ET3731 high precision programmable three-channel linear adjustable DC regulated power supply 195W30V3A | Обустройство дома

ET3731 high precision programmable three-channel linear adjustable DC regulated power supply 195W30V3A | Обустройство дома

ET37 linear DC power supply is widely used in R&D testing and design verification due to its high output voltage stability and low noise. ET37 series programmable linear DC power supply is equipped with 4.3 -inch TFT color screen. The display interface is simple and concise, rich in content, simple and convenient to operate. It has stable output, low noise, high precision and high resolution. 4 output modes, large output range .

 main features

     User-friendly design:

Adopt 4.3 inch TFT LCD screen; resolution 480*272

Support waveform display, display channel output voltage and current curve in real time;

The operating system is simple and convenient, with an intuitive interface display system, easy to get started;

 High performance output:

 Three independent adjustable outputs: 1 or 2 adjustable output 30V/3A (30V/5A) , 1 channel 2.5V/3.3V/5V adjustable position fixed output; maximum output total 305W ;

 Four output modes: vertical / positive / negative / parallel / series, providing a larger output range, the maximum output voltage can reach 60V , the maximum output current can reach 10A ;

 High precision, high resolution;

 Low output ripple and noise;

 Excellent load regulation and linear regulation;

 Supports timing output function, up to 112 groups can be set ;

 With storage and recall functions, up to 10 sets of parameter settings can be saved ;

 Equipped with USB Device interface, optional RS232 interface to support SCPI remote command control;

 Multiple security protection:

 With overvoltage / overcurrent protection function, it can flexibly set overvoltage and overcurrent parameters to effectively protect the load;

 It has two-level over-temperature protection function to realize double over-temperature protection of software and hardware;

 The utility model has the function of controlling the speed of the intelligent fan, and adjusts the fan speed according to the working condition during work, thereby effectively reducing the fan noise during operation;

 With output polarity reverse protection

 It has a key lock function to prevent misoperation .

Main Specifications:

model

ET3720

ET3721

ET3728

ET3722

ET3729

ET3730

ET3731

ET3738

ET3732

ET3739

Maximum power

105W (ET3720 , 3721 , 3722 three )

Or 155W ( ET3728 , 3729 )

195W (ET3720 , 3721 , 3722 three )

Or 305W ( ET3728 , 3729 )

Number of channels

2

( CH1 is variable, CH2 is fixed)

3

( CH1 , CH2 are variable, CH3 is fixed)

 DC output

( 0 °C -40°C)

Voltage /current

(rated value)

CHl : 0 ~ 30V , 0 ~. 3A (ET3720 , 3721 , 3722 three )

Or CH1 : 0~30V , 0~ 5 A ( ET3728 , 3729 )

CHl , the CH2 : 0 ~ 30V , 0 ~. 3A (ET3720 , 3721 ,3722 three )

Or CHl , the CH2 : 0 ~ 30V , 0 ~ . 5 A (ET3728 , 3729two )

Overpressure /overcurrent protection

(maximum range)

CHl : 10mV ~ 33V , 10mA ~ 3.3A (ET3720 , 3721 , 3722three )

Or CH1 : 10mV~33V , 10mA~ 5 . 5 A ( ET3728 , 3729 )

CHl , the CH2 : 10mV ~ 33V , 10mA ~ 3.3A (ET3720 ,3721 , 3722 three )

Or CHl , the CH2 : 10mV ~ 33V , 10mA ~ . 5 . . 5 A ( ET3728 , 3729 two)

2.5V/3.3V/5V

Fixed output

l  Current output: 0 ~. 3A (ET3720 , 3721 , 3722 , 3730 is , 3731/3732 six ) ,

              Or 0~ 1 A ( ET3728 , 3729 , 3738 , 3739 four) ;

l  Output accuracy: < 5% ;

l  Load adjustment: ≤ 15 words;

l  Linear adjustment: ≤ 5 words;

l  Ripple and noise ( 20Hz~7MHz ): ≤ 2mVrms ;

l  overload situation: 3A (ET3720 , 3721 , 3722 , 3730 , 3731/3732 six ) ,

               Or 0~ 1 A ( ET3728 , 3729 , 3738 , 3739 four).

