Keithley 199 User manual
WARRANTY
Keithley Instruments, Inc. warrants tbis product to be free from defects in material and workmanship for a period of 1 year from date of
shipment.
Keithley Instruments, Inc. warrants the following items for 90 days from the date of shipment: probes, cables, rechargeable batteries,
diskettes, and documentation.
During the warranty period, we will, at our option, either repair or replace any product that proves to be defective.
To exercise this warranty, write or call your local Keithley representative, or contact Keithley headquarters in Cleveland, Ohio. You will
be given prompt assistance and return instructions. Send the product, transportation prepaid, to the indicated service facility. Repairs
will be made and the product returned, transportation prepaid. Repaired or replaced products are warranted for the balance of the origi-
nal warranty period, or at least 90 days.
LIMITATION OF WARRANTY
This warranty does not apply to defects resulting froti~product modification without Keitbley’s express written consent, or misuse of
any product ox-part. This warranty also does not apply to fuses, software, non-rechargeable batteries, damage from batteIy leakage, or
problems arising from normal wear or failure to follow instmctions.
THIS WARRANTY IS IN LIEU OF ALL OTHER WARRANTIE S, EXPRESSED OR IMPLIED. INCLUDING ANY IMPLIED
WARRANTY OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR USE. THE REMEDIES PROVIDED HEREIN ARE
BUYER’S SOLE AND EXCLUSIVE REMEDIES.
NEITHER KZITHLEY INSTRUMENTS, INC. NOR ANY OF ITS EMPLOYEES SHALL BE LIABLE FOR ANY DIRBCT, INDI-
RECT, SPECIAL, INCIDENTAL OR CONSEQUENTIAL DAMAGES ARISING OUT OF THE USE OF ITS INSTRUMENTS AND
SOFTWARE EVEN IF KEITHLEY INSTRUMENTS, INC., HAS BEEN ADVISED IN ADVANCE OF THE POSSIBILITY OF
SUCH DAMAGES. SUCH EXCLUDED DAMAGES SHALL INCLUDE, BUT AR!? NOT LIMITED TO: COSTS OF REMOVAL
AND INSTALLATION, LOSSES SUSTAINED AS THE RESULT OF INJURY TO ANY PERSON, OR DAMAGE TO PROPERTY.
SAFETY PRECAUTIONS
The following safety precautions should be observed before operating the Model 199.
This instrument is intended for use by qualified ~personnel who recognize shock hazards and are familiar
with the safety precautions required to avoid possible injury. Read over the manual carefully before operating
this instrument.
Exercise extreme caution when a shock hazard is present at the instrument’s input. The American National
Standards Institute (ANSI) states that a shock hazard exists when voltage levels greater than 3OV rms or
42.4V peak are present. A good safety practice is to expect that a hazardous voltage is present in any unknown
circuit before measuring.
Inspect the test leads for possible wear, cracks or breaks before each use. If any defects are found, replace
the test leads.
For optimum safety do not touch the test leads or the instrument while power is applied to the circuit under
test. Turn the power off and discharge all capacitors, before connecting or disconnecting the instrument.
Always disconnect all unused test leads from the instrument.
Do not touch any object which could provide a current path to the common side of the ,+cuit under test
or power line (earth) ground. Always make measurements with dry hands while standmg on a dry, in-
sulated surface, capable of withstanding the voltage being measured.
Exercise extreme safety when~testing high energy power circuits (AC line or mains, etc). Refer to the High
Energy Circuit Safety Precautions found in paragraph 2.6 (Basic Measurements).
Do not exceed the instrument’s maximum allowable input as defined in the~specifications and operation
section.
MAXIMUM READING RATES (Readings/Second)’ STORAGE & SCANNING CAPABILITIES
IEEE-488 BUS IMPLEMENTATION GENERAL
MULTILINE COMMANDS: DCL, LLO. SDC, GET, GTL,
UNT, UNL, SPE. SPD.
UNlLiNE COMMANDS: IFC, REN, EOI, SRQ. ATN.
INTERFACE FUNCIlONS: SHl, AHI, T6, TFQ, L4, LEO,
SRl, RLI. PPO, DCl, DTl, CD. El.
All front pane, functions and programs are available over
the IEEE-488 bus, in addition to Status, Swice Request, Out-
put Format, EOI, Trigger, Terminator, Display Message, and
Non-Volatile TRANSLATOR.
IEEE-488 address is programmable from the front panel.
_,I
MAXIMUM READING: 302,999 cmmts in SK-digit mode.
CONNECTORS: Measurement: Switch selectable front or
rear, safety jacks. DigitaL TRIGGER input and METER
COMPLET!? output on rear panel, BNCr.
WARMUP: 2 hours to rated accuracy.
TEMPERATURE COEFFICIENT ,04-18’C & 28’-50’0:
c t(O.1 x applicable accuracy sp&fication)l°C.
ISOLATION: Input LO to IEEE LO or power line ground:
5wV peak. 5 x IO’ V-Hz maximum. > lo90 paralleled by
4wpF.
OPERATING ENVIRONMENT: O”-5O”C, 80% re,ativ&
humidity up to 35°C; linearly derate 3% RH/‘C, 35”.M”C
(0%40% RH up to 28OC on 300MI-i range).
STORAGE ENVIRONMENT: -2Y to +WC.
POWER: IOS-125V or ZlC-25OV, rear panel switch selected,
5oH.z or MIHz, ZOVAmaximum. 9UllOV and 180-ZOV MF
sions available upon request.
DIMENSIONS, WSIGKT: 90mm high x 220mm wide x
33hm deep (3% in. x 81 in. x 12% in.). Net weight 3kg
(6 lbs., 8 oz.).
MODEL 1992 SCANNER OPTION
CONTACT CONFIGURATION: 8-channel 2-p&, or
4channel 4pole.
CONTACT POTENTIAL: <lpV per contact pair.
MAXIMUM SWITCHING RATE: 40 channels/second, in-
cluding Model 199 4’/r-digit DCV reading time.
CONNECTOR TWE: Quick disconnect screw ~y$inaIS, X’?~
AWG maximum wire size.
MAXIMUM SIGNAL LEVEL: 200” peak, lM)mA, resistive
load.
CONTACT LIFE: 210’ operations (at maximum signal
level); >I@ operations (cold switching).
CONTACT RESISTANCE: <Xl.
ISOLATION BETWEEN ANY TWO TERMINAL5 >lO%
<75pF.
lSOLATION BETWEEN ANY TERMlNAL AND EARTH:
> 10% < 15OpF.
COMMON MODE VOLTAGE: 35oV peak between any ter-
mhaf and earth.
MAXIMUM VOLTAGE
BETWEEN ANY TWO TERMINALS: 2OOV peak.
MAXIMUM VOLTAGE BEI’WEEN ANYTERMINAL AND
MODEL 19; INPUT Lo: 2oOV peak.
