SIGLENT TECHNOLOGIES SDM3055 Series User manual

SDM3055 Series
Digital Multimeter
User Manual
EN03B

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Contents
Copyright and Statement................................................................................................................... 1
General Safety Summary................................................................................................................... 2
Safety Terms and Symbols ............................................................................................................... 6
Daily Maintenance and Cleaning...................................................................................................... 7
Introduction of SDM3055................................................................................................................... 8
Abstract............................................................................................................................................... 9
Chapter 1 Quick Start............................................................................................................ 10
General Inspection...................................................................................................................... 11
To adjust the Handle................................................................................................................... 12
Front Panel.................................................................................................................................. 13
Back Panel.................................................................................................................................. 14
Power On .................................................................................................................................... 15
User Interface.............................................................................................................................. 16
Scan Card ................................................................................................................................... 17
Chapter 2 Function and Operation...................................................................................... 20
To Select Measurement Range.................................................................................................. 21
To Select Measurement Speed.................................................................................................. 23
Basic Measurement Functions.................................................................................................... 24
To Measure DC Voltage...................................................................................................... 25
To Measure DC Current ...................................................................................................... 27
To Measure AC Voltage ...................................................................................................... 29
To Measure AC Current....................................................................................................... 31
To Measure 2-Wire/4-Wire Resistance............................................................................... 33
To Measure Capacitance..................................................................................................... 37
To Measure Frequency or Period........................................................................................ 39
To Test Continuity................................................................................................................ 43
To Test Diode ...................................................................................................................... 45
To Measure Temperature.................................................................................................... 47

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Measurement Parameters .......................................................................................................... 51
AC Filter............................................................................................................................... 51
DC Input Impedance............................................................................................................ 51
Short-circuit Resistance....................................................................................................... 52
Dual-display Function.................................................................................................................. 53
Utility Function............................................................................................................................. 56
Store and Recall................................................................................................................... 56
Manage File......................................................................................................................... 58
I/O Configuration.................................................................................................................. 60
Board Test............................................................................................................................ 61
Firmware Update.................................................................................................................. 64
System Setup....................................................................................................................... 64
Acquire........................................................................................................................................ 67
Auto Trigger......................................................................................................................... 67
Single Trigger....................................................................................................................... 68
External Trigger.................................................................................................................... 69
Help System................................................................................................................................ 70
Math Function.............................................................................................................................. 72
Statistics............................................................................................................................... 73
Limits.................................................................................................................................... 74
dBm...................................................................................................................................... 76
dB......................................................................................................................................... 77
Relative Value...................................................................................................................... 78
DisplayMode............................................................................................................................... 79
Trigger......................................................................................................................................... 83
Hold MeasurementFunction........................................................................................................ 84
Chapter 3 Application Examples......................................................................................... 85
Example1: ReadingStatistic Functions...................................................................................... 86
Example2: To EliminateLeads Impedance................................................................................ 87

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Example3: dBm Measurement................................................................................................... 89
Example4: dB Measurement...................................................................................................... 90
Example5: Limits Test ................................................................................................................ 92
Example 6: Thermocouple setting and measurement................................................................ 94
Example7: To Use Hold MeasurementFunction........................................................................ 96
Example 8: To Use Application Software EasySDM............................................................... 97
Chapter 4 Measurement Tutorial......................................................................................... 98
True RMS AC Measurement....................................................................................................... 98
Crest Factor Errors(non-sinusoidalinputs)................................................................................. 99
LoadingErrors (AC Voltage) ..................................................................................................... 100
Applicationof the Analog Filter.................................................................................................. 101
Chapter 5 General Troubleshooting.................................................................................. 103
Chapter 6 Appendix ............................................................................................................ 104
Appendix A: Accessories.......................................................................................................... 104
Appendix B: Warranty summary ............................................................................................... 105
Appendix C: Daily Maintenance and Cleaning.......................................................................... 106
Appendix D: Contact SIGLENT................................................................................................. 107

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Copyright and Statement
Copyright
SIGLENT TECHNOLOGIES CO., LTD. All rights reserved.
Trademark Information
SIGLENT is registered trademark of SIGLENT TECHNOLOGIES CO., LTD.
Statement
⚫SIGLENT products are protected by patent laws in and outside of the P.R.China.
⚫SIGLENT reserves the rights to change the specification and price.
⚫Information in this publication replaces all previous corresponding published material.
⚫Contents in this manual are not allowed to be copied, extracted or translated in any form or by
any means withoutSIGLENT’s permission.

