SIGLENTSDL1000X Series
Programmable DC Electronic Load

User Manual
E02A

SDL1000X User ManualISIGLENT

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 right to change the specifications and price.
● Information in this publication replaces all previous corresponding publishedmaterial.
● Contents in this manual are not allowed to be copied, extracted or translated
in any form or by any means without SIGLENT’s permission.

SDL1000X User ManualISIGLENT

General Safety Summary
Please review the following safety precautions carefully to avoid personal injury
or damage to this product or any product connected to it. To prevent potential
danger, please use the instrument as specified.
Use the proper power cord
Only use the power cord designed for use with the instrument and authorized
for use with in the local country of interest.
Power supply
AC Input Voltages: 110 V/220 V ± 10%, 50/60Hz.
Use proper fuse
The fuse types: 110 V/220 V: T315 mA/250 V
Make sure to use the correct type of fuse before turning on the instrument.
Do not connect the power cord before replacing the fuse.
Find and fix the root cause of fuse damage before replacing the fuse.
Ground the instrument
The instrument is grounded through the protective terra/Earth conductor of thepower cord. To avoid electric shock, the grounding conductor must beconnected to the earth. Make sure that the instrument is properly grounded
before activating any inputs or outputs.
Observe all terminal ratings
To avoid fire or electric shock, please observe all ratings and symbols on the
instrument. Read this guide carefully to know more details about the ratings
before connection.
Keep proper ventilation
Inadequate ventilation may cause an increase of the internal temperature of the
instrument, which can lead to damage. Please keep proper ventilation andcheck the fan and air-vents regularly when using the instrument.

Operating conditions

SDL1000X User Manual IISIGLENT
Location: Indoor, no direct sunlight, minimal interference and pollution
Relative humidity: < 80%
Altitude: < 2000 m
TemperatuCre: 0 °C to 40 °C
Electrostatic Prevention
Operate in an area that minimizes the potential for electrostatic discharge .
Always ground both the internal and external conductors of cables to releasestatic before connecting.
Do not operate in an explosive atmosphere
To avoid personal injury or damage to instrument, please do not operate in an
explosive atmosphere.
Keep surface of the product clean and dry
Please keep the surface of the product clean and dry.

SDL1000X User Manual

IIISIGLENT

Safety Terms and Symbols
Important terms that may appear on the product and in this manual:
DANGER: Indicates direct injury or hazard that may happen.
WARNING: Indicates potential injury or hazard that may happen.
CAUTION: Indicates potential damage to the instrument or other property that
may happen.
Symbols that may appear on the product:

Hazardous
Voltage

Protective
Earth Terminal

SDL1000X User Manual IV

Warning

Earth
GroundPower
SwitchSIGLENT

SDL1000X Brief Introduction
The SDL1000X series Programmable DC Electronic Load has a 3.5 inch
TFT-LCD display ， a user-friendly interface and superb performance
specifications. Two versions are available: The SDL1020X features an input
range of 150 V/30 A with a total power of 200 W. The SDL1030X has an input
range of with a total power of 300 W. All models have measurement
resolutions of 0.1 mV/0.1 mA，Adjustable current rise time of 0.001 A/s ~ 2.5
A/s，and built-in RS232/USB/LAN communication interfaces. The SDL1000X
also has a standard SCPI communication protocol that can be used with acomputer to create fully automatic testing platforms. The SDL is ideally suitedfor Power, battery, LED, automotive electronics, and aerospace applications.

Main features of the SDL1000X


SDL1020X (Single channel)：DC 150 V/30 A，total power up to 200 W



SDL1030X (Single channel)：DC 150 V/30 A，total power up to 300 W

4 static modes / Dynamic mode：CC/CV/CR/CP

CC Dynamic mode：Continuous, pulsed, toggled

CC Dynamic mode: 25 kHz, CP Dynamic mode: 12.5 kHz, CV Dynamic
mode: 0.5 HzAdjustable current rising speed: 0.001 A/us ~ 2.5 A/us
Min. readback resolution: 0.1 mV, 0.1 mA
Measuring speed of voltage and current: Up to 500 kHz
SDL1000X User Manual

VSIGLENT

100 step list functionOver-current protection, over-power protection , battery, short circuit and
CR-LED test functions



4-wire SENSE compensation modeExternal voltage and current control function

Voltage and current monitoring via 0-10 V analog output



3.5 inch TFT-LCD display，capable of displaying multiple parameters andstates simultaneously

Built-in RS232/USB/LAN communication interface ， USB-GPIB module(optional)
With memory function in case of power-down

OCP, OVP, OPP, OTP and LRV protections



Wave form graphing

Voltage based rise/fall functionVon and Vlatch function

Smart fan control to minimize noiseRemote control and measurement on PC

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SIGLENT

Content
Copyright and Statement I
General Safety Summary II
Safety Terms and Symbols IV
SDL1000X Brief Introduction V
Chapter 1 Start Guide 1
General Inspection 2
The Front Panel 3
The Rear Panel 6
Connect power8
User interface 10
Fuse Replacement 13
Chapter 2 Function and Features 14
Local/Remote Operation Mode 15
Local Operation Mode 15
Remote Operation Mode 15
Static Operation Mode 16
Constant Current (CC) Mode 16
Constant Voltage (CV) Mode 18
Constant Resistance (CR) Mode 21
Constant Power (CP) Mode 23
Dynamic test function 25
Continuous mode 26
Pulse mode 29
Toggle mode 32
OCPT Test Function 35
OPPT Test Function 39
Battery Test Function 43
List Test Function 47
Auto Test Function 51
LED Test Function 55
Waveform Display Function
58
Restore 60
Function of Terminals on the Rear Panel 64
Sense mode 64
External trigger function 65
Voltage fault function 66
Current and voltage monitor 66
Short-circuit monitor 67
Protection Functions 67
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VIISIGLENT
Overvoltage protection (OVP) 67
Overcurrent protection (OCP) 68
Overpower protection (OPP) 68
Over-temperature Protection (OTP) 69
Input Reverse Polarity Protection (RPP) 69
Chapter 3 System Utility Function 70
System70
1.System info 71
2.Interface72
2.Sound 76
3.Language 77
4.Factory Setting 77
5.Upgrade 78
6.BoardTest 78
Config 80
Turn ON/OFF the Sense Function 80
Turn ON/OFF SOF Function 80
Break-Over Volatge 80
Turn ON/OFF Von-Latch Function 80
Set Trigger
81
Set Aver 81
Set EXTC(External Interface) 82
SLMT 87
Limit 88
I_Protect 88
P_Protect 89
Troubleshooting
91
Contact SIGLENT 92

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Chapter 1 Start Guide
In this chapter, we introduce the front panel and display interface of the
SDL1000X, and also tips for how to check and operate the digital load for the
first time.

The main content of Chapter 1 includes:


General Inspection



The front panelThe rear panelConnecting powerUser interface

Output InspectionFuse Replacement

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SIGLENT

Chapter 1 Start Guide

General Inspection
Please check the instrument according to the following steps.
1. Inspect the shipping container.
Keep the shipping container or cushioning material until the contents of theshipment have been completely checked and the instrument has passed bothelectrical and mechanical tests.
The consigner or carrier will be responsible for damage to the instrument
resulting from shipment. SIGLENT will not provide free maintenance orreplacement.

2. Inspect the instrument.
If there are instrument is found damaged, defective or has failed any electricalor mechanical tests, please contact SIGLENT.

3. Check the accessories.
Please check the accessories according to the packing list. If the accessories
are incomplete or damaged, please contact SIGLENT.

SDL1000X User Manual 2Chapter 1 Start Guide

SIGLENTThe Front Panel

3

1

2

5

4

6

7
Figure1: The front panel of the SDL1000X

1. LCDThe load has a 3.5 inch TFT-LCD display which can display systemparameter settings, system output state, wave forms, menu options,prompt messages, etc.
2. Knob
When setting parameters, rotate the knob to increase or decrease thevalue of the digit at the cursor. When browsing setting objects (such as of
the buzzer state, sense, voltage and current protection, store or read files
and switch modes, etc.), rotating the knob can quickly move the cursor or
switch options. Pressing down the knob selects/enters the parameter.

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Chapter 1 Start Guide

3. Function button and power key

Press down the button to enter the constant current mode.
Enter one of the dynamic modes (DYN mode) by pressing the shift button at
the same time.

Press down the button to enter constant voltage (CV) mode.
Enter auxillary (AUX) mode by pressing the shift button at the same time.

Press down the button to enter the constant power (CP)mode. Enter Utility mode by pressing the shift button at the same time.

Press down the button to enter the constant resistance (CR)mode. Enter LED mode by pressing the shift button at the same time

Press down the button to enter the Display mode. Enable thekey lock function by pressing the shift button at the same time.
Press down the button to enter the Restore function

Press down the shift button to access the alternate button
functions like Lock or LED as shown above.

Press down the button to enter the Short function.

SDL1000X User Manual 4Chapter 1 Start Guide

SIGLENTThe right, left, up, and down arrow buttons move the onscreen cursor to select the setting parameter.
0~9Input the number zero to nine using the keypad.

Dot/PeriodEnter

Softkey functions are define by the adjacent on-screen label
4. Input Terminal
Physical input connections to the external circuit and voltage.
5. USB interface
Interface that can be insert USB device and support FAT32 file systemformat.
6. Power key
Turn on or off the instrument.
7. Function key
Used to choose different functions.

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SIGLENT

Chapter 1 Start Guide

The Rear Panel

1

9

10

5 2

3
4

12

11

8

6

7

Figure 2: The rear panel of the SDL1000X

1. Warning message
Warnings about grounding the instrument and other important
information.
2. AC input voltage description
The frequency and voltage of the AC power supply must match thespecification of the fuse.
3. AC power socket
The power plug socket for AC input power.