DIMENSIOhi; WEIGHT: 25mm hieh x 13Omm wide x
170mm deep (% in. x 5 in. x 6% ic). Adds 0.3kg (8 0~)
to Model 199.
SO&Reading Memory: Stores reading, range, and
scanner channel.
Trigger: One shot or continuous from front pane,,
IEEE.488 bus. and rear panel BNC.
Programmable Reading Interval: 15ms to 999.999s.
Programmable Trigger Delay: Ims to 999.9995.
WITH MODEL 1992 &CHANNEL SCANNER
Pmgmmmable Configuration: t or 4-pole.
Fmgrammable Channel Limit: 1 to 8.
Pmgnmmable Scanning Moder: Manual, step,
and scan.
Ratio: Channels 2 thmugh 8 referenced to Channel 1.
ACCESSORlES SUPPLIED: Model ,751 Safety Test Leads,
Instruction Manual.
ACCESSORlES AVAILABLE:
Model 1992: B-Channel Scanner
Model 1993: Quick Disconnect Scanner Conn&tor Kit
Model 199&l: Single Fixed Rack Mounting Kit
Model 1998-2: Dual Fixed Rack Mounting Kit
Model 1651: SO>Ampere Shunt
Model 1681: Clip-On Test Lead Set
Model 1682A: RF Probe
Model 1685: Clamp-On Curem Probe
Model 1751: General Purwse Test Leads
Model 1754: Universal T&t Lead Kit
Mode, 5806: Kelvin Clip Leads
Model 7W7-1: Shielded IEEE-488 Cable. Im
Model 7007-2: Shielded IEEE-488 Cable, 2m
Model 7008-3: IEEE-488 Cable, 0.9m (3 ft.)
Model 7008.6: IEEE-488 Cable, 1.8m (6 ft.)
specifications+ect to changewithout“otke.
199 Front Panel Operation
TRIG SETUP
SHIFT/TRIG SETUP toenternwnu.
NEXT to scroll to next menu option.
r
Trigger A:’
DELAY
r
INTERVAL A/W
L
CONTINUOUS: Reading, scanning, and storing
rates contmlled by INTERVAL.
ONE SHcrT.
Osec to 999.999sec
SELECT OFF: Interval 2I75msec. depending on
other programmed parameters.
SELECT ON: User-pmgrammed interval (Ismsec to
999.9994.
DMM SETUP
SHIFUDMM SETUP to enter menu.
NEXT to scroll to next menu option,
REV
MUX
IEEE
FREQ
SAW
LEDS
DEBUG
NSET
Displays current software revision level.
MUX OFF: Turns off autocal mufir% for faster
reading rates.
MUX ON: Recommended for best accuracy.
Use numeric keys to program IEEE-488 ptimary ad-
dress (O-30).
FREQ=SOHZ. 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
ONE-SH(TT OPERATION
In the oneshot trigger mode, each reading consists of multiple conver-
sions to fill the Running Average User Filter (30 canvenions), or the Run-
ning Average Internal Filter (5%d only, varies by ranges and function--
see manual). For this reason, trigger-to-reading time could be several
seconds, depending on iiltering. When filters are off (‘TO” command wer
the bus can be SAvEd), readings are made up of only one conversion.
STORE
- SHIFT/STORE to enter data store.
* SIZE = 1 to 500, or SIZE = 000 for wrap around.
* NEXT to exit size select.
- TRIGGER to initiate storage.
* Any function key to cancel storage.
- RCL flashes when data store is full.
RECALL
* SHIFURECALL to enter recall.
* NEXT to view data at displayed location.
* A or V to scroll through locations.
* RECALL again to select desired location. ,,, ~,,,,,,,,
- NEXT to display data.
- NEXT to exit recall mode.
ERROR MESSAGES
UNCAL
OVERFL
TRIGGER OVERRUN
INTERVAL OVERRUN
AC OI’KY
NO RANGE
CAL LOCKED
CONFIiCT
NO DATA
NO SCANNER
EEPROM failure on power up
OWTa”ge
Unit triggered while processing reading.
Interval too short for selected configuration.
dB selected with unit not in ACV or ACA.
Pressing range button in dB.
Calibration locked out when calibmtine
Unit in invalid state when calibrating &.,
autorange).
Entering recall with no data stored
Scanner not installed.
TYPICAL 5% DIGIT CONVERSION TIMES
MUX ON, DCV, ACV, AU: 1lOmsec (U3msec)
MUX OFF: Z&nsec (33msec)
MUX ON, OHMS, 3ookn range and lower: 1lOmsec (l33msec)
MUX OFF: 63msec (76msec)
(Times in parenthesis are for 50Hz operation)
TYPICAL AUTORANGING TIMES
DCV, DCA 35amsec
ACV, ACA 1.4sec
OHMS (3OOkn range and
lower, 500msec
(Tffes shown are to coIIeCt range and do not include conversion times for
final reading.)
Scanner Operation
r
POLE A/T
;
Mode A/V
L
RATIO *L
L
2POLE
4 POLE
MANUAL: A!lows channel to be manuaJly closed
with SCANNER key.
STEP: lnaements one channel perintenral or trigger,
SCAN: Scans one set of channels per interval or trig-
ger (minimum time between channels).
ON: Channels 2 through 8 referenced to channel 1.
OFF
l Ratio operates only on a fixedrange.
l Range changes will restart at channel 1.
l In MANUAL, at least one reading must be taken on channel 1before at-
tempting to display ratio on channels Z-8.
ACTIVATING THE SCANNER
SCANNER followed by number (%3) activates the scanner.
- In MANUAL, channel number selects channel to be dosed.
l In STEP or SCAN, number selects channel limits and starts scanning
process.
STOPPING THE SCANNER (openingauaam&)
SCANNER followed by “0’:
DETERMINING SCANNING INTERVAL
- scanningwithouts&dinginterval
--Program INTERVAL SELECT to OFF.
-Interval is sl75msec. depending on other selected parameters.
--INTERVAL OVERRUN message wi!J not be displayed.
l Mienurn Interval Tiie Calculation
-Interval time is the sum oE
1. (conversions per channel) x (conversion time)
2. Programmed DELAY time per channel
3. Break-before-make time (17msec)
4. Auto range time (if used)
--In !XEP mode, c&l&d time above is the INTERVAL setting.
-In SCAN mode, (sum of l-4) x (number channels scanned) is the
minimum interval setting.
SCANNER OPERATION NOTES
l When using the sc.mner with STEP or SCAN switching, the DMM wi!J
takereading~oneachcharmel ssifit were in&one-shot mode whether
pmgmmmed to CONTlNUOUS or ONE SHOT:
-Conversions are automatically synchronized to channel 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 bet-
ween trigger and start of conversion).
-Readings on each channel consist of multiple conversions to fill the
Running Average User Filter (30 conversions), 01 Running Average
Internal Filter when active (51hd only, varies by range and function;
see manual).
* Scanner switching is break-before-make. The time required to change
channels is approximately 17rwc. which includes break-before-make
relay time settling time.
l When using the scanner with ACV or ACA, a DELAY time must be
programmed to accomcdate AC converter settling time (typically >lsec).
