PCB Testing Equipments
FPC 4-wire Low Impedance Tester

The FPC four-wire high breakover voltage testing machine 9331 is the ideal solution for breakover impedance of few points and high voltage insulation. This is especially the case with flexible circuit board FPCs vulnerable to expanding, contracting, and bending. FPCs tend to suffer defects of varying copper wire widths, notches, and burrs due to different materials and etching time, and chemical solutions when going through the process. Aiming at short-circuit or open circuit, precision resistance of copper wires and capacitance impedance between wires, the 9331 goes live for testing by just connecting to a manual/pneumatic compact press thimble jig. It not only enables board makers to run 4-wire precision measurement with speed and accuracy, but also cuts PCB O/S test machine investment with less workshop space demand.

  • Multi-channel auto test for up to 8 coils at a time
  • Optional LCR function (frequency 200KHz)
  • High voltage non-destructive pulse pressure measurement technology
  • The best WPC/NFC coil quality test station
  • AC 3000V, DC 3000V, IR 1000V
  • Detect micro-short circuit in between loops within coils by high voltage test
  • Analyze PCB coil insulation, inductance, and parallel connection capacitance change by waveform matching
  • Optional coil impedance characteristic test item (L for inductance and DCR for DC resistance)


Model 9331
Test Pin 128/256 
Conductance Test
Test Frequency 1KHz
AC Test level 1V
Resistance Test 0.1Ω  ~ 1 0MΩ  
Capacitor Test 10pF~1000µF 
Inductor Test -
Diode Test  0 - 7V
Open/Short Test  1KΩ ~ 50KΩ
Insulation Test voltage DCHV  0~ 1500V
Insulation Test  0.1MΩ~1.2GΩ
Leakage Test voltage ACHV  0 ~ 1000V 
Leakage Current Test IL  0.1mA ~5mA
Conductance Test Time  100 Points/Sec Approx. 
O/S Test Time  1,000 Points/Sec
Input 1. Auto Learn
2. File Download 
Display   option
Power Supply  AC110/ 220V 500W
Working Temperature   10°C~40°C
Working Humidity   Less than 50% Relative
Air Supply  5~8Kg/cm²
Test Area W*D  300 x 200 mm
Cylinder Distance   250mm
Cylinder Diameter   Ø 12mm
Size L*W*H  750 x 750x 700 mm
Weight   120 Kg
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