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General Safety Summary
Read the following safety precautions carefully to avoid any personal injuries or damages to the
instrument and any products connected to it. To avoid potential hazards, please use the instrument
as specified.
Use proper power line.
It’s only allowed to use the special power line which is approved by local state.
Ground the instrument.
The instrument is grounded through the protective terra conductor of the power line. The ground
conductor must be connected to the earth to avoid electric shock. Make sure the instrument is
grounded correctly before connecting its input or output terminals.
Connect the signal wire correctly
The potential of the signal wire is equal to the earth, so do not connect the signal wire to a high
voltage.
Observe all terminal ratings
Please observeall ratingsandsigninstructions on theinstrumentto avoid fire or electric shock. Before
connectingtheinstrument, pleaseread the manualcarefullytogain moreinformationaboutthe ratings.
Do not operate with suspected failures
If you suspect that the product is damaged, please contact SIGLENT’s qualified service personnel to
inspect it. Any repair and adjustment to the product or replacing a component should be done by
qualified personnel only.
Avoid circuit or wire exposure
Don’t touch exposed contacts or components when the power is on.
Don’t operate without covers.
Don’t operate the instrument with covers or panels removed.
Use proper fuse.
It’s only allowed to use the specified fuse for the instrument.
Use proper over-voltage protection.
Make sure there is no over-voltage (like voltage caused by thunder and lightning) reaching to the
instrument, otherwise the operator may suffer an electric shock.

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Antistatic protection.
Static electricity will cause damages to the instrument, so test in antistatic areas as far as possible.
Ground its inner and outer conductors to release the static electricity temporarily before connecting
the cable to the instrument.
Keep good ventilation.
Improper ventilation will cause the rise of the instrument’s temperature. Keep good ventilation and
check the vent and fan regularly when using it.
Keep the surface of the instrument clean and dry.
Do not operate in wet or damp conditions.
Do not operate in flammable or explosive environment.
The disturbance test of all the models meets the limit values of A in the standard of EN
61326-1:2021.

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Input terminal protection limitation
Protection limitation is defined for the input terminal:
1. Main input (HI and LO) terminal
HI and LO terminals are used for Voltage, Resistance, Capacitance, Continuity, Frequency and
Diode measurement. Two protection limitations are defined:
⚫HI-LO protection limitation: 1000VDC or 750AVC. It’s the maximum measurable voltage.
The limitation can be expressed as 1000Vpk.
⚫LO-ground protection limitation: LO terminal can “float”500Vpk relative to the ground
safely. The maximum protection limitation of HI terminal relative to the ground is 1000Vpk.
Therefore, the sum of the “float”voltage and the measured voltage can’t exceed 1000Vpk.
2. Sampling (HI sense and LO sense) terminal
HI sense and LO sense are used for 4-wire Resistance measurement. Two protection limitations
are defined:
⚫HI sense-LO sense protection limitation: 2000Vpk.
⚫LO sense-LO sense protection limitation: 2Vpk.
3. Current input (I) terminal
I and LO terminals are used for current measurement. The maximum current which go through
the I terminal is limited to 10A by the fuse on the back panel.
NOTE:
Voltage on the current input terminal corresponds to voltage on LO terminal. To keep good
protection, only use the fuse of specified type and level to replace this fuse.
IEC Measurement Category II Over-voltage Protection
SDM3055 Digital Multimeter provides over-voltage protection for line-voltage mains connections
meeting both of the following conditions toavoid the danger of electric shock:
⚫The HI and LO input terminals are connected to the mains under Measurement Category II
conditions as following.
⚫The maximum line voltage of the mains is 600VAC.

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WARNING:
IEC Measurement Category II includes electrical devices connected to mains at an outlet on a branch
circuit, such as most small appliances, test equipments, and other devices that plug into a branch
outlet or socket.
SDM3055 is capable of making measurements with the HI and LO inputs connected to mains in
such devices (up to 600VAC) or the branch outlet itself. However, the HI and LO terminals of
SDM3055
can’t be connected to mains in permanently installed electrical devices such as the main
circuit-breaker panels, sub-panel disconnected boxes and permanently wired motors. Such devices
and circuits are prone to exceed the protection limits of SDM3055.
NOTE:
Voltages above 600VAC only can be measured in circuits that are isolated from mains. However,
there may be transient over-voltage in circuits that are isolated from mains. SDM3055 is able to
withstand occasional transient over-voltage up to 2500Vpk. Please don’t use this instrument to
measure circuits that transient over-voltage may exceed this level.

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Safety Terms and Symbols
Terms in this manual. Terms may appear in this manual.
WARNING:
Warning statements indicate the conditions and behaviors that could result in
injury or loss of life.
CAUTION:
Caution statements indicate the conditions and behaviors that could result in
damage to this product or other
CAT I (1000V):
IEC Measurement Category I. The highest measurable voltage is 1000Vpk in
the HI-LO terminal
CAT II (600V):
IEC Measurement Category II. Inputs may be connected to mains (up to
600VAC) under Category II overvoltage
Terms used on the instrument. Terms may appear on the instrument:
DANGER
Indicates an injury or hazard that may immediately happen.
WARNING
Indicates an injury or hazard that may not immediately happen.
CAUTION
Indicates that a potential damage to the instrument or other property might
occur.
Symbols used on the instrument. Symbols may appear on the instrument.
Hazardous
Voltage
Protective
Earth Ground
Warning
Test
Ground
Chassis
Ground

