RIGOL DL3000 Series Programmable DC Electronic Load Instruction Manual

DL3000 Series Programmable DC Electronic Load

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Specifications

• Product Name: DL3000 Series Programmable DC Electronic
  Load

• Manufacturer: RIGOL TECHNOLOGIES CO.,LTD.

• Publication Number: PVJ01103-1110

• Standards: Conforms to national and industrial standards in
  China, ISO9001:2015, and ISO14001:2015

Product Usage Instructions

General Safety Instructions

Please review the following safety precautions carefully before
operating the instrument:

• Use Proper Power Cord: Only use the exclusive power cord
  designed for the instrument.

• Ground the Instrument: Connect the earth terminal of the power
  cord to the Protective Earth terminal before connecting any
  terminals.

• Connect the Probe Correctly: Ensure probe ground lead is
  connected to earth ground.

• Observe Terminal Ratings: Check all ratings and markers on the
  instrument before connecting.

• Overvoltage Protection: Ensure no overvoltage can reach the
  product.

• Avoid Circuit Exposure: Do not touch exposed components when
  powered on.

Product Certification

The product conforms to national and industrial standards in
China, ISO9001:2015, and ISO14001:2015. Contact RIGOL for any
issues.

Frequently Asked Questions (FAQ)

Q: Can I use a different power cord with the instrument?

A: No, only use the exclusive power cord designed for the
instrument to ensure safe operation.

Q: What should I do if I encounter overvoltage?

A: Ensure that no overvoltage can reach the product to avoid any
danger of electric shock. Contact RIGOL for assistance if
needed.

Q: How do I ground the instrument correctly?

A: Connect the earth terminal of the power cord to the
Protective Earth terminal before connecting any input or output
terminals to prevent electric shock.

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RIGOL
Performance Verification Manual
DL3000 Series Programmable DC Electronic Load
May. 2024 RIGOL TECHNOLOGIES CO.,LTD.

RIGOL
Guaranty and Declaration
Copyright
© 2024 RIGOL TECHNOLOGIES CO., LTD. All Rights Reserved.
Trademark Information
RIGOL® is the trademark of RIGOL TECHNOLOGIES CO.,LTD.
Publication Number
PVJ01103-1110
Notices
RIGOL products are covered by P.R.C. and foreign patents, issued and pending. RIGOL reserves the right to modify or change parts of or all the specifications
and pricing policies at the company’s sole decision. Information in this publication replaces all previously released materials. Information in this publication is subject to change without notice. RIGOL shall not be liable for either incidental or consequential losses in
connection with the furnishing, use, or performance of this manual, as well as any information contained. Any part of this document is forbidden to be copied, photocopied, or rearranged without prior written approval of RIGOL.
Product Certification
RIGOL guarantees that this product conforms to the national and industrial standards in China as well as the ISO9001:2015 standard and the ISO14001:2015 standard. Other international standard conformance certifications are in progress.
Contact Us
If you have any problem or requirement when using our products or this manual, please contact RIGOL. E-mail: service@rigol.com Website: www.rigol.com

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General Safety Summary
Please review the following safety precautions carefully before putting the instrument into operation so as to avoid any personal injury or damage to the instrument and any product connected to it. To prevent potential hazards, please follow the instructions specified in this manual to use the instrument properly.
Use Proper Power Cord. Only the exclusive power cord designed for the instrument and authorized for use within the local country could be used.
Ground the Instrument. The instrument is grounded through the Protective Earth lead of the power cord. To avoid electric shock, connect the earth terminal of the power cord to the Protective Earth terminal before connecting any input or output terminals.
Connect the Probe Correctly. If a probe is used, the probe ground lead must be connected to earth ground. Do not connect the ground lead to high voltage. Improper way of connection could result in dangerous voltages being present on the connectors, controls or other surfaces of the oscilloscope and probes, which will cause potential hazards for operators.
Observe All Terminal Ratings. To avoid fire or shock hazard, observe all ratings and markers on the instrument and check your manual for more information about ratings before connecting the instrument.
Use Proper Overvoltage Protection. Ensure that no overvoltage (such as that caused by a bolt of lightning) can reach the product. Otherwise, the operator might be exposed to the danger of an electric shock.
Do Not Operate Without Covers. Do not operate the instrument with covers or panels removed.
Do Not Insert Objects Into the Air Outlet. Do not insert objects into the air outlet, as doing so may cause damage to the instrument.
Use Proper Fuse. Please use the specified fuses.
Avoid Circuit or Wire Exposure. Do not touch exposed junctions and components when the unit is powered on.

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Do Not Operate With Suspected Failures. If you suspect that any damage may occur to the instrument, have it inspected by RIGOL authorized personnel before further operations. Any maintenance, adjustment or replacement especially to circuits or accessories must be performed by RIGOL authorized personnel.
Provide Adequate Ventilation. Inadequate ventilation may cause an increase of temperature in the instrument, which would cause damage to the instrument. So please keep the instrument well ventilated and inspect the air outlet and the fan regularly.
Do Not Operate in Wet Conditions. To avoid short circuit inside the instrument or electric shock, never operate the instrument in a humid environment.
Do Not Operate in an Explosive Atmosphere. To avoid personal injuries or damage to the instrument, never operate the instrument in an explosive atmosphere.
Keep Product Surfaces Clean and Dry. To avoid dust or moisture from affecting the performance of the instrument, keep the surfaces of the instrument clean and dry.
Prevent Electrostatic Impact. Operate the instrument in an electrostatic discharge protective environment to avoid damage induced by static discharges. Always ground both the internal and external conductors of cables to release static before making connections.
Use the Battery Properly. Do not expose the battery (if available) to high temperature or fire. Keep it out of the reach of children. Improper change of a battery (lithium battery) may cause an explosion. Use the RIGOL specified battery only.
Handle with Caution. Please handle with care during transportation to avoid damage to keys, knobs, interfaces, and other parts on the panels.

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Document Overview

DL3000 series programmable DC electronic load (hereinafter referred to as the DL3000 series) is a cost-effective electronic load with high performance. This manual gives a detailed description of the test method of performance verification for the DL3000 series. The test is designed to verify whether DL3000 series can work normally and whether it can meet with the given specifications.
Main Topics of this Manual:
Chapter 1 Test Overview This chapter introduces test preparations, recommended test devices, test precautions, and test result records.
Chapter 2 Specifications Test This chapter introduces the test method for the specifications of the DL3000 series.
Appendix The appendix provides the test record forms for all the models of the DL3000 series and its performance verification.
Content Conventions in this Manual:
The number of channels and the rated values of input parameters for the DL3000 series are listed in the following table. Unless otherwise specified, this manual takes DL3031A as an example to illustrate the test methods for the performance verification of the DL3000 series.

Model

No. of Channels

DL3021/DL3021A 1

DL3031/DL3031A 1

Voltage Current DC 150 V 40 A DC 150 V 60 A

Power 200 W 350 W

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Contents
Contents

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Guaranty and Declaration ……………………………………………………………… I
General Safety Summary …………………………………………………………….. II
Document Overview …………………………………………………………………… IV
Chapter 1 Test Overview …………………………………………………………. 1-1 Test Preparations ………………………………………………………………………… 1-2 Recommended Test Devices ………………………………………………………….. 1-3 Test Precautions …………………………………………………………………………. 1-4 Test Result Records……………………………………………………………………… 1-4
Chapter 2 Specifications Test …………………………………………………… 2-1 CC Programming Accuracy and Readback Accuracy……………………………… 2-2 Preparations ………………………………………………………………………… 2-2 Test Procedures ……………………………………………………………………. 2-3 CV Programming Accuracy and Readback Accuracy……………………………. 2-11 Preparations ………………………………………………………………………. 2-11 Test Procedures ………………………………………………………………….. 2-12 CR Programming Accuracy…………………………………………………………… 2-20 Preparations ………………………………………………………………………. 2-20 Test Procedures ………………………………………………………………….. 2-21
Appendix …………………………………………………………………………………… 1 Appendix A: Test Record Forms…………………………………………………………. 1 DL3021 Performance Verification Test Record Form………………………….. 1 DL3021A Performance Verification Test Record Form………………………… 4 DL3031 Performance Verification Test Record Form………………………….. 7 DL3031A Performance Verification Test Record Form………………………. 10 Appendix B: Specifications……………………………………………………………… 13

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Chapter 1 Test Overview
Chapter 1 Test Overview
Contents in this chapter: Test Preparations Recommended Test Devices Test Precautions Test Result Records

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Chapter 1 Test Overview

Test Preparations

Before performing the performance verification test, make the following preparations.

