Feasibility study of in‐house second‐channel calibration of dual‐channel electrometers using a battery‐powered current source

We accurately determine the sensitivity coefficient of the second-circuit in a dual-circuit electrometer using the first-circuit of the same or another electrometer as the reference. If the electrometer performance is verified, the coefficient k_elec of the first-circuit is likely applicable to the second-circuit. This method may reduce the costs associated with electrometer calibration in clinical settings.