SDM3065X 系列数字万用表 用户手册SDM3065X Series
Digital Multimeter
User Manual
UM06036-E02B

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SDM3065X Series Digital Multimeter User Manual

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 ortranslated in any form or by any means without SIGLENT’s permission.

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SDM3065X Series Digital Multimeter User Manual

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 thepower 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 thesignal wire to a high voltage.

Observe all terminal ratings
Please observe all ratings and sign instructions on the instrument to avoid fireor electric shock. Before connecting the instrument, please read the manual
carefully to gain more information about the 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 andlightning) reaching to the instrument, otherwise the operator may suffer anelectric shock.

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SDM3065X Series Digital Multimeter User Manual

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 thestatic 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 61326-1:2013.
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: 200Vpk.

⚫

LO Sense-LO protection limitation: 200Vpk.

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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 rear 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 toreplace this fuse.

IEC Measurement Category II Over-voltage Protection
SDM3065X Digital Multimeter provides over-voltage protection for line-voltage
mains connections meeting both of the following conditions to
avoid 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.

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.
SDM3065X 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 SDM3065X can’t be connected tomains in permanently installed electrical devices such as the main circuitbreaker panels, sub-panel disconnected boxes and permanently wired
motors. Such devices and circuits are prone to exceed the protection limits of
SDM3065X.

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. SDM3065X is able to withstand occasional transient
over-voltage up to 4000Vpk. Please don’t use this instrument to measurecircuits 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 andbehaviors that could result in injury or loss of life.

CAUTION: Caution statements indicate the conditions andbehaviors 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 beconnected to mains (up to 600VAC) under Category II
overvoltage.

Terms used on the instrument. Terms may appear on the instrument:

DANGERWARNINGCAUTION

indicates an injury or hazard that may immediately happen.
indicates an injury or hazard that may not immediately happen.
indicates that a potential damage to the instrument or otherproperty might occur.

Symbols used on the instrument. Symbols may appear on the instrument.

Hazardous
VoltageV

Protective
Earth Ground

Warning

Test
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SDM3065X Series Digital Multimeter User Manual

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 whencleaning 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 SDM3065X
SDM3065X is a 6½ dual-display instrument, especially fitting to the needs ofhigh-precision, multifunction, and automation measurements. It realized a
combination of basic measurement functions, multiple math functions, anddisplay functions, etc.

SDM3065X holds a 4.3-inch color TFT-LCD display screen with 480*272 highresolutions. Its clear keyboard layout and operation hints make it easier andagility 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 6½ 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 withcommands 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 GPIB (only for
SDM3065XA) interfaces⚫

Configuration and measured data can be imported or exported via VXI
11, USBTMC and USB flash drive, which is convenient for users tomodify, view and backup

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Abstract
The manual mainly introduces corresponding information of operating theSDM3065X Digital Multimeter. It contains these chapters:

Chapter 1

Quick Start

Guide you to prepare the SDM3065X Digital Multimeter and know about the
Front/Back panel and user interface.

Chapter 2

Function and Operation

Introduce the functions and operations of SDM3065X in details.

Chapter 3

Application Examples

Introduce you how to use strong measurement functions of this instrument
easily through some examples.
.

Chapter 4General Troubleshooting

Provide you some general troubleshooting.

Chapter 5

Appendix

Provide you information about accessories, warranties, troubleshooting,
services and supports.

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SDM3065X Series Digital Multimeter User ManualContent
Copyright and Statement ................................................... IGeneral Safety Summary .................................................. II
Safety Terms and Symbols ............................................... V
Daily Maintenance and Cleaning ...................................... VI
Introduction of SDM3065X .............................................. VII
Abstract .......................................................................... VIII
Content ............................................................................. IX
Chapter 1 Quick Start ...................................................... 1
General Inspection .................................................................. 2
To adjust the Handle ............................................................... 3
Appearance and Size .............................................................. 4
Front Panel ............................................................................. 5
Back Panel .............................................................................. 8
Start the Multimeter ............................................................... 11
User Interface........................................................................ 12
Measurement Connections.................................................... 13
Scan Card ............................................................................. 16
To Use the Built-in Help System ............................................ 18

Chapter 2 Function and Operation ................................ 20
Measurement Configuration .................................................. 21
Range .............................................................................................. 22
Intergration Time and Resolution ..................................................... 24
DC Impedance ................................................................................. 26
Auto Zero ......................................................................................... 27
AC Filter ........................................................................................... 28
Short-circuit Resistance ................................................................... 29
Gate Time ........................................................................................ 30

Basic Measurement Functions .............................................. 31
To Measure DC Voltage .................................................................. 32
To Measure DC Current ................................................................... 34
To Measure AC Voltage ................................................................... 36
To Measure AC Current ................................................................... 38
To Measure Resistance ................................................................... 40
To Measure Capacitance ................................................................. 43
To Measure Frequency or Period .................................................... 45
To Test Continuity ............................................................................ 47
To Test Diode .................................................................................. 49
To Measure Temperature ................................................................ 51

Dual-display Function ............................................................ 54
Utility Function....................................................................... 57
Store and Recall .............................................................................. 58
Manage File ..................................................................................... 62
I/O Configuration ............................................................................. 63
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Board Test ....................................................................................... 65
Firmware Update ............................................................................. 68
System Setup .................................................................................. 69

Acquire .................................................................................. 71
Auto Trigger ..................................................................................... 72
Single Trigger .................................................................................. 73
External Trigger ............................................................................... 74

Help System .......................................................................... 75
Math Function ....................................................................... 77
Statistics .......................................................................................... 78
Limits ............................................................................................... 80
dBm ................................................................................................. 82
dB .................................................................................................... 83
Relative Value.................................................................................. 84

Display Mode ........................................................................ 85
Trigger................................................................................... 91
Hold Measurement Function ................................................. 92

Chapter 3 Measurement Tutorial................................... 93
True RMS AC Measurement ................................................. 93
Crest Factor Errors (non-sinusoidal inputs) ........................... 94
Loading Errors (AC Voltage) ................................................. 95

Chapter 4 General Troubleshooting .............................. 96
Chapter 5 Appendix....................................................... 97
Appendix A: Accessories Standard Accessories: .................. 97
Appendix B: Warranty summary ............................................ 98
Appendix C: Contact SIGLENT ............................................. 99

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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:

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General Inspection⚫

Handle Adjustment⚫

Appearance and Size⚫

The Front Panel⚫

The Back Panel⚫

Start the Multimeter⚫

User Interface⚫

Measurement Connections⚫

To Use the Built-in Help System

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SDM3065X Series Digital Multimeter User Manual

General Inspection
1. Inspect the shipping container.
Please keep the damaged container or cushioning material until the contents ofthe 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 instrument resulting
from shipment. SIGLENT would not be responsible for free maintenance/ reworkor replacement of the unit.

2. Inspect the instrument.
In case of any damage, or defect, or failure, notify your SIGLENT sales
representative.

3. Check the accessories.
Check the accessories according to the packing list. If the accessories areincomplete or damaged, please contact your SIGLENT sales representative.

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To adjust the Handle
Adjust the handle position of SDM3065X properly to place the instrument
stably so that users can manipulate and observe the display better. Please grip
the handle by the two sides and pull it outward. Then rotate the handle to theappropriate position. Please operate as the following diagram.

Diagram 1-1 Handle adjustment

Diagram 1-2 Horizontal Position

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Diagram 1-3 Carrying Position

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Appearance and Size
293.75mm

107.21 mm

260 .27mm

Diagram 1-4 Appearance and Size

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Front Panel

Diagram 1-5 Front Panel Overview

USB Host
By using this interface, users can store the current state or measurement
data into USB storage device. Users can also read the state files or
updated firmware from USB storage device.

Power Key
Long/short press the key to turn on/off the instrument.

LCD Display
The instrument provides a 4.3-inch color TFT-LCD display screen with
480*272 high resolutions that can the current function menus,
measurement parameter settings, system status, prompt messages andso on.

Menu Operation Keys
Press any softkey to activate the corresponding menu.

Measurement and Assistant Function Keys

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DC Voltage /Current Measurement

AC Voltage/ Current Measurement

2-Wire /4-Wire Resistance Measurement

Frequency /Capacitance Measurement

Continuity /Diode Test

Temperature Measurement/
Enable Multiple Scan Card Function
Enable Dual-display Function /Set Up the Utility

Acquire Function /Help System

Math Function /Display Function

Auto Trigger/ Stop

Single Trigger/ Hold Measurement Function

Return to local control of the instrument (when in
Remote mode).
Some of the front panel keys have text above them. This
indicates that the key has a function that you can accessby pressing and releasing [Shift] before pressing the key.

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Range and Direction Keys
Increase the measurement range

Decrease the measurement range

Select auto or manual range

Set up measurement parameter
Move the cursor
Page or down
Set up measurement parameter
Move the cursor

Apply the current setting

Signal Input Terminals
The measured signal (device) will be connected into the multimeter
through these terminals. Different measurement objects have different
connection methods. For details, please refer to “Measurement
Connections”.

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Back Panel

Diagram 1-6 Back Panel Overview

Power Socket
The multimeter accepts two types of AC supplies. Please use thepower cord provided in the accessories to connect the multimeter to the AC
power through this socket.
Note: a proper voltage scale must be first selected (through the Voltage
Selector) before power connection.

Power Fuse
The multimeter is already installed with a power fuse before leaving
factory. To replace a new one, please:1)Turn off the multimeter and remove the power cord.

2)

Press down the block tongue using a straight screwdriver (in the
direction of the dotted arrow in the figure below) and pull out of thefuse seat.

3)

Select a proper voltage scale.

4)

Replace a specified fuse.

5)

Reinstall the fuse seat into the slot.

