Note: For now, we only accept orders within Philippines.


  • Gives quick check of insulation tester calibration
  • Contains high quality resistors
  • Calibration certificate provided
  • High accuracy ratio measurements with direct reading of measured ratio
  • Works with any standard capacitor or resistor value without any recalculations
  • All standard UST and GST configurations

  • The CB101 is a calibration box suitable for checking the accuracy of insulation testers. Four resistors are connected in the unit to enable a wide range of values to be checked. The high quality resistors, rated to high voltage, can be used to check resistance readings with test voltages up to 5 kV d.c. A calibration certificate is provided with each CB101 showing the actual value of each resistance checkpoint.


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