See Model 199 sp&fications.
*The scanner operates with the set of insirument parameters program-
med prior to stat of scanning. Chanpinp any of these parameters, range
function, filter, etc., during scanning will restart the scanner at than-
~11. Use autorange if range changes are required while scanning.
USING SCANNER WITH DATA STORE
l Select desired scanner parameters and interval.
l Activate scanning (SCANNER, channel limit).
- Program data store size.
. TRIGGER vd, start data store and automatically restart scanning at than-
nel 1 synchronized with data store location 1.
EXAMPLE’ OF FAST SCANNING
1. Select 3V DC range and function, 4%-d@ resolution, FLTR off.
2. Program ONE SHOT trigger.
3.Select SCAN mode.
4. Select SCANNER ‘8” to set limit to 8.
5. Use TRIGGER to initiate a scan of the set of eight channels.
199 IEEE-488 Programming
DEVICE-DEPENDENT COMMANDS
EXECUTE
X Execute other device-dependent commands
FUNCTION
Fo DC volts
R AC volts
F2 Ohms
53 DC current
E AC current
ACV dB
F6 ACA dB
RANGE A’3 ACA
DCV ACV DCA ACA Ohms dB dB
Ro Auto Auto Auto Auto Auto Auto Auto
s 3OOmV3WmV3OmA3OmA 300d ‘Auto A&
3V 3V 3A 3A 3kl-i Auto Auto
R3 306’ 3OV 3A 3.4 3Okn Auto Auto
R4 300V 300V 3A 3.4 3OOM Auto Auto
z 3oOV 30%’ 3A 3.4 3Mn Auto Auto
3mv 3wv 3A 3A 30MR Auto Auto
R7 3OOV 3wV 3A 3A 3OOMO Auto Auto
ZERO Zero disabled
Zero enabled
Zero enabled using a zero value (V)
FILTER
PO
Pl
P2
Internal and front panel filter disabled
Internal filter enabled
Front panel filter enabled
RATE
so
Sl 4%digit resolution, 2.59msec integration period
5%digit resolution, lie cycle integration
(16.67msec. 6OHz; 2Omsec, 50Hz)
TRIGGER MODE
m ContinuousonTalk
n One-shot on Talk
T2 Continuous on GET
T3 One-shot on GE?
T4 co”tin”o”s on x
T5
T6
T7
One-shot on X
Continuous on External Trigger
One-shot on External Trigger
READING
BO
z
MODE
Readings from AID converter
Individual readings from data store
All readings from data stwe (buffer dump)
DATA STORE SIZE
IO Wrap around data store mode
h Data store of n (n=I to 500)
INTERVAL
Q’J
Qn Default interval, l75msec (SELECT OFF)
n=intwval in milliseconds (l5msec to
999999msec)
VALUE
v*nn.nnnn or Calibration value, zzo value
v*n.nnnnnrtE+n
CALIBRATION
co Calibrate first point using value (V)
2 Calibrate second point using r&e (V)
Cd&rate third point using value (V)
DEFAULT CONDITIONS
Lo Restore factory default conditions and save (Ll)
L* Saw present machine states as default conditions
DATA FORMAT
GO Reading with prefix.
Gl Reading without prefu.
G2 Reading and buffer location with prefix.
G3 Reading and buffer I&ion without prefix.
G4
G5 Readingand channel with prefix.
Reading and channel without prefix.
G6
G7 Reading, buffer location, and channel with prefix
Reading, buffer location, and channel without
prefix
SRQ
MO Disable
Ml Reading overflow
M2 Data stcre full
M4 Data store half full
MB Reading done
Ml6 Ready
M32 Fmx
EOI AND BUS HOLD-OFF
Ko Enable EOI and bus hold-off on X
E Disable SO,, enable bus hold-off on X
Enable EOI, disable bus hold-off on X
K3 Disable both EOI and bus hold-off on X
TERMINATOR
MI
ii
Y2
n
CR LF
LFCR
STATUS
UO
Ul
uz
u3
u4
u5
MULTIPLEX
A0
Al
DELAY
Wll
SELFTEST
JO
Send machine status word
Send error conditions
Send Translator word list
Send buffer size
Send current value of ‘?I’
Send input switch status (front/rear)
AukKzd multiplez disabled
Auto/Cal multiplex enabled
n=delay period in milliseconds, (Omsecto
999999msec)
Test, ROM, RAM, E?‘ROM
HIT BUTTON
HKl Hit front pane, button number n
DISPLAY
Da Display up to 10 character message. a=character
D Cancel display made
SCANNER PROGRAMMING COMMANDS
SCANNER SETUP
MANUAL
NO Auchannelsopen
Z-pole
1
Nl
NZ
N3
N4
N5
N6
N7
N8
NY
!5lXP
NlO
6
7
8
CHANgMAXERXOR
Nil
NE2
Nl3
N14
Nl.5
N16
Nl7
NT3
N19
SCAN
N20
Stop scan, all channels open
Z-Pole Limit
1
z
4
5
6
i
CHAN 8 MAX ERROR
N21
N22
NW
N24
N25
N26
Stop scan, all channels open
Z-Pole Limit
1
POLE/RATIO
E Z-pole
4-p&
02 Z-pole ratio
03 4-p& ratio
SCAN INTERVAL
QO Default 175msec interval
(SELECI OFF)
Qn n=tnterval in msec
(15.999999mxc)
TRIGGER DELAY*
wn n=delay in msec
(O-999999msec)
*Delay to be used as channel settling time.
4-p&
:.
3
4
CHAN4MAXERROR
CHAN4MAXERROR
CHAN4MAXERROR
CHAN4MAXFRROR
CHAN4MAXERXOR
STATUS WORD FORMATS
UO Status Word Format
Ul Status Word Format
4Pole Limit
1
2
:
CHAN4MAXERROR
CHAN 4 MAX ERROR
CHAN 4 MAX ERROR
CHAN 4 MAX ERROR
CHAN 4 MAX ERROR
L
DATA FORMAT
4Pole Limit
1
2
3
4
CHAN4MAXRRROR
CHAN4MAXERROR
CHAN4MAXERROR
CHAN4MAXERROR
U2: Returns Translator word list.
U3: Returns data store size (SZE = CCQ.
U4: Returns present value programmed with V command in floating
p0illt.
u5: Returns INPLJT switch status (O=fmnt, l=rear).
SRQ MASK AND STATUS BYTE FORMAT
TRANSLATOR
Translator Words and Characters
-miis.latorword
or character Description
ALIAS Defmes Translator words.
B Terminates definition string.
Wildcard definition character.
NEW Enabled Translator.
OLD Disables Translator.
SAVE Saves Translator words as power-up default.
LIST Returns list of Translator words.