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Diagram 1-7 Change the fuse

AC Voltage Selector
Select a proper voltage scale (110 V or 220 V) according to the AC
supply used.

Inspection card (option)
An optional 16-channel Data Acquisition Module can be installed in the
instrument.

USB Device
Connect the PC through this interface. You can use SCPI commands or
PC software to control SDM3065X remotely.

LAN
Through this interface, the multimeter can be connected to the network forremote control.

VMC Output
The multimeter outputs a low-true pulse from the [VM Comp] connector
after every measurement.

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Ext trigger
Trigger the multimeter by connecting a trigger pulse through the [Ext Trig]
connector. Note the external trigger source must be selected.

Current Input Fuse
The multimeter is already installed with a current Input fuse to provide 10
A maximum input protection before leaving factory. To replace a newone, please:1) Turn off the multimeter and remove the power cord.
2) Turn the fuse seat counterclockwise as shown in the figure using a straightscrew driver and then pull out the fuse seat3) Place a new specified fuse.
4) Reinstall the fuse seat into the slot.

Instrument Lockhole
You can use the safety lock to lock the multimeter in a fixed place ifnecessary.

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SDM3065X Series Digital Multimeter User ManualStart the Multimeter
Before connect the instrument to a power source, please select the ACvoltage selector on the rear panel of your multimeter according to the power
supply. Then connect the power cord as shown in the following figure.

Diagram 1-8 Connect Power Cord
Press the Power key on the front panel to start up the multimeter. If themultimeter does not start normally, please:

1. Make sure the power cord is in good connection.

2. Try to restart the multimeter, if it fails, check the power fuse and replace a
new one when necessary.

3. If the problem still remains, please contact SIGLENT.

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User Interface

Trigger

LAN Status Icon

Control Mode

Measurement
Function

Measurement
ResultRange
Operation Menu
Diagram 1-9 User Interface

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Measurement Connections
SDM3065X is designed with many measurement functions. After selecting thedesired measurement function, please connect the signal (device) under test to
the multimeter according to the method below. Do not discretionarily switch themeasurement function when measuring as it may cause damage to themultimeter. For example, when the test leads are connected to the related
current terminals, AC voltage measurement should not be taken.

DCV Measurement

ACV Measurement

DCI Measurement

ACI Measurement

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Resistance Measurement(2-wire)Resistance Measurement(4-wire)Capacitance Measurement

Frequency/Period
Measurement

Continuity Measurement

Diode Measurement

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SDM3065X Series Digital Multimeter User ManualTemperature Measurement(For RTD and thermcouple sensors)

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Scan Card
SDM3065x-sc in this multimeter supports 16 channel external patrol card andmulti-point multi signal test.
Table 1-1 Scan Card SC1016 measurement and test line connection.
Items
No. of wires
Number of channels[1]
DCV, ACV
2 wires (H, L)
12 pairs (CH1~CH12) (125VAC,110VDC)
DCI, ACI [2]2 wires (H, L)
4 pairs (CH13~CH16) (2A range only)[3]
2-Wire R,etc.
2 wires (H, L)
12 pairs (CH1~CH12)
4-Wire R
4 wires (Input H,
6 pairs (CH1 [input] &CH9 [sense],
L + Sense H, L)
2&8, ….6&12)
Notes: [1] In 200V gear, the input signal is limited to 125VAC and 110VDC.
[2] Only the current below 2.2A is measured, and the error is: accuracy ± 3%
(reading) + 0.02% (range)[3] There are capacitance, diode, continuity, frequency/period, temperature(thermocouple), temperature 2-W RTD. The No. of wires and the Number ofchannels are the same with 2-W resistance.

Operation Steps:
1.

Scanner Installation①Turn off the power and pull out the power cord.
②Unscrew the two screws and take out the cover plate of the slot.

③Press the connector button with your finger, and then insert the connecting
line.
④Lead out the connecting line from the opening of the cover plate as shown in
the figure, and then fix the connecting line on the cable fixing base.

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SDM3065X Series Digital Multimeter User Manual⑤Insert the scan card SC1016 into the body along the guide rail, and lock thetwo screws again.
⑥Plug in the power cord and turn it on.

2.

Measurement connection method(1) 2-wire measurement mode [1] (voltage, current, 2-W resistance,
capacitance, frequency/period, continuity, diode, temperature)

Notes: [1] Each channel of CH1-CH12 can be used for switching measurement ofvoltage, 2-W resistance, capacitance, frequency, continuity, diode, temperature,etc. CH13-CH16 channels are fixed for current measurement below 2.2A.
(2)4-wire measurement mode

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To Use the Built-in Help System
To obtain built-in help information of the product, please press [shift] + [Acquire]to enter help system, then use the direction keys to choose the help item youwant, finally press [OK] to obtain help information.

The common help information is listed as the following:

1.

Basic Measure.

2.

Measuring Temperature.

3.

Measuring Capacitance.

4.

Math Function.

5.

Dual-display Function.

6.

Saving and Recalling Information.

7.

Optional Multiple Scan Card.

8.

The convention and Tips of Softkeys.

9.

Technical Support.

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Chapter 2

Function and Operation

This chapter introduces how to use the functions of the multimeter from the front
panel. The chapter contains the following topics:⚫

To Set the Range⚫

To Set the Resolution⚫

Basic Measurement Functions⚫

Any Sensor Measurement⚫

Preset Mode⚫

Secondary Function Key⚫

Measurement Configuration⚫

Math Operations⚫

Trigger⚫

Save and Recall⚫

Utility

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Measurement Configuration
Most measurement parameters are user-defined. Changing a measurement
parameter will change the measurement precision and speed as well as the input
impedance. An appropriate measurement parameter based on the actual
application will ensure faster measurement or higher measurement precision.

The default measurement configurations of the multimeter can ensure theaccuracy of the measurement results in most cases. Users can directly use
these defaults for any measurement or modify the parameters of themeasurement function as required.

The parameters for different measurement function differ, see table below.

Table 2-1 Measurement parameter
FunctionsParameters
DCV
Range, Integration Time, DC impedance, Auto zero
ACV
Range, AC filter
DCI
Range, Integration Time, Auto zero
ACI
Range, AC filter
OHM (2WR、4WR) Range, Integration Time, Auto zero
CAP
Range
CONT
Short-circuit resistance
DIODE
Breakover voltage
FREQ/PREIOD
Gate time
TEMP
N/A

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Range

SDM3065X provides auto and manual range selecting modes. In auto mode, themultimeter selects a proper range automatically according to the input signal; inmanual mode, you can use the front panel key or menu key to set the range. The
auto mode can bring a lot of convenience for users while the manual mode
provides higher reading precision.

Method 1: use the front panel key to set the range

Manual Range, to increase range

To switch modes between Auto
Range and Manual Range

Manual Range, to decrease range
Diagram 2-1 Range Selection Keys
Method 2: use the menu key to select the range
Enter the specific measurement function and select [Range] in the menu to show
the range setting options, as shown in Diagram 2-2 (take DCV measure for
instance). Then press the menu operation key to activate thecorresponding configuration.

Diagram 2-2 Range selection menu

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SDM3065X Series Digital Multimeter User ManualNote:
1. “overload” will be displayed when the input signal exceeds the current
range.
2. By default, the range is set to Auto at power-on or after a reset.
3. Auto mode is recommended if you are not sure about the measurement
range in order to protect the instrument and obtain accurate data.
4. The range of CONT measurement is fixed at 2 KΩ.

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Intergration Time and Resolution

Integration time is the period during which the multimeter’s analog-to-digital(A/D) converter samples the input signal for a measurement. The longer the
integration time is, the slower the measurement speed will be and the higher the
resolution will be; the shorter the integration time is, the faster the measurement
will be and the lower the resolution will be. The integration time applies to DCV,
DCI, 2WR and 4WR measurements.

SDM3065X express the integration time by the power line cycles, the unit is
PLC. The multimeter automatically detects the input power frequency at poweron. I f the frequency is 50Hz, the integration time can be set to 0.005PLC, 0.05
PLC, 0.5 PLC, 1 PLC, 10 PLC, 100 PLC and the default is 10 PLC. If thefrequency is 60Hz, the integration time can be set to 0.006PLC, 0.06 PLC, 0.6
PLC, 1 PLC, 10 PLC, 100 PLC and the default is 10 PLC.

SDM3065X holds reading resolutions of 4½, 5½ and 6½ digits. It automaticallyselects a reading resolution according to the current measurement settings.

1.
In DCV, DCI and OHM measurements, press [Aperture] to set the
integration time, as shown in Diagram 2-5 (take DCV measurement for instance).
The integration time affects the resolution.

Diagram 2-3 Integration time selection menu

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Table 2-2 Relationship between reading resolution and integration time
Resolution Integration time
4½
0.005 PLC / 0.006PLC
0.05 PLC / 0.06PLC
5½

0.5 PLC / 0.6PLC

6½

1 PLC
10 PLC
100C

2.

In ACV, ACI, FREQ/PERIOD measurements, the resolution is fixed at 6½
digits.

3.

In CAP measurements, the resolution is fixed at 4½

4.

The instrument always displays 2 digits after the decimal point in CONT
measurement.

5.

In DIODE measurements, the resolution is fixed at 5½.

6.

In TEMP measurements, the resolution is fixed at 5½.

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DC Impedance

DC impedance applies to DCV measurement. The default is “10MΩ”. In therange of 200 mV, 2 V or 20 V, you can choose “>10GΩ” to reduce the loading
error to the measured object caused by the multimeterIn the range of 200 mV, 2 V or 20 V under DCV measurement, press [Input Z] inthe menu to perform the setting, as shown in Diagram 2-4.

Diagram 2-4 Choose DC Input Impedance⚫

10MΩ: set the input impedances in all ranges to 10 MΩ.

