programmable dc power supply model 62000h series

programmable dc power supply model 62000h series
MODEL 62000H SERIES
KEY FEATURES
■
■
■
■
■
■
■
■
■
■
■
■
■
PROGRAMMABLE DC POWER SUPPLY
MODEL 62000H SERIES
Chroma's new 62000H Series of
programmable DC power supplies offer many
unique advantages for telecom, automated
test system & integration, industrial, battery
charge & simulation for hybrid cars and solar
panel simulation. These advantages include
high power density of 15KW in 3U, precision
readback of output current and voltage,
output trigger signals as well as the ability to
create complex DC transient waveforms to
test device behavior for spikes, drops, and
other voltage deviations.
application and life cycle ON/OFF test. In
addition, the 62000H has a 16 bit digital
control with bright vacuum fluorescent display
readout.
The 62000H Series includes different models
ranging from 5KW to 15KW, with current
range up to 375A and voltage range up
to 1000V. The 62000H can easily parallel
up to ten units capable of 150KW with
current sharing for bulk power applications,
for example, battery bank simulation of
450V/150A/67.5KW for electric vehicle and
military use.
Another unique capability of the 62000H
supplies is their ability to create complex DC
transient waveforms. This capability allows
devices to be tested to DC voltage dropouts,
spikes and other voltage variations making
them an ideal choice for aerospace device
testing, inverter testing and other devices
which will experience voltage interrupts.
Applications include DC/DC Converter &
Inverter voltage drop test, engine startup simulation, battery automated charging,
electronic product life cycle test, etc.
There are 100 user programmable input
status on the front panel for automated test
APG
RS-485
RS-232
■
■
■
■
■
■
■
■
■
■
■
The 62000H series DC power supplies are
very easy to operate either from the front
panel keypad or from the remote controller
via USB / RS232 / RS485 / APG (Standard) and
GPIB & Ethernet (optional). Its compact size
with 3U only can be stacked on a bench in a
standard rack without any difficulty.
Ethernet
GPIB
USB
Compliant
Power range : 5KW / 10KW / 15KW
Current range : 0 ~ 375A
Voltage range : 0 ~ 1000V/2000V(series)
AC input voltage range :
200/220Vac, 380/400Vac , 440/480Vac
High power density (15KW in 3U)
Easy master / slave parallel & series
operation up to 150KW
Precision V&I measurements
High-speed programming
Voltage & current slew rate control
Digital encoder knobs, keypad and
function keys
Current sharing operation
Voltage ramp function
(time range: 10 ms ~ 99 hours)
Auto sequencing programming:
10 programs / 100 sequences
OVP, current limit, thermal protection
Standard analog programming interface
Standard USB / RS232 / RS485 interface
Optional GPIB / Ethernet interface
Remote output ON / OFF (I / P)
Remote sense line drop compensation
LabView and Labwindows
Solar array simulation function
Shade I-V curve simulation
I-V curve programming:
10 program / 100 I-V files
CE Certified
HIGH POWER DENSITY 15KW IN 3U PROGRAMMABLE DC POWER SUPPLY
The 62000H Series supplies offer a high
power density envelop of maximum 15KW
in 3U, deliver low output noise and ripple,
3U
(132.8mm)
excellent line and load regulation, and fast
transient response. With wide range of
voltage (30V~1000V), current (375A~25A)
combinations, suitable for every part of
your manufacturing process from design to
production testing.
MASTER / SLAVE PARALLEL & SERIES OPERATION UP TO 150KW
When high power is required, it is common to connect two or more power supplies in parallel or series. The 62000H Series supplies have a
smart Master / Slave control mode making series/parallel operation fast and simple. In this mode, the master scales values and downloads
data to slave units so programming is simple and current sharing automatic.
Local Front Panel
Master
Remote GPIB/USB/RS232
RS485/Ethernet
SYSTEM
BUS
Slave
SOLAR ARRAY SIMULATION FUNCTION
Model 62150H-600S/1000S provides an unique feature to
simulate the output characteristics of a solar array. This function
is useful for MPPT performance evaluation on PV inverter
device. User can easily edit the I-V curve, testing and monitor
the PV inverter via softpanel , see the right Figure A & B.
* Please see the solar array simulator brochure for more
informations.