1. Perform the self-inspection to make sure that the instrument can work normally.

Plug the specified power cord available in the accessories into the AC power supply connector of the instrument, and then connect the instrument to the properly grounded AC power. Press the Power key , and then the instrument is launched and begins to perform the self-inspection. If the instrument passes the self-inspection, the instrument starts normally with a splashing screen. If the self-inspection fails, please turn off the instrument and then turn it on again to execute the self-inspection. If the problem still persists, contact RIGOL. Ensure that you locate the problem for self-inspection failure and resolve the problem properly. You are not allowed to perform the performance verification test until the instrument passes the self-inspection test.
Note: 1) Before connecting to power, make sure that the setting of the voltage
selector on the rear panel of DL3000 series matches the AC power supply to be connected. Ensure that the fuse currently installed matches the input voltage. The specifications for AC input voltages and their matched fuses supported by the DL3000 series are as shown in Table 1-1.

Table 1-1 AC Input Voltage and Fuse Rating

AC Selector

AC Input Voltage

115 Vac

±(10% of AC input + 115 Vac), 50 Hz to 60 Hz

230 Vac

±(10% of AC input + 230 Vac) (max: 250 Vac), 50 Hz to 60 Hz

Fuse Rating T0.315 A/250 V T0.20 A/250 V

Note: The upper limit of the AC input voltage supported by the DL3000 series is 250 Vac.

2. Before performing the self-inspection, make sure that no load is connected to the terminals on the front and rear panels of the instrument.
   2. Make sure that the instrument is used within its calibration period (1 year). If calibration is required, please contact RIGOL.

3. Warm up the instrument for at least 30 minutes.

4. Make sure that the ambient temperature is between 18 and 28, and the relative humidity is less than 80%.

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5. Keep the cables of the test probe as short as possible.
CAUTION The tests described in this manual are required to be carried out by the professionals. During the test, dangerous voltages might be present on the output terminals of the power supply and some test devices.

Recommended Test Devices

You are recommended to use the devices listed in Table 1-2 or other devices whose performance specifications meet the “Performance Requirement” listed in Table 1-2.

Table 1-2 Recommended Test Devices

Device

Performance Requirement

Digital Multimeter

Readout Resolution: 6½

DC Power Supply

DC 150 V/1 A DC 8 V/90 A

Current Sampling Resistor RM

0.01 (temperature drift: 1 ppm)

USB Cable

—

Recommended Model
RIGOL DM3068 DSP-150-005HD DSP-008-090HD
RUG-Z-R010-01-TK1
—

Usage
Measures DC voltage Provides voltage and current Measures programming accuracy and readback accuracy Realizes remote control, measures programming accuracy and readback accuracy

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Chapter 1 Test Overview

Test Precautions

Connection methods for the input terminals (see Figure 1-1):

Shield

Outer Nut A

Figure 1-1 Connect Input Terminals
(1) Rotate the outer nut of the input terminal counterclockwise to remove it;
(2) Connect the test lead to Position A of the input terminal.
(3) Fasten the outer nut of the input terminal clockwise.
(4) Secure the shield to the terminal and then tighten the screw.
WARNING To avoid electric shock, ensure that you have installed the shield when the DC voltage output from the DUT is equal to or greater than 70 V.
During the test, please shield the space radiation noise in the test environment to avoid its impact on the test.
Test Result Records
Please record and save the test results for each test item. The “Appendix A: Test Record Forms” in this manual provides the test record forms for all the models of the DL3000 series. The form lists the test item and its corresponding performance specification limits. You can record the test results in the form.
Tip RIGOL recommends that you should copy a few pieces of the desired test record forms before each test. During the test, you can record the test results in the copied form to ensure that the form can be repeatedly used.

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Chapter 2 Specifications Test
Contents in this chapter: CC Programming Accuracy and Readback Accuracy CV Programming Accuracy and Readback Accuracy CR Programming Accuracy

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Chapter 2 Specifications Test

CC Programming Accuracy and Readback Accuracy
Preparations
Before performing the test, select the appropriate AC voltage via the “AC Selector” on the rear panel of the electronic load according to the AC voltage standard of your country (230 Vac is taken as an example in all the tests in this manual). At room temperature (25), connect the recommended devices specified in “Recommended Test Devices” according to the connection method in Figure 2-1. During the test process, please set the AC voltage according to the selected voltage in “AC Selector” on the rear panel of the electronic load.
In the CC tests, a current sampling resistor (required to be calibrated) should be serially connected between the DC power supply and the electronic load. It is used to convert the current signal under test to the voltage signal for the measurement of related parameters.

DL3000
+ –
+-

AC Power Supply

+ Digital Multimeter/

RM

– Digital Oscilloscope/

RMS Voltmeter

+-
DC Power Supply

Figure 2-1 CC Test Connection

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Test Procedures

CC programming accuracy refers to the error between the current setting of the channel and the actual input current value when the electronic load is in CC mode. CC readback accuracy refers to the error between the readback current value and the actual input current value when the electronic load is in CC mode.

The following section takes DL3031A as an example to test the CC programming accuracy and readback accuracy of the DL3000 series.

Note: During the test, please select the corresponding test record form according to the model of the DL3000 series under test to set the corresponding parameters, record and calculate the corresponding specifications.

Specification:

Annual Accuracy[1] (25 ± 5), ±(% of Output + Offset)

Programming

±(0.05%+0.05%FS[1])

Readback Value ±(0.05%+0.05%FS[1])

Note[1]: The accuracy specifications are acquired through calibration at 25 after 1-hour warm-up. Note[2]: FS indicates the full scale.

Procedures: 1. Power off DL3031A. Connect DL3031A, AC power supply, DC power supply, a
current sampling resistor (with a resistance RM 0.01 ), and a digital multimeter according to Figure 2-1 (Pay attention to the connection method for the current sampling resistor, the channel input terminals of DL3031A, and the digital multimeter). Connect the USB DEVICE interface on the rear panel of the electronic load to the PC via the USB cable.

2. Turn on the AC power supply, and then set its voltage to 230 V, the frequency to 50 Hz. Then, turn on the output.

Note: The voltage setting of the AC power supply should be matched with the AC voltage selector on the rear panel of DL3031A.

3. Power on DL3031A, and restores all the settings of the electronic load to its factory default settings.

4. Turn on the DC power supply, and set its output voltage to 8 V and output current to 62 A.

5. Measure the CC programming accuracy and readback accuracy when the current range is 60 A.

(1) Measure the CC programming accuracy and readback accuracy when the

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Chapter 2 Specifications Test

current setting value is a low value.

a) Power on DL3031A. Send the following commands via the remote interface to set the current of the input channel, and then enable the channel input.

:SOUR:CURR:RANG 60 :SOUR:CURR:LEV:IMM 8 :SOUR:INP:STAT 1

/Sets the current range of the electronic load to 60 A./ /Sets the input current of the electronic load to 8 A./ /Enables the channel input./

b) Turn on the digital multimeter. Select the DC voltage (DCV) measurement function and set the range to “Auto”. Make sure that the electronic load works in CC mode. Read the digital multimeter and record the reading (U1) of the digital multimeter. Calculate the current value (I1 = U1/RM).

c) Send the :MEAS:CURR? command via the remote interface, read and record the returned current value (I2) of the query command.

d) Calculate the CC programming accuracy (|I1 – IL|) and the CC readback accuracy (|I2 – I1|). Compare them with the specified specifications in Table 2-4. Wherein, IL is the low current value of the input channel.

(2) Measure the CC programming accuracy and readback accuracy when the current setting value is a rated value.

a) Power on DL3031A. Send the following commands via the remote interface to set the current of the input channel, and then enable the channel input.

:SOUR:CURR:RANG 60 :SOUR:CURR:LEV:IMM 60 :SOUR:INP:STAT 1

/Sets the current range of the electronic load to 60 A./ /Sets the input current of the electronic load to 60 A./ /Enables the channel input./

b) Turn on the digital multimeter. Select the DC voltage (DCV) measurement function and set the range to “Auto”. Make sure that the electronic load works in CC mode. Read the digital multimeter and record the reading (U2) of the digital multimeter. Calculate the current value (I3 = U2/RM).
c) Send the :MEAS:CURR? command via the remote interface, read and record the returned current value (I4) of the query command.

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d) Calculate the CC programming accuracy (|I3 – I0|) and the CC readback accuracy (|I4 – I3|). Compare them with the specified specifications in Table 2-4. Wherein, I0 is the rated current value of the input channel.

6. Measure the CC programming accuracy and readback accuracy when the current range is 6 A.

(1) Measure the CC programming accuracy and readback accuracy when the current setting value is a low value.

a) Power on DL3031A. Send the following commands via the remote interface to set the current of the input channel, and then enable the channel input.

