 10
A by the internal fuse. LO Sense/200 mA and LO terminals are used for
current measurements ranging from 200 A to 200 mA. The maximum
current which go through the LO Sense/200 mA terminal is limited to 500
mA by the internal fuse.
NOTE:
In order to prevent the fuse from blowing out and protect the
multimeter, please use the current input terminals according to the
following requirements:
1) Do not connect the 10 A and LO Sense/200 mA input terminals into
the current measuring circuit at the same time.

RIGOL
User’s Guide of DM3068
V
2) Only use 10 A and LO terminals for measurements when the measured
current AC+DC RMS value goes within 200 mA and 10 A.
3) Select a proper current input terminal according to the estimated current
magnitude before connect the multimeter to AC supplies if you want to
use current measurement.
4) The current into 10 A cannot exceed 13.5 A, otherwise it will blow out
the internal fuse; while the current into the LO Sense/200 mA terminal
cannot exceed 650 mA, otherwise the current fuse from the rear panel
may be blown out.
IEC II Overvoltage Protection
In order to prevent electric shock, DM3068 provides overvoltage protection for
line-voltage mains connections meeting both of the following conditions:
1．The HI and LO input terminals are connected to the mains under
Measurement Category II conditions, defined below.
2．The mains are limited to a maximum line voltage of 300 VAC.
WARNING: IEC II includes electrical devices connected to mains at an outlet on a
branch circuit. Such devices include most small appliances, test equipments and
other devices that inserted into a branch socket.
DM3068 may be used to make measurements with the HI and LO inputs connected
to mains in such devices (up to 300 VAC), or to the branch socket itself. However,
DM3068 may be used with its HI and LO inputs connected to mains from neither
permanently installed electrical device such as a main circuit-breaker panel,
sub-panel disconnected box nor wired motors. Such devices and circuits are readily
to beyond the protection from DM3068.
NOTE: Voltages above 300 VAC may be measured only in circuits that are isolated
from mains. However, a transient overvoltage is also present in such circuits.
DM3068 was designed to safely withstand occasional transient overvoltage up to
2500 Vpk. Do not use this device to measure circuits whose transient overvoltage
may exceed this level.

RIGOL
User’s Guide for DM3068
VI
Safety Terms and Symbols
Terms in this Manual. These terms may appear in this manual:
WARNING
Warning statements indicate the conditions or practices that could result in
injury or loss of life.
CAUTION
Caution statements indicate the conditions or practices that could result in
damage to this product or other property.
CAT I (1000V)
IEC Measurement Category I. The maximum voltage can be measured by
HI-LO terminal is 1000Vpk.
CAT II (300V)
IEC Measurement Category II. Inputs may be connected to mains (up to
300VAC) in the case of overvoltage in Category II.
Terms on the Product. These terms may appear on the product:
DANGER indicates an injury or hazard may immediately happen.
WARNING indicates an injury or hazard may be accessible potentially.
CAUTION indicates a potential damage to the instrument or other property
might occur.
Symbols on the Product. These symbols may appear on the product:
Hazardous
Voltage
Refer to
Instructions
Protective
Earth
Terminal
Chassis
Ground
Test
Ground

RIGOL
User’s Guide of DM3068
VII
General Care and Cleaning
General Care:
Do not store or leave the instrument in where the instrument will be exposed to
direct sunlight for long periods of time.
Cleaning:
Clean the instrument regularly according to its operating conditions. To clean the
exterior surface, perform the following steps:
1. Disconnect the instrument from all power sources.
2. Clean the loose dust on the outside of the instrument with a lint- free cloth
(with a mild detergent and water). When clean the LCD, take care to avoid
scarifying it.
CAUTION
To avoid damages to the instrument, do not expose them to liquids which
are corrosive.
WARNING
To avoid injury resulting from short circuit, make sure the instrument is
completely dry before reconnecting into a power source.

RIGOL
User’s Guide for DM3068
VIII
Environmental Considerations
The following symbol indicates that this product complies with the applicable
European Union requirements according to Directives 2002/96/EC on waste electrical
and electronic equipment (WEEE) and batteries.
Product End-of-Life Handling
The equipment may contain substances that could be harmful to the environment or
human health. In order to avoid release of such substances into the environment and
harmful to human health, we encourage you to recycle this product in an appropriate
system that will ensure that most of the materials are reused or recycled
appropriately. Please contact your local authorities for disposal or recycling
information.