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Chapter 1 Start Guide

SIGLENT

4. FuseThe specified fuse must be rated for the input voltage (Please referto the “ AC input voltage description”)
5. AC line power selection switch
AC Input Voltage: 110/220 V
6. LAN interface
Connect to the local network (LAN) using a standard RJ45 interface.
7. USB device
Connect the instrument (as a controlled device) to an external
computer/controller via USB.
8. RS232 interface
Connect to the computer via 9-pin RS232 cable.
9. Current detection terminal
Observe the current input to the SDL by connecting the current
detection terminal to a measurement instrument (oscilloscope, DMM) to
analyze the change of input current with respect to time.
10. Voltage detection terminal
Observe the voltage input to the SDL by connecting the voltage
detection terminal to a measurement instrument (oscilloscope, DMM) to
analyze the change of input voltage with respect to time.

11. Sense terminal, External control terminal, PWM output terminal
Select different ports to realize its function
12. FANSDL1000X User Manual

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Chapter 1 Start Guide

Connect power
The SDL1000X supports a variety of AC line power input values. For eachline voltage, the rear panel voltage selector settings are different, as shown intable 1 below.
Table 1: AC input line power specifications
AC power input

Voltage selector
configure

110 VAC ± 10%， 50 ~ 60 Hz

220 VAC ± 10%， 50 ~ 60 Hz

Please connect the power carefully follow the steps below:
1. Check the input power
Make sure that the AC line power to be connected to the instrument
and meets the requirements in Table 1.
2. Check the voltage selector at the rear panel
Make sure that the voltage selector setting at the rear panel of the
instrument matches the actual input voltage.
3. Check the fuse
The specified fuse is installed when the instrument leaves factory.
Please check whether the fuse matches the actual input voltage according
to the "Input Power Requirements" at the rear panel of the instrument.
4. Connect the power
Connect the instrument to AC power supply using the power cord

SDL1000X User Manual 8Chapter 1 Start Guide

SIGLENT

provided in the accessories. Then press the button

to turn on theelectronic load.

WARNING
Before turning the instrument on, please disconnect the power
supply andset the voltage selector to the appropriate value.

WARNINGTo avoid electric shock, make sure that the instrument is correctly
grounded.

SDL1000X User Manual

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Chapter 1 Start Guide

User interface

Figure 3: The user interface of the SDL1000X

1. Channel output mode
2. Channel output state
3. Short state
4. Remote sense mode
5. LAN connection icon
6. USB connection icon
7. Remote mode
8. Keyboard lock

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Chapter 1 Start Guide

SIGLENT

9. Setting value
10. Measured output values
11. Voltage rise and fall time

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Chapter 1 Start Guide

To Power on the instrument
After the instrument is connected to the power source, press the Power key atthe left bottom of the front panel to power on the instrument. When the
instrument is turned on, it will undergo a self-test. If the instrument passes theself-test, the welcome interface is displayed. If the instrument fails, theself-test failure information will be displayed. If you encounter any problems or
failures,please contact your nearst SIGLENT support office.

CAUTION
Ensure that the AC selector setting on the rear panel of the
instrument matches the actual AC input voltage, otherwise, theelectronic load could be damaged.

CAUTION
Please pay attention to the positive and negative polarities of theelectronic load to avoid incorrect connections. Otherwise, the load canbe damaged.

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Fuse Replacement
The specifications of the fuse are relative to the actual input line voltage shownin the table below. You also can refer to the rear panel “input power
requirement”.

Input voltage

Fuse specification

110 VAC

T315mA

220 VAC

T315mATo replace the fuse, please follow the steps below:
1.

Turn off the instrument and remove the power cord.

2.

Insert a small straight screwdriver into the slot at the power socket
and gently pry out the fuse seat.

3.

Adjust the power voltage selector manually to select the correct
voltage scale.

4.

Take out the fuse and replace it with the specified fuse (for thecorresponding relations between the input voltage and fusespecification, refer to the “input power requirement” at the rear
panel).

5.

Re-insert the fuse holder into the power socket (please pay
attention to the direction).

WARNINGTo avoid personal injuries, unplug the power supply before replacing
the fuse. To avoid electric shock or fire, select the proper power supply
specification and replace only with the proper fuse.

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SIGLENT

Chapter 2 Function and Features

Chapter 2 Function and Features
Contents in this chapter:

Local/Remote Operation Mode

Static Operation ModeTransient Test Function

OCPT Test Function

OPPT Test Function

Auto Test Function

LED Test Function

Waveform Display FunctionStore and Recall



Rear Panel Terminal functions

Short monitor functionProtective function

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Local/Remote Operation Mode
The load provides two operation modes: Local and remote.

Local Operation Mode
After you power on the instrument, it enters the local operation mode by default.
In the local operation mode, all the keys on the front panel are available for you
to use.

Remote Operation ModeIn the remote operation mode, you can send programming commands from acontroller (computer) via any one of the interfaces (GPIB, USB, RS232, or LAN).
In remote operation mode, all the keys (except the Shift key plus the Displaykey) will be disabled. This is known as “local lock out”. When locked, theinstrument front panel is disabled and the load can only be controlled via
programming commands. To return to the local operation mode, press the Shift
key plus the Display key on the front panel.

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Chapter 2 Function and Features

Static Operation Mode
The static operation modes include the following 4 modes:Constant Current (CC) Mode
Constant Voltage (CV) Mode
Constant Resistance (CR) Mode
Constant Power (CP) Mode

Constant Current (CC) Mode
In CC mode, the electronic load will sink a current in accordance with theprogrammed value regardless of the input voltage, as shown in Figure 2-1.

Constant Current Mode
Figure 2-1 Voltage-Current Relationship Schema under CC Mode
Operating Steps
1. Turn off the instrument, as shown in Figure 2-2, connect the DUT
and the channel input terminals on the front panel of the load.

Figure 2-2
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Chapter 2 Function and Features

SIGLENTCAUTION

While making a connection, the positive polarity of the load should
be connected to the (+) terminal of the channel output, and thenegative polarity of the load to the (-) terminal of the channel
output. Incorrect polarity may cause damage to the instrument or
the DUT.
2. Press CC to enter the main interface of CC mode, as shown in
Figure 2-3.

3.
Figure 2-3 CC Mode Main Interface
4. Set CC mode current range (5 A or 30 A) and voltage mode (36 Vor 150 V)
Note: The lower ranges provide better resolution and accuracy at
low current settings.
5. Set the current input value. This is the amount of current that theload will attempt to draw when the output is enabled.
6. Set the rising slew rate and the falling slew rate in CC mode. The
default unit for the slew rate is A/us.
7. Press On/Off to turn on the channel input. At this time, the actual
input voltage, current, resistance and power will be displayed on
the main interface.
Note: The load will begin to sink current only if the input voltage isgreater than the conduction voltage of the system (default
value is 0 V).

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Chapter 2 Function and Features

Warning

To avoid electric shock, ensure that the DUT is connected to the
input terminals of the load properly before you turn on the channel
input.

8. Press the Display key to enter the waveform display interface, as
shown in Figure 2-4. By default, the current waveform is displayed.
When the input voltage changes, the load will sink a constantcurrent.
Press the Display key again to exit the waveform display interface
and return to the main interface of CC mode.

Figure 2-4 Waveform display interface of CC Mode

Constant Voltage (CV) Mode
In CV mode, the electronic load will sink enough current to maintain the input
voltage at the setpoint, as shown in Figure 2-5.

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SIGLENT

Constant voltage mode
Figure 2-5 Voltage-Current Relationship Schema under CV Mode
Operating Steps
1. Turn off the instrument, as shown in Figure 2-2, connect the DUT
and the channel input terminals on the front panel of the load.

CAUTION

While making a connection, the positive polarity of the load should
be connected to the (+) terminal of the channel output, and thenegative polarity of the load to the (-) terminal of the channel
output. Incorrect polarity may cause damage to the instrument or
the DUT.
2. Press CV to enter the main interface of CV mode, as shown in
Figure 2-6.

Figure 2-6 CV Mode Main Interface
3. Set CV mode current range (5 A or 30 A) and voltage range (36 V
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Chapter 2 Function and Featuresor 150 V)
Note: The low range provides better resolution and accuracy at
low voltage settings.

4. Set voltage
5. Press On/Off to turn on the channel input. At this time, the actual
input voltage, current, resistance and power will be displayed on
the main interface.
Note: The load will sink current only if the input voltage is larger thanthe conduction voltage of the system (default value is 0 V).

Warning

To avoid electric shock, ensure that the DUT is connected to the
input terminals of the load properly before you turn on the channel
input.

6. Press the Display key to enter the waveform display interface, as
shown in Figure 2-7. By default, the voltage waveform isdisplayed. When the input current changes, the load will apply aconstant voltage. Press the Display key again to exit the waveform
display interface and return to the main interface of CV mode.

Figure 2-7 Waveform display interface of CV Mode

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Chapter 2 Function and Features

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Constant Resistance (CR) Mode
In CR mode, the electronic load is regard as a constant resistance and will
give linear change of current with respect to input voltage changes, as shownin Figure 2-8.

Constant resistance mode
Figure 2-8 Voltage-Current Relationship Schema under CR Mode
Operating Steps
1. Turn off the instrument, as shown in Figure 2-2, connect the DUT
and the channel input terminals on the front panel of the load.

CAUTION

While making a connection, the positive polarity of the load should
be connected to the (+) terminal of the channel output, and thenegative polarity of the load to the (-) terminal of the channel
output. Incorrect polarity may cause damage to the instrument or
the DUT.
2. Press CR to enter the main interface of CR mode, as shown in
Figure 2-9.