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Daily Maintenance and Cleaning
Maintenance
When storing or placing the instrument, please avoid the liquid crystal display from direct
sunlight for a long time.
NOTE:
To avoid damages to the instrument or probe, please don’t place them in mist, liquid or solvent.
Cleaning
Please often clean the instrument or probe according to the use of them.
⚫Wipe the external ash of the instrument and probe by a soft rag. Be careful not to scratch
the transparent plastic protective screen when cleaning the liquid crystal screen.
⚫Use a soft rag that has been soaked by water to clean the instrument after cutting off the
power. Or use 75% isopropyl alcohol of water solvent to get a more thorough cleaning.
NOTE:
⚫To prevent the surface of the instrument or probe from damages, please don’t use any
corrosive or chemical cleaning reagents.
⚫Please make sure the instrument is already dry before restarting it to avoid short circuits or
personal injuries caused by water.

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Introduction of SDM3055
SDM3055 is a 5½ dual-display instrument, especially fitting to the needs of high-precision,
multifunction, and automation measurements. It realized a combination of basic measurement
functions, multiple math functions, and display functions, etc.
SDM3055 holds a 4.3-inch color TFT-LCD display screen with 480*272 high resolutions. Its clear
keyboard layout and operation hints make it easier and agility to use. Besides, it supports multi-
interface such as USB Device & Host, LAN and USB-GPIB (optional), which can meet users‟ demand
furthest.
Main Features:
⚫4.3-inch color TFT-LCD display screen with 480*272 high resolutions
⚫Real 5½ digits readings resolution
⚫Up to 150rdgs/S measurement speed
⚫True-RMS AC Voltage and AC Current measurements
⚫1 Gb Nand Flash size, mass storage configuration files and data files
⚫Built-in cold terminal compensation for thermocouple
⚫Support standard SCPI and control software on PC, compatible with commands of main stream
multimeters
⚫Supports dual-display function, Chinese and English menu
⚫Built-in help system, convenient to acquire information
⚫Support USB Device, USB Host, LAN, and USB-GPIB interfaces
⚫Configuration and measured data can be imported or exported via VXI 11, USBTMC and USB
flash drive, which is convenient for users to modify, view and backup

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Abstract
The manual mainly introduces corresponding information of operating the SDM3055 Digital
Multimeter. It contains these chapters:
Chapter 1 Quick Start
Guide you to prepare the SDM3055 Digital Multimeter and know about the Front/Back panel and
user interface.
Chapter 2 Function and Operation
Introduce the functions and operations of SDM3055 in details.
Chapter 3 Application Examples
Introduce you how to use strong measurement functions of this instrument easily through some
examples.
Chapter 4 Measurement Tutorial
Guide you to eliminate the errors that may appear during your measurement and obtain accurate
result.
Chapter 5 General Troubleshooting
Provide you some general troubleshooting.
Chapter 6 Appendix
Provide you information about accessories, warranties, troubleshooting, services and supports.

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Chapter 1 Quick Start
This chapter guides users to quickly get familiar with the front and rear panels, user interface and
measurement connections of the multimeter.
This chapter contains the following topics:
⚫General Inspection
⚫To adjust the Handle
⚫Front Panel
⚫Back Panel
⚫Power On
⚫User Interface
⚫Scan Card

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General Inspection
1. Inspect the shipping container.
Please keep the damaged 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.
Damagesofthe instrumentcaused by the shipmentwillbecompensatedbytheshipperorcarrier.
SIGLENT will not be responsible for the free repair or replacement.
2. Inspect the instrument.
If there exit any mechanical damages or lacking of components, or the instrument fails the
electrical and mechanical test, please contact your SIGLENT sales.
3. Check the accessories.
Check the accessories according to the packing list carefully. If there exit any accessories
damaged or missing, please contact your SIGLENT sales.

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To adjust the Handle
Adjust the handle position of SDM3055 properly to place the instrument stablyso that users can
manipulateandobservethedisplaybetter.Pleasegrip the handle by the two sides and pull it outward.
Then rotate the handle to the appropriate position. Please operate as the following diagram.
Diagram 1-1 Handle adjustment
Diagram 1-2 Horizontal Position
Diagram 1-3 Carrying Position

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Front Panel
SDM3055 Digital Multimeter provides users with briefand clear front panel. These control buttons are
group by logic and users only need choose corresponding buttons to carry out basic operations, as
shown in Diagram 1-4.
Diagram 1-4 Front Panel Overview
LCD Display
Auxiliary Measurement Function Keys
USB Host
Enable Trig Keys
Power Key
Direction Keys
Menu Keys
Signal Input Port
Basic Measurement Function Keys

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Back Panel
SDM3055 Digital Multimeter’s Back Panel provides users with abundant interfaces, including USB
Device, USB Host, LAN and GPIB (Only for SDM3055A), as shown in the following diagram.
Diagram 1-5 Back Panel Overview
Power Socket
10/100 Ethernet
Power Fuse
VMC Output
AC Voltage Selector
Ext Trig
Inspection card interface
Current Input Fuse
USB Device (USBTMC)