:SOUR:CURR:RANG 6 :SOUR:CURR:LEV:IMM 1 :SOUR:INP:STAT 1

/Sets the current range of the electronic load to 6 A./ /Sets the input current of the electronic load to 1 A./ /Enables the channel input./

b) Turn on the digital multimeter. Select the DC voltage (DCV) measurement function and set the range to “Auto”. Make sure that the electronic load works in CC mode. Read the digital multimeter and record the reading (U1) of the digital multimeter. Calculate the current value (I1 = U1/RM).

c) Send the :MEAS:CURR? command via the remote interface, read and record the returned current value (I2) of the query command.

d) Calculate the CC programming accuracy (|I1 – IL|) and the CC readback accuracy (|I2 – I1|). Compare them with the specified specifications in Table 2-4. Wherein, IL is the low current value of the input channel.

(2) Measure the CC programming accuracy and readback accuracy when the current setting value is a rated value.

a) Power on DL3031A. Send the following commands via the remote interface to set the current of the input channel, and then enable the channel input.

:SOUR:CURR:RANG 6 :SOUR:CURR:LEV:IMM 6 :SOUR:INP:STAT 1

/Sets the current range of the electronic load to 6 A./ /Sets the input current of the electronic load to 6 A./ /Enables the channel input./

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Chapter 2 Specifications Test

b) Turn on the digital multimeter. Select the DC voltage (DCV) measurement function and set the range to “Auto”. Make sure that the electronic load works in CC mode. Read the digital multimeter and record the reading (U2) of the digital multimeter. Calculate the current value (I3 = U2/RM).
c) Send the :MEAS:CURR? command via the remote interface, read and record the returned current value (I4) of the query command.
d) Calculate the CC programming accuracy (|I3 – I0|) and the CC readback accuracy (|I4 – I3|). Compare them with the specified specifications in Table 2-4. Wherein, I0 is the rated current value of the input channel.
7. Send the following command via the remote interface to disable the channel input.
:SOUR:INP:STAT 0 /Disables the channel input./

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Test Record Forms:

Table 2-1 Test Record Form of DL3021 CC Programming Accuracy and Readback Accuracy

Model

DL3021 (150 V/40 A)

The current range is 40 A.

Specification

Programming Accuracy Readback Accuracy

±(0.1%+0.04 A) ±(0.1%+0.04 A)

DL3021 Setting

Current

IL[1]

U1 I1=U1/RM[2]

Test Result

I2

Programming Accuracy: |I1 – IL[1]|

Readback Accuracy: |I2 – I1|

DL3021 Setting

Current

I0[3]

U2 I3=U2/RM[2]

Test Result

I4 Programming Accuracy: |I3 – I0[3]|
Readback Accuracy: |I4 – I3|

The current range is 4 A.

Specification

Programming Accuracy Readback Accuracy

±(0.1%+0.004 A) ±(0.1%+0.004 A)

DL3021 Setting

Current

IL[1]

U1

I1=U1/RM[2]

Test Result

I2 Programming Accuracy: |I1 – IL[1]|

Readback Accuracy: |I2 – I1|

DL3021 Setting

Current

I0[3]

U2

I3=U2/RM[2]

Test Result

I4 Programming Accuracy: |I3 – I0[3]|

Readback Accuracy: |I4 – I3|
Note[1]: indicates the low current value of the input channel. Note[2]: RM = 0.01 . Note[3]: indicates the rated current of the input channel.

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Chapter 2 Specifications Test

Table 2-2 Test Record Form of DL3021A CC Programming Accuracy and Readback Accuracy

Model

DL3021A (150 V/40 A)

The current range is 40 A.

Specification

Programming Accuracy Readback Accuracy

±(0.05%+0.02 A) ±(0.05%+0.02 A)

DL3021A Setting

Current

IL[1]

U1 I1=U1/RM[2]

Test Result

I2 Programming Accuracy: |I1 – IL[1]|

Readback Accuracy: |I2 – I1|

DL3021A Setting

Current

I0[3]

U2 I3=U2/RM[2]

Test Result

I4 Programming Accuracy: |I3 – I0[3]|

Readback Accuracy: |I4 – I3|

The current range is 4 A.

Specification

Programming Accuracy Readback Accuracy

±(0.05%+0.002 A) ±(0.05%+0.002 A)

DL3021A Setting

Current

IL[1]

U1 I1=U1/RM[2]

Test Result

I2 Programming Accuracy: |I1 – IL[1]|

Readback Accuracy: |I2 – I1|

DL3021A Setting

Current

I0[3]

U2 I3=U2/RM[2]

Test Result

I4 Programming Accuracy: |I3 – I0[3]|

Readback Accuracy: |I4 – I3|
Note[1]: indicates the low current value of the input channel. Note[2]: RM = 0.01 . Note[3]: indicates the rated current of the input channel.

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Table 2-3 Test Record Form of DL3031 CC Programming Accuracy and Readback Accuracy

Model

DL3031 (150 V/60 A)

The current range is 60 A.

Specification

Programming Accuracy Readback Accuracy

±(0.1%+0.06 A) ±(0.1%+0.06 A)

DL3031 Setting

Current

IL[1]

U1 I1=U1/RM[2]

Test Result

I2 Programming Accuracy: |I1 – IL[1]|

Readback Accuracy: |I2 – I1|

DL3031 Setting

Current

I0[3]

U2 I3=U2/RM[2]

Test Result

I4 Programming Accuracy: |I3 – I0[3]|

Readback Accuracy: |I4 – I3|

The current range is 6 A.

Specification

Programming Accuracy Readback Accuracy

±(0.1%+0.006 A) ±(0.1%+0.006 A)

DL3031 Setting

Current

IL[1]

U1 I1=U1/RM[2]

Test Result

I2 Programming Accuracy: |I1 – IL[1]|

Readback Accuracy: |I2 – I1|

DL3031 Setting

Current

I0[3]

U2 I3=U2/RM[2]

Test Result

I4 Programming Accuracy: |I3 – I0[3]|

Readback Accuracy: |I4 – I3|
Note[1]: indicates the low current value of the input channel. Note[2]: RM = 0.01 . Note[3]: indicates the rated current of the input channel.

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Table 2-4 Test Record Form of DL3031A CC Programming Accuracy and Readback Accuracy

Model

DL3031A (150 V/60 A)

The current range is 60 A.

Specification

Programming Accuracy Readback Accuracy

±(0.05%+0.03 A) ±(0.05%+0.03 A)

DL3031A Setting

Current

IL[1]

U1 I1=U1/RM[2]

Test Result

I2 Programming Accuracy: |I1 – IL[1]|

Readback Accuracy: |I2 – I1|

DL3031A Setting

Current

I0[3]

U2 I3=U2/RM[2]

Test Result

I4 Programming Accuracy: |I3 – I0[3]|

Readback Accuracy: |I4 – I3|

The current range is 6 A.

Specification

Programming Accuracy Readback Accuracy

±(0.05%+0.003 A) ±(0.05%+0.003 A)

DL3031A Setting

Current

IL[1]

U1 I1=U1/RM[2]

Test Result

I2 Programming Accuracy: |I1 – IL[1]|

Readback Accuracy: |I2 – I1|

DL3031A Setting

Current

I0[3]

U2 I3=U2/RM[2]

Test Result

I4 Programming Accuracy: |I3 – I0[3]|

Readback Accuracy: |I4 – I3|
Note[1]: indicates the low current value of the input channel. Note[2]: RM = 0.01 . Note[3]: indicates the rated current of the input channel.

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CV Programming Accuracy and Readback Accuracy
Preparations
Before performing the test, select the appropriate AC voltage via the “AC Selector” on the rear panel of the electronic load according to the AC voltage standard of your country (230 Vac is taken as an example in all the tests in this manual). At room temperature (25), connect the recommended devices specified in “Recommended Test Devices” according to the connection method in Figure 2-2. During the test process, please set the AC voltage according to the selected voltage in “AC Selector” on the rear panel of the electronic load.

AC Power Supply

DL3000

–

+ Digital Multimeter/ – Digital Oscilloscope/
RMS Voltmeter

–

DC Power

Supply

Figure 2-2 CV Test Connection
Note: In case of large current input, please use Sense terminal to compensate the voltage drop on the lead of the load.

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Test Procedures

CV programming accuracy refers to the error between the voltage setting of the channel and the actual input voltage value when the electronic load is in CV mode. CV readback accuracy refers to the error between the readback voltage value and the actual input voltage value when the electronic load is in CV mode.

The following section takes DL3031A as an example to test the CV programming accuracy and readback accuracy of the DL3000 series.

Note: During the test, please select the corresponding test record form according to the model of the DL3000 series under test to set the corresponding parameters, record and calculate the corresponding specifications.

Specification:

Annual Accuracy[1] (25 ± 5), ±(% of Output + Offset)

Programming

±(0.05%+0.025%FS[1])

Readback Value ±(0.05%+0.02%FS[1])

Note[1]: The accuracy specifications are acquired through calibration at 25 after 1-hour warm-up. Note[2]: FS indicates the full scale.

