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Keithley 617 programmable electrometer multimeter


Digital DPS-295 Component TBC/Transcoder
The Model 617 Programmable Electrometer is our latest and most advanced electrometer. It is a sensitive, versatile, 4 1/2-digit, 7-function instrument which includes a bipolar 100V voltage source, a decade current source, IEEE-488 interface, and outstanding low current accuracy specifications. The 617 can measure resistances or generate I-V curves using either of two measurement techniques. Using the 1nA to 100µA decade current source, a known constant current is forced through the unknown resistance. The developed voltage is measured with a high input impedance voltmeter, and the resistance or voltage is displayed and transmitted over the IEEE bus. Alternatively, the 617's programmable voltage source is applied across the unknown and the resulting current is detected by the 617's sensitive current circuitry.
The 617's built-in IEEE-488 interface makes all controls programmable. You get full autoranging over the full span of ranges on voltage, current, charge, or resistance functions. And you can choose your format for the front panel readout: either exponential or engineering units. The JFET input gives you lower voltage noise and more immunity to overload, without sacrificing current sensitivity. Pushbutton suppression lets you make relative measurements with respect to a selected baseline, or cancel background signals. Zero Correct cancels internal offsets with the touch of a button. Both are bus controllable. The built-in V-O Guard switch lets you drive the inner shield of the triaxial input cable at guard voltage, minimizing leakage current and time constants.
This system has the following features:
* Display: 4½-digit numeric LEDs with appropriate decimal point and polarity indication; signed two-digit alphanumeric exponent
* Overrange Indication: Display reads "OL"
* Ranging: Automatic or manual
* Data Store and Min/Max: 100-reading store capacity
* Programs: Provide front panel access to IEEE address, choice of engineering units or scientific notation, and digital calibration
* Maximum Input: 250V peak, DC to 60Hz sine wave
* Input Connector: Two lug triaxial on rear panel
* Output Connectors: 5-way binding posts on rear panel for V source, preamp, and analog outputs. Rear panel BNC for External Trigger and Meter Complete
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* address: 2 Greenville Street; Newnan, GA 30263