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6517a Electrometer/High Resistance Meter Simplifies measuring high resistances and the resistivity of insulating materials Keithley's 51 /2-digit Model 6517A Electrometer/High Resistance Meter offers accuracy and sensitivity speci- fications unmatched by any other meter of this type. It also offers a variety of features that simplify measuring high resistances and the resistivity of insulating materi- als. With reading rates of up to 125 readings/second, the Model 6517A is also significantly faster than competitive electrometers, so it offers a quick, easy way to measure low-level currents. Exceptional Performance Specifications The half-rack-sized Model 6517A has a special low current input amplifier with an input bias current of <3fA with just 0.75fA p-p (peak-to-peak) noise and <20