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Chapter 2 Function and Features

Figure 2-9 Main Interface of CR Mode
3. Set CR mode current range (5 A or 30 A), voltage range (36 V or
150 V) and resistance range (Low/Middle/High/Upper).
Note: The low range provides better resolution and accuracy at
low resistance settings.
4. Set the target resistance value
5. Press On/Off to turn on the channel input. At this time, the actual
input voltage, current, resistance and power will be displayed on
the main interface.
Note: The load will begin to sink current only if the input voltage isgreater than the conduction voltage of the system (default value
is 0 V)

Warning

To avoid electrical shock, ensure that the DUT is connected to the
input terminals of the load properly before you turn on the channel
input.
6. Press the Display key to enter the waveform display interface, as
shown in Figure 2-10. By default, the resistance waveform isdisplayed. When the input voltage changes, the load current will
linearly change. Press the Display key again to exit the waveform
display interface and return to the main interface of CR mode.

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Chapter 2 Function and Features

SIGLENT

Figure 2-10 Waveform display interface of CR Mode

Constant Power (CP) Mode
In CP mode, the electronic load will sink a constant power. If the input
voltage rises, the input current draw will be decreased to maintain a constant
power sink following the equation (P= V*I), as shown in Figure 2-11.

Constant power mode
Figure 2-11 Voltage-Current Relationship Schema under CP Mode
Operating Steps
1. Turn off the instrument, as shown in Figure 2-2, connect the DUT
and the channel input terminals on the front panel of the load.

CAUTION

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Chapter 2 Function and Features
While making a connection, the positive polarity of the load should
be connected to the (+) terminal of the channel output, and thenegative polarity of the load to the (-) terminal of the channel
output. Incorrect polarity may cause damage to the instrument or
the DUT.

2. Press CP to enter the main interface of CP mode, as shown in
Figure 2-12.

Figure 2-12 CP Mode Main Interface
3. Set CP mode current range (5 A or 30 A) and voltage range (36 Vor 150 V).
4. Set power value.
5. Press On/Off to turn on the channel input. At this time, the actual
input voltage, current, resistance and power will be displayed on
the main interface.
Note: The load begin to sink power only if the input voltage is greaterthan the conduction voltage of the system (default value is 0 V)

Warning

To avoid electric shock, ensure that the DUT is connected to the
input terminals of the load properly before you turn on the channel
input.
6. Press the Display key to enter the waveform display interface, as
shown in Figure 2-13. By default, the power waveform isdisplayed. When the input voltage changes, the load will sink a
constant power. Press the Display key again to exit the waveform
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Chapter 2 Function and Features

SIGLENT

display interface and return to the main interface of CP mode.

Figure 2-13 Waveform display interface of CP Mode

Dynamic test function
In dynamic test operation, the electronic load can be switched between two
parameters based on the set values. This can be useful when testing the
dynamic performance of a power supply or source. Press Shift + CC key on thefront panel to enter the dynamic test interface.
Before testing, it is important to configure the load set points: A value, B
value, pulse width time, frequency, duty ratio,etc. The rise and fall slew rates
are also important settings for dynamic testing.
Dynamic test supports three modes:
 Continuous Pulse Toggle

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Chapter 2 Function and Features

Continuous mode
In continuous operation, when you enable the dynamic test operation, theload will continuously switch between Level A and Level B, as shown in Figure
2-14.

Figure 2-14 Transient CC Continuous Mode (Cont)
Take CC mode as example (other modes function in a similar fashion)
Operating Steps
1. Connect device
Power on instruments Connect the DUT and the channel input
terminals of the electronic load, as shown in Figure 2-2.
2. Set running parameters
Press the Shift + CC key on the front panel to enter transient test
operation. Continuous mode (CC) requires setting the proper slew
rates for all Level steps, as shown in 2-15, 2-16, 2-17.

Figure 2-15 CC Cont mode page 1

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Figure 2-16 CC Cont mode page 2

Figure 2-17 CC Cont mode page 3
The parameters for the continuous operation mode include Function,
Mode, range, A _Level, B_Level, rising slew rate, falling slew rate,
A_width, B_width and trigger selection. The interface menu can bedivided into three pages.
Set range
Current range: 5 A or 30 A
Voltage range: 36 V or 150 V
Set A_level
The sink current toggles between a high value and a low value incontinuous mode. The A_Level indicates a low value. The default unit
for A_Level is Ampere (A).
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Chapter 2 Function and Features

Set B_level
The sink current toggles between a high value and a low value incontinuous mode. The B_Level indicates a high value. The default unit
for B_Level is Ampere (A).
Set width
A_width/B_width: The time during which the sink current stays at Level
A. Default units are s or ms and the setting range is 0.020 ms ~ 999 s.
Slew_RIS and Slew_FAL
Slew_RIS and Slew_FAL: The set rate of change to a new level fromthe current value. Its unit is A/us and setting range is 0.001 ~ 2.5 A/us.
3. Enable trigger
Press Shift + CP key to enter the Utility interface. After pressing the“Config” key, the trigger source can be set in page 2 of the selection
menu which includes Manual/Ext/Bus.Manual displays a trigger softkey
on page 3 of the Dynamic test. Pressing this key will trigger the step.
Ext sets the trigger type to external, which looks for a valid trigger on
the rear panel Ext Trig input. Bus is a trigger sent over the remotecontrol bus. See “Set trigger” in Section 3 for more details. Press On/Off
to turn on the channel input. At this time, the actual input voltage,current, resistance and power will be displayed on the main interface.
The sink current will toggle continuously between the set A level and B
levels.
Tip:
The sink current may maintain a constant value in the main interface
when the width is set to a very small value because the load is switching
too quickly between A_level and B_level set points.
Use thewaveform display function to see the waveform more clearly.
4. View waveform display
Press Display to enter waveform display interface, shown in figure 218. The waveform will display the current curve when ”I” is selected in
CC Cont mode. Press Display again to exit the waveform display
interface and return to the main interface of CC Cont mode.

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Figure 2-18 Waveform display interface of Cont mode

Pulse mode
Dynamic test operations using pulse mode configures the load to source
the low value (Level A) until a valid trigger is received. At this time, the load
settings will change to the B values. The settings will switch back to the A
values after maintaining B for the set pulse width time, as shown in Figure 219.

Figure 2-19 Transient CC Pulse Mode(Cont)
Take CC mode as example (other modes are similar)
Operating Steps
1. Connect device
Power on instruments Connect the DUT and the channel input
terminals of the electronic load, as shown in Figure 2-2.
2. Set running parameters
Press the Shift + CC key on the front panel to enter transient test
operation. CC continuous mode is not only the default mode but also
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Chapter 2 Function and Features

the only one mode that requires a set slew rate. Switch to pulse modeby pressing the “Mode” key, as shown in 2-20, 2-21, 2-22.

Figure 2-20 CC pulse mode page 1

Figure 2-21 CC pulse mode page 2

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Figure 2-22 CC pulse mode page 3
The parameters for the pulse operation mode include Function, Mode,
range, A_ Level, B_ Level, rising slew rate, falling slew rate, width andtrigger selection. The interface menu can be divided into three pages.
Set range
Current range:5 A or 30 A
Voltage range: 36 V or 150 V
Set A_level
The sink current toggles between a high value and a low value inPulse mode. The A_Level is designated as the low value. The default
unit for A_Level is Ampere (A).
Set B_level
The sink current toggles between a high value and a low value inPulse mode. The B_Level is designated as the high value. The
default unit for B_Level is Ampere (A).
Set width
Width: The time duration for the step to sink current Level B... Its unit
is s or ms and setting range is 0.020 ms ~ 999 s.
Slew_RIS and Slew_FAIL
Slew_RIS and Slew_FAIL: The rate of change to a new level from thecurrent sink value of the load. Slew units are A/us and setting range is
0.001 ~ 2.5 A/us.
3. Enable trigger
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Press Shift + CP key to enter the Utility interface. After pressing the“Config” key, the trigger source can be set on page 2 of the menu. There
are three trigger options available: Manual/Ext/Bus . Manual displaysa trigger softkey on page 3 of the Dynamic test. Pressing this key will
trigger the step. Ext sets the trigger type to external, which looks for avalid trigger on the rear panel Ext Trig input. Bus is a trigger sent over
the remote control bus. See “Set trigger” in Section 3 for more details.
Press On/Off to turn on the channel input. At this time, the actual input
voltage, current, resistance and power will be displayed on the maininterface. The sink current will continuously toggle between the A level
and the B level.
Tip: The sink current may maintain a constant value in the maininterface when the width is set to a very small value because theload is switching quickly between A_level and B_level. Users canuse the waveform display function to see the waveform more clearly.

Toggle mode
Under Toggle mode (Tog), when you enable the dynamic test operation, theload will switch from the A value to the B value after receipt of a trigger signal.
It will switch from B to A upon receipt of the next trigger signal, as shown in
Figure 2-23.

Figure 2-23 Transient CC Toggle Mode(Tog)
Take CC mode as example (other modes are similar)
Operating Steps
1. Connect device
Power on instruments Connect the DUT and the channel input
terminals of the electronic load, as shown in Figure 2-2.
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2. Set running parameters
Press the Shift + CC key on the front panel to enter tansient test
operation. CC continuous mode is not only the default mode but also
the only one mode that requires setting the slew rate. Switch to Tog
mode by press the “Mode” key, as shown in 2-24, 2-25, 2-26.

Figure 2-24 CC Tog mode page 1

Figure 2-25 CC Tog mode page 2

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Figure 2-26 CC Tog mode page 3
The parameters for the pulse operation mode include Function, Mode,
range, A_ Level, B_ Level, rising slew rate, falling slew rate and trigger
selection. The interface menu can be divided into three pages.
Set range
Current range: 5 A or 30 A
Voltage range: 36 V or 150 V
Set A_level
The sink current toggles between a high value and a low value in Pul
mode. A_Level indicates the low value. The default unit for A_Level isAmpere (A).
Set B_level
The sink current toggles between a high value and a low value in Pul
mode. B_Level indicates the high value. The default unit for B_Level isAmpere (A).

