ET37 Series Programmable Power Supply
| Model | ET3720 | ET3721 | ET3722 | ET3730 | ET3731 | ET3732 | |||||||||||||
| Maximum power | 105W | 195W | |||||||||||||||||
| 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 |
CH1: 0~30V, 0~3A CH2: 0~30V, 0~3A |
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Over-voltage/over-current protection (maximum settable range) |
CH1: 10mV~33V 10mA~3.3A |
CH1: 1mV~33V 1mA~3.3A |
CH1: 1mV~33V 1mA~3.3A |
CH1, CH2: 10mV~33V 10mA~3.3A |
CH1, CH2: 1mV~33V 1mA~3.3A |
CH1, CH2: 1mV~33V 1mA~3.3A |
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2.5V/3.3V/5V Fixed output |
Current output 0~3A Output precision: ＜5% Load regulation: ≤15*minimum scale interval Linear regulation: ≤5*minimum scale interval Ripple and noise (20Hz~7MHz): ≤2mVrms Overload: 3A (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)) | |||||||||||||||||||
| 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 regulation rate (±output percentage + quantity of minimum scale interval(s)) | |||||||||||||||||||
| Voltage | ≤0.01%+2 | ≤0.01%+2 | ≤0.008%+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 + quantity of minimum scale interval(s)) | |||||||||||||||||||
| Tracking error | ≤0.5%+10 of Master (no-load) | ||||||||||||||||||
| Parallel regulation rate | Linear | ≤0.01%+5 | |||||||||||||||||
| Load | ≤0.01%+5 | ||||||||||||||||||
| Series regulation rate | Linear | ≤0.01%+10 | |||||||||||||||||
| Load | ≤0.02%+10 | ||||||||||||||||||
| Ripple and noise (20Hz~-7MHz) | |||||||||||||||||||
| Voltage | ≤1.5mVrms | ≤1mVrms | ≤550uVrms | ≤1.5mVrms | ≤1mVrms | ≤550uVrms | |||||||||||||
| Current | ≤2mArms | ≤1.5mArms | ≤1mArms | ≤2mArms | ≤1.5mArms | ≤1mArms | |||||||||||||
| Programming/backward reading resolution | |||||||||||||||||||
| Voltage | 10mV | 1mV | 1mV | 10mV | 1mV | 1mV | |||||||||||||
| Current | 10mA | 1mA | 1mA | 10mA | 1mA | 1mA | |||||||||||||
| Programming/backward reading accuracy (±output percentage + quantity of minimum scale interval(s)) | |||||||||||||||||||
| Programming | Voltage | ≤0.4%+2 | ≤0.03%+10 | ≤0.02%+5 | ≤0.4%+2 | ≤0.03%+10 | ≤0.02%+5 | ||||||||||||
| Current | ≤0.4%+2 | ≤0.3%+10 | ≤0.3%+5 | ≤0.4%+2 | ≤0.3%+10 | ≤0.3%+5 | |||||||||||||
| Backward reading | Voltage | ≤0.4% +2 | ≤0.03% +10 | ≤0.03% +5 | ≤0.4% +2 | ≤0.03% +10 | ≤0.03% +5 | ||||||||||||
| Current | ≤0.4% +2 | ≤0.3% +10 | ≤0.2% +5 | ≤0.4% +2 | ≤0.3% +10 | ≤0.2% +5 | |||||||||||||
| Load transient response time | |||||||||||||||||||
| It takes less than 50 μs 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. | |||||||||||||||||||
| Stability (±output percentage + quantity of minimum scale interval(s)) | |||||||||||||||||||
| Voltage | ≤0.02%+10 | ≤0.02%+10 | |||||||||||||||||
| Current | ≤0.1%+1 | ≤0.1%+1 | |||||||||||||||||
| Temperature coefficient (±output percentage + quantity of minimum scale interval(s)) | |||||||||||||||||||
| Voltage | ≤0.02%+10 | ≤0.02%+10 | |||||||||||||||||
| Current | ≤0.02%+10 | ≤0.02%+10 | |||||||||||||||||
| Other | |||||||||||||||||||
| Command processing time | ＜200ms | ||||||||||||||||||
| Cooling method | Fan cooling | ||||||||||||||||||