Keithley 191

The Keithley 191 DMM is a programmable, 5½-digit (200,000 counts) digital multimeter. DC volts and Ohms functions are standard, AC Volts optional. There are no current ranges excerpt with an external adapter.

Keithley 191
5½-digit multimeter
Keithley 191 front panel

Produced from 1979 to (?)

Manuals
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(All manuals in PDF format unless noted otherwise)

Key Specifications

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Components

Some Parts Used in the Keithley 191

Part Part Number(s) Class Description Used in
LM399 Monolithic integrated circuit heated zener reference DM5120 DM5520 Keithley 181 Keithley 191 Keithley 192 Keithley 193A Keithley 196
Motorola 6800 156-0426-00 156-2413-00 156-5472-01 Monolithic integrated circuit 8-bit microprocessor 021-0206-00 021-0374-00 067-0902-00 067-1137-99 222 222A 222PS 2424L 2445 2465 2467 4051 7250 7912 7912AD 7A16P 7A29P 7B81P 7B90P 833 834 835 836 CG5001 CG551AP CG5010 CG5011 DF1 DF2 DM5010 FG5010 MI5010 SI5010 PS5004 PS5010 SG5010 Keithley 181 Keithley 175 Keithley 175A Keithley 191 Keithley 192 Keithley 195 Keithley 195A Keithley 197 Keithley 220 Keithley 224 Keithley 230 Keithley 263 Keithley 485 Keithley 580 Keithley 617
Motorola 6821 156-0427-03 156-1205-00 Monolithic integrated circuit "Peripheral Interface Adapter (PIA)" 067-1137-99 4052 4052A 4054 4054A Keithley 191 7250 7A16P 7A29P 7B90P CG551AP CG5001 CG5010 CG5011