OEM Manufacturer Power Supply - ET37 Series Programmable DC Power Supply – Zhongchuang
OEM Manufacturer Power Supply - ET37 Series Programmable DC Power Supply – Zhongchuang Detail:
User-friendly design:
¤ Using 4.3 inch TFT LCD, the resolution is 480*272.
¤ Support waveform display, real-time display of channel output voltage and current curve.
¤ Operating system is simple and convenient, with intuitive interface display system, easy to use.
High performance output:
¤ Independent adjustable output: 1 (ET372X)/2 (ET373X) adjustable output 30V/3A (30V/5A), 1 (2.5V/3.3V/5V)
adjustable fixed output; maximum total output power can reach 305W.
¤ Four output modes: vertical/positive/negative/parallel/series, providing a wider output range. The maximum output
voltage can reach 60V, and the maximum output current can reach 10A.
¤ High precision and high resolution.
¤ Low output ripple and noise.
¤ It has excellent load regulation rate and linear regulation rate.
¤ Support timing output function, maximum set 112 groups.
¤ It has the function of storage and invocation, and can save up to 10 sets of parameter settings.
¤ Standardized USB Device interface, RS232 interface, support SCPI remote command control.
Multiple security protection:
¤ With over-voltage/over-current protection function, it can flexibly set over-voltage and over-current parameters to
achieve effective load protection.
¤ It has two-level over-temperature protection function, realizing double over-temperature protection of software and
hardware.
¤ It has the function of intelligent fan speed control, adjusts the fan speed according to the working conditions, and
effectively reduces the fan noise.
¤ Connecting and Counter-protection with Output Polarity.
¤ It has key lock function to prevent misoperation.
¤ Power voltage: 220V.AC±10%, 110V.AC±10%, 45~65Hz
¤ Display: 4.3” TFT LCD, with a resolution of 480×272, and 16 M colors
¤ Operating temperature: 0°C-40°C
¤ Storage temperature: -10°C-70°C
¤ Relative humidity: ＜80%
¤ Interface: USB DEVICE, RS232 (optional)
¤ Sizes: 230mm x 380mm x 150mm (WxDxH)
¤ Weight: 11kg
¤ Three core power cord: 1
¤ User manual: 1
¤ Output line: 1
¤ USB data line: 1
¤ RS232 data line: 1
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Model |
ET3721 ET3728 |
ET3722 ET3729 |
ET3731 ET3738 |
ET3732 ET3739 |
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Maximum power |
105W( ET3721、3722) 155W(ET3728、3729) |
195W(ET3721、3722) 305W(ET3728、3729) |
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Channel number |
2 (CH1 variable, CH2 fixed) |
3 (CH1, CH2 variable, CH3 fixed) |
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DC output (0°C-40°C) |
Voltage/current (Rated value) |
CH1：0~30V，0~3A(ET3721、3722) CH1：0~30V，0~5A（ET3728、3729） |
CH1、CH2：0~30V，0~3A(ET3721、3722) CH1、CH2：0~30V,0~5A(ET3728、3729) |
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Over-voltage/over-current protection |
CH1：10mV~33V，10mA~3.3A CH1：10mV~33V,10mA~5.5A |
CH1、CH2：10mV~33V，10mA~3.3A CH1、CH2：10mV~33V，10mA~5.5A |
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2.5V/3.3V/5V Fixed output |
Current output 0~3A(ET3721、3722、3731、3732)，Or 0~1A（ET3728、3729、3738、3739）;Output precision: ＜5%;Load regulation: ≤15*minimum scale interval;
Linear regulation: ≤5*minimum scale interval; Ripple and noise (20Hz~7MHz): ≤2mVrms; Overload: 3A(ET3721、3722、3731、3732)，or 0~1A（ET3728、3729、3738、3739）; (Parameters of the fixed position are all listed. The parameters below apply to the variable positions of the voltage.) |
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Linear regulation rate (±output percentage + quantity of minimum scale interval(s)) |
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Voltage |
≤0.01%+2 |
≤0.005%+2 |
≤0.01%+2 |
≤0.005%+2 |
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Current |
≤0.01%+3 |
≤0.005%+3 |
≤0.01%+3 |
≤0.005%+3 |
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Load regulation rate (±output percentage + quantity of minimum scale interval(s)) |
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Voltage |
≤0.01%+2 |
≤0.006%+2 |
≤0.01%+2 |
≤0.006%+2 |
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Current |
≤0.005%+3 |
≤0.01%+3 |
≤0.05%+3 |
≤0.01%+3 |
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Tracking operation (±output percentage + quantity of minimum scale interval(s)) |
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Tracking error |
/ |
≤0.5%+10 of Master（no-load） |
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Parallel regulation rate |
Linear |
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≤0.01%+5 |
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Load |
/ |
≤0.01%+5 |
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Series regulation rate |
Linear |
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≤0.01%+10 |
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Load |
/ |
≤0.02%+10 |
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Ripple and noise (20Hz~-7MHz) |
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Voltage |
≤1mVrms |
≤600μVrms |
≤1mVrms |
≤600μVrms |
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Current |
≤1.5mArms |
≤1mArms |
≤1.5mArms |
≤1mArms |
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Programming/backward reading resolution |
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Voltage |
1mV |
1mV |
1mV |
1mV |
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Current |
1mA |
1mA |
1mA |
1mA |
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Programming/backward reading accuracy (±output percentage + quantity of minimum scale interval(s)) |
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Programming |
Voltage |
0.03%+10 |
0.02%+5 |
0.03%+10 |
0.02%+5 |
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Current |
0.3%+10 |
0.3%+5 |
0.3%+10 |
0.3%+5 |
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Backward reading |
Voltage |
0.03% +10 |
0.03% +5 |
0.03% +10 |
0.03% +5 |
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Current |
0.3% +10 |
0.2% +5 |
0.3% +10 |
0.2% +5 |
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Load transient response time |
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It takes less than 50μs for the output current to change from full load to half load, or from half load to full load and for the output voltage to recover to 15mV. |
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Stability (±output percentage + quantity of minimum scale interval(s)) |
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Voltage |
≤0.02%+10 |
≤0.02%+10 |
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Current |
≤0.1%+1 |
≤0.1%+1 |
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Temperature coefficient (±output percentage + quantity of minimum scale interval(s)) |
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Voltage |
≤0.02%+10 |
≤0.02%+10 |
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Current |
≤0.02%+10 |
≤0.02%+10 |
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Other |
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Command processing time |
＜200ms |
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Cooling method |
Fan cooling |
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Assume full obligation to meet all demands of our customers; accomplish ongoing advancements by promoting the advancement of our customers; become the final permanent cooperative partner of clientele and maximize the interests of shoppers for OEM Manufacturer Power Supply - ET37 Series Programmable DC Power Supply – Zhongchuang , The product will supply to all over the world, such as: kazan, Australia, Malta, We have been perfectly devoted to the design, R&D, manufacture, sale and service of hair products during 10 years of development. We have introduced and are making full use of internationally advanced technology and equipment, with advantages of skilled workers. "Dedicated to providing reliable customer service" is our aim. We are sincerely looking forward to establishing business relationships with friends from at home and abroad.
By Samantha from New Zealand - 2018.11.28 16:25
The company has rich resources, advanced machinery, experienced workers and excellent services, hope you keep improving and perfecting your products and service, wish you better!
By Judy from Jordan - 2018.12.05 13:53