⚫

10GΩ: set the input impedances in ranges of 200 mV, 2 V and 20 V to 10
GΩ, while in ranges of 200 V and 1000 V, the impedances are still 10 MΩ.

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Auto Zero

Auto zero (Auto Zero) applies to DCV, DCI, 2WR and 4WR measurements.

Enter the specific measurement function and press [Auto Zero] in the menu toperform the setting, as shown in Diagram 2-5 (take DCV measurement for
instance).

Diagram 2-5 Turn on or off Auto Zero⚫

ON: the multimeter internally disconnects the input signal and measured
circuit after each measurement, and takes a zero reading. It then subtracts
the zero reading from the preceding reading (displaying the difference
between the measurement value and zero value during the measurement), in
order to reduce the impact of offset voltage from input circuit on
measurement result.

⚫

OFF: disable the auto zero function.

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AC FilterAC filter applies to ACV and ACI measurements. It can optimize the lowfrequency accuracy and minimize the AC settling time. SDM3065X provides
three types of AC filters (>3Hz, >20Hz, >200Hz).

The AC filter to be used is determined by the input signal frequency. You
should generally select the highest frequency filter whose frequency is less thanthat of the signal you are measuring, because higher frequency filters result infaster measurements. For example, when measuring a signal between 20 and
200 Hz, use the 20 Hz filter. If measurement speed is not an issue, choosing alower frequency filter may result in quieter measurements, depending on thesignal that you are measuring.

Press [Filter] in the menu of ACV or ACI measurement to show the setting
options, as shown in Diagram 2-6 (take ACV measurement for instance). Thenpress the menu operation key to activate the corresponding configuration.

Diagram 2-6 AC Filter setting interface

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Short-circuit ResistanceThis function only applies to continuity test. When the measured circuit has aresistance lower than the short-circuit resistance, the circuit is considered asconnected, and the beeper sounds (if sound is on). The default short-circuit
resistance is 50 Ω and the setting is stored in nonvolatile memory.

When continuity test is enabled, Set the [Threshold] (equal to short-circuit
resistance) using the direction keys. The range is from 1 Ω to 2000 Ω.

Diagram 2-7 Set Up the Short-circuit Resistance

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Gate Time

Gate time (also called Aperture Time) applies to FREQ/PERIOD function. It
decides the resolution of low-frequency measurement. The longer the gate time
is, the higher the resolution of the low-frequency measurement is and the slower
the measurement is, and vice versa.

In FREQ/PERIOD measurement, press [Gate Time] to show the setting options,as shown in Diagram 2-8 (take FREQ measurement for instance). The gate time
can be set to 1 ms, 10 ms, 100 ms or 1 s and the default is 100 ms. You canselect a desired gate time by pressing the corresponding softkey.

Diagram 2-8 Set Up the Gate Time

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Basic Measurement Functions
SDM3065X Digital Multimeters have following basic functions:⚫

To Measure DC Voltage⚫

To Measure AC Voltage⚫

To Measure DC Current⚫

To Measure AC Current⚫

To Measure 2/4-Wire Resistance⚫

To Measure Capacitance⚫

To Test Continuity⚫

To Test Diode⚫

To Measure Frequency or Period⚫

To Measure Temperature

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To Measure DC Voltage

Range: 200mV, 2V, 20V, 200V, 1000V
Max Resolution: 100nV (in the range of 200mV)
Input Protection: a 1000 V protection is available in all ranges and a 10%
overrange for all ranges except 1000 V range. If the reading exceeds therange, “overload” will be displayed.

Operating Steps:

1. Enable the DCV measurementPresson the front panel to enter the DC Voltage measurement
interface, as shown in Diagram 2- 9.

Diagram 2-9 DC Voltage Measurement Interface
2. Make connection
Connect the test leads with the measured signal by referring to“Measurement Connections”.
3. Set the range
Press [Range] to select a range for the measurement. You can also use the,, andkeys on the front panel to select the range. Auto
(auto range) automatically selects the range for the measurement basedon the input. Auto ranging is convenient, but it results in slower
measurements than using a manual range. Auto ranging goes up a range at
110% of the present range, and down a range below 10% of the present
range.

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4. Set the integration
Press [Aperture] and choose the number of power-line cycles (PLCs) to use
for the measurement. Selecting 100 PLC provides the best noise rejection andresolution, but the slowest measurements
5. Autozero setting
Press [Auto Zero] to enable or disable this function. Autozero provides themost accurate measurements, but requires additional time to perform the zeromeasurement. With autozero enabled (On), the DMM internally measures theoffset following each measurement. It then subtracts that measurement fromthe preceding reading. This prevents offset voltages present on the DMM’s
input circuitry from affecting measurement accuracy.
6. Specify the DC input impedance (Only for Manual 200mV,2V and 20V
ranges)Press [Input Z] to set the DC resistance as “10M” (default value) or “10G”.
Users can execute DC voltage measurement directly without modifying thisparameter which has been setup before leaving factory.
7. Set the relative value (Optional operation)
Press [Rel] to open or close Relative math function. When it is opened, thereading displayed is a value which comes from the result of actual
measurement value subtracts the relative value that has been set. The default
relative value is the measurement value when the function is opened. (Pleaserefer to “Math Functions” in Chapter 2 to know about the details.)
8. Read the measurement value
The multimeter measures the input signal according to the current
measurement settings and displays the measurement result on the screen.
9. Make math operation (advanced)
You can perform math operation (Statistics, Limit, dBm, dB and REL) on every
DCV measurement reading. For details, please refer to “Math Operations”.
10. Display the graph (advanced)
You can analyze the measurement data by using “Bar Meter”, “Trend Char” or“Histogram display”. For details, please refer to “Display Mode”.

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To Measure DC Current

Range: 200μA, 2 mA, 20 mA, 200 mA, 2A, 10A
Max Resolution: 0.1nA (in the range of 200μA)
Input Protection: a 10A protection is available in all ranges and a 10%
overrange for all ranges except 10A range. If the reading exceeds therange, “overload” will be displayed.

Operating Steps:

1. Enable the DCI measurement
Press
and
on the front panel to enter the DC Current measurement
interface, as shown in Diagram 2- 10.

Diagram 2-10 DC Current Measurement Interface
2. Make connection
Connect the test leads with the measured signal by referring to “Measurement
Connections”.
3. Set the range
Press [Range] to select a range for the measurement. You can also use the,, andkeys on the front panel to select the range. Auto (autorange) automatically selects the range for the measurement based on the
input. Auto ranging is convenient, but it results in slower measurements thanusing a manual range. Auto ranging goes up a range at 110% of the present
range, and down a range below 10% of the present range.

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4. Set the integration Time
Press [Aperture] and choose the number of power-line cycles (PLCs) to use
for the measurement. Selecting 100 PLC provides the best noise rejection andresolution, but the slowest measurements
5. Autozero setting
Press [Auto Zero] to enable or disable this function. Autozero provides themost accurate measurements, but requires additional time to perform the zeromeasurement. With autozero enabled (On), the DMM internally measures theoffset following each measurement. It then subtracts that measurement fromthe preceding reading. This prevents offset voltages present on the DMM’s
input circuitry from affecting measurement accuracy.
6. Set the relative value (Optional operation)
Press [Rel] to open or close Relative math function. When it is opened, thereading displayed is a value which comes from the result of actual
measurement value subtracts the relative value that has been set. The default
relative value is the measurement value when the function is opened. (Pleaserefer to “Math Functions” in Chapter 2 to know about the details.)
7. Read the measurement value
The multimeter measures the input signal according to the current
measurement settings and displays the measurement result on the screen.
8. Make math operation (advanced)
You can perform math operation (Statistics, Limit and REL) on every DCI
measurement reading. For details, please refer to “Math Operations”.
9. Display the graph (advanced)
You can analyze the measurement data by using “Bar Meter”, “Trend Char” or“Histogram display”. For details, please refer to “Display Mode”.

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To Measure AC Voltage

Range: 200mV, 2V, 20V, 200V, 750V
Max Resolution: 100nV (in the range of 200mV)
Input Protection: a 750 V protection is available in all ranges and a 10%
overrange for all ranges except 750 V range. If the reading exceeds therange, “overload” will be displayed.

Operating Steps:

1. Enable the ACV measurementPresson the front panel to enter the AC Voltage measurement
interface, as shown in Diagram 2- 11.

Diagram 2-11 AC Voltage Measurement Interface
2. Make connection
Connect the test leads with the measured signal by referring to“Measurement Connections”.
3. Set the range
Press [Range] to select a range for the measurement. You can also use the,, andkeys on the front panel to select the range. Auto
(auto range) automatically selects the range for the measurement basedon the input. Auto ranging is convenient, but it results in slower
measurements than using a manual range. Auto ranging goes up a range at
110% of the present range, and down a range below 10% of the present
range.

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4. Set the filter
Press [Filter] and choose the filter for the measurement. The instrument
provides three different AC filters --”>3Hz”, “>20Hz” and “>200Hz”. You
should generally select the highest frequency filter whose frequency is lessthan that of the signal you are measuring,
5. Set the relative value (Optional operation)
Press [Rel] to open or close Relative math function. When it is opened, thereading displayed is a value which comes from the result of actual
measurement value subtracts the relative value that has been set. The
default relative value is the measurement value when the function is opened.
(Please refer to “Math Functions” in Chapter 2 to know about the details.)
6. Read the measurement value
The multimeter measures the input signal according to the current
measurement settings and displays the measurement result on the screen.
7. Make math operation (advanced)
You can perform math operation (Statistics, Limit, dBm, dB and REL) on every
ACV measurement reading. For details, please refer to “Math Operations”.
8. Display the graph (advanced)
You can analyze the measurement data by using “Bar Meter”, “Trend Char” or“Histogram display”. For details, please refer to “Display Mode”.