Test Procedures: 1. Power off DL3031A. Connect DL3031A, AC power supply, DC power supply, and
a digital multimeter according to Figure 2-2 (Pay attention to the connection method for the channel input terminals of DL3031A and the digital multimeter). Connect the USB DEVICE interface on the rear panel of the electronic load to the PC via the USB cable.

2. Turn on the AC power supply, and then set its voltage to 230 V, the frequency to 50 Hz. Then, turn on the output.

Note: The voltage setting of the AC power supply should be matched with the AC voltage selector on the rear panel of DL3031A.

3. Power on DL3031A, and restores all the settings of the electronic load to its factory default settings.

4. Turn on the DC power supply, and set its output voltage to 152 V and output current to 0.1 A.

5. Measure the CV programming accuracy and readback accuracy when the voltage range is 150 V.

(1) Measure the CV programming accuracy and readback accuracy when the voltage setting value is a low value.

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a) Power on DL3031A. Send the following commands via the remote interface to set the voltage of the input channel, and then enable the channel input.

:SOUR:VOLT:RANG 150 :SOUR:VOLT:LEV:IMM 18 :SOUR:INP:STAT 1

/Sets the voltage range of the electronic load to 150 V./ /Sets the input voltage of the electronic load to 18 V./ /Enables the channel input./

b) Turn on the digital multimeter. Select the DC voltage (DCV) measurement function and set the range to “Auto”. Make sure that the electronic load works in CV mode. Read the digital multimeter and record the reading (U1) of the digital multimeter.

c) Send the :MEAS:VOLT? command via the remote interface, read and record the returned voltage value (U2) of the query command.
d) Calculate the CV programming accuracy (|U1 – UL|) and the CV readback accuracy (|U2 – U1|). Compare them with the specified specifications in Table 2-8. Wherein, UL is the low current value of the input channel.

(2) Measure the CV programming accuracy and readback accuracy when the voltage setting value is a rated value.

a) Power on DL3031A. Send the following commands via the remote interface to set the voltage of the input channel, and then enable the channel input.

:SOUR:VOLT:RANG 150 :SOUR:VOLT:LEV:IMM 150 :SOUR:INP:STAT 1

/Sets the voltage range of the electronic load to 150 V./ /Sets the input voltage of the electronic load to 150 V./ /Enables the channel input./

b) Turn on the digital multimeter. Select the DC voltage (DCV) measurement function and set the range to “Auto”. Make sure that the electronic load works in CV mode. Read the digital multimeter and record the reading (U3) of the digital multimeter.

c) Send the :MEAS:VOLT? command via the remote interface, read and record the returned voltage value (U4) of the query command.
d) Calculate the CV programming accuracy (|U3 – U0|) and the CV readback accuracy (|U4 – U3|). Compare them with the specified

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specifications in Table 2-8. Wherein, U0 is the rated voltage value of the input channel.

6. Measure the CV programming accuracy and readback accuracy when the voltage range is 15 V.

(1) Measure the CV programming accuracy and readback accuracy when the voltage setting value is a low value.

a) Power on DL3031A. Send the following commands via the remote interface to set the voltage of the input channel, and then enable the channel input.

:SOUR:VOLT:RANG 15 :SOUR:VOLT:LEV:IMM 4 :SOUR:INP:STAT 1

/Sets the voltage range of the electronic load to 15 V./ /Sets the input voltage of the electronic load to 4 V./ /Enables the channel input./

b) Turn on the digital multimeter. Select the DC voltage (DCV) measurement function and set the range to “Auto”. Make sure that the electronic load works in CV mode. Read the digital multimeter and record the reading (U1) of the digital multimeter.
c) Send the :MEAS:VOLT? command via the remote interface, read and record the returned voltage value (U2) of the query command.
d) Calculate the CV programming accuracy (|U1 – UL|) and the CV readback accuracy (|U2 – U1|). Compare them with the specified specifications in Table 2-8. Wherein, UL is the low current value of the input channel.

(2) Measure the CV programming accuracy and readback accuracy when the voltage setting value is a rated value.

a) Power on DL3031A. Send the following commands via the remote interface to set the voltage of the input channel, and then enable the channel input.

:SOUR:VOLT:RANG 15 :SOUR:VOLT:LEV:IMM 15 :SOUR:INP:STAT 1

/Sets the voltage range of the electronic load to 15 V./ /Sets the input voltage of the electronic load to 15 V./ /Enables the channel input./

b) Turn on the digital multimeter. Select the DC voltage (DCV)

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measurement function and set the range to “Auto”. Make sure that the electronic load works in CV mode. Read the digital multimeter and record the reading (U3) of the digital multimeter.
c) Send the :MEAS:VOLT? command via the remote interface, read and record the returned voltage value (U4) of the query command.
d) Calculate the CV programming accuracy (|U3 – U0|) and the CV readback accuracy (|U4 – U3|). Compare them with the specified specifications in Table 2-8. Wherein, U0 is the rated voltage value of the input channel.
7. Send the following command via the remote interface to disable the channel input.
:SOUR:INP:STAT 0 /Disables the channel input./

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Test Record Forms:

Table 2-5 Test Record Form of DL3021 CV Programming Accuracy and Readback Accuracy

Model

DL3021 (150 V/40 A)

The voltage range is 150 V.

Specification

Programming Accuracy Readback Accuracy

±(0.05%+0.03 V) ±(0.05%+0.03 V)

DL3021 Setting

Voltage

UL[1]

U1

Test Result

U2 Programming Accuracy: |U1 – UL[1]|

Readback Accuracy: |U2 – U1|

DL3021 Setting

Voltage

U0[2]

U3

Test Result

U4 Programming Accuracy: |U3 – U0[2]|

Readback Accuracy: |U4 – U3| The voltage range is 15 V.

Specification

Programming Accuracy Readback Accuracy

±(0.05%+0.003 V) ±(0.05%+0.003 V)

DL3021 Setting

Voltage

UL[1]

U1

Test Result

U2 Programming Accuracy: |U1 – UL[1]|

Readback Accuracy: |U2 – U1|

DL3021 Setting

Voltage

U0[2]

U3

Test Result

U4 Programming Accuracy: |U3 – U0[2]|

Readback Accuracy: |U4 – U3|
Note[1]: indicates the low voltage value of the input channel.
Note[2]: indicates the rated voltage of the input channel.

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Table 2-6 Test Record Form of DL3021A CV Programming Accuracy and Readback Accuracy

Model

DL3021A (150 V/40 A)

The voltage range is 150 V.

Specification

Programming Accuracy Readback Accuracy

±(0.05%+0.0375 V) ±(0.05%+0.03 V)

DL3021A Setting

Voltage

UL[1]

U1

Test Result

U2 Programming Accuracy: |U1 – UL[1]|

Readback Accuracy: |U2 – U1|

DL3021A Setting

Voltage

U0[2]

U3

Test Result

U4 Programming Accuracy: |U3 – U0[2]|

Readback Accuracy: |U4 – U3|

The voltage range is 15 V.

Specification

Programming Accuracy Readback Accuracy

±(0.05%+0.00375 V) ±(0.05%+0.003 V)

DL3021A Setting

Voltage

UL[1]

U1

Test Result

U2 Programming Accuracy: |U1 – UL[1]|

Readback Accuracy: |U2 – U1|

DL3021A Setting

Voltage

U0[2]

U3

Test Result

U4 Programming Accuracy: |U3 – U0[2]|

Readback Accuracy: |U4 – U3|
Note[1]: indicates the low voltage value of the input channel.
Note[2]: indicates the rated voltage of the input channel.

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Table 2-7 Test Record Form of DL3031 CV Programming Accuracy and Readback Accuracy

Model

DL3031 (150 V/60 A)

The voltage range is 150 V.

Specification

Programming Accuracy Readback Accuracy

±(0.05%+0.03 V) ±(0.05%+0.03 V)

DL3031 Setting

Voltage

UL[1]

U1

Test Result

U2 Programming Accuracy: |U1 – UL[1]|

Readback Accuracy: |U2 – U1|

DL3031 Setting

Voltage

U0[2]

U3

Test Result

U4 Programming Accuracy: |U3 – U0[2]|

Readback Accuracy: |U4 – U3|

The voltage range is 15 V.

Specification

Programming Accuracy Readback Accuracy

±(0.05%+0.003 V) ±(0.05%+0.003 V)

DL3031 Setting

Voltage

UL[1]

U1

Test Result

U2 Programming Accuracy: |U1 – UL[1]|

Readback Accuracy: |U2 – U1|

DL3031 Setting

Voltage

U0[2]

U3

Test Result

U4 Programming Accuracy: |U3 – U0[2]|

Readback Accuracy: |U4 – U3|
Note[1]: indicates the low voltage value of the input channel.
Note[2]: indicates the rated voltage of the input channel.