(The parameters of the fixed file are listed in this table . The following parameters are applicable to the voltage variable)

Linear adjustment rate ( ± output percentage + word count )

Voltage

≤ 0.01 % +2

≤ 0.01 % +2

≤ 0.005 % +2

≤ 0.01 % +2

≤ 0.01 % +2

≤ 0.005 % +2

Current

≤ 0.1 % +3

≤ 0.01 % +3

≤ 0.005 % +3

≤ 0.1 % +3

≤ 0.01 % +3

≤ 0.005 % +3

Load adjustment rate ( ±output percentage + word count )

Voltage

≤ 0.01 % +2

≤ 0.01 % +2

≤ 0.00 6 % +2

≤ 0.01 % +2

≤ 0.01 % +2

≤ 0.006 % +2

Current

≤ 0.1 % +3

≤ 0.05 % +3

≤ 0.01 % +3

≤ 0.1 % +3

≤ 0.05 % +3

≤ 0.01 % +3

Tracking operation ( ±output percentage + word count )

Tracking error

/

≤ 0.5 % +10 of Master (no load)

Parallel adjustment rate

Linear

/

≤ 0.01 % +5

load

/

≤ 0.01 % +5

Series adjustment rate

Linear

/

≤ 0.01 % +10

load

/

≤ 0.02 % +10

Ripple and noise ( 20Hz-7MHz )

Voltage

≤ 1.5mVrms

≤ 1mVrms

≤ 60 0 μ Vrms

≤ 1.5mVrms

≤ 1mVrms

≤ 60 0 μ Vrms

Current

≤ 2mArms

≤ 1.5mArms

≤ 1mArms

≤ 2mArms

≤ 1.5mArms

≤ 1mArms

Programming / readback resolution

Voltage

10mV

1mV

1mV

10mV

1mV

1mV

Current

1mA

1mA

1mA

1mA

1mA

1mA

Programming / readback accuracy (± output percentage + word count)

program

Voltage

0.4 % +2

0.03 % +10

0.02 % +5

0.4 % +2

0.03 % +10

0.02 % +5

Current

0.4 % + 10

0.3 % +10

0.3 % +5

0.4 % + 10

0.3 % +10

0.3 % +5

Read back

Voltage

0.4 %  +2

0.03 %  +10

0.03 %  +5

0.4 %  +2

0.03 %  +10

0.03 %  +5

Current

0.4 %  + 10

0.3 %  +10

0.2 %  +5

0.4 %  + 10

0.3 %  +10

0.2 %  +5

Load transient response time

Output current recovery from full load to half load or full load to the half load, the output voltage 15mV time within less than 50 [mu] S .

Stability (± output percentage + word count)

Voltage

0.02%+10

0.02%+10

Current

0.1% +1

0.1% +1

Temperature coefficient (± output percentage + word count)

Voltage

0.02%+10

0.02%+10

Current

0.02%+10

0.02%+10

other

Command processing time

< 200ms

cooling method

Fan cooling

General technical specifications :

      Power supply voltage: 100Vac+10% , 115Vac+10% , 230Vac+10% (maximum 250VAC ) ,  50-60Hz

      Display: 4.3 inch TFT LCD screen, resolution 480x272 , color 16M color

      Operating temperature: 0  176; to 40  176;

     Storage temperature: -10  176; to 70  176;

      Relative humidity: < 80%

      Interface: USB DEVICE

     Dimensions: 230mm x 380mm x 150mm (width x depth x height)

     Weight: 11kg

 Standard accessories :

       Three-wire power cord  1 

    User Manual 1 

 Optional accessories:

  Output line  

 USB data line

RS232 data line

CD