Keithley 175

4½-digit TRMS digital multimeter

Produced from 1983 to (?)

Manuals

ROM/PLD Images

File	Pos.	Checksum

(Manuals are OCRed PDF files unless noted otherwise)

Manuals – Specifications – Links – Pictures

The Keithley 175 is a 4½-digit LCD True-RMS, auto-ranging digital multimeter. It features rudimentary built-in logging capabilities and an optional GPIB interface.

Key Specifications

Voltage	200 mV to 1000 V decade ranges
Current	200 μA to 10 A decade ranges
Resistance	200 Ω to 20 MΩ decade ranges
Display	4½ digits, LCD

Options:

Model 1758 Rechargeable Battery Pack
Model 1753 IEEE-488 Interface

Internals

The GPIB interface (1753) communicates with the base instrument over an opto-isolated serial port. It uses a separate MC146805 CPU.

Picture

GPIB Option, Keithley 1753

Components

Some Parts Used in the Keithley 175

Part	Part Number(s)	Class	Description	Used in
2732	156-1403-00 • 156-1598-00	Monolithic integrated circuit	4K×8 EPROM	2445A • 2455A • 2465A • 2467 • DM5010 • Keithley 175 • Keithley 181 • Keithley 192 • Keithley 220 • Keithley 224 • TransEra 741-RTC
2764		Monolithic integrated circuit	8K×8 EPROM	5D10 • 7A42 • AA5001 • DA4084 • Keithley 175 • Keithley 485 • Keithley 580
AD637		Monolithic integrated circuit	Wideband RMS/DC converter	DM5120 • DM5520 • Keithley 175 • Keithley 199
Motorola 6805	156-0426-04	Monolithic integrated circuit	8-bit microprocessor	2424L • 2245A • Keithley 175 • Keithley 175A • Keithley 1753 • Keithley 197 • Keithley 263 • Keithley 485 • Keithley 4853 • Keithley 580 • Keithley 617 • TDS520
Motorola 6821	156-0427-03 • 156-1205-00	Monolithic integrated circuit	Peripheral Interface Adapter (PIA)	067-1137-99 • 4041 • 4052 • 4052A • 4054 • 4054A • 4662 • 4692 • Keithley 175 • Keithley 191 • 50M10 • 50M20 • 50M30 • 50M40 • 50M70 • 7250 • 7A16P • 7A29P • 7B90P • CG551AP • CG5001 • CG5010 • CG5011
TMS9914	156-1444-00 • 156-1444-01 • 156-6223-02	Monolithic integrated circuit	GPIB controller	11301 • 11301A • 11302 • 11302A • 2220 • 2221 • 2224 • 2230 • 2424L • 2430 • 2430A • 2440 • 370 • 370A • 370B • 371 • 371A • 4041 • 4052A • 4054A • 021-0374-00 • 067-1137-99 • AA5001 • AM700 • DA4084 • DC5009 • DC5010 • DM5010 • DM5110 • DM5120 • DM5520 • FG5010 • MI5010 • SG5010 • SG5030 • SI5010 • SI5020 • PS5004 • PS5010 • Keithley 175 • Keithley 175A • Keithley 182 • Keithley 193A • Keithley 195 • Keithley 195A • Keithley 196 • Keithley 197 • Keithley 199 • Keithley 220 • Keithley 224 • Keithley 230 • Keithley 263 • Keithley 485 • Keithley 617 • TDS420 • TDS420A • TDS460 • TDS520