Figure A : Dynamic MPPT Test
Solar Panel
PC
Solar Array Simulator
DC Voltage Input
AC Power Output
UUT (PV Inverter)
Figure B : Static MPPT Test
PROGRAMMING SEQUENCES APPLICATIONS
The 62000H Series supplies' LIST and STEP modes allows for auto sequencing function. The LIST mode allows for 100 user programmable
sequences with time settings ranging from 5ms to 15000s and voltage / current slew rate control. The STEP mode allows for setting start,
end voltage and run time of 10ms to 99 hours for automated test applications. Applications include DC/DC Converter & Inverter voltage
dropout testing, engine start-up simulation, battery automated charging, battery voltage dropout simulation, product life cycle testing and
avionics testing.
LIST Mode
STEP Mode
Battery Voltage Dropout
Reset Behavior at Voltage Drop
of ISO 16750-2
Engine Starting Profile
of ISO 16750-2
Battery Voltage Slow
Decrease & Decrease
Telecom Converter Sag Testing
Output Voltage Slew Rate Control
PANEL DESCRIPTION
1
2
3
4
5 6
7 8
9
10
1. POWER Switch
2. VFD Display
Display setting, readings and operating status
3. LOCK Key
Lock all settings
4. OUTPUT Key
Enable or disable the output
5. CONFIG Key
Set the system configuration
6. VOLTAGE Key
Set the output voltage
7. CURRENT Key
Set the output current
8. PROG Key
Program the sequence
9. NUMERIC Key
Set the data
10.ROTARY Key
Adjust the V&I and set the parameter
11
12
13
14
15 16 17 18
19
11. Analog programming interface
For analog level to program and monitor output
voltage & current
12. RS-232 or RS-485 Interface (alternative)
13. System Bus
For master/slave parallel and series control
14. USB Interface
15. OUTPUT Terminal
Connect the output cable to a UUT
16. System Fan
With fan speed control
17. Current Sharing Terminal
Connect the cable to slave unit
18. Sense Terminal
Connect the UUT for voltage compensation
19. GPIB or ETHERNET Interface (optional)
20. AC Input Terminal
ORDERING INFORMATION
Power Rating
2KW
5KW
10KW
15KW
Options
20
62000H Series Programmable DC Power Supply
62020H-150S : Programmable DC Power Supply 150V/40A/2KW with Solar Array Simulation
62050H-40 : Programmable DC Power Supply 40V/125A/5KW
62050H-450 : Programmable DC Power Supply 450V/11.5A/5KW
62050H-600 : Programmable DC Power Supply 600V/8.5A/5KW
62050H-600S : Programmable DC Power Supply 600V/8.5A/5KW with Solar Array Simulation
62075H-30 : Programmable DC Power Supply 30V/250A/7.5KW
62100H-30 : Programmable DC Power Supply 30V/375A/11KW
62100H-40 : Programmable DC Power Supply 40V/250A/10KW
62100H-100P : Programmable DC Power Supply 100V/250A/10KW
62100H-450 : Programmable DC Power Supply 450V/23A/10KW
62100H-600 : Programmable DC Power Supply 600V/17A/10KW
62100H-600S : Programmable DC Power Supply 600V/17A/10kW with Solar Array Simulation
62100H-1000 : Programmable DC Power Supply 1000V/10A/10KW
62150H-40 : Programmable DC Power Supply 40V/375A/15KW
62150H-100P : Programmable DC Power Supply 100V/375A/15KW
62150H-450 : Programmable DC Power Supply 450V/34A/15KW
62150H-600 : Programmable DC Power Supply 600V/25A/15KW
62150H-600S : Programmable DC Power Supply 600V/25A/15KW with Solar Array Simulation
62150H-1000 : Programmable DC Power Supply 1000V/15A/15KW
62150H-1000S : Programmable DC Power Supply 1000V/15A/15kW with Solar Array Simulation
A620024 : GPIB Interface for 62000H series (Factory installed)
A620025 : Ethernet Interface for 62000H series (Factory installed)
A620026 : Rack Mounting kit for 62000H series
Note *1 : All models output power are available for 200/220Vac, 380/400Vac and 440/480Vac (600V/1000V models) line voltage.