Slew_RIS and Slew_FAIL
Slew_RIS and Slew_FAIL: The rate of change to a new level from thecurrent sink value of the load. Its unit is A/us and the setting range is
0.001 ~ 2.5 A/us.
3. Enable trigger
Press Shift + CP key to enter Utility interface .After pressing “Config”
key the trigger source can be set in page 2 of the menu. There are threetrigger types:Manual/Ext/Bus. Manual displays a trigger softkey on
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page 3 of the Dynamic test. Pressing this key will trigger the step. Ext
sets the trigger type to external, which looks for a valid trigger on therear panel Ext Trig input. Bus is a trigger sent over the remote control
bus. See “Set trigger” in Section 3 for more details. Press On/Off to turnon the channel input. At this time, the actual input voltage, current,
resistance and power will be displayed on the main interface.

OCPT Test Function
Overcurrent Protection Testing (OCPT) uses preset limits on current to halta test. At the beginning of a test, the load measures the input voltage. If thisvalue meets or exceeds the Von setpoint (OCP_V), the load starts to sink thecurrent after a period of delay time. The load then increments the sink current
value using the user-defined step size (I_Step) and time interval (Delay). At
each step, , the load measures the input voltage and compares it to theprotection voltage value (OCP_V). If the measured value is higher, it indicatesthat OCPT does not occur. If the load has not reached the maximum current set
poiunt (I_MAX), the sink current will increment again. The load proceeds to run
and increases with regular steps until it reaches the set protection voltage value(OCP_V) or the end current (I_End). If the sink current of the load reaches thestop value at any time during the test, the load will halt the test automatically.
The OCPT test fails, and the test ends. If lower, it indicates that OCPT does
occur. Judge whether the current under test is within the set current range(I_MIN to I_MAX). If yes, the load passes the test. If no, the load fails the test.

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Figure 2-27 OCPT Test Function
Operating Steps
1. Connect device
Power on instruments and connect the DUT and the channel input
terminals of the electronic load, as shown in Figure 2-2.
2. Set running parameters
Press the Shift + CV key on the front panel , select “OCPT” then enter
OCPT test operation, as shown in 2-28, 2-29, 2-30.

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Figure 2-28 OCPT Test Function Page 1

Figure 2-29 OCPT Test Function Page 2

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Figure 2-30 OCPT Test Function Page 3

The parameters for the OCPT test mode include range, OCP_V,
I_Step, I_Start, I_End, I_MIN, I_MAX, Delay. The interface menu canbe divided into three pages.
Set range
Current range: 5 A or 30 A
Voltage range: 36 V or 150 V
Set OCP_V
The protection voltage of the OCPT test function. The default unit for
the value is V.
Set I_Step
The step current in OCPT test function. The default unit for I_Step isAmpere (A).
Set I_Start
The sink current when the load starts the OCPT test sequence. The
default unit for I_Start is Ampere (A).
Set I_EndThe sink current when the load stops the OCPT test sequence. The
default unit for I_End is Ampere (A).
Set I_MIN
The minimum value of the protection current in OCPT test function.
The default unit for I_End is Ampere (A).
Set I_MAX
The maximum value of the protection current in OCPT test sequence.
The default unit for I_End is Ampere (A).
Set Delay
The time interval during which the current moves from step-to-step in
the OCPT test sequence. The default unit for Delay is s.
3. Turn on the input channel
Press On/Off to turn on the channel input. At this time, the actual input
voltage, current, resistance and power will be displayed on the maininterface. If OCPT test pass, the interface of the load will pop-up amessagebox with the words “Test complete”. Then load will disable its
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output. If an OCPT test fails, the interface of the load will pop-up amessagebox such as “Below limit ,test fail”, “Over limit , Test fail”, etc.
Then the input channel of the load will be closed automatically.
4. View waveform
Press Display key to enter the waveform display interface, as shown infigure 2-31. The sink current should have a stepped increase in the
waveform when viewing current (I) data. . Press the Display key again
to exit the waveform display interface and return to the main interfaceof OCPT test mode.

Figure 2-31 Waveform display interface of OCPT

OPPT Test Function
When the Over Power Protection Test (OPPT) test starts, if the input voltage
is less than the Von value, the load starts to work after a period of delay time
according to the delay setting. The power increases with incrementing steps set
by P_Step. At each step, the load input voltage is compared to the overpowerprotection voltage (OPP_V). If higher, it indicates that OPPT does not occur.
The load proceeds to run and increases the sink power with regular steps until
it reaches the protection voltage setting (OPP_V) or the last power setting(P_End). If the sink power of the load has reached the stop value (P_End) ,the load output will be closed automatically, the OPPT test fails, and the test
ends. If lower, it indicates that OPPT does occur. If the measured power under
test is within the set maximum (P_MAX) and minimum power range (P_MIN),
the load passes the test. If not, the load fails the test.

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Figure 2-32 OPPT Test Function
Operating Steps
1. Connect device
Power on instruments and connect the DUT and the channel input
terminals of the electronic load, as shown in Figure 2-2.
2. Set running parameters
Press the Shift + CV key on the front panel , select “OPPT” then enter
OPPT test operation, as shown in 2-33, 2-34, 2-35.

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Figure 2-33 OPPT Test Function Page 1

Figure 2-34 OPPT Test Function Page 2

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Figure 2-35 OPPT Test Function Page 3

The parameters for the OPPT test mode include range,
OPP_V,P_Step, P_Start, P_End, P_MIN, P_MAX, Delay.
The interface menu can be divided into three pages.
Set range
Current range: 5 A or 30 A
Voltage range: 36 V or 150 V
Set OPP_V
The protection voltage of the OPPT test function. The default unit for
the value is Volts (V).
Set P_Step
The step power for the OPPT test function. The default unit for I_Step
is Watts (W).
Set P_Start
The sink power when the load starts the OPPT test sequence. The
default unit for P_Start is Watts (W).
Set P_EndThe sink power when the load stops the OPPT test sequence. The
default unit for P_End is Watts (W).
Set P_MIN
The minimum value of the protection power in the OPPT test function.
The default unit for P_End is Watts (W).
Set P_MAX
The maximum value of the protection power in the OPPT test function.
The default unit for I_End is Watts (W).
Set Delay
The time interval during which the power moves from step-to-step in
OPPT test function. The default unit for Delay is seconds (s).
3. Turn on the input channel
Press On/Off to turn on the channel input. At this time, the actual input
voltage, current, resistance and power will be displayed on the maininterface. If the OPPT test results are a pass, the interface of the load
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will pop-up a messagebox that states “Test complete”. Then the load
will disable the output. If the OPPT test fails, the interface of the load
will pop-up a messagebox such as “Below limit ,test fail”, “Over limit ,Test fail”, etc.Then the input channel of the load will closed
automatically.
4. View waveform
Press Display key to enter waveform display interface, as shown infigure 2-36. The sink power will have a stepped increase in the
waveform after setting the Data selection to be power (“P”). Press the
Display key again to exit the waveform display interface and return tothe main interface of OPPT test mode.

Figure 2-36 Waveform display interface of OPPT

Battery Test Function
The Battery test function can be used in CC,CP, or CR mode. The primarytermination conditions for the Battery test function includes: cut-off voltage, cutoff capacity, and/or discharge time. When any one of the three conditions is met,
the load immediately stops discharging. When only one or two condition(s)is/are selected as the termination condition(s) for the battery test, please set
the unused termination conditions to the "OFF" state. The C-Add function canrecord accumulated capacity if you like.

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Figure 2-37 OPPT Test Function
The Battery test function reflects the reliability of the battery and theremaining battery life.
Take CC mode as example (other modes are similar)
Operating Steps
1. Connect device
Power on the instrument and connect the DUT and the channel input
terminals of the electronic load, as shown in Figure 2-2.
2. Set running parameters
Press the Shift + CV key on the front panel , select “Battery” thenenter the Battery test operation mode, as shown in 2-38, 2-39.

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Figure 2-38 Battery Test Function Page 1

Figure 2-39 Battery Test Function Page 2

The parameters for the Battery test mode include Function, Range,
Current, V_Stop, C_Stop, T_Stop . The interface menu can be divided
into two pages.
Set Function
Choose CC, CR, or CP mode
Set range
Current range: 5 A or 30 A
Voltage range: 36 V or 150 V
Set current
The discharge current of the Battery test function. The default unit for
the value is Ampere (A).
Set V_Stop
The cut-off voltage in the Battery test function . When the battery
voltage reaches the cut-off voltage, the load stops discharging
automatically. The default unit for V_Stop is Volts (V).
Set C_Stop
The cut-off discharge capacity in the Battery test function . When theaccumulated capacity is greater than the cut-off capacity, the load
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stops discharging automatically. The default unit for C_Stop is
milliamp-hour (mAh).
Set T_Stop
The discharge time in the Battery test function. When the accumulated
time is greater than the cut-off time, the load stops discharging
automatically. The default unit for T_Stop is seconds (s).

3. Turn on the input channel
Press On/Off to turn on the channel input. At this time, the actual
discharge voltage, current, time and capacity will be displayed on themain interface. If any of the termination conditions are met, the load will
pop-up a messagebox stating “Battery test compelete”,which will
disappear by pressing any key.
Note: Once the channel input is turned on, the load will not start to sinkcurrent until the input voltage is greater than the break-over voltage.
4. View waveform
Press the Display key to enter the waveform display interface, as shownin figure 2-40. By observing the CC waveform with the Data parameter
set to current (I), you can see the load discharge with a constantcurrent. Press the Display key again to exit the waveform display
interface and return to the main interface of OPPT test mode.

Figure 2-40 Waveform display interface of BAT

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DCR Mode
DCR function, which can test the internal resistance of the battery.
Operating StepsIn the "Battery" testing interface, press the mode function key to select"DCR" and enter the DCR testing interface.
Set the time_ 1 and Time_ 2. Current_ 1 and Current_ 2. After set "ON", thetest can be conducted. After two periods of operation, it will automatically stop
and a prompt will pop up on the test completion screen.
The graph shown on the screen allows users to clearly understand therelationship between Time_1 and Time_2 and Current_1 and Current_2. The
waveform in the graph does not change with the test result. The test result is
updated in the 'DCR' item on the screen, and when the next test is performed,
the last test result is updated to keep the 'LAST' value.