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Table 2-8 Test Record Form of DL3031A CV Programming Accuracy and Readback Accuracy

Model

DL3031A (150 V/60 A)

The voltage range is 150 V.

Specification

Programming Accuracy Readback Accuracy

±(0.05%+0.0375 V) ±(0.05%+0.03 V)

DL3031A Setting

Voltage

UL[1]

U1

Test Result

U2 Programming Accuracy: |U1 – UL[1]|

Readback Accuracy: |U2 – U1|

DL3031A Setting

Voltage

U0[2]

U3

Test Result

U4 Programming Accuracy: |U3 – U0[2]|

Readback Accuracy: |U4 – U3|

The voltage range is 15 V.

Specification

Programming Accuracy Readback Accuracy

±(0.05%+0.00375 V) ±(0.05%+0.003 V)

DL3031A Setting

Voltage

UL[1]

U1

Test Result

U2 Programming Accuracy: |U1 – UL[1]|

Readback Accuracy: |U2 – U1|

DL3031A Setting

Voltage

U0[2]

U3

Test Result

U4 Programming Accuracy: |U3 – U0[2]|

Readback Accuracy: |U4 – U3|
Note[1]: indicates the low voltage value of the input channel.
Note[2]: indicates the rated voltage of the input channel.

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CR Programming Accuracy
Preparations
Before performing the test, select the appropriate AC voltage via the “AC Selector” on the rear panel of the electronic load according to the AC voltage standard of your country (230 Vac is taken as an example in all the tests in this manual). At room temperature (25), connect the recommended devices specified in “Recommended Test Devices” according to the connection method in Figure 2-3. During the test process, please set the AC voltage according to the selected voltage in “AC Selector” on the rear panel of the electronic load.
In the CR tests, a current sampling resistor (required to be calibrated) should be serially connected between the DC power supply and the electronic load. It is used to convert the current signal under test to the voltage signal for the measurement of related parameters.

AC Power Supply

DL3000

–

+ Digital Multimeter/
– Digital Oscilloscope/ RMS Voltmeter

+ Digital Multimeter/

RM

– Digital Oscilloscope/

RMS Voltmeter

–

DC Power

Supply

Figure 2-3 CR Test Connection
Note: In case of large current input, please use Sense terminal to compensate the voltage drop on the lead of the load.

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Test Procedures

CR programming accuracy refers to the error between the resistance setting of the channel and the actual resistance value when the electronic load is in CR mode.

The following section takes DL3031A as an example to test the CR programming accuracy of the DL3000 series.

Note: During the test, please select the corresponding test record form according to the model of the DL3000 series under test to set the corresponding parameters, record and calculate the corresponding specifications.

Specification:

Annual Accuracy[1] (25 ± 5), ±(% of Output + Offset)

Programming

Vin/Rset*(0.2%)+0.2%IFS[2]

Note[1]: The accuracy specifications are acquired through calibration at 25 after 1-hour warm-up. Note[2]: FS indicates the full scale.

Test Procedures: 1. Power off DL3031A. Connect DL3031A, AC power supply, DC power supply, a
current sampling resistor (with a resistance RM 0.01 ), and a digital multimeter according to Figure 2-3 (Pay attention to the connection method for the current sampling resistor, the channel input terminals of DL3031A, and the digital multimeter). Connect the USB DEVICE interface on the rear panel of the electronic load to the PC via the USB cable.

2. Turn on the AC power supply, and then set its voltage to 230 V, the frequency to 50 Hz. Then, turn on the output.

Note: The voltage setting of the AC power supply should be matched with the AC voltage selector on the rear panel of DL3031A.

3. Power on DL3031A, and restores all the settings of the electronic load to its factory default settings.

4. Turn on the DC power supply, and set its output voltage to 30 V and output current to 15 A.

5. Measure the CR programming accuracy when the resistance range is a low range (0.08 to 15 ).
(1) Measure the CR programming accuracy when the resistance is set to a low value.

a) Power on DL3031A. Send the following commands via the remote

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interface to set the resistance, and then enable the channel input.

:SOUR:RES:RANG 15
:SOUR:RES:LEV:IMM 0.125 :SOUR:INP:STAT 1

/Sets the resistance range of the electronic
to a low range (0.08 to 15 )./ /Sets the resistance value of the electronic
load to 0.125 ./ /Enables the channel input./

b) Turn on the digital multimeter. Select the DC voltage (DCV) measurement function and set the range to “Auto”. Make sure that the electronic load works in CR mode. Read the digital multimeter and record the reading (U1 and U2) of the digital multimeter. Wherein, U1 is the input voltage of the electronic load, and U2 is the voltage of the current sampling resistance. Calculate the resistance of the electronic load according to the formula: R1 = U1/(U2/RM).
c) Calculate the CR programming accuracy |R1 – RL|. Compare it with the specified specifications in Table 2-12. Wherein, RL is the low resistance value.

(2) Measure the CR programming accuracy when the resistance is set to a high value.

a) Power on DL3031A. Send the following commands via the remote interface to set the resistance, and then enable the channel input.

:SOUR:RES:RANG 15
:SOUR:RES:LEV:IMM 15 :SOUR:INP:STAT 1

/Sets the resistance range of the electronic
load to a low range (0.08 to 15 )./ /Sets the resistance value of the electronic
load to 15 ./ /Enables the channel input./

b) Turn on the digital multimeter. Select the DC voltage (DCV) measurement function and set the range to “Auto”. Make sure that the electronic load works in CR mode. Read the digital multimeter and record the reading (U3 and U4) of the digital multimeter. Wherein, U3 is the input voltage of the electronic load, and U4 is the voltage of the current sampling resistance. Calculate the resistance of the electronic load according to the formula: R2 = U3/(U4/RM).
c) Calculate the CR programming accuracy |R2 – RH|. Compare it with the specified specifications in Table 2-12. Wherein, RH is the high resistance value.

6. Measure the CR programming accuracy when the resistance range is a high range (2 to 15 k).

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(1) Measure the CR programming accuracy when the resistance is set to a low value.

a) Power on DL3031A. Send the following commands via the remote interface to set the resistance, and then enable the channel input.

:SOUR:RES:RANG 15000 :SOUR:RES:LEV:IMM 18 :SOUR:INP:STAT 1

/Sets the resistance range of the electronic
load to a high range (2 to 15 k)./ /Sets the resistance value of the electronic
load to 18 ./ /Enables the channel input./

b) Turn on the digital multimeter. Select the DC voltage (DCV) measurement function and set the range to “Auto”. Make sure that the electronic load works in CR mode. Read the digital multimeter and record the reading (U1 and U2) of the digital multimeter. Wherein, U1 is the input voltage of the electronic load, and U2 is the voltage of the current sampling resistance. Calculate the resistance of the electronic load according to the formula: R1 = U1/(U2/RM).
c) Calculate the CR programming accuracy |R1 – RL|. Compare it with the specified specifications in Table 2-12. Wherein, RL is the low resistance value.

(2) Measure the CR programming accuracy when the resistance is set to a high value.

a) Power on DL3031A. Send the following commands via the remote interface to set the resistance of the input channel, and then enable the channel input.

:SOUR:RES:RANG 15000 :SOUR:RES:LEV:IMM 15000 :SOUR:INP:STAT 1

/Sets the resistance range of the electronic
load to a high range (2 to 15 k)./ /Sets the resistance value of the electronic
load to 15000 ./ /Enables the channel input./

b) Turn on the digital multimeter. Select the DC voltage (DCV) measurement function and set the range to “Auto”. Make sure that the electronic load works in CR mode. Read the digital multimeter and record the reading (U3 and U4) of the digital multimeter. Wherein, U3 is the input voltage of the electronic load, and U4 is the voltage of the current sampling resistance. Calculate the resistance of the electronic load according to the formula: R2 = U3/(U4/RM).
c) Calculate the CR programming accuracy |R2 – RH|. Compare it with the

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specified specifications in Table 2-12. Wherein, RH is the high resistance value.
7. Send the following command via the remote interface to disable the channel input.
:SOUR:INP:STAT 0 /Disables the channel input./

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Test Record Forms:

Table 2-9 Test Record Form of DL3021 CR Programming Accuracy

Model

DL3021 (150 V/40 A)

The resistance range of the electronic load is from 0.08 to 15 .

Specification

Programming Accuracy

Vin/Rset*(0.2%)+0.08 A

DL3021 Setting

Resistance

RL[1]

U1

Test Result DL3021 Setting

U2 R1=U1/(U2/RM[2]) Programming Accuracy: |R1 – RL[1]|
Resistance

RH[3]

U3

Test Result

U4 R2=U3/(U4/RM[2]) Programming Accuracy: |R3 – RH[3]|

The resistance range of the electronic load is from 2 to 15 k.