Note *2 : Call for availability. (30V/40V/100V/450V for 200/220 Vac and 440/480 Vac line voltage)
SOFT PANEL
Program Sequences Function
ISO 16750-2 Standard for Voltage
Transient Test
GS-95024 Standard for Voltage
Transient Test
Battery Charge Test
ELECTRICAL SPECIFICATIONS -1
Model
62075H-30
62050H-40
62050H-450
62050H-600
62100H-30
62100H-40
62100H-100P
Output Ratings
Output Voltage
0-30V
0-40V
0-450V
0-600V
0-30V
0-40V
0-100V
Output Current
0-250A
0-125A
0-11.5A
0-8.5A
0-375A
0-250A
0-250A
Output Power
7500W
5000W
5000W
5000W
11250W
10000W
10000W
Line Regulation
Voltage
±0.01% F.S.
Current
±0.05% F.S.
Load Regulation
Voltage
±0.02% F.S.
Current
±0.1% F.S.
Voltage Measurement
Range
6V / 30V
8V / 40V
90V / 450V
120V / 600V
6V / 30V
8V / 40V
20V/100V
Accuracy
0.05% + 0.05% F.S.
Current Measurement
Range
50A / 250A
25A / 125A
2.3A / 11.5A
1.7A / 8.5A
75A / 375A
50A / 250A
50A / 250A
Accuracy
0.1% + 0.1% F.S.
Output Noise & Ripple
Voltage Noise (P-P)
60mV
60mV
300mV
350mV
60mV
60mV
150mV
Voltage Ripple (rms)
15mV
15mV
450mV
600mV
15mV
15mV
25mV
Current Ripple (rms)
100mA
50mA
20mA
15mA
150mA
100mA
150mA
OVP Adjustment Range
Range
0-110% programmable from front panel, remote digital inputs
Accuracy
±1% of full-scale output
Programming Response Time
Rise Time: Full Load
6ms
8ms
60ms
60ms
6ms
8ms
20ms
Rise Time: No Load
6ms
8ms
60ms
60ms
6ms
8ms
20ms
Fall Time: Full Load
6ms
8ms
60ms
60ms
6ms
8ms
20ms
Fall Time: 10% Load
100ms
100ms
250ms
250ms
100ms
100ms
625ms
Fall Time: No Load
1s
1s
2.5s
2.5s
1s
1s
2.5s
Slew Rate Control
0.001V/ms ~
0.001V/ms ~
0.001V/ms ~
0.001V/ms ~
0.001V/ms ~
0.001V/ms ~
0.001V/ms ~
Voltage slew rate range
5V/ms
5V/ms
7.5V/ms
10V/ms
5V/ms
5V/ms
5V/ms
Current slew rate range
0.001A~1A/ms, or INF
Min. transition time
0.5ms
Transient Response Time
Recovers within 1ms to +/- 0.75% of steady-state output for a 50% to 100% or 100% to 50% load change(1A/µs)
Efficiency (Typical)
0.87
0.87
0.87
0.87
0.87
0.87
0.92
Drift (30 minutes)
Voltage
0.04% of Vmax
Current
0.06% of Imax
Drift (8 hours)
Voltage
0.02% of Vmax
Current
0.04% of Imax
Temperature Coefficient
Voltage
0.04% of Vmax/˚C
Current
0.06% of Imax/˚C
• Continued on next page ➟
ELECTRICAL SPECIFICATIONS -2
Model
62100H-450 62100H-600
Output Ratings
Output Voltage
0-450V
0-600V
Output Current
0-23A
0-17A
Output Power
10000W
10000W
Line Regulation
Voltage
Current
Load Regulation
Voltage
±0.02% F.S. ±0.02% F.S.
Current
Voltage Measurement
Range
90V/450V
120V/600V
Accuracy
Current Measurement
Range
4.6A/23A
3.2A/17A
Accuracy
Output Noise & Ripple
Voltage Noise(P-P)
300mV
350mV
Voltage Ripple(rms)
450mV
600mV
Current Ripple(rms)
40mA
30mA
OVP Adjustment Range
Range
Accuracy
Programming Response Time
62100H-1000
62150H-40
62150H-100P
0-1000V
0-10A
10000W
0-40V
0-375A
15000W
0-100V
0-375A
15000W
0-600V
0-25A
15000W
0-1000V
0-15A
15000W
±0.05% F.S.
±0.02% F.S. ±0.02% F.S.
±0.1% F.S.
200V/1000V
8V/40V
20V/100V
0.05% + 0.05%F.S.