List Test Function
List test mode enables you to automatically test devices by creating andexecuting a sequence of test steps using a single function. For example, you
could create a list test that contains 10 difference steps using the CC function,
or a two step list using CV. You define each step limit, measurement ranges,
dwell time, slew rate and trigger mode then save this specific sequence as alist. The external trigger mode can be used to sequence the test with otheroperations and instrumentation. All listed data is stored in non-volatile memory
with “.list” as the file extension. This secures the data and makes it easy to store
and edit directly from the SDL front panel.
As shown in Figure 2-41, the load simulates the complex sequences of
input changes based on the list parameters that you create. The list function
supports CC, CV, CR, and CP modes.

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Figure 2-41 List Test Function
Users can edit list files through the front panel or use a previously
created list.
Here, we will use the CC mode as an example (other modes are similar)
Operating steps
1. Connect device
Power on the instrument and connect the DUT and the channel input
terminals of the electronic load, as shown in Figure 2-2.
2. Set running parameters
Press the Shift + CV key on the front panel , select “List” then enter
List test mode, as shown in 2-42, 2-43.

Figure 2-42 List Test Function Page 1

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Figure 2-43 List Test Function Page 2
The parameters for the List test mode include Function, Range, Step,
Count, Storage, and Trig . The interface menu can be divided into two
pages.
To edit the values of the list, use the front panel arrows and keypad tonavigate the list step table and adjust each step value:

Set Function
Choose CC,, CV, CR, or CP mode
Set range
Current range: 5 A or 30 A
Voltage range: 36 V or 150 V

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Set Step
Here, you set the number of steps that are required for the list.
Set Count
The Count is the number of times the list will be executed before theend of the test. The Count has a range from 0~255. When Count is0, the SDL will display “infinite” and will run each step in the list until it
is disabled or stopped manually.
Set parameter of list
The parameter list of List mode includes step, sink value of each step,running time of each step, slew rate, readback current, readback
voltage, readback resistor, readback power. The arrow in the right ofparameter list indicates that the current interface can not display
parameters of all steps. At this time, the user can edit all parameters ofeach step by using the direction keys/arrows to move the focus todifferent areas of the list.
3. Turn on the input channel
Press On/Off to turn on the channel input. At this time, the actual
discharge voltage, current, time and capacity will be displayed on themain interface. The parameter status can be displayed in real time inparameter preview area.

Warning

To avoid electric shock, ensure that the DUT is connected to the
input terminals of the load properly before you turn on the channel
input.
4. View waveform
Press Display key to enter the waveform display interface, as shown infigure 2-44. Here, you can observe the measured performance of the
input signal. Change the Data label (I, V, P, or R) to view a different
parameter. Press the Display key again to exit the waveform display
interface and return to the main interface of List test mode.

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Figure 2-44 Waveform display interface of List mode
5. Storage
In the List function interface, you can press “Save” to save theparameters for List mode to the internal or external memory, and you
can read and recall it if necessary by pressing “Recall”. Up to eight List
files can be stored internally.

Auto Test Function
The auto test function in the SDL1000X electronic load is very powerful. It
allows for multiple steps, similar to List mode. The biggest difference is that it
can also change the test function type (CC, CV, CP, CR, LED, etc..) at every
step. Up-to ten test files can be saved with each test file having a maximum offifty steps each. The file extension defined for an Autotest file is “.prog”.
Operating Steps
1. Connect device
Power on the instrument and connect the DUT and the channel input
terminals of the electronic load, as shown in Figure 2-2.
2. Set running parameters
Press the Shift + CV key on the front panel , select “Program” thenenter Program test mode, as shown in 2-45.

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Figure 2-45 Program Test Function
The parameters for the program test mode include Step, Storage, Trig,
Result.
Set Step
Set the number of steps you wish to run in this specific program.
Set parameter of list
The parameter list of Program mode includes mode, current range(Irange), voltage range (Vrange), pause (paus), Short, time on (Ton),time off (Toff), delay (Tdly), min, max, Set, resistance range (Rrange),
Vo, Io, Rco. The arrow in the right of parameter list indicates that thecurrent interface can not display parameters of all steps. At this time,user can edit all parameters of each steps by using direction key after
move the focus to the list.
(1) Set operating mode
There are five modes that can be selected: CC, CV, CP, CR, or LED.
(2) Set the current and voltage ranges:
Current range: 5 A or 30 A
Voltage range: 36 V or 150 V(3) Set pause Status
User can pause auto test if need. Simply highlight/select the celllabeled paus using the keypad arrows on the front panel androtate the SDL control knob to enable change the entry value. Thenthe load will pause at this step when running this auto test step.Autotest can recover after receiving the next trigger.

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SIGLENT(4) Set short Status
User can enter a short circuit step if needed. Similar to pause,
use the keypad arrows to select the Short cell and rotate the knob
to enable it. Then the load will short the circuit at this step whenrunning an auto test.
(5) Set Loading Time(Ton)This is the time duration of each step and its range is 0.01~100
seconds (s).
(6) Set unLoading Time(Toff)
The time interval in adjacent step and its setting range is
0.01~100S(7) Set Delay Time(Tdly)
The time is between begin test to sample the current or voltage
value of the load. Its setting range is 0.01~Ton s.
(8) Set minimum
The minimum sink value. Units depend on the current mode in use.
 In CC mode, its default unit is V
 In CV mode, its default unit is A
 In CP mode, its default unit is W
 In CR mode, its default unit is Ω(9) Set maximum
The maximum sink value Units depend on the current mode in use.
 In CC mode, its default unit is V
 In CV mode, its default unit is A
 In CP mode, its default unit is W
 In CR mode, its default unit is Ω(10) Set input value Set running current value in CC mode. The default unit is A
 Set running voltage value in CV mode. The default unit is V
 Set running power value in CP mode. The default unit is W
 Set running resistance value in CR mode. The default unit is Ω(11) Set Rrange
Resistance range includes Low, Middle, High and Upper.
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Set the operating voltage value in LED mode. The default unit is V(13) Set LED operating current (Io)
Set the operating current value in LED mode. The default unit is A(14) Set LED Coeff (Rco)Users can change the operating voltage and resistance bychanging “Rco” which has a set range from 0~1.
3. Turn on the input channel
Press On/Off to turn on the channel input. At this time, the actual
discharge voltage, current, time and capacity will be displayed on themain interface. The parameter status can be displayed in real time inparameter preview area.
NOTE: The test operation depends on the trigger setting. If you haveselected manual trigger, you can press Trigger to being the
programmed test at this time.
Warning

To avoid electric shock, ensure that the DUT is connected to the
input terminals of the load properly before you turn on the channel
input.
4. View waveform
Press Display key to enter the waveform display interface, as shown infigure 2-44. Here, you can observe the change of thecurrent/voltage/resistance/power over time. Press the Display key again
to exit the waveform display interface and return to the main interface of
the Program test mode.

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Figure 2-44 Waveform display interface of Program mode
5. Result
The auto test complete interface, as shown in Figure 2-45.
 Result list: Steps, Results and Remarks.
 Readback parameters: Including readback current, etc.
 Running step: Indicates the number of running steps.
 Clear: Remove all data in result list.
6. Storage
In the Program function interface, you can press “Save” to save theparameters for Program mode to the internal or external memory, andyou can read and recall it if necessary by pressing “Recall”. The SDL
can save ten Program files.

LED Test Function
This function adds a break-over voltage setting to the conventional CR
mode. In short, the load acts like a diode. When the input voltage of the load isgreater than the diode break-over voltage, the load can simulate the working
principle of a diode and measures the drive current as in a real LED test.
Calculation method of Vd and Rd value: Vo: Working voltage of the load of an LED constant current source.
 Io: Working current of an LED constant source.
 Vd: Break-over voltage of the diode Rd: Resistance of operating point
A typical V - I characteristic curve of LED lights, as shown in Figure 2-45:

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Figure 2-45 V - I characteristic curve of LEDs
According to the V-I curve, we can get Rd and Vd:
𝑉2 − 𝑉1Rd =𝐼2 − 𝐼1
𝑉𝑑 = 𝑉𝑜 − (𝐼𝑜 ∗ 𝑅𝑑)
Choose V2, I2, V1, and I1 near the static working point (as shown in the
red circle of the curve). Users also can calculate the value of Vd and Rd
according to methods below:
Vd = V * 0.8 Rd= 0.2 V/I
Operating Steps
1. Connect device
Power on instruments and connect the DUT and the channel input
terminals of the electronic load, as shown in Figure 2-2.
2. Set running parameters
Press the Shift + CR key on the front panel to enter LED test mode, as
shown in 2-46.

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Figure 2-46 LED Test Function
The parameters for the LED test mode include Range, Io, Vo, Rco.
Set Range
Current range: 5 A or 30 A
Voltage range: 36 V or 150 V
Set VoThe working voltage at the operating point.
Set IoThe working current at the operating point.
Set RcoSet Rd by the following formula:
𝑅𝑑=(𝑉𝑜/𝐼𝑜)∗(1−𝑅𝑐𝑜)
3. Turn on the input channel
Press On/Off to turn on the channel input. At this time, the actual sinkvoltage, current, power, resistance will be displayed on the maininterface. The sink current will be increasing with increase input voltageof the load.
Note:
Once the channel input is turned on, the load will not start to sink thecurrent until the input voltage is greater than the break-over voltage.

Warning

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To avoid electric shock, ensure that the DUT is connected to the
input terminals of the load properly before you turn on the channel
input.
4. View waveform
Press Display key to enter waveform display interface, as shown infigure 2-47. Here, you can view data with respect to time. Select a data
type to choose the graphed values. Press the Display key again to exit
the waveform display interface and return to the main interface of LED
test mode.

