Rigol DL3000 Series User manual

RIGOL
Performance Verification Manual
DL3000 Series Programmable DC
Electronic Load
Feb. 2018
RIGOL TECHNOLOGIES, INC.

RIGOL
DL3000 Performance Verification Manual
I
Guaranty and Declaration
Copyright
© 2017 RIGOL TECHNOLOGIES, INC. All Rights Reserved.
Trademark Information
RIGOL is a registered trademark of RIGOL TECHNOLOGIES, INC.
Publication Number
PVJ01101-1110
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 ISO9001:2008 standard and the ISO14001:2004
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: [e-mail]
Website: www.rigol.com

RIGOL
DL3000 Performance Verification Manual
II
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.

RIGOL
DL3000 Performance Verification Manual
III
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.

RIGOL
DL3000 Performance Verification Manual
IV
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
Voltage
Current
Power
DL3021/DL3021A
1
DC 150 V
40 A
200 W
DL3031/DL3031A
1
DC 150 V
60 A
350 W

Contents RIGOL
DL3000 Performance Verification Manual
V
Contents
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

Chapter 1 Test Overview RIGOL
DL3000 Performance Verification Manual
1-1
Chapter 1 Test Overview
Contents in this chapter:
Test Preparations
Recommended Test Devices
Test Precautions
Test Result Records

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DL3000 Performance Verification Manual
1-2
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
Fuse Rating
115 Vac
± (10% of AC input + 115 Vac),
50 Hz to 60 Hz
T0.315 A/250 V
230 Vac
± (10% of AC input + 230 Vac)
(max: 250 Vac), 50 Hz to 60 Hz
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%.

Chapter 1 Test Overview RIGOL
DL3000 Performance Verification Manual
1-3
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
Recommended
Model
Usage
Digital
Multimeter
Readout Resolution: 6½
RIGOL DM3068
Measures DC
voltage
DC Power Supply
DC 150 V/1 A
DC 8 V/90 A
DSP-150-005HD
DSP-008-090HD
Provides voltage
and current
Current
Sampling
Resistor RM
0.01 Ω (temperature drift: 1
ppm)
RUG-Z-R010-01-TK1
Measures
programming
accuracy and
readback accuracy
USB Cable
--
--
Realizes remote
control, measures
programming
accuracy and
readback accuracy

RIGOL Chapter 1 Test Overview
DL3000 Performance Verification Manual
1-4
Test Precautions
Connection methods for the input terminals (see Figure 1-1):
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.
A
Outer Nut
Shield

Chapter 2 Specifications Test RIGOL
DL3000 Performance Verification Manual
2-1
Chapter 2 Specifications Test
Contents in this chapter:
CC Programming Accuracy and Readback Accuracy
CV Programming Accuracy and Readback Accuracy
CR Programming Accuracy

RIGOL Chapter 2 Specifications Test
DL3000 Performance Verification Manual
2-2
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
DC Power
Supply
AC Power
Supply
+-
-+
+ -
RM
Digital Multimeter/
Digital Oscilloscope/
RMS Voltmeter
+
-
Figure 2-1 CC Test Connection

Chapter 2 Specifications Test RIGOL
DL3000 Performance Verification Manual
2-3
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 RM0.01 Ω), 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

RIGOL Chapter 2 Specifications Test
DL3000 Performance Verification Manual
2-4
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
/*Sets the current range of the electronic
load to 60 A.*/
:SOUR:CURR:LEV:IMM 8
/*Sets the input current of the electronic
load to 8 A.*/
:SOUR:INP:STAT 1
/*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, ILis 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
/*Sets the current range of the
electronic load to 60 A.*/
:SOUR:CURR:LEV:IMM 60
/*Sets the input current of the
electronic load to 60 A.*/
:SOUR:INP:STAT 1
/*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.

Chapter 2 Specifications Test RIGOL
DL3000 Performance Verification Manual
2-5
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, I0is 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
/*Sets the current range of the
electronic load to 6 A.*/
:SOUR:CURR:LEV:IMM 1
/*Sets the input current of the electronic
load to 1 A.*/
:SOUR:INP:STAT 1
/*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, ILis 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
/*Sets the current range of the
electronic load to 6 A.*/
:SOUR:CURR:LEV:IMM 6
/*Sets the input current of the
electronic load to 6 A.*/
:SOUR:INP:STAT 1
/*Enables the channel input.*/

RIGOL Chapter 2 Specifications Test
DL3000 Performance Verification Manual
2-6
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, I0is 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.*/

Chapter 2 Specifications Test RIGOL
DL3000 Performance Verification Manual
2-7
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
± (0.05%+0.02 A)
Readback Accuracy
± (0.05%+0.02 A)
DL3021 Setting
Current
IL[1]
Test Result
U1
I1=U1/RM[2]
I2
Programming Accuracy: |I1 - IL[1]|
Readback Accuracy: |I2- I1|
DL3021 Setting
Current
I0[3]
Test Result
U2
I3=U2/RM[2]
I4
Programming Accuracy: |I3 - I0[3]|
Readback Accuracy: |I4- I3|
The current range is 4 A.
Specification
Programming Accuracy
± (0.05%+0.002 A)
Readback Accuracy
± (0.05%+0.002 A)
DL3021 Setting
Current
IL[1]
Test Result
U1
I1=U1/RM[2]
I2
Programming Accuracy: |I1 - IL[1]|
Readback Accuracy: |I2- I1|
DL3021 Setting
Current
I0[3]
Test Result
U2
I3=U2/RM[2]
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 Ω.
Note[3]: indicates the rated current of the input channel.

RIGOL Chapter 2 Specifications Test
DL3000 Performance Verification Manual
2-8
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
± (0.05%+0.02 A)
Readback Accuracy
± (0.05%+0.02 A)
DL3021A Setting
Current
IL[1]
Test Result
U1
I1=U1/RM[2]
I2
Programming Accuracy: |I1 - IL[1]|
Readback Accuracy: |I2- I1|
DL3021A Setting
Current
I0[3]
Test Result
U2
I3=U2/RM[2]
I4
Programming Accuracy: |I3 - I0[3]|
Readback Accuracy: |I4- I3|
The current range is 4 A.
Specification
Programming Accuracy
± (0.05%+0.002 A)
Readback Accuracy
± (0.05%+0.002 A)
DL3021A Setting
Current
IL[1]
Test Result
U1
I1=U1/RM[2]
I2
Programming Accuracy: |I1 - IL[1]|
Readback Accuracy: |I2- I1|
DL3021A Setting
Current
I0[3]
Test Result
U2
I3=U2/RM[2]
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 Ω.
Note[3]:indicates the rated current of the input channel.