Keithley 602 Features:
Voltage Range: 1 mV to 10 V
Current Range: 10E-14 to 0.3 A
Input Impedance: >10E14-ohms shunted by 20pF
Coulomb Range: 10E-13C full scale to 10E-06C
The Keithley 602 is a battery-operated, solid-state unit that measures voltage, current, resistance, and charge.
The mercury battery modification published by Keithley will not keep your 602 (portable electrometer) in tolerance for resistance readings.
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