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To Measure AC Current

Range: 200μA, 2 mA, 20 mA, 200 mA, 2A, 10A
Max Resolution: 0.1nA (in the range of 200μA)
Input Protection: a 10A protection is available in all ranges and a 10%
overrange for all ranges except 10A range. If the reading exceeds therange, “overload” will be displayed.

Operating Steps:
1. Enable the ACI measurement
Press
and
on the front panel to enter the AC current
measurement interface, as shown in Diagram 2- 12.

Diagram 2-12 AC Current Measurement Interface
2. Make connection
Connect the test leads with the measured signal by referring to “Measurement
Connections”.
3. Set the range
Press [Range] to select a range for the measurement. You can also use the,, andkeys on the front panel to select the range. Auto (autorange) automatically selects the range for the measurement based on the
input. Auto ranging is convenient, but it results in slower measurements
than using a manual range. Auto ranging goes up a range at 110% of thepresent range, and down a range below 10% of the present range.

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4. Set the filter
Press [Filter] and choose the filter for the measurement. The instrument
provides three different AC filters --”>3Hz”, “>20Hz” and “>200Hz”. You should
generally select the highest frequency filter whose frequency is less than thatof the signal you are measuring,
5. Set the relative value (Optional operation)
Press [Rel] to open or close Relative math function. When it is opened, thereading displayed is a value which comes from the result of actual
measurement value subtracts the relative value that has been set. The
default relative value is the measurement value when the function is opened.
(Please refer to “Math Functions” in Chapter 2 to know about the details.)
6. Read the measurement value
The multimeter measures the input signal according to the current
measurement settings and displays the measurement result on the screen.
7. Make math operation (advanced)
You can perform math operation (Statistics, Limit and REL) on every ACI
measurement reading. For details, please refer to “Math Operations”.
8. Display the graph (advanced)
You can analyze the measurement data by using “Bar Meter”, “Trend Char” or“Histogram display”. For details, please refer to “Display Mode”.

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To Measure ResistanceRange: 200Ω, 2kΩ, 20kΩ, 200kΩ, 1MΩ, 10MΩ, 100MΩ
Max Resolution: 100μΩ (in the range of 200Ω)
Input Protection: a 1000 V protection is available in all ranges and a 10%
overrange for all ranges. If the reading exceeds the range, “overload”
will be displayed.

SDM3065X provides 2-wire and 4-wire resistance measurements. When themeasured resistance is lower than 100 KΩ, the 4-wire resistance measurement isrecommended to reduce the measurement error caused by test lead resistanceand contact resistance between the probe and the testing point because these
two resistances cannot be ignored any more, compared to the measured
resistance.

Operating Steps:

1. Enable 2-wire / 4-wire resistance measurement
Press
on
the
front panel toenter the2-wireresistance measurement interface, as shown in Diagram 2- 13.

Diagram 2-13 2 Wire Resistance Measurement Interface

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Press
and
on the front panel to enter the 4-wire resistancemeasurement interface, as shown in Diagram 2- 14.

Diagram 2-14 4 Wire Resistance Measurement Interface

2. Make connection
Connect the test leads with the measured signal by referring to“Measurement Connections”.
3. Set the range
Press [Range] to select a range for the measurement. You can also use the,, andkeys on the front panel to select the range. Auto
(auto range) automatically selects the range for the measurement basedon the input. Auto ranging is convenient, but it results in slower
measurements than using a manual range. Auto ranging goes up a range at
110% of the present range, and down a range below 10% of the present
range.
4. Set the integration
Press [Aperture] and choose the number of power-line cycles (PLCs) to use
for the measurement. Selecting 100 PLC provides the best noise rejection
and resolution, but the slowest measurements
5. Autozero setting
Press [Auto Zero] to enable or disable this function. Autozero provides themost accurate measurements, but requires additional time to perform thezero measurement. With autozero enabled (On), the DMM internallymeasures the offset following each measurement. It then subtracts thatmeasurement from the preceding reading. This prevents offset voltages
present on the DMM’s input circuitry from affecting measurement accuracy.

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6. Set the relative value (Optional operation)
Press [Rel] to open or close Relative math function. When it is opened, thereading displayed is a value which comes from the result of actual
measurement value subtracts the relative value that has been set. The
default relative value is the measurement value when the function is opened.
(Please refer to “Math Functions” in Chapter 2 to know about the details.)
7. Read the measurement value
The multimeter measures the input signal according to the current
measurement settings and displays the measurement result on the screen.
8. Make math operation (advanced)
You can perform math operation (Statistics, Limit and REL) on every
resistance measurement reading. For details, please refer to “MathOperations”.
9. Display the graph (advanced)
You can analyze the measurement data by using “Bar Meter”, “Trend
Char” or “Histogram display”. For details, please refer to “Display Mode”.

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To Measure CapacitanceRange: 2nF, 20nF, 200nF, 2μF, 20μF, 200μF, 2mF, 20mF, 100mF
Max Resolution: 1pF (in the range of 2nF)
Input Protection: a 1000 V protection is available in all ranges. If thereading exceeds the range, “overload” will be displayed.

Operating Steps:

1. Enable the Capacitance measurementPresson the front panel to enter the Capacitance measurement
interface, as shown in Diagram 2- 15.

Diagram 2-15 Capacitance Measurement Interface
2. Make connection
Connect the test leads with the measured signal by referring to“Measurement Connections”.
3. Set the range
Press [Range] to select a range for the measurement. You can also use the,, andkeys on the front panel to select the range. Auto
(auto range) automatically selects the range for the measurement basedon the input. Auto ranging is convenient, but it results in slower
measurements than using a manual range. Auto ranging goes up a range at
110% of the present range, and down a range below 10% of the present
range.

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4. Set the relative value (Optional operation)
Press [Rel] to open or close Relative math function. When it is opened, thereading displayed is a value which comes from the result of actual
measurement value subtracts the relative value that has been set. The
default relative value is the measurement value when the function is opened.
(Please refer to “Math Functions” in Chapter 2 to know about the details.)
5. Read the measurement value
The multimeter measures the input signal according to the current
measurement settings and displays the measurement result on the screen.
6. Make math operation (advanced)
You can perform math operation (Statistics, Limit and REL) on every ACI
measurement reading. For details, please refer to “Math Operations”.
7. Display the graph (advanced)
You can analyze the measurement data by using “Bar Meter”, “Trend Char”
or “Histogram display”. For details, please refer to “Display Mode”.

NOTE：
Please short contact the two feet of an electrolytic capacitor by using a test
lead before measuring the electrolytic capacitor.

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To Measure Frequency or Period

Frequency (Period) Range: From 3 Hz to 1MHz (from 0.33s to 1μs)
Input Signal Range: 200mV, 2V, 20V, 200V, 750V
Input Protection: a 750 V protection is available in all ranges.

Operating Steps:

1. Enable the Freq/Period measurement
Press
and
on the front panel, then select [Freq] to enter thefrequency measurement interface, as shown in Diagram 2- 16.

Diagram 2-16 Fequency Measurement Interface
Select [Period] to enter the period measurement interface, as shown in
Diagram 2-17.

Diagram 2-17 Period Measurement Interface

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2. Make connection
Connect the test leads with the measured signal by referring to“Measurement Connections”.
3. Set the range
Press [Range] to select a range for the measurement. You can also use the,, andkeys on the front panel to select the range. Auto
(auto range) automatically selects the range for the measurement basedon the input. Auto ranging is convenient, but it results in slower
measurements than using a manual range. Auto ranging goes up a range at
110% of the present range, and down a range below 10% of the present
range.
4. Set the gate time
Press [Gate Time] and choose the measurement aperture of 1 ms, 10 ms,
100 ms (default), or 1 s.
5. Set the relative value (Optional operation)
Press [Rel] to open or close Relative math function. When it is opened, thereading displayed is a value which comes from the result of actual
measurement value subtracts the relative value that has been set. The
default relative value is the measurement value when the function is opened.
(Please refer to “Math Functions” in Chapter 2 to know about the details.)
6. Read the measurement value
The multimeter measures the input signal according to the current
measurement settings and displays the measurement result on the screen.
7. Make math operation (advanced)
You can perform math operation ( Statistics, Limit and REL) on every
measurement reading. For details, please refer to “Math Operations”.
8. Display the graph (advanced)
You can analyze the measurement data by using “Bar Meter”, “Trend Char”
or “Histogram display”. For details, please refer to “Display Mode”.

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To Test Continuity

Test Current Source: 1mA
Max Resolution: 0.01Ω
Input Protection: 1000V Input Protection
Open-circuit Voltage: <8V
Beep Threshold (short-circuit resistance) ：from 0Ω to 2000Ω

This function measures the resistance of the circuit with about 1mA curren
source. When the measured resistance is lower than the short-circuit resistance( Threshold), the beeper sounds (if the Beeper is on). Otherwise, “open” isdisplayed on the screen

Operating Steps:
1. Enable the Continuity measurementPresson the front panel to enter the Continuity test interface, as
shown in Diagram 2- 18.

Diagram 2-18 Continuity Measurement Interface
2. Make connection
Connect the test leads with the measured signal by referring to“Measurement Connections”.
3. Set the short-circuit resistance (Threshold)Enter a desired value using the direction keys. The range is from 0 Ω to2000 Ω and the default is 50 Ω.

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4. Read the measurement value
The multimeter measures the input signal according to the current
measurement settings and displays the measurement result on the screen.
5. Make math operation (advanced)
You can perform math operation (Statistics, Limit) on every measurement
reading. For details, please refer to “Math Operations”.
6. Display the graph (advanced)
You can analyze the measurement data by using “Bar Meter”, “Trend Char”
or “Histogram display”. For details, please refer to “Display Mode”.

NOTE:
Before testing continuity, please cut off the power and discharge all the highvoltage containers to avoid damages to the Multimeter.