Specification

Programming Accuracy

Vin/Rset*(0.2%)+0.08 A

DL3021 Setting

Resistance

RL[1]

Test Result DL3021 Setting

U1 U2 R1=U1/(U2/RM[2]) Programming Accuracy: |R1 – RL[1]| Resistance

RH[3]

U3

Test Result

U4 R2=U3/(U4/RM[2])

Programming Accuracy: |R3 – RH[3]|
Note[1]: indicates the set low resistance value. Note[2]: RM = 0.01 . Note[3]: indicates the set high resistance value.

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Table 2-10 Test Record Form of DL3021A CR Programming Accuracy

Model

DL3021A (150 V/40 A)

The resistance range of the electronic load is from 0.08 to 15 .

Specification

Programming Accuracy

Vin/Rset*(0.2%)+0.08 A

DL3021A Setting

Resistance

RL[1]

U1

Test Result DL3021A Setting

U2 R1=U1/(U2/RM[2]) Programming Accuracy: |R1 – RL[1]|
Resistance

RH[3]

U3

Test Result

U4 R2=U3/(U4/RM[2]) Programming Accuracy: |R3 – RH[3]|

The resistance range of the electronic load is from 2 to 15 k.

Specification

Programming Accuracy

Vin/Rset*(0.2%)+0.08 A

DL3021A Setting

Resistance

RL[1]

U1

Test Result DL3021A Setting

U2 R1=U1/(U2/RM[2]) Programming Accuracy: |R1 – RL[1]|
Resistance

RH[3]

U3

Test Result

U4 R2=U3/(U4/RM[2])

Programming Accuracy: |R3 – RH[3]|
Note[1]: indicates the set low resistance value. Note[2]: RM = 0.01 . Note[3]: indicates the set high resistance value.

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Table 2-11 Test Record Form of DL3031 CR Programming Accuracy

Model

DL3031 (150 V/60 A)

The resistance range of the electronic load is from 0.08 to 15 .

Specification

Programming Accuracy

Vin/Rset*(0.2%)+0.12 A

DL3031 Setting

Resistance

RL[1]

U1

Test Result DL3031 Setting

U2 R1=U1/(U2/RM[2]) Programming Accuracy: |R1 – RL[1]|
Resistance

RH[3]

U3

Test Result

U4 R2=U3/(U4/RM[2]) Programming Accuracy: |R3 – RH[3]|

The resistance range of the electronic load is from 2 to 15 k.

Specification

Programming Accuracy

Vin/Rset*(0.2%)+0.12 A

DL3031 Setting

Resistance

RL[1]

U1

Test Result DL3031 Setting

U2 R1=U1/(U2/RM[2]) Programming Accuracy: |R1 – RL[1]|
Resistance

RH[3]

U3

Test Result

U4 R2=U3/(U4/RM[2])

Programming Accuracy: |R3 – RH[3]|
Note[1]: indicates the set low resistance value. Note[2]: RM = 0.01 . Note[3]: indicates the set high resistance value.

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Table 2-12 Test Record Form of DL3031A CR Programming Accuracy

Model

DL3031A (150 V/60 A)

The resistance range of the electronic load is from 0.08 to 15 .

Specification

Programming Accuracy

Vin/Rset*(0.2%)+0.12 A

DL3031A Setting

Resistance

RL[1]

U1

Test Result DL3031A Setting

U2 R1=U1/(U2/RM[2]) Programming Accuracy: |R1 – RL[1]|
Resistance

RH[3]

U3

Test Result

U4 R2=U3/(U4/RM[2]) Programming Accuracy: |R3 – RH[3]|

The resistance range of the electronic load is from 2 to 15 k.

Specification

Programming Accuracy

Vin/Rset*(0.2%)+0.12 A

DL3031A Setting

Resistance

RL[1]

U1

Test Result DL3031A Setting

U2 R1=U1/(U2/RM[2]) Programming Accuracy: |R1 – RL[1]|
Resistance

RH[3]

U3

Test Result

U4 R2=U3/(U4/RM[2])

Programming Accuracy: |R3 – RH[3]|
Note[1]: indicates the set low resistance value. Note[2]: RM = 0.01 . Note[3]: indicates the set high resistance value.

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Appendix

Appendix A: Test Record Forms
DL3021 Performance Verification Test Record Form
RIGOL DL3021 Programmable DC Electronic Load Performance Verification Test Record Form

CC Programming Accuracy and Readback Accuracy

Model

The current range is 40 A.

Specification

Programming Accuracy Readback Accuracy

DL3021 Setting

Current

U1 I1=U1/RM[2]

Test Result

I2 Programming Accuracy: |I1 – IL[1]|

Readback Accuracy: |I2 – I1|

DL3021 Setting

Current

U2 I3=U2/RM[2]

Test Result

I4 Programming Accuracy: |I3 – I0[3]|

Readback Accuracy: |I4 – I3|

The current range is 4 A.

Specification

Programming Accuracy Readback Accuracy

DL3021 Setting

Current

U1 I1=U1/RM[2]

Test Result

I2 Programming Accuracy: |I1 – IL[1]|

Readback Accuracy: |I2 – I1|

DL3021 Setting

Current

Test Result

U2 I3=U2/RM[2]

DL3021 (150 V/40 A) ±(0.1%+0.04 A) ±(0.1%+0.04 A) IL[1] I0[3] ±(0.1%+0.004 A) ±(0.1%+0.004 A)
IL[1] I0[3]

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I4 Programming Accuracy: |I3 – I0[3]|
Readback Accuracy: |I4 – I3|

CV Programming Accuracy and Readback Accuracy

Model

The voltage range is 150 V.

Specification

Programming Accuracy Readback Accuracy

DL3021 Setting

Voltage

U1

Test Result

U2 Programming Accuracy: |U1 – UL[4]|

Readback Accuracy: |U2 – U1|

DL3021 Setting

Voltage

U3

Test Result

U4 Programming Accuracy: |U3 – U0[5]|

Readback Accuracy: |U4 – U3|

The voltage range is 15 V.

Specification

Programming Accuracy Readback Accuracy

DL3021 Setting

Voltage

U1

Test Result

U2 Programming Accuracy: |U1 – UL[4]|

Readback Accuracy: |U2 – U1|

DL3021 Setting

Voltage

U3

Test Result

U4 Programming Accuracy: |U3 – U0[5]|

Readback Accuracy: |U4 – U3|

Appendix
DL3021 (150 V/40 A) ±(0.05%+0.03 V) ±(0.05%+0.03 V) UL[4] U0[5] ±(0.05%+0.003 V) ±(0.05%+0.003 V)
UL[4] U0[5]

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CR Programming Accuracy

Model

DL3021 (150 V/40 A)

The resistance range of the electronic load is from 0.08 to 15 .

Specification

Programming Accuracy

Vin/Rset*(0.2%)+0.08 A

DL3021 Setting

Resistance

RL[6]

U1

Test Result DL3021 Setting

U2 R1=U1/(U2/RM[2]) Programming Accuracy: |R1 – RL[6]|
Resistance

RH[7]

U3

Test Result

U4 R2=U3/(U4/RM[2]) Programming Accuracy: |R3 – RH[7]|

The resistance range of the electronic load is from 2 to 15 k.

Specification

Programming Accuracy

Vin/Rset*(0.2%)+0.08 A

DL3021 Setting

Resistance

RL[6]

U1

Test Result DL3021 Setting

U2 R1=U1/(U2/RM[2]) Programming Accuracy: |R1 – RL[6]|
Resistance

RH[7]

U3

Test Result

U4 R2=U3/(U4/RM[2])

Programming Accuracy: |R3 – RH[7]|

Note[1]: indicates the low current value of the input channel.
Note[2]: RM = 0.01 .
Note[3]: indicates the rated current of the input channel.
Note[4]: indicates the low voltage value of the input channel.
Note[5]: indicates the rated voltage of the input channel.
Note[6]: indicates the set low resistance value.
Note[7]: indicates the set high resistance value.

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Appendix

DL3021A Performance Verification Test Record Form
RIGOL DL3021A Programmable DC Electronic Load Performance Verification Test Record Form

CC Programming Accuracy and Readback Accuracy

Model

The current range is 40 A.

Specification

Programming Accuracy Readback Accuracy

DL3021A Setting

Current

U1 I1=U1/RM[2]

Test Result

I2 Programming Accuracy: |I1 – IL[1]|

Readback Accuracy: |I2 – I1|

DL3021A Setting

Current

U2 I3=U2/RM[2]

Test Result

I4 Programming Accuracy: |I3 – I0[3]|

Readback Accuracy: |I4 – I3|

The current range is 4 A.