90V/450V
120V/600V
200V/1000V
4A/10A
75A/375A
75A/375A
0.1% + 0.1%F.S.
6.8A/34A
5A/25A
6A/15A
300mV
450mV
60mA
350mV
600mV
45mA
2550mV
1500mV
270mA
2550mV
1500mV
180mA
60mV
15mV
150mA
150mV
25mV
150mA
±0.02% F.S. ±0.02% F.S.
±0.05% F.S.
0-110% programmable from front panel, remote digital inputs
±1% of full-scale output
60ms
60ms
Rise Time:No Load
60ms
60ms
Fall Time: Full Load
60ms
60ms
Fall Time: 10% Load
250ms
250ms
Fall Time: No Load
Slew Rate Control
2.5s
2.5s
25ms
(30% F.S.
CC Load)
25ms
25ms
(50% F.S.
CC Load)
120ms
(10% F.S.
CC Load)
3s
0.001V/ms
~7.5V/ms
0.001V/ms
~10V/ms
0.001Vms~
40V/ms
Current slew rate range
Min. transition time
Transient Response Time
Efficiency (Typical)
Drift (30 minutes)
Voltage
Current
Drift (8 hours)
Voltage
Current
Temperature Coefficient
Voltage
Current
0-450V
0-34A
15000W
62150H-1000
±0.01% F.S.
±0.05% F.S.
Rise Time:Full Load
Voltage slew rate range
62150H-450 62150H-600
8ms
20ms
60ms
60ms
8ms
20ms
60ms
60ms
8ms
20ms
60ms
60ms
100ms
625ms
250ms
250ms
1s
2.5s
2.5s
2.5s
25ms
(50% F.S.
CC Load)
25ms
25ms
(50% F.S.
CC Load)
80ms
(10% F.S.
CC Load)
3s
0.001V/ms
0.001V/ms
0.001V/ms
0.001V/ms
0.001V/ms
~5V/ms
~5V/ms
~7.5V/ms
~10V/ms
~40V/ms
0.001A~0.1A/ms, or INF
0.5ms
Recovers within 1ms to +/- 0.75% of steady-state output for a 50% to 100% or 100% to 50% load change(1A/µs)
0.87
0.87
0.85
0.87
0.92
0.87
0.87
0.87
0.04% of Vmax
0.06% of Imax
0.02% of Vmax
0.04% of Imax
0.04% of Vmax/˚C
0.06% of Imax/˚C
Note *1 : Please specify GPIB or Ethernet Interface (alternative) at time of order.
Note *2 : All models output power are available for 200/220Vac, 380/400Vac and 440/480Vac (600V/1000V models) line voltage.
Note *3 : Call for availability. (30V/40V/100V/450V for 200/220 Vac and 440/480 Vac line voltage)
GENERAL SPECIFICATIONS
Programming & Measurement Resolution
Voltage (Front Panel )
Current (Front Panel)
Voltage (Digital Interface)
Current (Digital Interface)
Voltage (Analog Interface )
Current (Analog Interface )
Remote Interface
Analog programming
USB
RS-232
RS485
GPIB
Ethernet
System BUS(CAN)
Programming Accuracy
Voltage (Front Panel and Digital Interface )
Current (Front Panel and Digital Interface )
Voltage (Analog Interface)
Current (Analog Interface)
GPIB Command Response Time
Vout setting
Measure V & I
Analog Interface (I/O)
Voltage and Current Programming inputs (I/P)
Voltage and Current monitor output (O/P)
External ON/OFF (I/P)
DC_ON Signal (O/P)
CV or CC mode Indicator (O/P)
OTP Indicator (O/P)
System Fault indicator(O/P)
Auxiliary power supply(O/P)
Safety interlock(I/P)
Remote inhibit(I/P)
Series & Parallel Operation
0.1mV / 1mV / 10mV / 100mV (VO < 10V / 40V / 600V / 1000V)
0.1mA / 1mA / 10 mA (IO < 10A / 100A / 1000A)
0.002% of Vmax
0.002% of Imax
0.04% of Vmax
0.04% of Imax
Standard
Standard
Standard
Standard
Optional
Optional
Standard for master/slave control
0.1% of Vmax
0.3% of Imax
0.2% of Vmax
0.3% of Imax
GPIB send command to DC source receiver <20ms
Under GPIB command using Measure <25ms
0-10Vdc / 0-5Vdc / 0-5k ohm / 4-20 mA of F.S.