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To Test Diode

Test Current Source:1mA
Voltage Measurement Range:0V~4V
Max Resolution:10μV
Input Protection: 1000V Input Protection
Open-circuit Voltage:<8V

This function measures the forward voltage drop on the diode. When thevoltage is lower than Threshold, the beeper sounds (if the beeper is on).

Operating Steps:

1. Enable the Diode measurement
Press
and
on the front panel to enter the Diode test interface, as
shown in Diagram 2- 19.

Diagram 2-19 Diode Measurement Interface
2. Make connection
Connect the test leads with the measured signal by referring to “Measurement
Connections”.
3. Set the Threshold
Enter a desired value using the direction keys. The range is from 0 to 4V and thedefault is 2V.
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4. Read the measurement value
The multimeter measures the input signal according to the current
measurement settings and displays the measurement result on the screen. If
the reading exceeds the threshold, “open” will be displayed.
5. Evaluate the results of measurement
Reverse the probes and measure the forward voltage drop on the diodeagain. Evaluate the diode according to the following rules:⚫
⚫
⚫

If the Multimeter displays “open” when in reverse bias model, it indicates thatthe diode is normal.
If the Multimeter shows voltage about 0V and the instrument beeps
persistently when in forward and reverse bias model, it indicates that thediode is short.
If the Multimeter shows “open” when in forward and reverse model, it
indicates that the diode is open.

6. Make math operation (advanced)
You can perform math operation (Statistics, Limit) on every measurement
reading. For details, please refer to “Math Operations”.

7. Display the graph (advanced)
You can analyze the measurement data by using “Bar Meter”, “Trend Char”
or “Histogram display”. For details, please refer to “Display Mode”.

Note:
Before testing diode, please cut off the power and discharge all the highvoltage containers to avoid damages to the Multimeter.

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To Measure Temperature
SDM3065X can directly measure the temperature using TC ( Thermocouple)
and THERM (Thermistor) sensors.
Operating Steps:
1. Enable the Diode measurementPresson the front panel to enter the Temperature measurement
interface, as shown in Diagram 2- 20.

Diagram 2-20 Temperature Measurement Interface
2. Make connection
Connect the test leads with the measured signal by referring to“Measurement Connections”.
3. Set the type of sensor
Press [Load] and use direction keys to choose a desired temperature
sensor. Press [Define] to view the configurations. Then press [Read] to apply
the current temperature sensor configurations.

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4. Set the display mode
Press [Display] to choose the display mode. The Multimeter supports three
display modes: Temperature Value, Measured Value and All (Temperature
Value and Measured Value will be shown on the display together).

Diagram 2-22 Choose Display Mode of Temperature Measurement

5. Set the unit of temperture
Press [Units] to choose the unit of temperature. The Multimeter supports
three units: °C, °F, K.

Diagram 2-23 Unit Selection Interface
6. Set the relative value (Optional operation)
Press [Rel] to open or close Relative math function. When it is opened, thereading displayed is a value which comes from the result of actual
measurement value subtracts the relative value that has been set. The
default relative value is the measurement value when the function is opened.
(Please refer to “Math Functions” in Chapter 2 to know about the details.)

7. Read the measurement value

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The multimeter measures the input signal according to the current
measurement settings and displays the measurement result on the screen.
8. Make math operation (advanced)
You can perform math operation ( Statistics, Limit and REL) on every
measurement reading. For details, please refer to “Math Operations”.
9. Display the graph (advanced)
You can analyze the measurement data by using “Bar Meter”, “Trend Char”
or “Histogram display”. For details, please refer to “Display Mode”.

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SDM3065X Series Digital Multimeter User ManualDual-display Function
The Dual-display function is used to turn on two basic measurement functions,and observe the two measurement results at the same time, thus improve thetest and measurement functions. For available combinations of Dual-display,refer to the following table.
Table 2-3 Available combination of Dual-display (letters in brackets correspond to
Diagram 2-25 wiring example)
Correspond toMain Display Function
Diagram 2-25 wiring DCV DCI ACV ACI FREQ PERIOD 2-Wire 4-Wire Cap
exampleRR
DCV(b) (a)(1) (b)DCI(a)(1) (c) (a)(1) (c)ACV(b) (a)(1) (b)

(a)

(b)

(b)

(a)

(a)

(c)

(a)

(a)

(b)

(a)

(b)

(b)

(a)

ACI
Vice
Display
FREQ
Function
PERIOD(c)(a)

2-Wire R
4-Wire R(b)(b)(2)(d)(b)(3)Cap

Remarks:(1) Because connection (a) reverses the polarity of current line, DCI measurementshows its negative value.
(2) At this time, connection (b) is not connected to power source, and "load" is themeasured resistance.
(3) In this case, connection (b) is not connected to power source, and "load" is themeasured capacitance.
Operating Steps:
1. Enable the Dual-display function
First press a function key on the front panel to open the main display
function, and then press,the upper right corner will show “Dual”. By thistime, press another function key to open the vice display function to complete theactivation. When enabled, press
to switch the Main / Vice Display
Function. If you need to exit dual function, just press the front panel to enter any
function.
Take the Main Display DCV and the Vice Display DCI as an example, press

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,

,

, and

.

Diagram 2-24 Dual-display function Interface (Main DCV, Vice DCI)
2. Make connection
Connect the test leads with the measured signal by referring to“Measurement Connections”. As shown in the Diagram below, power source
refers to connecting DC / AC power or not.

Diagram 2-25 Dual-display wiring example
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3. Instruction:(1) If the same measurement function is used in both Main and Vice Display.
⚫
⚫
⚫

The readings in both of the display will update at the same time.
If math function (dBm, dB) is used in Main Display, when opening Vice
Display, math operation will be closed automatically and Vice Display willshow the same measurement result as Main Display.
If math function (Statistics, Limits, Relative) is used in Main Display, when
opening Vice Display, the result will still be shown in Main Display and Vice
Display will show the same measurement result as Main Display.

(2) If different measurement functions are used in both Main and Vice Display.
⚫
⚫
⚫

The readings in both of the display will update alternately.
If math function (dBm, dB) is used in Main Display, when opening Vice
Display, math operation will be closed automatically and Vice Display willshow the second selected function normally.
If math function (Statistics, Limits, Relative) is used in Main Display, when
opening Vice Display, the result will still be shown in Main Display and Vice
Display will show the second selected function normally.

(3) If Temperature function is used in Main Display, set the display mode (→ [Display] → [All]). Then the result will be shown in Main Display and thecurrent measurement value is shown in Vice Display.
(4) Auto Range is adopted by Vice Display. If the same measurement function isused in both the display, so does the range.
(5) Measured data in Vice Display cannot be saved into “History”.

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Utility Function
The Utility function enables users to set up system parameters, interface
parameters of the multimeters.

Press
and
to enter the operating menu of Utility function, as thefollowing diagram shows.

Diagram 2-26 Utility Function Configuration Interface

Table 2-4 Utility Function Menu Description
Function Menu Description
Store/Recall
Store or recall state files.
Manage File
Create a new file, copy, rename or delete a file.
I/O Config
Configure LAN and GPIB interface.
Test/Admin
Provide board test function.
System Setup
Configure instrument’s user settings.

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Store and Recall

The Store/Recall function enables users to store and recall the instrument
state and data files in the local storage as well as in USB storage. After
entering into the function menu of Utility, press [Store/Recall] to enter theinterface as shown in diagram 2-27.

Diagram 2-27 Store and Recall Interface

Table 2-5 Store/Recall Function Menu Description
Function Menu Description
Store Settings
Store state or data files.
Recall Settings
Recall state files.
Power On
Select the state that is loaded at power-up.
Delete all the files stored in local storage andSecurity Ercase restore the instrument to factory default state.
Set to Defaults
Done

Restore the instrument to factory default state.
Return to the higher-level menu.

Store Settings

Store settings allows you to save the system configuration (in the formof .xml) or measurement data (in the form of .csv) into the internal memory or
an external USB storage device. After entering into the function menu ofStore/Recall, press [Store Settings] to enter the following interface.

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Diagram 2-28 Store Settings Interface
Table 2-6 Storage Function Menu Description
Function Menu Settings
Description
BrowseChoose the location that file will be saved.
File Name
Input the file name.
Type.xml / .csv
Choose the type of file that will be saved.
Store DataStore the specified file.
Done
Return to the higher-level menu.

Operating Steps:

1. Set the storage directory
Press [Browse] to enter the following interface, then use direction keys ormenu operation keys to choose the storage directory. Press [Select] to set
the current directory as storage location and Return to higher-level menu.

Diagram 2-29 storage directory Settings Interface

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2. Set the file namePress [File Name] to enter the following interface and input the name of thestored file.

Diagram 2-30 Input Fire name
The method of inputting file name:
⚫
⚫
⚫
⚫
⚫
⚫
⚫
⚫

Press direction keys to select a desired char in the input area.
Press “OK” key on the front panel to input selected char in the input area.
Press [Clear All] to clear all input chars.
Press [Delete Char] to delete the letter on which the cursor taking place.
Press [Previous Char] to move the cursor in the file name area to theprevious char.
Press [Next Char] to move the cursor in the file name area to the next char.
Press [Done] to save the current file and return to the higher-level menu.
Press [Cancel] to cancel the current operation and return to the higherlevel menu.

.
3. Set the type of stored file
Press [Type] to set the type of stored file.
⚫
⚫

xml: save the current system configuration as an “.xml” file.
csv: save the current measurement result as a “.csv” file.

4. Save the file
Press [Store Data] to store the specified file

5. ExitPress [Done] to return to the higher-level menu.

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Recall Settings
Recall settings allows you to read the system configuration from the internal
memory or an external USB storage device. After entering into the function
menu of Store/Recall, press [Recall Settings] to enter the following interface.

