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The Keithley 6517B 5½-digit Electrometer/High Resistance Meter offers accuracy and sensitivity specifications unmatched by any other meter of this type. Italso offers a variety of features that simplifies measuring high resistances and the resistivity of insulating materials. With reading rates of up to 425 readings/ second, the Model 6517B is also significantly faster than competitive electrometers, so it offers a quick, easy way to measure low-level currents. The half-rack-sized Keithley 6517B has a special low current input amplifier with an input bias current of < 3 fA with just 0.75 fA p-p (peak-to-peak) noise and < 20 µV burden voltage on the lowest range. The input impedance for voltage and resistance measurements is 200 T-ohm for near-ideal circuit loading. These specifications ensure the accuracy and sensitivity needed for accurate low current and high imped ance volt age, resistance, and charge measure ments in areas of research such as physics, optics, nanotechnology, and materials science. A built-in ±1 kV voltage source with sweep capability simplifies performing leak age, break down, and resis tance testing, as well as volume (ohm-cm) and surface resistivity (ohm/square) mea sure ments on insulating materials.
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