Figure 2-47 Waveform display interface of LED test mode

Waveform Display Function
The electronic load provides the waveform display function and supports
the following operations: pausing, recording, , and capturing the waveform.
Therefore, you can dynamically observe the trend of the input. The waveform
display function is applicable to CC/CV/
CR/CP/LED/Con/Pul/Tog/OCPT/OPPT/List/
Battery/Program/ExtI/ExtV modes.
For example , in CC mode press Display key to enter waveform display
interface, as shown in figure 2-48.

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Figure 2-48 The waveform display in CC mode

Operating Steps
1. Set TimeThe time set range is 4 s ~ 80 h in all modes.
Tip
When the time that you set is greater than 120 s, it will be
automatically displayed in minutes. When greater than 120 min, it will
be automatically displayed in hours.
2. Set Datamenu items under "Data" include I, U, R, and P.
3. Pause and Start
When the “Pause” key is pressed, the load will suspend the datacollection and graphing of the waveform. When the “Start” key ispressed, the load will continue to graph waveform. These operations
govern graphing only. The active state of the load is still being
governed independently by the current settings, list, or program
running.
4. Print
After you insert the USB storage device, press “Print” to capture thescreen or images and save them in ".BMP" format to the USB storage
device.
5. Record
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save the data file in ".CSV" format to the USB storage device.
This will prompt you to name the file. The load will begin to graph thedata as well as write it to the USB memory stick. When you arerecording data, the corresponding flag will display in the top of theinterface :The flag will disappear after pressing the “Record” key again.
6. Playback
Press “PlayBack” to play back the recorded data files.
(1) After stopping a recording, press”Playback” to enter the playback
interface.
(2) Press the File softkey to open the file dialog window.
(3) Use the keypad arrows to navigate and select the data file in“.CSV” format that you wish to replay.
(4) Press the “Read” key , the instrument will read the selected data
file and display in the waveform display interface.
Tip
The recording function and palyback function can not be enabled at
the same time.

RestoreThe load can save various types of files to internal or external memories.
You can recall and read them when necessary. The load supports aninternal non-volatile memory (Local(C:) and an external memory(USB(D:). Disk D is only available when a USB storage device is
detected over the USB HOST interface on the front panel.
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The load only supports FAT32 USB flash drives.
1. Local (C:)
User can save the currently set state files to the local storage area
and recall them when necessary. Eight list files and ten program files
can be saved to the local drive.
2. USB(D)
Disk D is only available when a USB storage device is detected over
the USB HOST interface on the front panel. You can save thecurrently set state files and data files of various function modes tothe USB storage device and you can also copy the files from Disk C
to Disk D. The number of files that can be saved is determined by
the storage space of the disk.
Press Restore key on the front panel of the load to enter the storage andrecall interface, as shown in Figure 2-49.

Figure 2-49 Storage and Recall Interface under CC mode
Save
Operating Steps
1. Press Restore to enter storage interface, then enter the filecatalogue list in List/Program.
2. User can select an arbitrary file in the files catalogue in
List/Program, then click “Save” to enter file name edit interface
which is default display “Default”, as shown in figure 2-50.

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Figure 2-50 filename edit interface
3. The filename edit box can be input uppercase and lowercase
English letters、0~9 natural numbers and special characters “-” or“_” or ”.”, etc.
Input character:
The character can only be edit in the place where the cursor is
located in the filename edit box. Press Enter or “Next Char” key toedit the next character.
Character selection area:
The white color area is the character selection area in the interface.
Press up and down key to select character in vertical direction andpress left and right key to select character in the horizontal direction.
Then press Enter key or rotary knob to confirm.
4. Selection function of the interface:
1. Delete Char: Delete the character where the cursor is and thelength of filename will reduce one character length. If thecharacter is the final one, it will display “A” after deleted.
2. Previous Char: Cursor moves left
3. Next Char: Cursor moves right
4. OK
5. Cancel
Press “OK” key after input the filename in the filename edit interface.

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Read
Operating Steps
1. Press Restore to enter the storage interface, then enter the files
catalogue list in List/Program.
2. You can select an arbitrary file in the files catalogue in
List/Program, then click “Read” to enter List/Program mode.
Copy and Paste
This function only operates in copying files from the internal storage (Cto an external USB memory device (D:)
Operating steps
1. Press Restore to enter the storage interface, then enter the files
catalogue list in List/Program.
2. Users can select an arbitrary file in the files catalogue in
List/Program, then click “Copy” to copy the current file that isselected.
3. Switch to the Disk D file catalogue and press “Paste” in the target
path to paste the file to Disk D. Only one file can be copied andpasted at one time.
DeleteUsers can delete files in Disk C and Disk D.
Operating steps
1. Press Restore to enter the storage interface, then enter the files
catalogue list in Disk C and Disk D.
2. User can select an arbitrary file in the files catalogue in
List/Program or Disk C and Disk D, then click “Delete” to delete thecurrent file that be selected. Only one file can be deleted at one
time.

RenameUsers can rename filename of the files in Disk C and Disk D.
Operating steps
1. Press Restore to enter storage interface, then enter the files
catalogue list in Disk C and Disk D.
2. Users can select an arbitrary file in the files catalogue in
List/Program or Disk C and Disk D, then click “Rename” to rename
the current file that be selected. Press “OK” after finished editing.

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Function of Terminals on the Rear Panel
Sense mode
When the DUT outputs large currents, the voltage drop due to the leadand contact resistance of the load leads cannot be ignored. To ensure an
accurate measurement for the output voltage of the DUT, the load provides
Sense (remote sense) working mode. In this mode, the Sense terminals (asshown in figure 2-51) are directly connected to the output terminals of the
DUT. Remote sensing compensates for the voltage drop caused by the load
leads, ensuring that the output voltage of the DUT is consistent with the input
voltage of the load.

Figure 2-51 Sense terminal on the real panel
Figure 2-52 shows the Sense connections on the front panel.

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Figure 2-52 Sense connection
Operating steps
1. As shown in the above figure, connect the load to the DUT. Ensurethat the polarity of the connections is correct.
2. Press Shift and CP key to enter the system utility function
interface. Press “Config” and “Sense” to enable (disable) the
Sense function.
Note: The Sense terminals must be connected to the output
terminals of the DUT. If not, then the load cannot accurately
measure the voltage of the terminals in any function.
Tip: In case where the DUT outputs large currents, the load leads
should be as short as possible. Twisting the sense leads can also
assist in minimizing measurement noise.

External Trigger Function
The SDL features an external trigger which allows sequencing and control
to be performed using another instrument or trigger source. To start, set
the trigger source to “External” by pressing Shift > Utiity > Config > Page
2/2 and set Trig to Ext. The trigger signal input and ground connection are
shown on the rear panel. The trigger input signal should be 0~5V TTL level
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Operating Steps
1. Press Shift and CP key to enter the system utility function menu. Select“Config” and set trigger mode of the trigger source be “Ext”, then press
Enter to confirm.
2. When using the external trigger mode, the falling edge of the trigger
signal output from the negative and positive trigger terminal can enable
trigger function. The trigger can be used in List, Program, and dynamic
test mode.

CAUTION

Please do not connect the negative pole of the load and the negative poleof external trigger termination , the fifth termination of rear panel which isgrounded.

Voltage fault Indicating Function
When the load is in overvoltage protection or reverse connection protection,
the VF terminal which indicates a voltage fault will output a high level.

Current and Voltage monitor
The output terminal of current and voltage monitor sources a 0~10 V
analog signal that represents the input from zero to full range. Users can use

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SIGLENTan external voltmeter or oscilloscope to observe the trend of the input current
or voltage.
Operating StepsTo set up VMON
Press Shift utility, press config. go to page 2, press EXTC, press
V_M_OFF and again to change to on state, SDL comes back “Pleaseconfirm that the BNC is connected” – move blue highlight over to OK with
universal dial, press universal dial to select, V_M_ON goes on. SDL isready to send output to VMON.
To set up IMON
Press Shift utility, press config. go to page 2, press EXTC, press I_M_OFF
and again to change to on state, SDL comes back “Please confirm that the
BNC is connected” – move blue highlight over to OK with universal dial,press universal dial to select, I_M_ON goes on. SDL is ready to send
output to IMON.

CAUTION

Please do not connect the negative pole of the load and the negative pole ofmonitor termination.

Short-circuit monitor
The load can deliver a short circuit at the input terminals. The protection
functions are still active even when using the short circuit function. Press Shiftand Short key to switch the short circuit status. The short circuit status does
not influence existing setting values. When exiting short-circuit mode, the load
will return back to the original setting status.
Note: The short circuit function needs to turn on the enable switch in thesetting, and the short key pressed on the front panel will take effect.
Operation method: Press Shift utility, press config. go to page 3, press
Short_EN and again to change to on state.

Protection Functions
Overvoltage protection (OVP)The load will be immediately disable the input, the buzzer will sound, andSDL1000X User Manual 67

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the LCD screen will pop-up an overvoltage message if overvoltage protection
is triggered. The VF pin on the rear board will output a TTL high level signal if
overvoltage occurs. This signal can be used to monitor the output status of the
DUT. Press Shift and Display key to clear overvoltage protection status.

Overcurrent protection (OCP)
The load supports two kinds of overcurrent protections: Hardware
overcurrent protection and software overcurrent protection.
Hardware overcurrent protection: The maximum load current of theelectronic load is limited to the max current of the existing current range
by hardware. When the hardware triggers overcurrent protection, theload will automatically disable the input and the LCD screen will pop-up
an overcurrent message. The prompt box of overcurrent protection will
disappear if the input drops below the set current range (I_Range).
Software overcurrent protection: For a more precise protection limit,
you can set the load software overcurrent protection value using thefollowing steps:
Press Shift and CP key to enter system utility interface. Then press“Limit” and “I_Protect” to set relevant parameters, such as current value
and delay time. If the load sink current is greater than the protection
current value, the load input will automatically be disabled and an
overcurrent message will pop-up.

