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General description of the
used KEITHLEY 197
for sale.
The Keithley 197 combines 5 1/2 -digit resolution (on a 220,000-count display) with 1 uV, 1 nA, 1 m-ohm sensitivity. Basic dcV accuracy is 0.011 %. The 197 also has extended performance features. Measure voltage over 9 decades from 1 uV to 1000V. Input resistance on the two lowest voltage ranges exceeds 1 G-ohm. TRMS ac measurements can be made to 100kHz. Make 2- or 4-terminal ohms measurements over 11 decades from 1 m-ohm to 220 M-ohm. Six current ranges measure from 1 nA to 10 A. The microprocessor-based 197 is loaded with smart features . Display annunciators indicate the measurement mode and units. Autoranging on V, ohms, and dB automatically displays maximum resolution. Audio and communication circuit analysis is easy with direct-reading dB measurements referenced to 600 ohm. Resolution is 0.01 dB above 1 mV. Pushbutton relative reference (REL) nulls out or zeros on-range readings. The DATA LOGGER stores up to 100 readings at 6 automatic rates from 3 per second to 1 per hour, or manually at the touch of a button. Specifications. DC Volts (range \ resolution): 200 mV \ 1 uV, 2 V \ 10 uV, 20 V \ 100 uV, 200 V \ 1 mV, 1000 V \ 10 mV. TRMS AC Volts Ranges (20 Hz to 100 kHz): 200 mV, 2V-200V, 750 V. DC Amps (range \ resolution): 200 uA \ 1 nV, 2 mA \ 10 nA, 20 mA \ 100 nA, 200 mA \ 1 uA, 2000 mA \ 10 uA, 10A, 100 uA. TRMS AC Amps Ranges (20 Hz to 30 kHz): 200 uA - 20 mA, 200 mA, 2000 mA, 10 A. Ohms (range \ resolution): 200 ohm \ 1 m-ohm, 2 k-ohm \ 10 m-ohm, 20 k-ohm \ 100 m-ohm, 200 k-ohm \ 1 ohm, 2 M-ohm \ 10 ohm, 20 M-ohm \ 100 ohm, 200 M-ohm \ 10 k-ohm. Display: ±220,000 count LCD, 0.45 in. height; polarity, function, range, and status indication.
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