Diagram 2-31 Recall Settings Interface
Use direction keys or menu operation keys to choose the state file with the suffix“.xml”. Press [Select] to read the file and restore the instrument to specifiedstate. Press [Cancel] to return to higher-level menu.

Power On
Select a system configuration to be used at power-on from “Default” and “Last”(configuration at last power-off). The setting will be available at the next poweron.
Security Erase
Press [Security Erase], the instrument will display prompt message “Are you
sure to delete all stored files?”. Then press [Yes], the instrument will delete all
the files stored in local storage and restore the instrument to factory default
state.

Set to Defaults
Press [Set to Defaults] the instrument will be restored to factory default state.

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SDM3065X Series Digital Multimeter User ManualManage File

The Manage Files function allows you to create, copy, delete, and rename
files and folders in the instrument's internal flash memory or on a USB drive
attached to the front panel. It also allows you to capture the current screen to abitmap (*.bmp) file. After entering into the function menu of Utility, press[Manage File] to enter the interface as shown in diagram 2-32.

Diagram 2-32 Manage File Interface
Press [Action] and select [Folder], [Capture Display], [Copy],[Rename] or [Delete] to do the corresponding operation.
⚫

Folder - To create a folder, browse to the internal or external location for thefolder, press File Name, enter a folder name and press Done. Press Create
Folder > Done.

⚫

Capture Display- To saves a screen capture, browse to the internal orexternal location for the screen capture, press File Name, enter a name andpress Done. Press Save Screen > Done.

⚫

Copy - To copy a file or folder, press Copy. Browse to the folder or file to becopied and press Select. Press Copy Path and select an internal or external
path for copying. Press Perform Copy > Done.

⚫

Rename - To rename a file or folder, press Rename. Browse to thefolder or file to be renamed and press Select. Press New Name, enter a
new name and press Done. Press Perform Rename > Done.

⚫

Delete - To delete a file or folder, press Delete and Browse to the folder orfile to delete. Press Select >Perform Delete > Done.

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I/O Configuration

Press [I/O Config] to enter the following interface and set up the parameters.

Diagram 2-33 I/O Configuration Interface

LAN Settings

The Multimeter enables users to operate instrument remotely by LAN interface
and store or recall internet settings. You can look over current LAN settings andset up IP address and subnet mask.
After entering into the function menu of Utility, press [I/O Config]. Select [On] →[LAN Settings] → [Modify Settings] to enter the following interface.

Diagram 2-34 LAN Settings Interface

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Table 2-7 LAN Settings
Function
Description
Menu
IP Address Set up IP address.
SubnetSet up subnet mask.
Mask
Gateway
Set up gateway
CancelCancel current operation and return to the higher-level menu.
Done
Save all changes and return to the higher-level menu.

GPIB Settings

Each device on the GPIB (IEEE–488) interface must have a unique address.
The default address is 30 when the instrument is leaving the factory. The
address of Multimeter can be any integral value between 1 and 30.
Operating Steps:
1. After entering into the function menu of I/O configuration, press [GPIB
Settings] to enter the interface shown in diagram 2-35.

Diagram 2-35 GPIB Settings
2. Users can change the value of GPIB address by direction keys.
3. Press [Select] to set the input value as GPIB address and return to thehigher-level menu.

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Board Test

SDM3065X provides self-test functions, including Key Test, LCD Test, Beeper
Test and Chip Test.

Operating Steps:

1. Pressand, then choose [Test/Admin] → [Board Test] to enter
the following interface.

Diagram 2-36 Board Test Interface
Table 2-8 Board Test Function Description
Function Menu
Description
Key
Test the instrument’s keys.
LCD
Test the instrument’s LCD screen.
BeeperTest the instrument’s beeper.
Chip
Test the instrument’s chips.
Done
Return the higher-level menu.

2. Test the keys.
Select [Key] to enter the key test interface, as the Diagram 2-37 shows. The onscreen lathy rectangle shapes represent the keys on the front panel. Test all
keys and knobs and you should also verify that all the backlit buttons illuminate
correctly.

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Diagram 2-37 Key Test Interface

NOTE:⚫ Before you operate, the shapes on the screen display blue color.
⚫ The corresponding area of tested buttons or knobs would display green
color.
⚫ Press [Done] to exit the test.

3. Test the LCD screen.
Select [LCD] to enter the screen test interface, the screen shows the message:“Press ‘Change’ to change Press ‘Done’ to exit”. Press [Change] to start thetest and observe if the screen has severe color or other display error. As the
Diagram 2-38 shows.

Diagram 2-38 LCD Test Interface

NOTE:⚫ Press [Change] to change the color of the screen. There are three colors:
red, blue and green.
⚫ Press [Done] to exit the test.

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4. Test the beeper.
Press [Beeper] to test the beeper. Under regular circumstance, press [Beeper]
one time and the instrument will beep one time.
5. Test the chips.
Press [Chip] → [Start] to enter chip test interface, as Diagram 2-39 shows.

Diagram 2-39 Chip Test Interface

NOTE:⚫ If the test is passed, the corresponding result shows “pass”.
⚫ If the test is failed, the corresponding result shows “fail”.

6. Press [Done] to exit the board test.

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SDM3065X Series Digital Multimeter User ManualFirmware Update

The software of the Multimeter can be updated directly via USB flash drive,
updating current software version to desired software version.
Operating Steps:
1. Copy the update file to the USB flash drive.
2. Insert USB flash drive to USB host interface on the front panel of theMultimeter.
3. Press→→ [System Setup] → [Firmware Update], then press[Browse] and select the update file. Next, press [Update] → [Yes] to start
updating the system software.
4. After accomplishing update, the screen shows message:“Firmware Update Done!” Then you can move the USB flash driveaway.
5. Restart the Multimeter and check the version information.
Press→→ [System Setup] → [System Info] to check if thesoftware and hardware version after updating is in accordance with thedesired version. If not, the updating is failed and you need update once
more as the above steps.
6. After checking, press [Done] to exit the system information interface.

NOTE:⚫ Don’t cut off the power during the instrument is updating

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System Setup

Press
interface.

and, then select [System Setup] to enter the following

Diagram 2-40 System Setup Interface
Table 2-9 System Settings Menu Description
Function Menu
Description
Language
Select the display interface language.
Firmware Update Update software version,
ScreenSet up the screen protection function.
System Info
View system information.
Done
Return to the higher-level menu.

1. Select language.
The Multimeter supports two kinds of languages, English and Chinese. Press[Language] to select the Language of the menu.
2. Set up the time of screen protection.
Press [Screen] to set screen protection as 1 Min, 5 Mins, 15 Mins, 30 Mins,
1 Hour, 2 Hours or 5 Hours according to different demands. Activate the screen
saver program and screen saver will be on if no action is taken within the timethat you have selected. Press any button the resume.
3. View system information.
Press [System Info] to view system information, including startup times, software
version, hardware version, production ID and serial number, as shown in thefollowing diagram.

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Diagram 2-41 System Information

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AcquireSampling is a process of acquiring and digitizing signal. The optional Trigger
methods of the Multimeter include Auto Trigger, Single Trigger and External
Trigger.

Press

to enter the interface shown as the following diagram:

Diagram 2-42 Acquire Interface
Table 2-10 Function Menu of triggering parameter
Function Menu Description
Trg Src
Set the source of trigger.
Slope
Set the slope polarity of external trigger.
Delay
Set the delay.
Samples/Trigger Set the number of samples or trigger.
Set the polarity of output pulse signal when sampling
VMC Out
signal is finished.

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Auto Trigger

Auto Trigger parameters that need to be set up include delay, samples/trigger and VMC out.

Operating Steps:

1. Press, then select [Trg Src] → [Auto] or press
panel directly to enable Auto Trigger.

on the front

2. Set the delay.
Delay is the waiting time after the trigger signal is sent out and before theacquiring starts. Press [Delay] to select Auto or Manual mode. When choosing
Manual mode. Left and Right keys are used to switch the number of anumerical value, Up and Down keys are used to change the selected value.

3. Set the number of samples or trigger.
Press [Samples/Trigger] to set the sample count. Left and Right keys areused to switch the number of a numerical value, Up and Down keys areused to change the selected value.
Sample Count⚫ Sample Count indicates the count of point sampled while the Multimeter
getting a signal of Single Trigger.
⚫ The range of sampling point should be between 1 and 599999999.
⚫ The default value of Sample Count is 1.

4. Set the VMC Out.
The Multimeter output a pulse signal through the VM COMP interface on therear panel after sampling signal is finished Press [VMC Out] to choose Positive
or Negative polarity.

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SDM3065X Series Digital Multimeter User ManualSingle Trigger

Single Trigger parameters that need to be set up include delay, samples/trigger and VMC out.

Operating Steps:

1. Press, then select [Trg Src] → [Single] or press
panel directly to enable Single Trigger.

on the front

2. Set the delay.
Press [Delay] to select Auto or Manual mode.
3. Set the number of samples or trigger.
Press [Samples/Trigger] to set sample count.
4. Set the VMC Out.
The Multimeter output a pulse signal through the VM COMP interface on therear panel after sampling signal is finished.
Press [VMC Out] to choose Positive or Negative polarity.

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External Trigger

The external trigger signal will be input via EXT TRIG interface on the rear
panel. External trigger parameters that need to be set up include delay, samples/trigger, slope and VMC out.

Operating Steps:
1. Press, then select [Trg Src] → [Ext] enable External Trigger.

2. Set the polarity of slope.
Press [Slope] to choose Positive or Negative polarity.

3. Set the delay.
Press [Delay] to choose Auto or Manual mode.

4. Set the number of samples or trigger.
Press [Samples/Trigger] to set sample count.

5. Set the VMC Out.
In External Trigger mode, the Multimeter could output a pulse signal throughthe VM COMP interface on the rear panel after sampling signal is finished.