To exit OCP protection, press any key on the front panel of the load. .

Overpower protection (OPP)
The load supports two kinds of overpower protections: Hardware
overpower protection and software overpower protection.
Hardware overpower protection: The maximum load power of theelectronic load is limited within about two hundred watt. When the
hardware triggers overpower protection, the load input will be disabled
automatically and the LCD screen will pop-up an overpower message.
The prompt box of overpower protection will disappear if the hardware
overpower protection situation is relieved.
Software overpower protection: The user can set load software
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enter system utility interface. Then press “Limit” and “I_Protect” to set
relevant parameters, such as power value and delay time. If the sinkpower of the load is greater than the protection power value, the theload input will be disabled and a pop-up overpower message willappear..
To exit OPP protection, press any key on the front panel of the load.

Over-temperature Protection (OTP)
The load will enter OTP if the temperature of internal power devices
exceeds 85℃. If an OTP fault occurs, the load input will be disabled and an
OTP warning message will pop-up. When the temperature of the loaddecreases and is below the protection point, press any key on the front panelof the load to clear the error and exit OTP status.

Input Reverse Polarity Protection (RPP)
When the load makes a reverse connection with the DUT, the load input will
be automatically disabled immediately. At this time, the buzzer sound and the
LCD screen will pop-up an RPP message.
Tip If the reverse current is greater than the rated maximum current, theload may be destroyed.

Warning

To avoid to damage the load, when the load RRP occurs, the user shouldclose the load and reconnect the positive and negative poles.

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Chapter 3 System Utility Function
SystemPress Shift and the CP key to enter the system utility function interface.
Then press ”system” to enter the system info interface, as shown in figure 3-1
and 3-2.

Figure 3-1 System info page 1

Figure 3-2 System info page 2
Table 3-1 Tab Descriptions
No.

Name

Description

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1

System info

2

Interface

3

Sound

4

Language

5

Factory6

Upgrade7

BoardTest

SIGLENT

System info tab.
View startup times,software version,hardware
version,serial number, and product ID.
Communication interface setting tab.
Configures parameters for remote communicationinterfaces (USB/RS232/GPIB/LAN).
Sound tab.
Enabled/disable sounds.
Language tab.
Chinese/English
Factory tab.
Reset the system to the default settings.
Upgrade tab.
Select software version and upgrade the load.
BoardTest
Includes LCD test,LED test,LCD test,, Keyboard
test, Buzzer function test, and Chip test.

1. System info
Press Shift and CP key to enter system utility function interface. Thenpress the “System” key to enter system info interface, as shown in figure 33.

Figure 3-3 System info interface
In “System info” interface, user can View startup times、software version、
hardware version、serial number and product ID about the load.
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2. Interface
Press Shift and the CP key to enter the system utility function interface.
Then press the “Interface” key to enter the interface tab of the load which
default selection tab is USB, as shown in figure 3-4.

Figure 3-4 USB interface
The instrument supports USB/RS232/GPIB/LAN communicationinterfaces. Users can use this remote interface to control the instrument
using a computer. Please set the relevant parameters when selecting thecommunication interface.
Note: The USB and LAN interface of the load are “hot swappable” and can beconnected and disconnected while the instrument is powered on.
USB/RS-232/GPIB/LAN cannot be used at the same time. Only one
interface can be used for remote control.
View USB ID
Use a USB cable to connect the load to a computer via the USB DEVICE
interface. Then, the load can be controlled remotely.
Press Interface to enter the communication interface tab, and then press
the USB key to select the "USB" tab, as shown in Figure 3-4.
Set the parameters of the RS232 interface

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SIGLENTUse the 9-pin RS232 cable (female-to-female, cross-over) to connect the
RS232 interface to the PC, and set the interface parameters (such as baudrate, parity, etc.) that match the PC. Then, user can remotely control the
instrument. The RS232 interface is shown in the following figure. For thedescriptions of the pins, refer to Table 2-2.

Figure 3-5 RS232 Interface
Table 3-2
Pin
1
2
3
4
5
6
7
8
9

Pin description of RS232.
Name
NC
TXD（Transmit Data）
RXD (Receive Data)
NC
SGND
NC
CTS (Clear To Send)
RTS (Request To Send)
NC

Description
No Conjunction
Data transmission
Data receiving
No Conjunction
Signal grounding
No Conjunction
Clear to send
Request to send
No Conjunction

Press Interface key to enter “Interface” tab and press “RS232” to enter the
RS232 interface, as shown in figure 3-6.

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Figue 3-6 RS232 Interface
In “RS232” interface, user can set and view relevant interface parameters
about RS232.
1. Baud Rate
The available baud rates include 4800 9600, 19200, 38400 , 57600 , and115200 bps.
2. Parity
The available parity modes include None, Even, and Odd.
3. Stop Bits
The available stop bits include 1 or 2.
4. Data Bits
The default data bits is 8.
5. Flow
The default flow is None.
Set GPIB Adress
Before using the GPIB interface, use the USB-GPIB interface converter toextend the GPIB interface, and then use the GPIB cable to connect the load to
the PC. Figure 3-7 show the GPIB interface.

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Figure 3-7 GPIB Interface
The GPIB Load address range is from 0~30. The default address of GPIB
is 1 which is stored in the non-volatile memory and is not influenced byrestoration of factory settings.
Set the parameters of the LAN interface
Before using the LAN interface, connect the load to a computer or the
local area network (LAN) where the computer is vissble and ensure sufficientconnectivity.
Press Interface to enter the communication interface tab, and then press
the “LAN” key to select the "LAN" tab to enter the network parameter settinginterface, as shown in Figure 3-8.

Figure 3-8 LAN Interface

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In this interface, you can view the network connection status and configure
the network parameters such as IP address, subnet mask, default gateway and
DHCP status. The setting is store in the non-volatile memory and do not
influenced by restore factory setting.
Connection Status
IP configuration include two modes:
 DHCP(Dynamic host configuration protocol)
 Manual IP(Manual configuration)
In different IP configuration modes, the configurations for IP address and othernetwork parameters are different.
1) DHCP
Under DHCP mode, the DHCP server on the current network assigns
network parameters (such as the IP address) to the instrument. When
DHCP is ON, relevant parameters can not be edited; When DHCP is OFF,IP parameter must be set manually.
2) Manual IP
In this mode, user need to set sufficient IP net parameters.
1. Mac address
Physical address is also called media access control address (MAC
address). It is also called hardware address, which can be used to define
the location of the network device. The physical address for one device isunique and is not allowed to be modified. It can be used to identify the
instrument when you assign the IP address to the instrument. A physicaladdress is a 48-bit (6-byte) addressing scheme, usually represented in Hex.
For example, 00-80-e1-00-00-00.

2. SoundPress Shift and CP key to enter system utility function interface. Thenpress ”Sound” to enter the Sound menu, as shown in figure 3-9.

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Figure 3-9 Sound tab
In the “Sound” menu, you can enable or disable the key sound and tips
sound. The load buzzer will sound when you press the key on the front panel
or rotate the knob after the key sound is enabled. It will not sound if the key
sound is disabled. If the Tips sound is set to ON, the load buzzer will soundwhen pop-up tips or warning messages. Turn off the Tips sound, and the load
buzzer will not sound except during any load protection tips.

3. Language
The load supports Chinese and English language man-machine interaction
and tips.

4. Factory Setting
Press Shift and the CP key to enter the system utility function interface.
Switch to page 2 then press ”Factory” to restore factory settings, as shownin figure 3-10.

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Figure 3-10 Restore factory setting interface
When user selects OK, the parameters in every function will restore todefaults.

5. Upgrade
The SDL1 can be upgraded with new firmware using an external FAT32
formatted USB memory device.
To update the firmware, press Shift and CP key to enter system utility
function interface. Then switch to page 2 and press the “Upgrade” key on
the front panel. Finally, select the proper firmware upgrade version in theinterface of the USB file catalogue.
NOTE: Firmware updates can be found on the product page located on thewebsite (www.siglent.com, www.siglentamerica.com, www.siglenteu.com)

6. BoardTest
Users can check the current status of the load by using the BoardTest
function. This feature tests the keypad LEDs, LCD,, Keyboard, Buzzer
and Chip test function.
 LED Test: Test whether the LED lights responsible for keypadbacklighting are operational
 LCD Test: Test whether the LED screen display is operational Keyboard
Test: Test whether the function of all keys except the power switch on
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the front panel is normal or not.
 Buzzer: Test whether the buzzer can sound or not.
 Chip Test: Including the self-test result of the load, EEPROM and ADC.

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ConfigTurn ON/OFF the Sense Function
When the DUT outputs large currents, the Sense terminal can be used toaccurately test the voltage across the output terminals to compensate for thevoltage drop on the load. Set Vrmt to ON to enable the remote sense test
function.

Turn ON/OFF SOF Function
SOF stands for Stop On Fail. When enabled, the auto test function will stoprunning immediately when any step fails during an auto test. If SOF isdisabled, the auto test will continue to run continue until the test is completed,even if a failure is detected.

Break-Over Voltage
When testing power products with slow voltage rise rates, if the electronicload input is opened before power, the power may latch protection. In this way,
the user may set VON value. The electronic load only latches when the power
voltage is higher than this value.

Turn ON/OFF Von-Latch Function
on the Von Latch function locks the input voltage to the Von-Latch value if
the Von-Latch value is measured. The load will start testing when the the power
output voltage rises and is higher than the break-over voltage.. When the power
voltage drops and is lower than the break-over voltage, the load will contine tolatch at the Von-Latch value , as shown in figure 3-11.