FORGET Purges Translator words from memory
Table Of Contents
SECTION l-General Information
1.1
1.2
1.3
1.4
1.5
1.6
1.7
1.8
1.9
1.10
INT?““-‘^“’
INTRODUCTION ~._~. . ._.~__~__~
FE.4FEATURES .~. _~...t . __.L____~_-. ^___
WARRANTYWARRANTY INFORMATION . . .,t..,,. . . I
MANUAL AIMANUAL ADDENDA _. . . ____.,_,_~.,I
SAFETY SYMBOLS AND TEESAFETY SYMBOLS AND TERMS __. .~. ,.,_” I . 1. AU._ a i”..?/V,“7,,_.i .l” ,asic _:_ _~;~i _:_ :‘.,?. _ _ . “ ‘.‘.;.:~:‘. I :‘;..I; .’ ,1-l
_zx~_~ . . iij.~.;ii~.i~i__i .__...-.. :.:.; _...: ..__.__._ l-1
SPECIFICATIONS.. . . t. _ _~.~.-... . . . . . _. . . . . ._. . _. , l-1
INSPECTION ._._........_... ;.._....,.. _.._ . . . ._................... _ . . . . . .~..;.;:~..:~z::::.. l-2
USING THE MODEL 199 MANUAL .~~.~~.~.- _.r.._. . . . . . . . . ___. -~...._I. .: . . --. . -_ . .,. . i . . i l-2
GETTING STARTED .‘:~.~. _:. <,-I.._a. _. i .~. . _~._. _ .,._~_,__j .,. . . . . i.. , i.. .,,_, I,_.,_~i : l-2
ACCESSORIES . . . ___.__._ _)_r,1513~1--11111111~1*.“,_..,i I ,i#i,:. _~Lz”1_: :. . .,. __. . . ~. .I . l-2_
2.1
2.2
2.2.1
2.22
2.2.3
2.3
23.1
2.3.2
2.3.3
2.3.4
2.3.5
2.3.6
2.3.7
2.4
2.4.1
2.4.2
24.3
2.4.4
2.5
2.6~
2.6.1
2.6.2
2.43
2.6.4
2.6.5
2.6.6
2.6.7
2.68
2.6.9
2.6.10
2.6.11
2.7
2.7.1
2.7.2
SECTION 2-Basic DMM Operation
INTRODUCTION .......... I. ......... ,A_..-ia..,u..,, ...... .‘. ................... .: .. 1. .:.~. ...... ~;~.; 2-l
POWER UF PROCEDURE ............ ^
....................................................... .; ....... 2-l
LinePower ..................... ._ ........ i.~. ... :...~;...i ...... rr;:. ............. . “.*.~.;...~.;.;.;: 2-l
PowerUpSequence .......... .~.,..~...~.,; ... .... _..... . ___I____. .._- .................. ;.~;.~.:::;~ ..... 2-l
Default Conditions .............. __...... .~.-...~.~..,~..‘.~.,, .,,&,.~~.i .... ‘: L’.... I. ..... I ........... .,...... 2-l
FRONT PANEL FAMILIARIZAXTON ................................................ ..i. 2... ___~________ ... 23
Display and Indicators .............. _,-_-l __..--........................... : ...................... 2-3
Power Switch ............. ..___ ...... __,_.i_.~ _____’.__.. ....................................... :__ 2-4
Controls ................. ._.,_ .., ....... ,_.=_lsIx “,,_irl_ .....v.r j __._;_ ........................ .__. .. .,.. .:~.~.. ____, 2-4
CAL LOCK Switch ................... ..... j_~i~~~w~~iJ...... Ibjl ; ..:;~;~.. ..~_ . .~-,; _I~ ..l’l.:~:~.. ‘.‘.‘.‘:: . ..::“. . :::: 2-5
INPUTSwitch.. ...................... _. .......... ~.._~..l .................. +.-~...- .: ____.: ........ .,2-5 I,
CutintInjxtFuse.. ............................... i_.~,__~_:~>. :~~..... .......... i~__~.. .._ ......... 2-5
Input Ten&naIs . . ..___.__..._.._ A_,i_i_i___ ___...._..._... ~.i,..., a.. . .._.~..._._. j ._~__..___ a,__._. 2-5
REARPANELFAMILIARIZQION ._._.I ~__.~_____~_.... ~_~. . .._.... . ..ii ._._. _.,..,, - .____.___ L._.._. 2-5
Connectors and Terminals . ^t . _. ..___. I___,.__ i .~..,i . ,.. : , i,.,I . _ _ . . ~.‘;___ _ _) j __ 2-6
Line Voltage Aspects . . __, a,\._...,+ >.._....___. . . . :. . .__. _. __ _. _____ ___. _. 2-6
IEEE-488 Connector ____~. .~._r_. . I~.. _ _s. _. ~. __~_.__.i. . i _.‘,.iii,. ,_. . . 2:. _,_,.. ~ .‘. _~i_. 2-6
Scanner Card Slot. _~_ t .._~1 _~__I;.~_. . ,~i __ ,,.iv,i,:v: _,_,.L<.i’:t _ _ _iri r.t*‘.. . _“. .‘: _. 2-6
DISPLAY MESSAGES . _______.:. . _,_,__..,_,_f_. . ... I.,..:a,c_. _. .~.. . . .,. ________. . . 2-6
BASICMEAS-iJREMENTS .__...__._..._: _.__I _.._..____... :..I _..._..._^ ~____...___ __.____I . . . ..I____ 2-7
WarmUpperiod .._..__ __~___._, j ..,._~_.~.._,e,L_..._,.. *a.~._._. - ..__ ~‘,..~~-.~-~. . ~..:~;;;..~...;~. _____ 2-7
Zero . . . . .._ __...______ _.__i_._:iil.jv/i ,.__.: ____ _....___ ;.;.‘.:r;~..r.=...“~-.‘....:.~.i ._____ ~.:.:~;:~:;‘..‘2-7
FiIterandResolution .._.. __.r____-_ _______.. ___._..._..._ _,..~._..._ ___.... __~______._______.... 2-9~
DC Voltage Measurements _~. . . . ._ .__~______ I_~.“..__. ~ji~~ii._ j..L,l.~iii_.. ___ _. i.,L-.‘l. _. . :.. 2-10
Low-Level Measurement Considerations _ _. _ . . . . .~.. . _ _ . .._. I . _ . _ _,._ 2-10
Resistance Measurements _ . . . . ___. _ . _. . _ _,__i .,. . . . . . _____. . _ . 2-11
TRMS AC Voltage Measurements . . _~. . . . _ . . . . _. . .,. _.A-_‘. _. . .~__ _~. ~2-12
Current Measurements (DC OTTRMS AC) :. .,_. ___. _. . _ . __- ___..______. . . 2-I2
dBMeasurements .._._...____ I.~__._._ ____. _.“_+, ,.L...._____ c_.j __... in..__ ;__l~__.____~....__,____ 2-13
TRMSConsiderations . .._......__._ t_~_..._..__,._..__...._. r.-...~..i ___...... ,I______.__; ._._ ~ 2-14
dB Applications . .~.. . __. . . .,__ __,_. . . . . __. _. __~_~_~._-__ __ . _._ ______. . .~__,__~.. .~_ . ,. . 2-16
DMM SETUp PROGRAMS _ . ,_.~1l~=I~~f~.__ _. . _.:.I. _. i. .~..~>_____. _. . _: :~.. ;. _ . . _~._ _; 2-16