Specification

Programming Accuracy Readback Accuracy

DL3021A Setting

Current

U1 I1=U1/RM[2]

Test Result

I2 Programming Accuracy: |I1 – IL[1]|

Readback Accuracy: |I2 – I1|

DL3021A Setting

Current

U2 I3=U2/RM[2]

Test Result

I4 Programming Accuracy: |I3 – I0[3]|

Readback Accuracy: |I4 – I3|

DL3021A (150 V/40 A) ±(0.05%+0.02 A) ±(0.05%+0.02 A) IL[1] I0[3] ±(0.05%+0.002 A) ±(0.05%+0.002 A)
IL[1] I0[3]

4

DL3000 Performance Verification Manual

Appendix

CV Programming Accuracy and Readback Accuracy

Model

The voltage range is 150 V.

Specification

Programming Accuracy Readback Accuracy

DL3021A Setting

Voltage

U1

Test Result

U2 Programming Accuracy: |U1 – UL[4]|

Readback Accuracy: |U2 – U1|

DL3021A Setting

Voltage

U3

Test Result

U4 Programming Accuracy: |U3 – U0[5]|

Readback Accuracy: |U4 – U3|

The voltage range is 15 V.

Specification

Programming Accuracy Readback Accuracy

DL3021A Setting

Voltage

U1

Test Result

U2 Programming Accuracy: |U1 – UL[4]|

Readback Accuracy: |U2 – U1|

DL3021A Setting

Voltage

U3

Test Result

U4 Programming Accuracy: |U3 – U0[5]|

Readback Accuracy: |U4 – U3|

RIGOL DL3021A (150 V/40 A) ±(0.05%+0.0375 V)
±(0.05%+0.03 V) UL[4] U0[5] ±(0.05%+0.00375 V) ±(0.05%+0.003 V) UL[4] U0[5]

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Appendix

CR Programming Accuracy

Model

DL3021A (150 V/40 A)

The resistance range of the electronic load is from 0.08 to 15 .

Specification

Programming Accuracy

Vin/Rset*(0.2%)+0.08 A

DL3021A Setting

Resistance

RL[6]

U1

Test Result DL3021A Setting

U2 R1=U1/(U2/RM[2]) Programming Accuracy: |R1 – RL[6]|
Resistance

RH[7]

U3

Test Result

U4 R2=U3/(U4/RM[2]) Programming Accuracy: |R3 – RH[7]|

The resistance range of the electronic load is from 2 to 15 k.

Specification

Programming Accuracy

Vin/Rset*(0.2%)+0.08 A

DL3021A Setting

Resistance

RL[6]

U1

Test Result DL3021A Setting

U2 R1=U1/(U2/RM[2]) Programming Accuracy: |R1 – RL[6]|
Resistance

RH[7]

U3

Test Result

U4 R2=U3/(U4/RM[2])

Programming Accuracy: |R3 – RH[7]|

Note[1]: indicates the low current value of the input channel.
Note[2]: RM = 0.01 .
Note[3]: indicates the rated current of the input channel.
Note[4]: indicates the low voltage value of the input channel.
Note[5]: indicates the rated voltage of the input channel.
Note[6]: indicates the set low resistance value.
Note[7]: indicates the set high resistance value.

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DL3000 Performance Verification Manual

Appendix

RIGOL

DL3031 Performance Verification Test Record Form
RIGOL DL3031 Programmable DC Electronic Load Performance Verification Test Record Form

CC Programming Accuracy and Readback Accuracy

Model

The current range is 60 A.

Specification

Programming Accuracy Readback Accuracy

DL3031 Setting

Current

U1 I1=U1/RM[2]

Test Result

I2 Programming Accuracy: |I1 – IL[1]|

Readback Accuracy: |I2 – I1|

DL3031 Setting

Current

U2 I3=U2/RM[2]

Test Result

I4 Programming Accuracy: |I3 – I0[3]|

Readback Accuracy: |I4 – I3|

The current range is 6 A.

Specification

Programming Accuracy Readback Accuracy

DL3031 Setting

Current

U1 I1=U1/RM[2]

Test Result

I2 Programming Accuracy: |I1 – IL[1]|

Readback Accuracy: |I2 – I1|

DL3031 Setting

Current

U2 I3=U2/RM[2]

Test Result

I4 Programming Accuracy: |I3 – I0[3]|

Readback Accuracy: |I4 – I3|

DL3031 (150 V/60 A) ±(0.1%+0.06 A) ±(0.1%+0.06 A) IL[1] I0[3] ±(0.1%+0.006 A) ±(0.1%+0.006 A)
IL[1] I0[3]

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CV Programming Accuracy and Readback Accuracy

Model

The voltage range is 150 V.

Specification

Programming Accuracy Readback Accuracy

DL3031 Setting

Voltage

U1

Test Result

U2 Programming Accuracy: |U1 – UL[4]|

Readback Accuracy: |U2 – U1|

DL3031 Setting

Voltage

U3

Test Result

U4 Programming Accuracy: |U3 – U0[5]|

Readback Accuracy: |U4 – U3|

The voltage range is 15 V.

Specification

Programming Accuracy Readback Accuracy

DL3031 Setting

Voltage

U1

Test Result

U2 Programming Accuracy: |U1 – UL[4]|

Readback Accuracy: |U2 – U1|

DL3031 Setting

Voltage

U3

Test Result

U4 Programming Accuracy: |U3 – U0[5]|

Readback Accuracy: |U4 – U3|

Appendix DL3031 (150 V/60 A)
±(0.05%+0.03 V) ±(0.05%+0.03 V)
UL[4] U0[5] ±(0.05%+0.003 V) ±(0.05%+0.003 V)
UL[4] U0[5]

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Appendix

RIGOL

CR Programming Accuracy

Model

DL3031 (150 V/60 A)

The resistance range of the electronic load is from 0.08 to 15 .

Specification

Programming Accuracy

Vin/Rset*(0.2%)+0.12 A

DL3031 Setting

Resistance

RL[6]

U1

Test Result DL3031 Setting

U2 R1=U1/(U2/RM[2]) Programming Accuracy: |R1 – RL[6]|
Resistance

RH[7]

U3

Test Result

U4 R2=U3/(U4/RM[2]) Programming Accuracy: |R3 – RH[7]|

The resistance range of the electronic load is from 2 to 15 k.

Specification

Programming Accuracy

Vin/Rset*(0.2%)+0.12 A

DL3031 Setting

Resistance

RL[6]

U1

Test Result DL3031 Setting

U2 R1=U1/(U2/RM[2]) Programming Accuracy: |R1 – RL[6]|
Resistance

RH[7]

U3

Test Result

U4 R2=U3/(U4/RM[2])

Programming Accuracy: |R3 – RH[7]|

Note[1]: indicates the low current value of the input channel.
Note[2]: RM = 0.01 .
Note[3]: indicates the rated current of the input channel.
Note[4]: indicates the low voltage value of the input channel.
Note[5]: indicates the rated voltage of the input channel.
Note[6]: indicates the set low resistance value.
Note[7]: indicates the set high resistance value.

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Appendix

DL3031A Performance Verification Test Record Form
RIGOL DL3031A Programmable DC Electronic Load Performance Verification Test Record Form

CC Programming Accuracy and Readback Accuracy

Model

The current range is 60 A.

Specification

Programming Accuracy Readback Accuracy

DL3031A Setting

Current

U1 I1=U1/RM[2]

Test Result

I2 Programming Accuracy: |I1 – IL[1]|

Readback Accuracy: |I2 – I1|

DL3031A Setting

Current

U2 I3=U2/RM[2]

Test Result

I4 Programming Accuracy: |I3 – I0[3]|

Readback Accuracy: |I4 – I3|

The current range is 6 A.

Specification

Programming Accuracy Readback Accuracy

DL3031A Setting

Current

U1 I1=U1/RM[2]

Test Result

I2 Programming Accuracy: |I1 – IL[1]|

Readback Accuracy: |I2 – I1|

DL3031A Setting

Current

U2 I3=U2/RM[2]

Test Result

I4 Programming Accuracy: |I3 – I0[3]|

Readback Accuracy: |I4 – I3|

DL3031A (150 V/60 A) ±(0.05%+0.03 A) ±(0.05%+0.03 A) IL[1] I0[3] ±(0.05%+0.003 A) ±(0.05%+0.003 A)
IL[1] I0[3]

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DL3000 Performance Verification Manual

Appendix

CV Programming Accuracy and Readback Accuracy

Model

The voltage range is 150 V.

Specification

Programming Accuracy Readback Accuracy

DL3031A Setting

Voltage

U1

Test Result

U2 Programming Accuracy: |U1 – UL[4]|

Readback Accuracy: |U2 – U1|

DL3031A Setting

Voltage

U3

Test Result

U4 Programming Accuracy: |U3 – U0[5]|

Readback Accuracy: |U4 – U3|

The voltage range is 15 V.

