Keithley 1992, 199 User Manual

INTRODUCTION

This quick reference guide contains information on front panel operation and IEEE-488 programming of the Model

199 SystemoMM as well as the optional Model 1992 Scanner. Also included are programming examples for various IEEE-488 co”mllers.

01998. Keith& Instruments, Inc.

Document Number: 199-903-01 Rev. A

Cleveland, Ohio, U.S.A.

CONTENTS

SAFETY PRECAUTIONS. CONTROL SUMMARY. DISPLAY MESSAGES. TRIGGERING. . DATA STORE. DMM SETUP .,.. SCANNER OPERATION.. TYPICAL READING TIMES

DEVICE-DEPENDENT COMF SCANNER PROGRAMMING DATA FORMAT . STATUS WORD FORMATS. SRO MASK AND STATUS E TRANSLATOR CONTROLLER PROGRAMS

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COMMANDS.

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IYTE FORMAT.

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2.9 29 31

SAFETY PRECAUTIONS

1. Beforeoperation. ground the instrument through a properly earth grounded power receptacle.

Z&fore servicing. disconnect the instrument from the

power line and all other equipment, and consult the Model

199 Instruction MamaI.

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 es stated in the specifications for the instrument bee the Model 199 Instruction Manuall.

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

CONTROL SUMMARY

TRIG SETUP

SHIFT/TRIG SETUP to enter menu. NEXT to scroll to next menu option

CONTINUOUS: Reading, scanning. and storing mtes controlled bY INTERVAL.

Trigger

‘:’

ONE SHOT.

DELAY

INTERVAL “C

DMM SETUP

SHIFTDMM SETUP to enter menu. NEXT to scroll to next menu option. REV

MUX

IEEE

Osec to 999.999sec

SELECT OFF: Interval 2175msec. depending on other programmed parameters.

SELECT ON: User-programmed interval

mnsec to 999.999sec).

Displays current software revision level.

MUX OFF: Turns off eutocal routines for

faster reading rates.

AIV

MUX ON: Recommended for best

*ccur*cy.

Use nuneric keeys to program IEEE488

primary address (0.30).

FRE(1

A/V

L FREQ=GOHZ. Line frequency.

SAVE YES: saves present

r FREO=BOHZ. Line frequency.

co”fig”ration.

SAVE

A/V

r L SAVE NO

LEDS ON: Test front panel LEDs and annunciator*.

LEDS

A/I

L -LEDS OFFS

DEBUG YES: Enter troubleshooting mode.

DEBUG

A/V

L DEBUG NO

RESET YES: Returns Ynit to factory default configuration.

RESET

L’

Lo RESET NO

SCAN SETUP

SHIFT/SCAN SETUP to enter menu. NEXT to scroll to next menu option.

POLE

2 POLE

.:.

L 4POLE

MANUAL: Allows channel to be manua,,y closed with SCANNER key.

Mode

RATIO

l Ratio operates only on a fixed ange.

* Range changes will restart et channel 1. * In MANUAL, et least one reading must be taken on chan-

nel 1 before attempting to display ratio on channels 2-S

A/V-STEP: Increments one channel per in-

L terval p’ trigger.

SCAN. Scans one set of channels per interval or trigger fminimum time abetween channels).

ON: Channels 2 through 8 referenced

to channel 1.

A/V

I- OFF

DISPLAY MESSAGES

Message

OVERFL

NO RANGE NO FUNC SHIFT AC ONLY TRIGGER

OVERRUN

INTERVAL

OVERRUN UNCAL NO DATA

NO SCANNER

CAL LOCKED

CHAN 4 MAX CHAN 8 MAX Channel 8 limit IZ-pole1 CONFLICT Invalid state when calibrating. NO REMOTE* Unit not in remote when program-

IDDC” IDDCO’

BIG STRING’ Siring longer than 10 characters

TRANSERR’ Translator error.

‘IEEE-488 bus programming only.

/ Description I

Overrange Pressing range button while in dB Invalid shifted function entry. Shift mode in effect. Selecting dB with unit not in AC. Unit triggered before reading is done. Interval too short for present configuration. EEPROM failure uoon Dower UD.No data in data store when recalling. Pressing SCANNER or SCAN SETUP with no scanner. Attempting calibration with calibration locked. Channel 4 limit (Cpole)

ming over bus. Illegal device-dependent command. Illegal device-dependent command cotion.

with D command.

