QUICK REFERENCE GUIDE

CH1 CH2 CH3 CH4 CH5 CH6 CH7 CH8

MODEL 199

SYSTEM DMM SCANNER

Digitized by the Internet Archive in 2025

INTRODUCTION

This quick reference guide contains information on front panel operation and IEEE-488 programming of the Model 199 System DMM as well as the optional Model 1992 Scanner. Also included are programming examples for various IEEE-488 controllers.

©1988, Keithley Instruments, Inc. Instruments Division Cleveland, Ohio, U.S.A. Document Number: 199-903-01 Rev. A

CONTENTS

SAFETY PRECAUTIONS ..... 1
CONTROL SUMMARY ..... 2
DISPLAY MESSAGES ..... 5
TRIGGERING ..... 6
DATA STORE ..... 7
DMM SETUP ..... 9
SCANNER OPERATION ..... 10
TYPICAL READING TIMES ..... 15
DEVICE-DEPENDENT COMMANDS ..... 16
SCANNER PROGRAMMING COMMANDS ..... 22
DATA FORMAT ..... 24
STATUS WORD FORMATS ..... 25
SRQ MASK AND STATUS BYTE FORMAT ..... 28
TRANSLATOR ..... 29
CONTROLLER PROGRAMS ..... 31

SAFETY PRECAUTIONS

1. Before operation, ground the instrument through a properly earth grounded power receptacle.

2. Before servicing, disconnect the instrument from the power line and all other equipment, and consult the Model 199 Instruction Manual.

3. Do not touch any terminals while the instrument is turned on or connected to any other test equipment.

4. Do not exceed the maximum input levels as stated in the specifications for the instrument (see the Model 199 Instruction Manual).

5. Use the special precautions listed in paragraph 2.6 of the Model 199 Instruction Manual when testing high-energy circuits.

TRIG SETUP

SHIFT/TRIG SETUP to enter menu.

NEXT to scroll to next menu option.

Trigger

「▲/▼」

CONTINUOUS: Reading, scanning, and storing rates controlled by INTERVAL.

DELAY

ONE SHOT.

0sec to 999.999sec

INTERVAL

[

SELECT OFF: Interval $ \geq $175msec, depending on other programmed parameters.

SELECT ON: User-programmed interval (15msec to 999.999sec).

DMM SETUP

SHIFT/DMM SETUP to enter menu.

NEXT to scroll to next menu option.

REV

Displays current software revision level.

MUX

[ $\triangle$ ▽ ]

MUX OFF: Turns off autocal routines for faster reading rates.

MUX ON: Recommended for best accuracy.

IEEE

Use numeric keys to program IEEE-488 primary address (0-30).

FREQ = 50Hz. Line frequency. FREQ = 60Hz. Line frequency. SAVE YES: Saves present configuration. SAVE NO LEDS ON: Test front panel LEDs and annunciators. LEDS OFF DEBUG YES: Enter troubleshooting mode. DEBUG NO RESET YES: Returns unit to factory default configuration. RESET NO

SCAN SETUP

SHIFT/SCAN SETUP to enter menu.

NEXT to scroll to next menu option.

POLE

2 POLE △/▼ L 4 POLE

Mode

• MANUAL: Allows channel to be manually closed with SCANNER key.