SoftwareRevisionLeveI ._...._.___ __._~ _._,____ I,__......_._._.... i_i,.i ._...... 1 .__...____._ :.. 2-17
Multiplexer, AutoZeroiCal ..______ ~..~._____~__.._._.. ___.._ L.__- L...~ _,.,_,.,. . ..__ i ___. ~...~_..____. 2-17
i
1.7.3
!.7.4
!.%5
!.7.6
!.7.7
L.7.8
2.8
2.8.1
2.8.2
2.8.3
2.8.4
2.8.5
2.9
2.9.1
2.9.2
2.10
2.10.1
2.102
2.10.3
2.11
2.11.1
2.11.2
2.113
2.11.4
2X.5
2.11.6
2.11.7
2X.8
2.11.9
2.11.10
2.11.11
2.xi2
2.ll.13~
2.11.14
2.11.15
2.X16
IEEE-488 Primary Address Programming. ............................................... ..... ._ . .. 2-17
LineFrequency.. ....... ~:.: . ..< .......... ,_,......... . ............. ;-... z=......... ;..:.r-x.;; ...... ;;.,~2-18
save Setup ................ ._~_.... ... ._~_,........ _~.. _. . * .~._“_.~..,..^..... i,_>.,. ,.___ ... I,. . .i#i . -,. _‘,,.li 2-18
LEDTest ............................... i__~__.,-.I_ .. .._.~..z.< .,r_.,d.,......... i~.J<.i __ . ..!. ..... ;...;L..,2-19
Debug.. ............................... .._..._~ ___.___.__, . .,._~..r..~...; ...... i ..... .;.....;..ii. .A___ .a-19
Reset.. ....................... I .... L........... i.~. ... r- ___.; .... -~+ . ..<.........
FRONT PANELTRIGGERING ..‘.~:~..:......~.-.t..~..~.....~~~.~;,., :l-.‘;.~-~: ____ :..,% l9
. * -8,; -,A1_rj ,>,,>,,i. _......... 2%::;~_IL.,.,. ,.‘. : J-!.‘&-lg
Trigger Mode Selection .............. _,__,,L,.,___,,_.,.......... --. .............. ._................... _j~:__2-19
TriggeT Sources ....... : ........ .,_~...... .~:. .; ......... __~_,..... _................ __........... 2-20
,Trigger Delay ................... :_
. e‘v, ,‘:~:,‘:*~‘s~:~,“‘.~:u.)
.....i,._ ,_..~.LI’::.z
...1:‘.u~/
...i .... ‘.,
...... .zz.:‘,.i_ :I :‘Y,
... “2-20
Reading Interval ......... .,...... _f __.. _._,_ ..i. ..... _.,i_,,i.. _. _,. .,,... I,i,-,I,,;. ,_,_,,.w_; .. ,_ 7: .I. :‘.I ,I.. .‘. ... 2-20
Trigger Programming Examples ....... I. .................. .~j.r.. . .. &.;_ : .., ii ... >~.,;. ~..i.;~~~-.~..; ._,_,11,2-21
EXTERNAL TRIGGERING. ..... ~__~.~.~t~__~_.___ _~.... ~.~~/~.... ....... ....... ;..i.:..‘..~_~.i.~i. ‘2-U
External Trigger. ................. __.. .~.:.,I:.:,.~. _: ‘.l.~l...‘.
.... ................ , ............... i ...... i.................
Meter Complete ..................... ~____iY_~.iii.i_j~i~i_~i~_~__~jj_~iii~~~:I~_~~._.L~i_~
.... I,.--.~-~,~:-~r,.‘.:.l,~r.,2-22
D.QA STORE .................... __.... _ii_ ..,Ii <,w,tis.i,.:..... : _..... >i .+.i p.~i.......... .i :_ ... ,A.. .,.,.. 2-22
StoringDataatProgrammedIntervals ......... ~.~..~rl._~_......... ~~...i~.__~. ..... ,.t_.-i.,:i:,.,_,j....i .l 2-22
Triggeri?g One-s&t Readings into Data Store _~_~_,.t. _,_. __‘,....,‘-...~ -. ....... Z-3
Recalling Data ..........................
.................... .,........ _,.............. __..
SCz4NNE.R OPERATION (WITH OrrION 1942)’ :~;. : : .... 1 .,..,.... _........... ._ . _: _,_....... 2-23
.. .... _.. 11 _~_... i .... i ,>.>_,/u,./j,/. j ..,.. ,>. i_:.. ,224
ScannerConnections...~ ............................. _~.. .._...._. ~_~~........... _._ .............. b,d.,2-24
Scanner Display Format ....... ^~_.......... .,.. _, ., . ; .,,_... j : .. :‘. I :,.‘~..:.~‘.‘.:I .... _,_.. :I’.‘,..:.:. ..,.. _;;_ ..2-30
Pole Mode Programming. ............ .,.,__~,IL.~.I-z,~~ .,.... ..~jli,Y~j,_lY,....~.... i CL/,i :_ -~-,-.‘~:.‘.Y::~.‘.‘:. :X 2-30
RatioMode.. ............. ................~ ....... _,I.II,_., . -I .,..., ;_.,._~ ........ . .................. :.;2-30
Reading Interval ..................................... .~L........ ,_,,._ .............. .___I.: ..... ~_:____~._ 2-30
Scan Limit .................... I .. j ... ,_izii;.,. .pYYi..rpz,,..... _. 1. ‘~r~.:.:;:.r::.:_‘:1’.i :.. I I . L:‘:‘.‘.:L.... ‘_?~I‘1:,,2-31
Manual Channel Mode.. ........ .._. ~__~........................... i .... L:~...... :_~_,_~.... ....... 2-31
Step Mode Operation .......... I ......... ...~.ii. ... .._. ....................... ;_ . _.- _: ..‘: ... i .. 2-32
Sane’ Mode Operation .......... ., ........ _,l.il_,_ _,-.__. I.... _i,.~-__, . _.-~.i_,L1._,j,i,_,__~.~_.... i_ _,:>.‘.:.... 2: . 2-33
Using Data Store with the Scanner.. .......... ................. I~__L.... A~_...... ~..I..j..,I..i,...ij. ,2-34
A Practical Scanner Application: Amplifier Testing .......... __.... .~-__.......... __
....... _. ._ .. 235
Lw+level Measurement Considerations ............. _..... , ................. ,*,,................... 2-37
Using the Scanner with Other Instrumentation ............. .,_. _................................ .,. 2-37
Scanner Delay.. ......................................................... ~__*..................... 2-38
Using Filtering with the Scam-w ....................... ,......... ii~ .... i .. ‘. _,..; .~..,..... ;-_._,__....... :;,:.2-38
Minimum Scan Interval Ties. ... ,._.__.” ... ._.. ‘,.__., i.,il_ ,., i‘~“~_~~~”___,1L.-‘,--,-IL.,i,~~~~..~~:..,...111’--.-2~.