TRIGGERING

1. Press SHIFT TRIG SETUP then uprange or downrange to select CONTINUOUS trigger made.

2. Press NEXT and then program desired trigger delay (delay affects only first reading in continuowJ.

3. ~Press NEXT and then use uprangeldownrange for SELECT OFF (175msecI or user-progammed (SELECT ON). Key in interval fl!Smsec-999.999sec) if selected, then press

NEXT.

4. Unit displays readings at programmed intervals. “INTERVAL OVERRUN” message indicates programmed interval is too short for present instrument configuration (with data store or scanner only,.

One Shot

1. Press SHIFT TRIG SETUP~then uprange or downrange to select ONE SHOT trigger mode

2. Press NEXT, and then program desired trigger delay (delay affects each reading in one shot).

3. Press NEXT to return to normal display.

4. Press TRIGGER or apply pulse to TRIGGER INPUT to initiate reading. One trigger per reading is required in one shot

DATA STORE

Continuous Data Storage

1. Program the continuous trigger mode and desired interwl

using TRIG SETUP. 2,Press SHIFT STORE to enter data store.. 3,Program the number of readings to store Isize) in the

range of 1 to 500. or select a size of 000 for wrap-amund

data store operation.

4.Press NEXT to return to normal display. S.Press TRJGGER to initiate data storage. RCL will blink

when all readings have been stored.

6. Press any function button to turn off data store.

One-shot Data Storage

1. Program the one-shot trigger mode using TRIG SETUP. 2,Press SHJFT STORE to enter data store. S.Pmgram the number of readings (size1 in the range of 1

to 500. or select a size of 000 for wrawxound storage.

4.~Press NEXT to return to normal display.

5.Press TRIGGER to trigger reading and store it One trig-

ger per reading is required in the one-shot trigger mode

G.RCL will flash when all readings have been stored.

7.Press a function key to cancel data storage.

Recalling Data

1. Press SHIFT RECALL to enter the recall mode The unit will display the last stored reading number.

2.Press NEXT to display the reading.

3. Use uprange or downrange to scroll through readings. The scroll rate becomes more rapid after holding button in.

4.Press RECALL to display reading number, then press NEXT to return to reading.

5.Press NEXT to exit recall.

Press SHIFT-DMM SETUP to *ccess modes below. Use

NEXT to scroll through setup menu.

REV--Briefly displays current software revision level.

MUX ON/OFF-Use uprange or downrange to select on/off. Operating unit in MUX OFF turns off autocal routines, which speeds up reading rate and minimizes noise spikes at in-

put. Accuracy is reduced in MUX OFF.

IEEE-Use numeric keys to program IEEE-488 primary address JO-30). Use SAVE to permanently change address.

FREQ=50/60HZ-Use uprange or downrange to select

operating frequency. Selected frequency must agree with power line frequency for optimum noise performance.

SAVE YES/NO-Select operating modes then SAVE YES to store present instwment configuration. Unit will assume the saved configuration upon power up, or after receiving

IEEE-488 DCL or SDC commands.

LEDS ON/OFF-Use uprange or downrange then press

NEXT to ten front panel LEDS.

DEBUG ON/OFF-Use uprange or downrange then press

NEXT to enter diagnostic program. Press any key except TRIGGER to exit program.

RESET YES/NO-Select RESET YES with uprange or downrange to return the unit to factory default conditions.

Use SAVE after RESET to restore power up default to factory default conditions.

SCANNER OPERATION

Manual Channel Control

1. Press SHIFT SCAN SETUP, then program 2Wpole mode with uprange or downrange.

2.Press NEXT, then select MANUAL mode with uprange or downrange

3.Press NEXT. then select ratio onloff with uprange or downrange.

4.Press NEXT to return to normal display.

&Press SCANNER followed by the number of the channel

to close 11-8). The unit will display the closed channel

number in the right-most digit.

6. Press SCANNER 0 to open any closed channel and return

to normal operation.

Step Mode

1. Press SHIFT SCAN SETUP, and program 2/4 pole mode.

2.Press NEXT, then use uprange/downrange to select STEP mode.

