Keithley 181

The Keithley 181 is a digital nanovoltmeter.

Keithley 181
Nanovoltmeter Keithley 181 frontal view Produced from (?) to (?) Manuals Keithley 181 Operators Manual 30918B, 1980 Keithley 181 Service Manual 30816B, 1981 Keithley 181 Operators Manual 32421A, 1982 (with schematics) (All manuals in PDF format unless noted otherwise)

Key Specifications

Voltage	2 mV to 200 mV FS in decade ranges on "mV" input, 2 V to 1000 V FS in decade ranges on "V" input
Input	>1 GΩ, max. 120 V on "mV" input, 10 MΩ, max. 1000 V on "V" input
Resolution	5½ digits (10 nV to 10 mV LSD
Noise	<30 nV_p-p on lowest range with filter on
Features	GPIB standard

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