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Help System
SDM3065X provides powerful built-in help system. You can recall help
information at any time during using the instrument. You also can get aparticularly help for every button on the front panel or menu softkey by using thebuilt-in help system. Or you can get help about familiar operations with thehelp list.

Press

and

to enter the help list, as the following diagram shows.

Diagram 2-43 Help Menu
Table 2-11Help System Operating Menu
Function Description
Menu
Up
Down
SelectDone

Move up the cursor and select the help menu.
Move down the cursor and select the help menu.
Select the help information you want and read it.
Return to the higher menu.

1. Basic Measure.
Get basic measurement types and methods to connect the leads in different
measurements.

2. Measuring Temperature.
Get the method to measure temperature.

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3. Measuring Capacitance.
Get the method to measure temperature.

4. Math Function.
Introduce how to use the math function while you are measuring.

5. Dual-display Function.
Get the method to use the dual-display function while you are measuring.

6. Saving and Recalling Information.
Introduce how to store and recall the data/parameter/ sensors files.

7. Optional Multiple Scan Card.
Get help about operating optional multiple scan cards.

8. The convention and Tips of Softkeys.
Get help about the convention and tips of softkeys.

9. Technical Support.
Get the method to obtain technical support.

Explanation:⚫ In the help menu interface, you also can move cursor and select thecorresponding menu by up and down direction keys and press “OK” toread the help information.
⚫ While reading help information, you also can look up and down theinformation by up and down direction keys.

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SDM3065X Series Digital Multimeter User ManualMath Function
The Multimeter provides five math functions: Statistics, Limits, dBm, dB and
Relative. Choose different math functions to meet different measurement
demands. Math functions can only be used in DC Voltage, AC Voltage, DC
Current, AC Current, Resistance, Frequency, Period and Temperature
measurement. Among these functions, dBm and dB are only used in DC Voltage
and AC Voltage measurement.
Press
to show the operating menu of math functions on the screen, as
shown in the following diagram.

Diagram 2-44 Math Function Menu
Table 2-12 Math Function Menu Description
Function Settings
Description
Menu
Reading statistic functions, including: max, min,Statistics
average, span, std dev and samples.
The Limits function
performs
Pass/Fail
Limitstesting according to the specified upper andlower limits.
The dBm is based on a calculation of power delivereddBm
to a reference resistance, 0dBm = 1mW.
The dB measurement is the difference between thedB
input signal and a stored relative value.
Turn on the relative value function and set up theRel Value Value/Off
value. Or turn off the function.

Explanations:⚫ Math function can only be applicable to the main display.
⚫ If measurement function is changed, all math functions will be closed
except Statistics.

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Statistics

There are many kinds of reading statistic functions, including: Max, Min,
Average, Standard deviation and so on.

Press
diagram.

→ [Statistics] → [Show] to enter the interface shown in the following

Diagram 2-45 Statistics
Table 2-13 Statistic Measurement Menu Function Description
Function Settings
Description
MenuShow the minimum statistics value of currentMin
measurement.
Show the average statistics value of current
Averagemeasurement.
Show the maximum statistics value of currentMaxmeasurement.
SpanShow the span of current measurement.
Show the std dev statistics value of current
Std dev
measurement.
Show the maximum statistics value of current
Samplesmeasurement.
Statistics
Show/Hide Show or hide the statistics function interface.
Clear
Readings
Clear all current readings and restart statistics.
Done
Return to the higher-level menu.

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Statistics Function:
In statistic function, the first reading is usually set to the maximum or
minimum value. When getting more readings, current displaying value is always
the maximum/minimum reading among all the measured values.
The maximum, minimum, average and reading quantities are stored involatile memory.

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LimitsLimits function is available to prompt signals beyond ranges according to theupper and lower parameters. Following are some measurement functions which
are able to do limit operation: DC Voltage, AC Voltage, DC Current, AC Current,
Resistance, Frequency, Period, Capacitance and Temperature.

Press
diagram.

→ [Limits] → [On] to enter the interface shown in the following

Diagram 2-46 Limits
Table 2-14 Limits Measurement Menu Function Description
Function Settings Description
Menu
Limits
On/OffTurn on or turn off the Limits function.
Low
Set the desired lower limit.
Center
Set the desired center valueHigh
Set the desired upper limit.
StatusShow the status of limit test.
Low
FailuresShow the times that reading is lower than the limit.
High
FailuresShow the times that reading is higher than the limit.
Span
Set the desired span.
When the beeper is on, if the reading is lower or
BeeperOn/Offhigher than limits, the instrument will beep once.
Clear
Condition
Clear all current readings and restart to test.
Done
Save all changes and return to the higher-level menu.

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1. How to Set Limits
Select [High], [Low], [Center] or [Span] and then switch to the needed digit by
Left or Right Direction keys and input numerical value by Up and Down Direction
keys.

2. Unit
The unit of Limits is decided by the current measurement function.

3. Over hint⚫
⚫
⚫

When the reading is lower than the set lower limit, the color of main display
will switch blue to red.
When the reading is higher than the set higher limit, the color of main display
will switch blue to red.
When the reading is lower or higher than the set limits, the Beeper will beep
once. (The beeper is turned on.)The range of Limits function:⚫ The Limits range is -120% ~ +120% of the current measurement range.
⚫ The upper limit value should be always bigger than the lower limit
value.
⚫ The upper and lower values are stored in volatile memory. They will be set todefault values when the power is on.

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SDM3065X Series Digital Multimeter User ManualdBm

The dBm function is logarithmic and based on a calculation of power delivered toa reference resistance, relative to 1 mill watt. Besides,this function only
applies to AC voltage and DC voltage measurements.

Press→ [dB/dBm] → [On] and select [Function dBm] to enter theinterface shown in the following diagram.

Diagram 2-47 dBm Function Interface
Table 2-15 dB Measurement Function Menu Function Description
Function Settings Description
Menu
dB/dBmOn/OffTurn on or turn off dB or dBm function.
FunctionOpen dBm function and the lower right corner of thedBmmain display show “dBm”.
Ref R
Set the parameter via direction keys: 50Ω ~ 8000Ω.
Done
Save all changes and return to the higher-level menu.

The computation method of the dBm:
When dBm function is turned on, the measured value of voltage is transformed
into dBm according to the following formula.
dBm = 10 x Log10 [(Reading2 / RREF) / 0.001W]

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SDM3065X Series Digital Multimeter User ManualdB
Each dB measurement is different between the input signal and a stored
relative value, with both values converted to dBm. The dB function applies to
AC voltage and DC voltage measurements only.
Press→ [dB/dBm On] and select [Function dB] to enter the interface
shown in the following diagram.

Diagram 2-48 dB Function Interface
Table 2-16 dB Measurement Function Menu Function Description
Function Settings
Description
Menu
dB/dBmOn/OffTurn on or turn off dB or dBm function.
Function dB
Open dB function and the lower right corner of themain display show “dB”.
Ref R
Set the parameter via direction keys: 50Ω ~ 8000Ω.
dB RefValue
Set the referred value of dB.
MeasureRef Value
Set the referred value of measurement.
Done
Save all changes and return to the higher-level menu.
The computation method of the dB:
2dB = 10 x Log10 [(Reading / RREF) / 0.001W] – (dB setting value)
RREF expressed measuring the resistance value in the actual electric circuit.
Range of the dB setting value: -200 dBm ~ +200 dBm. The default is 0 dBm.
dB value:⚫ Input a value in dB setting interface by direction button, and then store it as
dB setting value.
⚫ Settings of dB value are stored in volatile memory.

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Relative Value

Relative value is used for relative measurement. Actual measurement reading isthe depression between measurement value and preset value.

The Multimeter allows operating for the following parameters: DC Voltage, AC
Voltage, DC Current, AC Current, Resistance, Frequency, Period, Capacitanceand Temperature.

Press
diagram.

→ [Rel Value] to enter the interface shown in the following

Diagram 2-49 Relative Operation
Table 2-17 Rel Value Operation Function Menu
Function Description
Menu
Value
Select current measurement value as preset value.
Off
Turn off the relative operation function.

When Rel Value function is turned on, the result of relative measurement willshow on the screen.
Main display = Measurement value – Preset value

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Display Mode
The Multimeter supports four types of way to view measured data: “Number”,“Bar Meter” “Trend Chart” and “Histogram”.

NumberPress
andto open the menu of display mode and press [Display] toenter the following interface. “Number” is always the selected mode when theMultimeter is turned on.

Diagram 2-50 Number Display Mode

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Bar Meter
Operating Steps:
1.

Press [Bar Meter] to enter Bar Meter display mode.

Diagram 2-51 Bar Meter Display Mode
2.

Press [Horizontal Scale] to choose the way to set the vertical scale as
Default or Manual mode.

Table 2-18 To Set the Vertical Scale of Bar Meter manuallyFunction Menu Description
Low
Set the low value of horizontal scale.
High
Set the high value of horizontal scale.
Center
Set the center value of horizontal scale.
Span
Set the span of horizontal scale.
Done
Save all changes and return to the higher-level menu.

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Trend Chart
Operating Steps:
1.

Press [Trend Chart] to enter Trend Chart display mode.

Diagram 2-52 Trend Chart Display Mode
Table 2-19 Trend Chart Display Mode
Function Menu Description
Display
Trend
Currently selected display mode is Trend Chart.
RecentAll
Show recent or all readings.
Horizontal Scale Choose the mode of Horizontal Scale.
Autoscale Once Automatically set the horizontal scale once.
Clear Readings Clear all current readings and restart statistics.
2.

Press [Horizontal Scale] to choose the way to set the horizontal scale as
Default, Auto or Manual mode.
Press [Auto] and the Multimeter will set the vertical scale automatically.