0-10Vdc / 0-5Vdc / 4-20mA of F.S.
TTL:Active Low or High(Selective)
Level by user define. ( Time delay = 1 ms at voltage slew rate of 10V/ms.)
TTL Level High=CV mode ; TTL Level Low= CC mode
TTL: Active Low
TTL: Active Low
Nominal supply voltage : 12Vdc / Maximum current sink capability: 10mA
Time accuracy: <100ms
TTL: Active Low
Master / Slave control via CAN for 10 units up to 150KW. (Series: two units / Parallel: ten
units )
Auto Sequencing(List Mode)
Number of program
Number of sequence
Dwell time Range
Trig. Source
Auto Sequencing (Step Mode)
Start voltage
End voltage
Run time
Input Specification
10
100
5ms - 15000S
Manual / Auto / External
0 to Full scale
0 to Full scale
10ms - 99hours
AC input voltage 3phase , 3 wire + ground
AC frequency range
Max Current
(each phase)
200/220 Vac
380/400 Vac
440/480 Vac
5KW Model : 39A
5KW Model : 22A
5KW Model : 19A
3Ø 200~220Vac ± 10% VLL
3Ø 380~400Vac ± 10% VLL
3Ø 440~480Vac ± 10% VLL
47-63 Hz
10KW Model : 69A
10KW Model : 37A/20A *4
10KW Model : 32A
15KW Model : 93A
15KW Model : 50A/30A *5
15KW Model : 44A
General Specification
Maximum Remote Sense Line Drop
Compensation
Operating Temperature Range
Storage Temperature Range
Dimension (HxWxD)
Weight
30V/40V model : 5% of full scale voltage per line(10% total)
100V model : 2.5% of full scale voltage per line (5% total)
>100V model : 2% of full scale voltage per line (4% total)
0˚C ~ 50˚C *1
-40˚C ~ +85˚C
132.8 x 428 x 610 mm / 5.23 x 16.85 x 24.02 inch
5KW Model : Approx. 23 kg / 50.66 lbs
10KW Model : Approx. 29 kg / 63.88 lbs *2 *3
15KW Model : Approx. 35 kg / 77.09 lbs *3
Note*1 : The operating temperature range is 0˚C ~ 40˚C for Model 62100H-1000/62150H-1000.
Note*2 : The weight is approx. 35kg/77.09 lbs for Model 62100H-1000.
Note*3 : The weight is approx. 40kg/88.18 lbs for Model 62100H-100P/62150H-100P.
Note*4 : The max. input current (each phase) is 20A for Model 62100H-100P.
Note*5 : The max. input current (each phase) is 30A for Model 62150H-100P.
ELECTRICAL SPECIFICATIONS WITH SOLAR ARRAY SIMULATION
MODEL
62020H-150S
62050H-600S
62100H-600S
62150H-600S
62150H-1000S
Output Ratings
Output Voltage
0-150V
0-600V
0-600V
0-600V
0-1000V
Output Current
0-40A
0-8.5A
0-17A
0-25A
0-15A
Output Power
2000W
5000W
10000W
15000W
15000W
Line Regulation
Voltage
+/- 0.01% F.S.
Current
+/- 0.05% F.S.
Load Regulation
Voltage
+/- 0.05% F.S.
Current
+/- 0.1% F.S.
Voltage Measurement
Range
60V / 150V
120V / 600V
120V / 600V
120V / 600V
200V / 1000V
Accuracy
0.05% + 0.05%F.S.
Current Measurement
Range
16A / 40A
3.4A / 8.5A
6.8A / 17A
10A / 25A
6A / 15A
Accuracy
0.1% + 0.1%F.S.
Output Noise&Ripple
Voltage Noise(P-P)
450 mV
1500 mV
1500 mV
1500 mV
2550 mV
Voltage Ripple(rms)
65 mV
650 mV
650 mV
650 mV
1950 mV
Current Ripple(rms)
80 mA
150 mA
300 mA
450 mA
270mA
OVP Adjustment Range
Range
0-110% programmable from front panel, remote digital inputs.