SECTION 3-IEEE-488 Programming
3.1 INTRODUCTION ............... .._ .......... L,l_ii_i ............ :_:__/ ..__...__._ ..... :i..:..:.e..;-.r. 3-l
3.2 A SHORTCUT TO IEEE-488 OPERATION. ........... _.......... _,I.,_......e..u...,_<.....A... _._..L.....~ ... >~.‘:z.... 3-l
3.3 BUSCO~NNECTIONS ............................... .............................. ___., ......... 3-4
3.4 INTERFACEFUNCTIONCODES ......... ___I__._ ..... .. _.... ~v.__.~
...... ~._.~,~___._.r ..... . . . ........ ..~3- 5
3.5 PRIMARY ADDRESS SELECTION ....... _................... _.,_. _... __... 1,_,_.................. ., 3-6
3.6 CONTROLLERPROGRAh4MING.. ....... ~.I.~.~____
................................ ... _._,____(_ . .__, 3-6
3.61 CotitroIIer Handler Software ........ .., ............................................. ..~_~_~._~._
.... - ... 3-7
3.6.2 ... BASIC Interface Programming Statements ............................... __.. _.... .__ ......... _._ 31
3.7 FRONT PANEL ASPECTS OF IEEE-488 OPERATION. ..................................... -. ...... 3-7
3.7.1 FrontPanelEnorMessages .......................................................... i...~ ......... ~3-7
3.7.2 IEEE-488 REMOTE Indicator and LOCAL Key .................................................. 3-9
3.8 GENERAL BUS COMMAND PROGRAMMING .................. _,i,. ................... -. ....... 3-10
3.8.1 REN(RemoteEnabIe) ............... _,.......................................................... 3~10
3.8.2 IFC (InterfaceClear) .................. . ........... ____ _______,_,___ .............. _&_~
........ _,._,i,..... . 3-10
3.8.3 LLO (Local Lockout) ...................... i .............. _.... .,. _............................. 3-11
3.8.4 GTL(GoToLxaI) .......................... ._,,__,1.~_,_______: ...... pi............... ;.:A.-.~. ..... 3-11
3.8.5 DCL (Device Clear) .................. ..c ... , . ._,..... -__ _,__
. ______ .............................. 3-11
ii
3.8.6
3.8.7
3.88
3.9
3.9.1
3.92
3.9.3
3.9.4
3.9.5
3.%6
3.9.7
3.9.8
3.9.9
3.9.10
29.11
3.922
3.9.u
3.9.14
3.9.15
3.9.16
3.9.17
3.9.18
3.9.19
3.9.20
3.9.21
3.10
3.10.1
3.10.2
3.10.3
110.4
3.10.5
3.10.6
3.10.7
3.10.8
3.10.9
3.11
3.12
3x.1
3.12.2
3.12.3
3.12.4
3.12.5
3.12.6
SDC (Selective Device Clear) ........... _ _....... : ........... _,
.. _,_
................... : ..... _... _.. 3-12
GET (Group Execute Trigger) ................................. _.. _. ............ _. .......... , ... 3-12
SerialPoJIiig(SPE,SPD) ...................... .._. ______ I .._._.._ ... _._._.._ ........... _ .._ _... ~..__. 3-W
DEVICE-DEPENDE&T COMMAND PROGRAMMING .................... ._ ...................... 3-13
Exe&e(X) ........................... ::...: .... ..................,_____ _. ........................ 3-16
Fumtion (F). ..... ..~_.._ ...... I..._ ... ~___
..................................... .._ ..__.......... 3-16
Range(R). .................. ~..~_-.~...~_ .... _................................................ 3-16 ~‘~
~~1
Zero(Z) .............................. ~_............... __~:~<
................................ :?_ ... 3-17
,,,,
Filter (I’). ................... ._~__.~_ ._~.~..~_...._._. ....... _............................. , ............ 3-17
Rate (S) ..................... ..; ~,_,-
....... .
.._._ .._ I._.~ .. .~..~~_.
........... ................... _
....... 3-J.8
TriggerMode(T ............................. .._. r.. ,__^_ _.__________.__ _______,,__ _____._____ 3-18
Reading Mode (B) ................................ _... __ _... _ _... ____ ...... .,...... __. ...... 3-19
Data Store Interval(Q) and Size (I) ............ .._..._ _:. ... ........................... ~..~...: ... 3-19
Value (V) and Calibration (C) ................................. _........................ _
.. : ; .... 3-20
DefaultC&ditions(L). ................................... _._. ........ -. ....... _.l.. ... -...~ ... 3-21
Data Format (G) ..... , ...................................... ^_..................................... 3-21
SRQ Mask (M) and Serial Poll Byte Format _............................. _. ................ _....... 3-22
EOI and Bus Hold-off Modes (K) .............................................. , .............. 3-24
Terminator (Y) ................................ _,_
. _..... _.............. __._
............... __,L_,_,_
.. 3-25
Status(U). ......................... ~_~___..................................................... _ .3-25
Auto/Cal Multiplex (A) .......................... _:
........... _. __. .. __...._.._
.. __ ..... _~_
. __._,_
.... .,. 3-28
Trigger Delay (W) .......................................... ~_.
.................................. 3-28
Self-Test(J) .................................. .
... .._ ................... _~.
........ .._.. _. .... . ... _. 3-29 ......
Hit Button (H) ............................................ ,_
... _. ................ .___ ......... _., 3-29
Display(D). ................................................... _.............. _. ............ >. .... _.. 3-30
TRANSLATORSOFTWARE ......... ._______ _.~
......................... . ................... ::...;~3-3 0
Translatoe Format ................ _~.
........ ..__. .................................. _. ........... 3-31
Wild Card ($) .................................. ________.______._______,_ _,_______._____._______ 3-32
NEW and OLD ................................. _...... ..:. .. .: .................................. 3-33
CombiningTranslator Words ......................................... __~
....... __. ............... 3-33 ...
Combining Translator Words With Keithley IEEE-488 Comniarids ...................... , ......... 3-34
Executing Translator Words a& Keithley IEEE Commands .......... _~.......................... 3-34
SAVE ....................... ..____ .... :..-:...,.e~, _._____ ___I_.~~..-._--..-.-.----- ............ 3-34
LIST.. .................... _. ............ _._._~ ........ -.... .._ ............................. *? ... 3-34~.
