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| Calibration Source of Static Charge Measuring Instrument Development |
| JIAO Hai-ni,WANG Yi-zhou,LI Jing-jing,SUN Wen,ZHANG Jun-qi |
| Beijing Oriental Institute of Measurement & Test, Beijing 100086, China |
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Abstract Static charge standard source use precision programmable voltage source and precision capacitor to produce high-precision static charge output, use negative feedback voltage automatically adjust to overcome the load capacitance and output voltage impact on the output charge amount to achieve the steady-constant output static charge, which is easy to verify the electrometers and charge amplifiers. The steady-state of this quasi-standard charge source has increased by 5 orders of magnitude over the traditional charge source. The static charge range of the standard source is 200pC～2μC, permissible error is 0.1%Qx+0.1pC, and equivalent source capacitor is 10-15F.
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