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Figure 3-11 V - I characteristic curve of Von Latch

Set Trigger
Trigger operation is mainly applied to the Dynamic, List and Program
test functions. The load supports three modes: Manual, Ext and Bus.
 Manual
When the trigger source is set to Manual mode, press the trig tab
in dynamic, , List, or Program mode will generate a trigger signal.
 Bus
When the trigger source is set to Bus mode, the load will execute a
trigger operation when it receives the remote command (such as*TRG) from USB, LAN, RS232 and GPIB interface.
 Manual
The Ext monitor terminals on the rear panel of the load can receive
external trigger signals. When the trigger source is set to be Ext mode and apulse(0~5V TTL) which have falling edge plus to the terminal, the load will
trigger signal.

Set AverIn “Config” tab, when user select “Aver” can set the average point numberof the read-back current and voltage in the load. The range is 6~14. The greater
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Chapter 3 System Utility Functionof the average point number, the slower of the read-back current and voltage inthe load.

Set EXTC (External Interface)
The “EXTC” tab includes: (Int, ExtI, ExtV), ExtSwitch, I_M_ON, V_M_ON
four tabs. It mainly supply the way user control the external terminals on therear panel, current and voltage monitor, external control ON/OFF.

Int
The load will return the mode before enter “EXTC” tab after select the “Int”
tab.

ExtI
After selecting “ExtI” tab, the load will display the ExtI interface. It includes:
Type, RangeI, RangeV options. The sink current of the load can becontrolled by the “EXT” terminals on the rear panel of the load. The input
voltage is not suggested to greater than 10V , otherwise it may destroy theload. Users can simulate input current of the load which range is from zero
to full current range.
Operating Steps
1. Connect device
Power on instruments and connect the DUT and the channel input
terminals of the electronic load, as shown in Figure 2-2.

Warning

The input voltage range of the “EXT” terminals is 0~10 V. To avoid
damage to the instrument, please pay attention to the polarity of thedevice terminals .

2. Set running parameters
Press the Shift + CP key on the front panel to enter system utility
function interface. Select “Config” option and Switch to page 2, thenchoose “EXTC”. User can enter ExtI interface after press “INT” andchoose “ExtI” tab, as shown in 3-12.

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Figure 3-12 The main interface of the ExtI mode
The parameters for the ExtI mode include RangI and RangV.
Set Range
Current range: 5 A or 3 0A
Voltage range: 36 V or 150 V
Set External Input Voltage
The sink current in ExtI mode can be controled by the external input
voltage which range is 0~10 V. The default unit of current is A

3. Turn on the input channel
Press On/Off to turn on the channel input. At this time, the actual sinkvoltage, current, power, resistance will be displayed on the maininterface.
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Note: Once the channel input is turned on, the load will not start to sinkthe current until the input voltage is greater than the break-overvoltage.
4. View waveform
Press Display key to enter waveform display interface, as shown infigure 3-13. By means of observe waveform of ExtI mode after set theData selection be “I”, user can see the trend of the sink current. Press
the Display key again to exit the waveform display interface and returnto the main interface of ExtI mode.

Figure 3-13 Waveform display interface of ExtI mode

ExtV
After selecting “ExtV” tab, the load will enter ExtV interface. It includes Type,
RangeI, RangeV three options. The sink voltage of the load can becontrolled by the “EXT” terminals on in the rear panel of the load. User cansimulate input voltage of the load which range is from zero to full range.
Operating Steps
1. Connect device
Power on instruments and connect the DUT and the channel input
terminals of the electronic load, as shown in Figure 2-2.

Warning

The input voltage range of the “EXT” terminals is 0~10 V. To avoid
damage to the instrument , please pay attention to the polarity of the
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device terminals .

2. Set running parameters
Press the Shift + CP key on the front panel to enter the system utility
function interface. Select “Config” option and Switch to page 2, thenchoose “EXTC”. User can enter ExtI interface after press “INT” andchoose “ExtV” tab, as shown in 3-14.

Figure 3-14 The main interface of the ExtV mode
The parameters for the ExtV mode include RangI and RangV.
Set Range
Current range: 5 A or 30 A
Voltage range: 36 V or 150 V
Set External Input Voltage
The sink voltage in ExtV mode can be controled by the external input
voltage which range is 0~10 V. The default unit of voltage is V

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3. Turn on the input channel
Press On/Off to turn on the channel input. At this time, the actual sinkvoltage, current, power, resistance will be displayed on the maininterface.
Note: Once the channel input is turned on, the load will not start to sinkthe current until the input voltage is greater than the break-overvoltage.
4. View waveform
Press Display key to enter waveform display interface, as shown infigure 3-15. By means of observe waveform of ExtV mode after set theData selection be “V”, user can see the trend of the sink voltage. Press
the Display key again to exit the waveform display interface and returnto the main interface of ExtV mode.

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Figure 3-15 Waveform display interface of ExtV mode

ExtSwitch
The load input switches can be controlled by the external TTL electricallevel. During external input control, the [On/Off] key will become invalid andthe load input switches can only be controlled by the external TTL electricallevel. The load input will be switched on in case of low level external input
and meet a falling edge; and the load input will be switched off in case ofhigh level external input.

IMON
The 0-10 V analog quantity output signal of current monitoring output
terminal represents input current to which the terminal belongs from 0 to fullrange. The input current is proportional to the voltage on the terminal. An
external voltmeter or oscilloscope can be connected to display input current
change.

VMON
The 0-10 V analog quantity output signal of voltage monitoring output
terminal represents input voltage to which the terminal belongs from 0 to
full range. The sink voltage is proportional to the voltage on the terminal.
An external voltmeter or oscilloscope can be connected to display input
current change.

SLMT
SDL1000X electronic load can measure the rise and fall time of the voltage
in CC, CV, CR and CP mode. This function can simply simulate the rise andfall rate of the power voltage.
Operating Steps
1. Press Shift and CP key to enter system utility function interface. Thenenter “Config” tab and select “SLMT” tab to enter SLMT function.
2. Turn on the “TMon” tab, The voltage rise time “T_Rise” and falling time
“T_Fall” will be displayed on LCD screen, as shown in figure 3-16.

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Figure 3-16 SLTM tab
3. Input the low voltage and high voltage, then turn on the TMon
4. Connect the load to the DC power under test. Set the power output higher
than the V_High. At this time, the power is OFF.
5. Set a sink current of the load in CC mode, then turn on the load input.
6. Turn on the power under test, The T_Rise is displayed quickly on the LCD
screen which is the voltage rise time.
7. Turn off the power under test, The T_Fail on the LCD screen is the fallingtime.
8. Close all instruments and finish the test.

Limit
I_Protect
SDL1000X electronic load can overcurrent protection by the software of theload. Turn on the load input, if the sink current of the load is higher than theprotection current, the load will turn off input automatically and pop-up an
overcurrent protection message after a delay period.
Operating Steps
1. Press Shift and CP key to enter system utility function interface. Thenenter “Config” tab and select “I_Protect” tab to enter I_Protect function.
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2. Turn on the “TMon” tab to enable the I_Protect. Then set the protection
current and delay time, as shown in Figure 3-17.

Figure 3-17 I_Protect tab
3. Connect the load to the DC power under test when the power is OFF.
4. Set a sink current in CC mode of the load.
5. Turn on the power output and the load input. Delay a period of time, theovercurrent protection of the load will occur.
6. Close all instruments and finish the test.

P_Protect
SDL1000X electronic load can simulate overpower protection by thesoftware of the load. Turn on the load input, if the sink power of the load ishigher than the protection power, the load will turn off input automatically andpop-up over power protection message after a delay period.
Operating Steps
1. Press Shift and CP key to enter system utility function interface. Thenenter “Config” tab and select “P_Protect” tab to enter P_Protect function.
2. Turn on the “TMon” tab to enable the P_Protect. Then set the protection
power value and delay time, as shown in Figure 3-17.

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Chapter 3 System Utility Function

Figure 3-17 P_Protect tab
3. Connect the load to the DC power under test when the power is OFF.
4. Set a sink current in CC mode of the load.
5. Turn on the power output and the load input. Delay a period of time, theoverpower protection of the load will occur.
6. Close all instruments and finish the test.

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Chapter 4 Troubleshooting

SIGLENT

Troubleshooting
Here are some common failures and their solutions. If the problem persists
after following the listed steps, please contact SIGLENT.
1. The instrument cannot start up.
(1) Check whether the power is correctly connected.
(2) Check whether the power switch at the front panel is reallyon.
(3) Remove the power cord and check whether the voltage selector is at
the proper scale, whether the specification of the fuse is correct andwhether the fuse is intact. If the fuse needs to be changed, refer to “To
Replace the Fuse”.
(4) If the problem remains, please contact SIGLENT.
2. The USB device cannot be identified.
(1) Check whether the USB device is correctly working(2) Check whether the USB Host interface of the oscilloscope is correctly
working(3) Make sure to use Flash U-disk. This oscilloscope cannot support hard
drive disk devices(4) Make sure to use FAT32 system format(5) Restart the oscilloscope then insert the USB device(6) If the problem remains, please contact SIGLENT.

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SIGLENT

Contact SIGLENT
America
SIGLENT Technologies America, Inc
6557 Cochran Rd Solon, Ohio 44139
Tel: 440-398-5800
Toll Free:877-515-5551
Fax: 440-399-1211
info@siglent.com
www.siglentamerica.com

Headquarters
SIGLENT TECHNOLOGIES CO., LTD.
Blog No.4 & No.5, Antongda Industrial Zone, 3rd Liuxian Road, Bao’an
District, Shenzhen, 518101, China.
Tel:+ 86 755 3661 5186
Fax:+ 86 755 3359 1582
sales@siglent.com
www.siglent.com/ens

EuropeSIGLENT TECHNOLOGIES EUROPE GmbH
Liebigstrasse 2-20, Gebaeude 14, 22113 Hamburg Germany
Tel: +49(0)40-819-95946
Fax: +49(0)40-819-95947
info-eu@siglent.com
www.siglenteu.com

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