RIGOL
User’s Guide of DM3068
IX
DM3068 Digital Multimeter Overview
DM3068 is a 6 ½ digits, dual display digital multimeter. It was designed for users
who need high precision, many functions and auto measurement, combining
common measurement functions, various math operations and any sensor
measurements as well as other functions.
DM3068 has high-resolution 256 x 64 monochrome LCD, easy-to-use keypad
locations and key backlight as well as operation prompts. It supports RS232, USB,
LAN and GPIB interfaces, USB flash device storage, virtual terminal display and
control, remote network access.
Main Features:
Real 6 ½ digits reading resolution.
Minimum integration time: 0.006 PLC.
Dual display: synchronously show two different characteristics of a same
signal.
Preset mode: quickly recall preset configurations.
DC voltage range: -1050 V to 1050 V.
DC current range: -10.5 A to 10.5 A.
AC voltage range: True-RMS, 0 V to 787.5 V.
AC current range: True-RMS, 0 A to 10.5 A.
Resistance range: 0 Ωto 110 M Ω; support 2-wire (2WR) and 4-wire (4WR)
resistance measurements.
Capacitance range: 0 F to 110 mF.
Frequency range: 3 Hz to 1 MHz.
Continuity and Diode tests.
Any sensor measurements and three types of temperature sensors: TC, RTD
and THERM.
Plenty of math operations such as STA (MAX, MIN, AVG, ALL), P/F, dBm, dB,
REL under tendency and/or histogram views.
USB flash device available.
Plenty of interfaces: USB Device, USB HOST, GPIB, RS-232 and LAN. Conform
to USB-TMC, IEEE 488.2 standards, LXI-C and SCPI standards.
Compatible with multimeter’s commands from other manufacturers.
Front panel power switch controllable.

RIGOL
User’s Guide for DM3068
X
Built-in ten groups of system configurations and five groups of sensor
configurations with capabilities of remote control, storage or recall.
Configurations clone: can copy all configurations of the multimeter into other
DM3068 unit using a USB flash device.
English and Chinese menus, built-in help system.
Powerful remote control and any sensor editing software.

RIGOL
User’s Guide of DM3068
XI
Document Overview
Chapter 1 Quick Start
This chapter guides you to quicky familar with the front and rear panles, user
interface and measurement connections of the multimeter.
Chapter 2 Front-panel Operations
This chapter guides you how to use functions that the multimeter has.
Chapter 3 Remote Control
This chapter guides you how to control the multimeter from distance by using
either virtual panel based on web page or commands.
Chapter 4 Troubleshooting
This chapter provides some general troubleshootings.
Chapter 5 Measurement Tutorial
This chapter guides you how to eliminate possible errors caused during the
measurement and obtain accurate result.
Chapter 6 Specifications
This chapter lists specifications and characteristics.
Chapter 7 Appendix
Information about accessories and others such as the service.
Format Conventions:
Button: function buttons from the multimeter are expressed by an icon itself.
For example, denotes a dc voltage measurement function.
Menu: the operation menu under the screen is expressed by a combination of
menu character and shade. For example, the menu “REL”is expressed in this
document like “REL”.
Operation step: the possible procedures in this document are described
using an arrow for clarity. For example, “press REL”; this sentence has
a same meaning with “press and then REL”.

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User’s Guide for DM3068
XII
Contents
Guaranty and Declaration......................................................................... I
Safety Requirement.................................................................................II
General Safety Summary........................................................................... II
Safety Terms and Symbols ....................................................................... VI
General Care and Cleaning ...................................................................... VII
Environmental Considerations.................................................................VIII
DM3068 Digital Multimeter Overview .................................................... IX
Document Overview ............................................................................... XI
Chapter 1 Quick Start ........................................................................ 1-1
General Inspection .................................................................................1-2
Handle Adjustment.................................................................................1-3
Appearance and Dimensions ...................................................................1-4
The Front Panel .....................................................................................1-5
The Rear Panel ......................................................................................1-9
User Interface......................................................................................1-13
First-use of Multimeter..........................................................................1-14
Measurement Connections ....................................................................1-15
Using the Built-in Help System............................................................... 1-18
Using a Rackmount Kit.......................................................................... 1-19
Kit Parts List.................................................................................. 1-19
Tool Requirements ......................................................................... 1-20
Space Requirements ......................................................................1-21
Procedure of Installation ................................................................1-22
Chapter 2 Front-panel Operations...................................................... 2-1
To Set the Range ...................................................................................2-2
To Set the Resolution..............................................................................2-3
Basic Measurements...............................................................................2-5
To Measure DC Voltage ....................................................................2-5
To Measure AC Voltage.....................................................................2-7
To Measure DC Current ....................................................................2-9
To Measure AC Current .................................................................. 2-11

