| Model | VC4090A | VC4090B | VC4090C | VC4091A | VC4091B | VC4091C |
| Testing frequency | 10Points(100,120, 200,400,800, 1K,2K,4K,8K,10K) | 12Points(100,120, 200,400,800,1K, 2K,4K,8K, 10K,15K,20K) | 16Points(100,120, 200,400,800,1K,2K, 4K,8K,10K,15K, 20K,40K,50K, 80K,100K) | 10~10KHz Continuously adjustable, a step of 1 Hz | 10~20KHz Continuously adjustable, a step of 1 Hz | 10~100KHz Continuously adjustable, a step of 1 Hz |
| Display screen | 3.5” TFT LCD screen |
| Number of display digits | Principal parameter: 5 digit Secondary parameter: 5 digit |
| Measured parameter: | Principal parameter: L/C/R/Z Secondary parameter: X/D/Q/θ/ESR |
| Measurement range | L:0.001µH～99999H, C:0.001pF～99.999mF, R:0.0001Ω～99.999MΩ |
| Basic accuracy | 0.2% |
| Measuring display speed | 2 time/s (slow), 4 times/s (medium), 8 time/s (fast) |
| Internal bias | 0-1500mV adjustable, at a step of 1mV. |
| Testing level | Six fixed level(0.1V,0.3V,0.6V,1V,1.5V,2V) | 0.1~2V adjustable, at a step of 1mV. |
| Signal source output impedance | 30Ω,100Ω |
| Calibration function | Open circuit calibration, short circuit calibration |
| Screening function | The limit range of screening can be set to -50%～＋50%, and the fixed points are 1%, 5%, 10% and 20%. |
| Comparator | 5 groups sorting,3 groups of qualified setting, one group of unqualified setting, one group of auxiliary setting |
| Interfaces | standard: RS232(or 485), USB Device, Handler ;optional :GPIB,USB Host |
| Others | Support dc resistance (DCR), electrolytic capacitor measurement model,Adjustment of backlight brightness, Chinese and English are optional |