Accuracy
+/- 1% of full-scale output
Programming Response Time
Rise Time: 50%F.S. CC Load 10ms (6.66A loading)
30ms
30ms
30ms
25ms
Rise Time: No Load
10ms
30ms
30ms
30ms
25ms
Fall Time: 50%F.S. CC Load 10ms (6.66A loading)
30ms
30ms
30ms
25ms
Fall Time: 10%F.S. CC Load 83ms (1.33A loading)
100ms
100ms
100ms
80ms
Fall Time: No Load
300ms
1.2s
1.2s
1.2s
3s
Slew Rate Control
Voltage Slew Rate Range
0.001V/ms - 15V/ms
0.001V/ms - 20V/ms
0.001V/ms - 20V/ms
0.001V/ms - 20V/ms
0.001V/ms - 40V/ms
0.001A/ms - 1A/ms, 0.001A/ms - 0.1A/ms, 0.001A/ms - 0.1A/ms, 0.001A/ms - 0.1A/ms, 0.001A/ms - 0.1A/ms,
Current Slew Rate Range
or INF
or INF
or INF
or INF
or INF
Minimum Transition Time
0.5ms
Transient response time
Recovers within 1ms to +/- 0.75% of steady-state output for a 50% to 100% or 100% to 50% load change(1A/us)
Efficiency
0.77 (Typical)
0.87 (Typical)
Programming & Measurement Resolution
Voltage (Front Panel)
10 mV
10 mV
10 mV
10 mV
100mV
Current (Front Panel)
1mA
1mA
1mA
1mA
1mA
Voltage (Digital Interface)
0.002% of Vmax
Current (Digital Interface)
0.002% of Imax
Voltage (Analog Interface)
0.04% of Vmax
Current (Analog Interface)
0.04% of Imax
Programming Accuracy
Voltage (Front Panel and
0.1% of Vmax
Digital Interface)
Current (Front Panel and
0.3% of Imax
Digital Interface)
Voltage (Analog Interface)
0.2% of Vmax
Current (Analog Interface)
0.3% of Imax
Parallel Operation*1
Master / Slave control via CAN for 10 units up to 150KW. (Parallel: ten units )
Auto Sequencing (I-V program)
Number of program
10
Number of sequence
100
Dwell time Range
1s - 15,000S
Trig. Source
Manual / Auto
All specifications are subject to change without notice. Please visit our website for the most up to date specifications.
Note*1 : Max. Power is 20kW for 62020H-150S.
Note*2 : There is parallel mode for DC power supply when the I-V curve function is enabled.
HEADQUARTERS
CHROMA ATE INC.
66 Huaya 1st Road,
Guishan, Taoyuan
33383, Taiwan
T +886-3-327-9999
F +886-3-327-8898
www.chromaate.com
[email protected]
U.S.A.
CHROMA SYSTEMS
SOLUTIONS, INC.
19772 Pauling,
Foothill Ranch,
CA 92610
T +1-949-600-6400
F +1-949-600-6401
www.chromausa.com
[email protected]
EUROPE
CHROMA ATE
EUROPE B.V.
Morsestraat 32,
6716 AH Ede,
The Netherlands
T +31-318-648282
F +31-318-648288
www.chromaeu.com
[email protected]
JAPAN
CHROMA JAPAN CORP.
888 Nippa-cho, Kouhoku-ku,
Yokohama-shi, Kanagawa,
223-0057 Japan
T +81-45-542-1118
F +81-45-542-1080
www.chroma.co.jp
[email protected]
CHROMA ATE GERMANY
Südtiroler Str. 9, 86165, Augsburg, Germany
T +49-821-790967-0
F +49-821-790967-600
[email protected]
CHINA
CHROMA ELECTRONICS
(SHENZHEN) CO., LTD.
8F, No.4, Nanyou Tian An
Industrial Estate, Shenzhen,
China PC: 518052
T +86-755-2664-4598
F +86-755-2641-9620
www.chroma.com.cn
[email protected]
SOUTHEAST ASIA
QUANTEL PTE LTD.
(A company of Chroma Group)
46 Lorong 17 Geylang # 05-02
Enterprise Industrial Building,
Singapore 388568
T +65-6745-3200
F +65-6745-9764
www.quantel-global.com
[email protected]
62000H Series-E-201705-2000
Was this manual useful for you? yes no
Thank you for your participation!

* Your assessment is very important for improving the work of artificial intelligence, which forms the content of this project

Download PDF

advertisement