| Model | 6705 | 6710 | 6720 | 6730 | 6740 | 
| INPUT | 
| Phase | 1 Phase  | 
| Voltage | 115/230Vac ± 15% | 230Vac ± 15% | 
| Frequency | 47-63Hz | 
| OUTPUT | 
| Power rating | 500VA | 1000VA | 2000VA | 3000VA | 4000VA | 
| Max. Current(r.m.s) | 0-150V | 4.2A | 8.4A | 16.8A | 25.2A | 33.6A | 
| 0-300V  | 2.1A | 4.2A | 8.4A | 12.6A | 16.8A | 
| Max. Current(peak) | 0-150V | 16.8A | 33.6A | 67.2A | 100.8A | 134.4A | 
| 0-300V | 8.4A | 12.6A | 33.6A | 50.4A | 67.2A | 
| Phase | 1Phase / 2W | 
| THD(Total Harmonic Distortation) | <=0.5% at 45-500Hz (Resistive Load) | 
| Crest Factor | >= 4  | 
| Line Regulation | 0.1% max for a ± 10% line change. | 
| Load Regulation | <=0.5% (Resistive Load) | 
| Response Time | < 100μS | 
| SETTING | 
| Voltage | Range | 0-300V, 150/300V Auto | 
| Resolution | 0.1V | 
| Accuracy | ±(0.5%+2 counts) | 
| Frequency | Range | 45-500Hz | 
| Resolution | 0.1Hz at 45-99.9Hz , 1Hz at 100-500Hz | 
| Accuracy | ±0.02% of setting | 
| Starting& EndingPhase Angle
 | Range | 0-360° | 
| Resolution | 1° | 
| Accuracy | ±1°(45 - 65HZ) | 
| MEASUREMENT | 
| Frequency | Range | 0.0-500.0Hz | 
| Resolution | 0.1Hz | 
| Accuracy | ±0.1Hz | 
| Voltage | Range | 0.0-300.0V | 
| Resolution | 0.1V | 
| Accuracy | ± (0.5% of reading +2 counts) | 
| Current(r.m.s) | Range | L | 0.000-3.500A | 
| H | 3.00-35.00A | 
| Resolution | L | 0.001A | 
| H | 0.01A | 
| Accuracy | L | ± (0.5% of reading +5 counts) | 
| H | ± (0.5% of reading +3 counts) | 
| Current(peak) | Range | 0.0 -200.0A | 
| Resolution | 0.1A | 
| Accuracy | ± (1% of reading +1 count) | 
| Power | Range | L | 0.0-350.0W | 
| H | 300-4000W | 
| Resolution | L | 0.1W | 
| H | 1W | 
| Accuracy | L | ± (0.6% of reading +5 counts) | 
| H | ± (0.6% of reading +2 counts) | 
| Power Factor | Range | 0 - 1.000 | 
| Resolution | W / VA ,Calculated and displayed to three significant digits | 
| Accuracy | 
| GENERAL | 
| LowRange Meter (for 6705/ 6710 Option) | Range : 2.0mA - 350.0mA / 0.20 - 35.00WResolution : 0.1mA / 0.01W
 Accuracy : ± (0.6% of reading +5 counts).
 | 
| Remote Input Signal | Test, Reset, Recall program memory 1 through 7  | 
| Remote Output Signal | Pass, Fail , Test-in Process | 
| Memory | 50 memories, 9 steps/memory | 
| Sync Output Signal | Output Signal 10V ,BNC type | 
| Timer | 0=Continuous, 0.1-999.9 (Unit: sec, minute, hour selectable) | 
| Alarm Volume Setting | Range: 0-9 ;0=OFF, 1 is softest volume, 9 is loudest volume. | 
| Graphic Display | 240 x 64 dot resolution Monographic LCD /Contrast 9 Levels 1-9 | 
| Auto loop cycle | By step or memory, or system loop cycle setting. 0=Continuous, OFF, 2~9999 | 
| Over Current Fold Back  | On/Off , Setting On when output current over setting A-Hi value it will fold back output voltage to keep constant output current is setting A-Hi value. | 
| Protection | OCP, OTP ,OVP and Alarm | 
| Interface  | GPIB / RS232 option | 
| Dimension(WxHxD) mm | 430 x 89 x 400, 2U | 430 x 89 x 560, 2U | 430 x 267 x 650, 6U | 430 x 667 x 650, 15U | 430 x 667 x 650, 15U | 
| Net Weight | 25Kg | 36Kg | 90Kg | - | - | 
| Operation Environment | 0-40°C/20-80%RH |