FORGET .................... ~;..~
... .._ ........ ~..~.w..:..: .._.__._._. __. ... __.._......._...___ ____._.. 3-35
BUS DATA TRANSMISSION TIMES ... ,__,_rT_. _~_~__I__.. .,.._. _. . __. .z._ ......... _........ __- .,_,_,_._m
.. _. _ 335~
SCANNER PROGRAMMING : ................ __~__.. __~_.__........................... .~_. :. ..... _ 3-35
Scanner Setup (N) .......................................... _............ ._ . __
....... ______. ._ _. 3-38
Pole/Ratio Mode (0). ......................... _~.
.................. _~.
... _. ...... _. _,T_i__. __~.i_. ..... 3-39
Reading Interval and Delay Programming ............... .,............................... __~____ 3-39
Using Data Store with the Scanner .............................................. ._ ........... 3-40
Testing Resistors ............................. _.. _. _... ____........... .,...... _“. . _. .......... 3-41
Amplifier Gain Testing ..... _~~;:, ............................................................. :_ 3-44
SECTION 4-Performance Verification
4.1 INTRODUCTION ............... ............................................................... 4-1
4.2 ENVIRONMENTAL CONDITIONS ..... _
.......... __..... _.~__. .... __.. _.......................... 4-l
4.3 INITIALCONDITIONS ....................... .1._ ......... _~
.... _,
... I~...J _. ... _. ................ .._. ..... 4-l
4.4 RECOMMENDED TEST EQUIPMENT ........ : ...... : ......................... .,..... _,
........... 4-1
4.5 VERIFICATION PROCEDURES ................................................................... 4-2
4.5.1 DC Volts Verification ............................................................. , ............ 4-2
4.5.2 TRMS AC Volts Verifications ........... .‘.~_
...................................................... 4-2
4.5.3 Ohms Verification .............................. _~_~___
.. .,.,_..................................... 4-3
4.5.4 DC Current Verification, ............... _. ....................................... ._ ............... 4-4
4.55 TRMS AC Current Verification ............................................ _,_
............ .,... _.,_. 4-5
u1
SECTION 5-Principles of Operation
5.1 INTRODUCTION . . . .._......__._ >.,i_<~r...~ ___r..... 1,__. . . . . . . . . . . . ..____._..~...... a,>_,,y__,.;:i~;l,:~;~i~5.1
5.2 OVERALLFUNCTIONALDESCRII’TION ___......_....._... _.I-., _,_.._.__.__ .__.._. _.___.. I,_.~.._.,. 5.1
5.3 ANALOG CIRCUITRY.. . _. ..__I __-_ __~_~A__~_I_.. _. __..,. ii,_,..~_ _ z _. . :.‘I-. _. _ .~.,._. 5-l
5.3-l InputSignalConditioning .._.. .._._. _~_I,._._ 1. . . . . .~,I ..-.-. i_i~ . . . . . i _.._ ;.)I’..;~.:.’ _.._ i_i_. 5-1
5.32 Multiplexer . ~5-6
5.3.3 -28V Reference Source . ~. . ~. : .~.: ;.::~.. . . . _.,-._ /. . . . iii _........__ r.‘.;. ______^___ ~_iii_~ ____ ~5.8
513.4~~~ InputBufferAmplifier . . . . . . !.~.I ..____..... _..,.......... 2. . . . . . . . i . . . . . ..__....____ ~_i.,_,.. 5-8
5.4 A/D CONVERTER .._.....,_. __._,_,_._~_.~._._~______~..,__~.......___....._.___. ..__ ____ ____ i...:.....1=~~5-8
5.5 ~~~:CONTROLCIRCUITRY ~.~.~.,.<..;z .__....__. >,...-,.... i.i..~...~._ . . . . . . . . . . :..:..i~ . .._.... ‘1. 5-10
5.6 : DIGITALCIRCUITRY .__.____tt__ ::w..~.-. _____,_.:___,_._,_..______,_ ~.~_.~______L._t____...; ____._,,. ;v_._ 5-10
5.6.1 Microcomputer . . . .._.._.._..____... ~_~i__,ij .,_. Ijj,__,,j’. . . . . . . . . .l_-~._..;_;..: . . . . . . . . z..:;..;..;... 5-10
5.6.2 Display Circuitry . ; _ _ -1-i,“..,I . ...._.____,__ , . . :-.: .;~.-- _. .~_~_j~l~_l,;. .~_.‘+z.. .:: :. . . .,. &lO
5.7 POWERSUI’I’LIES _.,__..; .__.__ :..~:.. ._...___ __.. I).~.._._._ -~.~.-..I...:..;..~ __._.I :._.i _,,.._.__ ~5-IC
5.8 SCANNER . . . . . . . . . .._.._.....~..... ~,_______. _...,. L. . .._.-__I_.._, _.I._..._.... 2 .._...._..__..... 5-10
58.1 c0ntr01cicnilTy . . . . . . . . . ..___. _... -.~..~~-;.~.~-~~,~...~,........ ~_.~.i~....___.....____.. ..,_ _. . . . . . . . 5-10
5.8.2 Switching Relays . . . . I. _. _a~.~..z:__.i,. i.i. ._ _. _.i.~:; . i: . . . . I._. _ ) ;~:.~xr:~.. _. . S-11
SECTION 6-Maintenance
6.1 INTRODUCTION ................ .t......_ ... __.,i ,a,_:i..>.: ..i.:.;; .. _‘i.... ._I’., ..:.... L.‘:.-,:,-:-~ ....... 6-l
6.2 LINEVOLTAGESELECTION ............. ..I: ... ............. ._............. i;. .,_,_,-.----T.i~...-..L~~ ..- 6-1
6.3 FUSEREPLACEMENT .......... ~.,.-.; ._ 1.; ..... ;...:.~..:..A:.1 ............ l,i~irl_ii_,i,i.~.ii_._‘_1. .... ~61
6.3.1 LineFuse ....................... ...-L......i.~~..............~:~~~: ..... ;~_; .,._ ...... ..~~....~..~..11.... ........... 6-1
6.3.2 Current FUse ..................... L....................... .._ ..i ._.__ f.. ... _............... _i ....... 6-2
6.4 CALIBRATION ............. _^__.. .~.I;~._.~
........ _.__......... ;: : ........... I..:. ....... c. -.-:.‘:a;.... 1~:.... 6-2
6.4.1 Recommended Calibration Equipment ........... ;. : ... __........ . ........ _,.;,___........................ 6-2
6.4.2 Environmental Conditions ... : . .~; :~.~:::~I. .. ._ _ .~i,l.Lj.l. ._ ...................... ; :. ; __: ....... : ...... :~6-3
6.4.3 .. Warm-UpPeriod.. ...................... :_ili.. .. ~.i. ... . ................................ .: ............. 6-3
6.4.4 CAL Lock Switch .............. ,.,__,_L.,_... _yy_~I_jmj.i.... i .. j i~i..* :.. _....~..~.L~...~.... i ..__-‘: ;.r: .z: : . : . ; ..... 6-3
6.4.5 Front Panel Calibration ............ ...._: ......... . . ... ...... . .. ::. ..... I .............................. 6-3
6.4.6 IEEE-488 Bus Calibration ........................... . ............... :. .. .~.+;.. .... .*. ............ 6-4
6.41 Calibration Sequence ..................... ._ ................. _. ..... .,,_,,.... _
.., _._.. _,_ .; L__: .. ‘L#,,.,jl,6-5
6.4.8 DCVoltsCalibration.. ........................ _. .._ ..... ,__L.__~. ..... ..~.....‘....‘~~~.i.‘.~.......‘.:.’.:’.~..l. 6-5
6.4.9 Resistance C&&ration .................... _............ .pi.~ii. .. i:. ...................... ., _:_...... _~;
. ; 6-6
6.4.10 TRMSACVoltsCalibration ...... ........ L.... l.. ................ ....t...ii ..__ _. ..;: ....... _....... _2, 6-8
6.& DCC unrent Calibration ......... ~.,~“~.-~ ........ . .................. __,_._______ ..... .:..~........... 6-12
