Keithley 192

6½-digit multimeter

Produced from 1979 to (?)

Manuals

Keithley 192 Operator's Manual (Rev.D 1981, with schematics, good scan)
Keithley 192 Instruction Manual (Rev.C 1984, with schematics)
Keithley 191/192 TRMS Option Manual (Rev.A 1981)
Keithley 1923/1923A GPIB Interface Manual (with schematics)

ROM Images

File	Pos.	Checksum
Keithley PRO-113-E7.5	U129	6ccd3daa
Keithley PRO-105-E7.5	U130	869462d1
Keithley PRO-116-E7.5	U134	063cc085

(All manuals in PDF format unless noted otherwise)

Manuals – Specifications – Links – Pictures

The Keithley 192 DMM is a programmable, 6½-digit (2,000,000 counts) digital multimeter. DC volts and Ohms functions are standard, AC Volts and GPIB optional. There are no current ranges excerpt with an external adapter.

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Key Specifications

DC Voltage	200 mV (AC:2 V) to 1200 V FS in decade ranges
DC Voltage	2 V to 1000 V FS in decade ranges (Opt.1910)
Resistance	200 Ω to 20 MΩ FS in decade ranges
Resolution	6½ digits (200 mV / 200 Ω ranges: 5½ digits)
Input	200 mV to 20 V DC ranges: ≥1 GΩ; above, 10 MΩ; AC ranges: 2 MΩ // 50 pF
Power	105–125 V or 210–250 V (90–11 V or 195–235 V for models with low-voltage transformer option), 50-400 Hz, ≤30W
Options	1019 Rack mounting kit 1910 AC voltage option 1920 TRMS AC voltage option (for 191 and 192) 1923 GPIB interface 1924 Rear inputs

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Links

Keithley 192 Teardown by Tony Albus @ YouTube

Documents Referencing Keithley 192

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Pictures

Display and controls
Analog board

Components

Some Parts Used in the Keithley 192

Part	Part Number(s)	Class	Description	Used in
2732		Monolithic integrated circuit	4K×8 EPROM	2445A • 2455A • 2465A • 2467 • DM5010 • Keithley 181 • Keithley 192 • Keithley 220 • Keithley 224 • TransEra 741-RTC
LM399	156-0783-00	Monolithic integrated circuit	heated zener reference	DM5120 • DM5520 • Keithley 181 • Keithley 182 • Keithley 191 • Keithley 192 • Keithley 193A • Keithley 196 • 1410 • 1411 • 1412
MC68488	156-1246-00	Monolithic integrated circuit	GPIB controller	7250 • 7854 • CG551AP • CG5001 • CG5010 • CG5011 • Keithley 181 • Keithley 192
MOS Technology 6522	156-1539-00	Monolithic integrated circuit	"Versatile Interface Adapter (VIA)"	FG5010 • MI5010 • SI5010 • Keithley 181 • Keithley 181A • Keithley 192 • Keithley 193A • Keithley 195 • Keithley 195A • Keithley 196 • Keithley 199 • Keithley 220 • Keithley 224 • Keithley 230
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 182 • 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