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
Main board
Main board, PSU and GPIB interface

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