RIGOL
User’s Guide of DM3068
XIII
To Measure Resistance ...................................................................2-14
To Measure Capacitance .................................................................2-17
To Measure Continuity....................................................................2-19
To Measure Diode ..........................................................................2-21
To Measure Frequency and Period ...................................................2-22
To Measure Any Sensor.........................................................................2-25
User-defined Sensor.......................................................................2-27
Temperature sensor .......................................................................2-32
Preset Mode ........................................................................................2-36
Secondary Function Key ........................................................................2-37
Measurement Configuration...................................................................2-39
Integration Time............................................................................2-40
DC Impedance...............................................................................2-41
Auto Zero......................................................................................2-42
Offset Compensation......................................................................2-43
AC Filter........................................................................................2-44
Short-Circuit Resistance..................................................................2-45
Gate Time.....................................................................................2-46
Math Operations...................................................................................2-47
Math.............................................................................................2-48
Tendency Graph.............................................................................2-55
Histogram .....................................................................................2-56
Trigger ................................................................................................2-57
To Select a Trigger Source ..............................................................2-58
Reading Hold.................................................................................2-59
To Set the Trigger Parameters .........................................................2-60
Trigger Output...............................................................................2-61
Save and Recall....................................................................................2-62
Internal Storage ............................................................................2-64
External Storage ............................................................................2-64
To Save a File ................................................................................2-65
Utility ..................................................................................................2-66
Command Set................................................................................2-66
Interface Configurations .................................................................2-67
System Configuration .....................................................................2-74
Chapter 3 Remote Control ..................................................................3-1
Web Page Control.................................................................................. 3-2

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User’s Guide for DM3068
XIV
Command Control ..................................................................................3-5
Through USB...................................................................................3-6
Through LAN...................................................................................3-8
Through GPIB ............................................................................... 3-10
Through RS232 .............................................................................3-12
Chapter 4 Troubleshooting ................................................................ 4-1
Chapter 5 Measurement Tutorial ....................................................... 5-1
Loading Errors (DCV)..............................................................................5-2
True-RMS AC Measurements ...................................................................5-3
Crest Factor Errors (non-sinusoidal inputs) ...............................................5-5
Loading Errors (ACV)..............................................................................5-6
Chapter 6 Specifications .................................................................... 6-1
DC Characteristics ..................................................................................6-1
AC Characteristics ..................................................................................6-6
Frequency and Period Characteristics ..................................................... 6-10
Capacitance Characteristics ...................................................................6-12
Temperature Characteristics ..................................................................6-13
Measurement Rate ...............................................................................6-15
Other Measurement Characteristics........................................................6-17
General Specifications ..........................................................................6-19
Chapter 7 Appendix ........................................................................... 7-1
Appendix A: DM3068 Accessories ............................................................7-1
Appendix B: Warranty.............................................................................7-2
Appendix C: Have Comment On Our Document? .......................................7-3
Index........................................................................................................1

Chapter 1 Quick Start RIGOL
User’s Guide for DM3068
1-1
Chapter 1 Quick Start
This chapter guides you to quicky familar with the front and rear panles, user
interface and measurement connections of the multimeter.
This chapter contains the following topics:
General Inspection
Handle Adjustment
Appearance and Dimensions
The Front Panel
The Rear Panel
User Interface
First-use of Multimeter
Measurement Connections
Using the Built-in Help System
Using a Rackmount Kit

RIGOL Chapter 1 Quick Start
User’s Guide for DM3068
1-2
General Inspection
1．Inspect the shipping container for damage
Keep the damaged shipping container or cushioning material until the
contents of the shipment have been checked for completeness and the
instrument has passed both electrical and mechanical tests.
The consigner or carrier shall be liable for the damage to the instrument
resulting from shipment. RIGOL would not be responsible for free
maintenance/rework or replacement of the unit.
2．Inspect the instrument
In case of any damage, or defect, or failure, notify your RIGOL sales
representative.
3．Check the accessories
Please check the accessories according to the packing lists. If the accessories
are incomplete or damaged, please contact your RIGOL sales representative.

Chapter 1 Quick Start RIGOL
User’s Guide of DM3068
1-3
Handle Adjustment
To adjust the handle position of the multimeter, grip the handle in both sides and
pull it outward, then rotate the handle to a desired position, see figure below.
Figure 1-1 Handle Adjustment
Viewing Position Carrying Position
Figure 1-2 Locate the Multimeter

RIGOL Chapter 1 Quick Start
User’s Guide for DM3068
1-4
Appearance and Dimensions
Figure 1-3 Front Elevation Unit: mm
Figure 1-4 Side Elevation Unit: mm