Diagram 2-53 Auto Vertical Scale
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Press [Manual] and you can set the vertical scale manually, as thefollowing diagram shows.

Diagram 2-54 Manual Vertical Scale

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Histogram
Operating Steps:
1.

Press [Histogram] to enter Histogram display mode.

Diagram 2-55 Histogram Display Mode
Table 2-20 Histogram Display Mode
Function
Settings Description
Menu
Display
Histogram
Currently selected display mode is Histogram.
Binning
Set Binning as Auto or Manual mode.
Bin SetSet the parameters of Bin.
Cumulative
On/OffTurn on or off Cumulative function.
Clear
Readings
Clear all current readings and restart statistics.

2.

Press [Binning] to choose the way to set Binning as Auto or Manualmode. When in Manual mode, press [Bin Settings] to enter the followinginterface.

Diagram 2-56 Bin Set Interface

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Table 2-21 Bin Set
Function Settings
Menu
Num. Bins
Low
High
CenterSpan
Outer Bins On/Off
Done

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Description
Set the number of Bins, 10, 20, 40, 100, 200 or 400
selected.
Set the low value of horizontal scale.
Set the high value of horizontal scale.
Set the center value of horizontal scale.
Set the span of horizontal scale.
Show the bins beyond the scope or not.
Save all changes and return to the higher-level menu.

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Trigger
The Multimeter supports Trigger function. Pressoron the front
panel to trigger the Multimeter by Auto or Single mode. Auto trigger is considered
as a default when the power is on.

Auto Trigger

Presson the front panel one time and Auto Trigger will be started tocapture continuous readings automatically. By the time, the black field of thescreen will show “● Auto Trigger”. Press
stopped.

again and the trigger isSingle Trigger
Presson the front panel, Single Trigger will be started one time andgenerate an effective reading. By the time, the black field of the screen willshow “● Single Trig”.

Explanation：
In Remote Mode, the black field just above the screen will show “● Imme Trig”.
Press
to switch back to the local mode and the Multimeter will choose
Auto Trigger automatically.

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Hold Measurement Function
Hold Measurement function provides users with a stable reading on the screenof the front panel. When the test leads are put away, the reading is still held on
the screen, which makes users can view measured history data.

Press
and
to open Hold measurement function interface, the black
field just above the screen will show “·Probe Hold”, as shown in the following
diagram.

Diagram 2-57 Hold Measurement Function Interface

Table 2-22 Hold Measurement Function
Function
Settings Description
Menu
Probe Hold
BeeperClear List

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On/OffOn/OffTurn on or off Probe Hold function.
Turn on or off the Beeper.
Clear all current readings and restart to statistics.

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Chapter 3

Measurement Tutorial

True RMS AC Measurement
The AC measurement of the Multimeter has true RMS response. The power
dissipated in a resistor within a time is proportional to the square of themeasured true RMS voltage, independent of wave shape. The instrument canaccurately measure true RMS voltage or current, as long as the wave shapecontains negligible energy above the effective bandwidth.
The AC voltage and AC current functions measure the “AC coupled” true RMS
value, which is to measure the RMS value of the AC component (DC component
is rejected) of the input signal. For sine waves, triangle waves, and squarewaves, the AC and AC+DC values are equal since these waveforms do notcontain a DC offset. See the following table 5-1.
Table 3-1 True RMS AC Measurement of Sine, Triangle and Square waves
Crest Factor
AC+DC RMS
Waveform(C.F.)AC RMS

Non-symmetrical waveforms, such as pulse trains, contain DC voltages which
are rejected by AC coupled true RMS measurements.
An AC coupled true RMS measurement is desirable in situations where you
are measuring small AC signals in the presence of DC offsets. For instance,measuring AC ripple present on DC power supplies. There are situations,however, where you might want to know the AC+DC true RMS value. You candetermine this value by combining results from DC and AC measurements as
the following shows. You should perform the DC measurement using 6.5-digit
mode for best AC rejection.
𝑅𝑀𝑆(𝐴𝐶+𝐷𝐶) = √𝐴𝐶 2 + 𝐷𝐶 2

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Crest Factor Errors (non-sinusoidal
inputs)A common misconception is that "since an ac Multimeter is true RMS, its sine
wave accuracy specifications apply to all waveforms." Actually, the shape of the
input signal can dramatically affect measurement accuracy. A common way todescribe signal wave shapes is “crest factor”. Crest factor is the ratio of the peakvalue to RMS value of a waveform.

Generally speaking, the greater the crest factor, the greater the energy
contained in high frequency harmonics. All Multimeters have errors that are
crest factor dependent. (The crest factor errors do not apply for input signals
below 100Hz.)

You can estimate the measurement error due to signal crest factor as shown
below:
Total Error ＝ Error (Sine wave) + Error (Crest factor) + Error (Bandwidth)
Error (Sine wave): error for sine wave
Error (Crest factor): crest factor additional error.
Error (Bandwidth): estimated bandwidth error as shown below:−𝐶.𝐹.× 𝐹

Bandwidth error = 4𝜋 ×𝐵𝑊 × 100% (% reading)
C.F.: signal crest factor
F: fundamental frequency of pulse
BW: effective bandwidth of the Multimeter

Example:Calculate the approximate measurement error for a pulse train input with a crest
factor of 2 and a fundamental frequency of 20 kHz. For this example, assume
1-year accuracy specifications of the Multimeter: ± (0.05%× reading +0.03%×range).

Total Error = (0.05%×reading+0.03%×range) + (0.05%×range) +(0.8%×reading)= 0.85%×reading + 0.08%×range

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Loading Errors (AC Voltage)
In the AC Voltage function, the input of SDM3065X appears as a 1MΩ
resistance in parallel with 100pF of capacitance. The test lead that you use toconnect signals to the Multimeter will also add additional capacitance andloading. The approximate input resistances of the Multimeter at different
frequencies are listed in the following table.
Table 3-2 Approximate Input Resistances at Different Frequencies
Input Frequency
Input Resistance
100Hz
1kHz
10kHz
100kHz

1MΩ
850kΩ
160kΩ
16kΩ

For low frequencies:−𝑅

𝑆
𝐸𝑟𝑟𝑜𝑟 (%) = 𝑅 +1𝑀Ω× 100%𝑆

For high frequencies:
𝐸𝑟𝑟𝑜𝑟 (%) =1√1 + (2𝜋 × 𝐹 × 𝑅𝑆 ×𝐶𝑚 )− 1 × 100%

F: input frequency
R s: source resistance
Cm: input capacitance (100pF) plus test lead capacitance

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Chapter 4General Troubleshooting

The following is a list of the troubles that you may meet while using theMultimeter and their solutions. Please handle as the corresponding steps when
meeting these troubles. If you still can’t handle them, please contact SIGLENTin time.

1. If the screen of the Multimeter is still dark with nothing displaying afterpressing the power key:(1) Check if the power has been connected correctly.
(2) Check if the main power switch on the back panel has been turned on
already.
(3) Check if the power fuse has blown. Replace it as desired if it has blown.
(4) Restart the Multimeter after all above steps have been done.
(5) If the instrument still can’t start up properly, please contact SIGLENT.

2. The reading doesn’t change when connecting an AC current signal:(1) Check if the test lead has been connected to the current jack or LO jackcorrectly.
(2) Check if the fuse in the current location on the back panel has blown.
(3) Check if the measuring location has switched to the DCI or ACI placecorrectly.
(4) Check if the input is ACI but the measuring location is in DCI place.

3. The reading doesn’t change when connecting a DC current signal:(1) Check if the test lead has been connected to the current jack or LO jackcorrectly.
(2) Check if the fuse in the current location on the back panel has blown.
(3) Check if the measuring location has switched to the DCI or ACI placecorrectly.
(4) Check if the input is DCI but the measuring location is in ACI place.

4. USB Disks can’t be recognized by the instrument.
(1) Check if the USB disk can work properly.
(2) Make sure the used USB disk is of Flash type. The instrument doesn’t
support USB disks of hard disk type.
(3) Check if the capacity of the used USB disk is too large. The Multimeter isrecommended not to use USB disks which exceed 8GB.
(4) After restarting the instrument, insert the USB disk again to inspect.
(5) If you still can’t use the USB disk properly, please contact SIGLENT.

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Chapter 5

Appendix

Appendix A: Accessories Standard
Accessories:◼

A Power Cord that fits the standard of destination country.

◼

Two test leads (black and red)◼

An USB Cable◼

One backup fuse◼

A Quick Start◼

A CD-ROM

NOTE:⚫ We suggest that the length of USB data wire and LAN cable connected tothe instrument should be less than 3m to avoid affecting the productperformance.
⚫ All the accessories are available by contacting your local SIGLENT office.

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Appendix B: Warranty summary
SIGLENT warrants that the products that it manufactures and sells will befree from defects in materials and workmanship for a period of three years fromthe date of shipment from an authorized SIGLENT distributor. If a productproves defective within the respective period, SIGLENT will provide repair or
replacement as described in the complete warranty statement.

To arrange for service or obtain a copy of the complete warranty statement,
please contact your nearest SIGLENT sales and service office. Except asprovided in this summary or the applicable warranty statement, SIGLENT makes
no warranty of any kind, express or implied, including without limitation theimplied warranties of merchantability and fitness for a particular purpose. In no
event shall SIGLENT be liable for indirect, special or consequential damages.

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Appendix C: Contact SIGLENTSIGLENT TECHNOLOGIES CO., LTD.

Address: 3F, NO.4 building, Antongda Industrial Zone, 3rd Liuxian Road, 68th
District, Baoan District, Shenzhen, P.R. China
Tel: +86-755-36615186

Fax: +86-755-3591582

Post Code: 518101

E-mail: sales@siglent.com
https://www.siglent.com

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