Procedure

1) Apply Supply voltage from the signal generator with arbitrary frequency. ( V =3v). Also set the unknown Capacitance value from 'Set Capacitor Value' tab.
2) Then switch on the supply to get millivoltmeter deflection.
3) Choose the values of C₂, C₄, R₃ and R₄ from the capacitance and resistance box. Varry the values to some particular values to achieve "NULL".
4) Observe the millivoltmeter pointer to achieve "NULL".
5) If "NULL" is achieved, switch to 'Measure Capacitor Value' tab and click on 'Simulate'. Observe the calculated values of unknown capacitance (C₁) and it's internal resistance (r₁).
6) Also observe the Dissipation factor of the unknwown capacitor which is defined as

$$ \omega * C * r \ Where, \omega = 2 \pi f $$