Specification

Programming Accuracy Readback Accuracy

DL3031A Setting

Voltage

U1

Test Result

U2 Programming Accuracy: |U1 – UL[4]|

Readback Accuracy: |U2 – U1|

DL3031A Setting

Voltage

U3

Test Result

U4 Programming Accuracy: |U3 – U0[5]|

Readback Accuracy: |U4 – U3|

RIGOL DL3031A (150 V/60 A)
±(0.05%+0.0375 V) ±(0.05%+0.03 V) UL[4] U0[5] ±(0.05%+0.00375 V) ±(0.05%+0.003 V) UL[4] U0[5]

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Appendix

CR Programming Accuracy

Model

DL3031A (150 V/60 A)

The resistance range of the electronic load is from 0.08 to 15 .

Specification

Programming Accuracy

Vin/Rset*(0.2%)+0.12 A

DL3031A Setting

Resistance

RL[6]

U1

Test Result DL3031A Setting

U2 R1=U1/(U2/RM[2]) Programming Accuracy: |R1 – RL[6]|
Resistance

RH[7]

U3

Test Result

U4 R2=U3/(U4/RM[2]) Programming Accuracy: |R3 – RH[7]|

The resistance range of the electronic load is from 2 to 15 k.

Specification

Programming Accuracy

Vin/Rset*(0.2%)+0.12 A

DL3031A Setting

Resistance

RL[6]

U1

Test Result DL3031A Setting

U2 R1=U1/(U2/RM[2]) Programming Accuracy: |R1 – RL[6]|
Resistance

RH[7]

U3

Test Result

U4 R2=U3/(U4/RM[2])

Programming Accuracy: |R3 – RH[7]|

Note[1]: indicates the low current value of the input channel.
Note[2]: RM = 0.01 .
Note[3]: indicates the rated current of the input channel.
Note[4]: indicates the low voltage value of the input channel.
Note[5]: indicates the rated voltage of the input channel.
Note[6]: indicates the set low resistance value.
Note[7]: indicates the set high resistance value.

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DL3000 Performance Verification Manual

Appendix

RIGOL

Appendix B: Specifications

All the technical specifications are guaranteed when the instrument has been working for more than 30 minutes under the specified operating temperature.

DC Input(0~ 40)

Model

Voltage

DL3021 DL3021A DL3031 DL3031A

0 ~ 150 V 0 ~ 150 V

Current 0 ~ 40 A

Maximum Power
200 W

Minimum Operating Voltage (DC)
40 A@1 V

0 ~ 60 A 350 W

60 A@1.3 V

CC Mode
Model
DL3021 DL3021A DL3031 DL3031A

Range
0 ~ 4 A 0 ~ 40 A 0 ~ 6 A 0 ~ 60 A

Programming Resolution
1 mA
1 mA

Programming Accuracy[1] ±(0.1%+0.1%FS[2]) ±(0.05%+0.05%FS) ±(0.1%+0.1%FS) ±(0.05%+0.05%FS)

Programming Temperature Coefficient 100 ppm/
100 ppm/

CV Mode
Model
DL3021 DL3021A DL3031 DL3031A
CR Mode Model DL3021 DL3021A DL3031 DL3031A

Range

Programming Resolution

0 ~ 15 V 1 mV 0 ~ 150 V 5 mV
0 ~ 15 V 1 mV 0 ~ 150 V 5 mV

Programming Accuracy
±(0.05%+0.02%FS) ±(0.05%+0.025%FS) ±(0.05%+0.02%FS) ±(0.05%+0.025%FS)

Programming Temperature Coefficient 50 ppm/
50 ppm/

Range[3] 0.08 ~15 (0.0667 S~12.5 S) 2 ~15 k (0.0000667 S~0.5 S )
0.08 ~15 (0.0667 S~12.5 S) 2 ~15 k (0.0000667 S~0.5 S )

Programming Resolution 2 mA/Vsense
2 mA/Vsense

Programming Accuracy[4] Vin/Rset(0.2%)+0.2%IFS Vin/Rset(0.2%)+0.2%IFS

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Appendix

CP Mode Model DL3021 DL3021A DL3031 DL3031A Con Mode

Range 0 ~ 200 W 0 ~ 350 W

Model

Frequency Range

DL3021 DL3021A DL3031 DL3031A

0.001 Hz~15 kHz 0.001 Hz~30 kHz 0.001 Hz~15 kHz 0.001 Hz~30 kHz

Resolution 100 mW 100 mW

Frequency Resolution

Frequency Accuracy

Duty Cycle Range

0.8%

±0.5%

5%~95%, 1%

Current Slew Rate[5]

Model

Range

DL3021 DL3021A DL3031 DL3031A

0.001 A/s~0.25 A/s 0.001 A/s~2.5 A/s (>5 V)[6] 0.001 A/s~0.3 A/s 0.001 A/s~3 A/s (>5 V)
0.001 A/s~0.25 A/s 0.001 A/s~2.5 A/s (>5 V)
0.001 A/s~0.5 A/s 0.001 A/s~5 A/s (>5 V)

Resolution 0.001 A/s 0.001 A/s

Accuracy 5%+10 s 5%+10 s

Current Readback

Model

Range

DL3021 DL3021A

0 ~ 40 A

DL3031 DL3031A

0 ~ 60 A

Resolution 1 mA 0.1 mA 1 mA 0.1 mA

Accuracy ±(0.1%+0.1%FS) ±(0.05%+0.05%FS) ±(0.1%+0.1%FS) ±(0.05%+0.05%FS)

Temperature Coefficient 50 ppm/ 50 ppm/

Voltage Readback

Model

Range

DL3021 DL3021A

0 ~ 150 V

DL3031 DL3031A

0 ~ 150 V

Resolution 0.1 mV 0.1 mV

Accuracy ±(0.05%+0.02%FS) ±(0.05%+0.02%FS)

Temperature Coefficient 20 ppm/ 20 ppm/

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DL3000 Performance Verification Manual

Appendix

RIGOL

Resistance Readback

Model

Range

DL3021 DL3021A

0.08 ~15 k (0.0667 S~0.5 S)

DL3031 DL3031A

0.08 ~15 k (0.0667 S~0.5 S)

Resolution 2 mA/Vsense 2 mA/Vsense

Power Readback

Model

Range

DL3021 DL3021A

0 ~ 200 W

DL3031 DL3031A

0 ~ 350 W

Resolution 100 mW 100 mW

Protection Function
Overcurrent protection (OCP), overvoltage protection (OVP), overpower protection (OPP), overtemperature protection (OTP), as well as local/remote reverse voltage (LRV/RRV) protection.

Stability[7] Model DL3021 DL3021A DL3031 DL3031A

Current ±(0.01%±10 mA) ±(0.01%±10 mA)

Voltage ±(0.01%±10 mV) ±(0.01%±10 mV)

Input Resistance 350 k

Mechanical Dimensions Weight

239 mm(W) x 157 mm(H) x 442 mm(D) Net weight: 7.58 kg

Power AC Input (50 Hz~60 Hz) Maximum Input Power

115 Vac±10%, 230 Vac±10% (max: 250 Vac) <30 VA

Interface USB Device Interface USB HOST LAN Interface

1 1 1 (optional)

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Appendix

RS232 Digital I/O GPIB

1 1 (optional) 1 (optional, USB-GPIB interface converter)

Environment Cooling Method Operating Temperature Storage Temperature
Humidity Altitude

Fan Cooled
0~40 -40~70 5% to 80% RH (without condensation) Below 2,000 m

Certification Information

Complies with the requirements of the following directive and

standards:

EMC Directive 2014/30/EU

EN 61326-1

EMC

EN 61000-3-2

EN 61000-3-3

Under following condition: The maximum length of all connecting cables and wires to the DL3000 series are less than 3 m.

Safety

Complies with the requirements of the following directive and standards: Low Voltage Directive 2014/35/EU EN 61010-1: 2010 IP Degree: IP20 Pollution Degree: PD 2 Over Voltage Category: OVC II Operation Location: Indoor use only; not for wet condition

Note[1]: Data measured after 30-second current sinking at the programming value (applicable to
the programming accuracy in CC mode and CV mode). Note[2]: FS indicates the full scale. Note[3]: The input voltage for the low range in CR mode should be smaller than 8 V. Note[4]: The programming accuracy in CR mode is also determined by the input voltage accuracy. Note[5]: Current slew rate: rising slew rate for 10%~90% of the current (0-maximum current). Note[6]: When the input voltage is greater than 5 V, the maximum current slew rate is 5 A/s;
when the input voltage is greater than 4 V, the maximum current slew rate is 2.5 A/s; when the input voltage is greater than 2 V, the maximum current slew rate is 0.1 A/s. Note[7]: Following a steady 30-minute current sinking, change in current/voltage sinking over 8
hours under constant load, line, and ambient temperature.

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DL3000 Performance Verification Manual

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