CH-14 precision decade capacitance box

  1. CH-14 precision decade capacitance box adopts four-terminal output mode, and realizes wide capacitance range of 1pF~1.111110μF with six-digit decimal changeover switch. Any of the decimal readings within the wide range has the equal high capacitance accuracy and stability (±0.05%). The capacitor box has excellent shielding, and negligible zero-switch capacitance (<0.00005pF), which is superior to the similar products available on market. The reading value of the capacitance is free from the influence of zero-switch capacitance.  It’s not needed to deduct the zero-switch capacitance from the reading value.
  2. This capacitance box is suitable for verification of RLC measuring instruments, fuel measuring instruments, cable coupling capacitance measuring instruments, and, etc. It can be used as standard capacitance measuring instrument in measurement technology institutes, research institutes, factories, university, and etc.

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Calibration conditions


Ambient temperature: (23±2)℃

Relative humidity: (50±10)%


Operation conditions


Ambient temperature: 10℃ to 40℃




1. Capacitance range:     1pF~1.111110μF


2. Minimum step size:     1pF


3. Digits of reading:     Six-digit decimal system


4. Zero-switch capacitance:     <0.00005pF


5. Accuracy:      ±(0.05% +0.00005pF)


6. Temperature coefficient:     ≤ 20ppm/℃   from  1pF~1μF


7. Stability :     <200ppm per year from 1pF~1μF


8. Output mode:     Four-terminal output ( or Three-terminal output )


9. Calibration frequency/operating frequency (f):     1,000Hz


10. Maximum voltage (U):     ≤100V


11. Dimension:     450mm×350mm×140mm

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