3.Press NEXT, and select ratio on or off as desired,

4.Press NEXT to return to normal operation.

S.For interval scanning, use TRIG SETUP to select con-

tinuous trigger mode, delay, and to program the desired interval between channels.

&For triggered scanning, use TRIG SETUP to select one-

shot trigger mode and delay.

7.Press SCANNER, then program the desired channel limit fmaximum limit = 4 for 4pole mode).

8.lf interval scanning was selected. the unit will begin scanning one channel per interval. The closed channel will appear in the display.

!Xlf triggered scanning was selected, press TRIGGER fo

start the scan. One trigger per channel will be required.

lO.To exit the scan mode, press SCANNER 0.

scan Mode

1. Press SHIFT SCAN SETUP, and program 2/4pole mode. Z.Press NEXT. then use uprangeldownrange to select

SCAN mode.

3.Press NEXT, and select ratio on or off as desired.

4.Press NEXT to return to normal aperation. S.&x interval scanning, use TRIG SETUP to select con-

tinuous trigger mode, delay, and to program the desired interval between setsof channels.

&For trigge& scanning, use TRIG SETUP to select one-

shot trigger mode and delay.

7.Press SCANNER, then program the desired channel limit haximum limit = 4 for 4-p& mode).

S.lf interval scanning was selected, the unit will begin

scanning one set of channels per interval. The closed channel will appear in the right-most digit of the display.

S.lf triggered scanning was selected, press TRIGGER to

start the scan. One triggerper set of channels will be required.

lO.Ta exit the scan mode, press SCANNER 0.

Interval Ema store Scanning

1. Press SHIFT TRIG SETUP, and select CONTINUOUS trigger mode.

2.Press NEXT, and program desired trigger delay lOmsec-999.999sec,.

3.Press NEXT and choose SELECT OFF (default 176msecI or SELECT ON (user programmed interval,

15msec-999.999secl. For SELECT ON, key in desired

interval, then press NEXT.

4.Press SHIFT SCAN SETUP, and select the 2Kpole mode.

5Press NEXT, and then use uprange or downrange TO

select the STEP or SCAN mode, as required.

6.Press NEXT, and program the ratio mode.

7.Press NEXT to return tc normal display.

&Press SHIFT STORE, then program the data store size.

9.Press NEXT to return to normal display.

tO.Press Trigger tc initiate scanning and storage on chan-

nel 1 simultaneously.

One-shot Rigger Data Store Scanning

1. Press SHIFT TRIG SETUP. and select ONE SHOT trig-

ger mode.

2,Press NEXT, and program desired trigger delay

(Omsec-999.999sec).

3.Press NEXT to return to normal display.

4.press SHIFT SCAN SETUP, and select the Z/4 pole mode S.Press NEXT, and then use uprange or downrange to

select the STEP or SCAN mode. as required.

&Press NEXT, and prcgram the ratio mode

7.Press NEXT tc retur? to normal display.

9.Press SHIFT STORE, then program the dam store size S.Press NEXT to return to normal display.

10. Ress TRIGGER to initiate scanning and storage on channel 1 simultaneously. One trigger per channel is required

in the STEP mode, and one trigger per set of channels is required in the SCAN mode.

Determining Scannlng Interval

l Scanning without selecting interval

-Program ,NTER”AL SELECT to OFF.

-Interval is s175msec. depending on other selected parameters.

-INTERVAL OVERRUN message will not be displayed.

l Minimum Interval Time Calculation

--Interval time is the sum of:

1. (conversions per channel1 x Iconversion time1

2. Programmed DELAY time per channel

3. Break-before-make time l17msecl

4. Auto range time (if usedl

-In STEP mode, calculated time above is the INTERVAL

setting.

-In SCAN mode, (sum of l-41 x (number channels scanned) is the minimum interval setting.

l When using the scanner with STEP or SCAN switching,

the DMM will take readings on each channel as if it were in the one-shot mode whether programmed to CONTINUOUS or ONE SHOT:

-Conversions are automatically synchronized to chan-

nel closures. Channels will not close in the middle of conversions.

-Any programmed DELAY is inserted between channel closure and start of conversion (with scanner disabled, DELAY is inserted between trigger and start of conversionI.

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