6.5. TRMS AC Current Calibration ........... _.............. i _.__ .._._._,.,_.. _~.,:
......... .,_...... ..; .... 1’: 6-12
DISASSEMBLY INSTRUCTIONS.. ............................. +........... ................... L.. .. ~...6- I3
6.6 SPECIAL HANDLING ............................ __._ ......... ~.~..6-17.
6.7 TROUBLESHOOTING ................ .~:~I
....... ._I,, _.... ._,___._i~_.i_. .... ..i .... L
... ii :..::z:.: ............. I 6-v
67.1 Recommended Test Equipment .................. ,_.,_............ Il~_~_~.~i
..... i_ ..... i .... _‘*._ _‘wr~_:_~6-17
6.7.2 .. I’owerUpSeIfTest ............. _.._. _._--,.L~.i.~~__~~i,.~ .... ..^ ._ i ........ ;..e_ .._._; _...... ~;.;....~6- 17
6.7.3 Diagnostics ............ .._.__ ..................... _. ... ..___ _i.__._-__.iz~ . ..__ .. -..;..~.:.~..:. 6-l8
6.%4 PowerStipplies.. .................... _.____.^ .~.........._. .: .__, L___ .... __I ..... .._ ............ 6-18
6.7.5 Signal Conditioning Checks ............ __....... ..-....
~=.;...... _............................ ..L. _._
........... 6-18
6.76 DigitalandDisplayCircuitryChecks.. ..... _._ .... ji,. ............................. . ___._._.__._ 6-18
6.7.7 Scanner Checks.. .............. .~...~__.____..... ____., i _._____w,i_~/.
................ .___.__ ii._i,_i_i 6-18
6.8 ~SCANNERINSTALLATIONANDCHECKOUT. ........ _..i.....l.i.....l.._i_ i ..... .._. izi,.__ ...... .._ .. 6-22
6.8.1 Installation .......................... _............ .___ ,i .......... .._. ..... ;.: ._. ...... .;- ........... 6-22
6.8.2 Card Checkout ..................................................... _._&.................. i ......... 6-23
6.8.3 Relay Shield Jumper .................. . ............ _. ............ _,_...... .__ ___ . _._. ........ ; .... 6-24
iv
SECTION 7-Replaceable Parts
7.1.
7.2
7.3
7.4
7.5
INTRODUCTION .......................... l,_....... ..1~.
.... : .,. .,L.IIII~,.~.
....... .,.~...... ,.“i_I:,,.1 i _.,_.ii i:i _~_;~7-1
PARTS LIST ................... ~.~.~...:~..~:
..... ,,--..-.-. .:. ........ _.-._.---- .. ......... .._,“. ... . “....~L .. 7-l
ORDERING INFORMATION .......................................................................... 7-1
FACTORY SERVICE ................................. _ ................................. ..I, ................. 7-1
SCHEMATIC DIAGRAMS AND COMPONENT LOCATION ~DRKWINGS .... : .............. ;. ...... 7-1
APPENDIX A
ASCII CHARACTER CODES AND TEEE-188~MULTILINE INTERFACE COMMAND MESSAGES _. . A-l
APPENDIX B
CONTROLLER PROGRAMS _~. ~._. . . . . _. _. t . . . . . _____ _____,. L . _,_ B-l
APPENDIX C
IEEE-488 BUS OVERVIEW :. : .:: :: ,..: .‘. : :. r . . . . . . . _. . _~.__, . : C-l
List Of Illustrations
SECTION 2-Basic DMM Operation
2-l
2-2
2-3
2-4
2-5
2-6
2-7
2-8
2-9
2-10
2-u
2-12
2-13
2-14
2-15
2-16
2-w
Model 199 Front Panel. ........................................................................... 2-3
Model 199 Rear Panel ........................................................ ,~___ ................. 2-s
DCVoltageMeasurements ................... _................. _
... . ............... _ _,__~__... .._ .._ 2-10
Two-Terminal Resistance Measurements. ................................................ _....... _. 2-11
Four-Terminal Resistance Measurements .......................................................... 2-11
TRh4S AC Voltage Measurement ......................................................... . ........ 2-12
Current Measurements.. ....................................................................... 2.12
External Trigger Pulse Specifications ............................................. _
.. , ............. 2-21
Meter Complete Pulse SpecifZations. .... (. ................................................... _,_,,., Z-22
Scanner Connections .................... : ................................ __
......... __~_.~._.~_.__- _~__,2-24
Output Cable Connections ........................................................ ..~..~.~_,..... _.... 2-26
Voltage Test Connections ; ............ .I. .................................... _:: _~:L_
..... ..L. L.~.~
...... 2-27
2-l’& Resistor Test Connections ............ : ................. : ................ L .. _~______ ________. _ 2-28
4-P&? Resistor Test Connections. ....... .Lz ............. :. ................................. ____.. ..:-..2-2 9
Amplifier Gain Test Configuration. ............................................... L_
... L.; ........ 2-35
Amplifier Frequency Response Test Configuration .................................... __......... 2-36
Using Scanner Card with Nanovoltmeter ............................................................ 2-39
SECTION 3-IEEE-488 Programming
3-l Typical Program Flow Chart _. .~.~.. .~_..~. . .~. . __. _ _____ 3-2
3-2 IEEE-488 Connector _ :Y:.: .~. ._ . .~. . _ : 3-4
3-3 IEEE-488 Connections . . . . . . . . . _ . . . _. . .~. _. .~_.~_~___- _ _. _. . __ 3-4
3-4 IEEE-488 Connector Location. .~.. . .~.. _. . . ,. . .~. . . _. _. . _. . 3-5
3-5 ContactAssignments _____._._r.~.__...~ _.._ _.__ _I______ ~_.__. _. . . . . . ^_.... I._ .___. _L_________..,___. 3-5
3-6 General Dat Format . . . _ . . . . . . . . t _ .._ 3-22
37 SRQ Mask and Serial Poll Byte Format .~. :_ . ~ _. _. . . 3-23
3-8 UO Machine Status Word and Default Values . ..__. . .,.... ~..~ .,.,.. . . . . ... . . . __________ ~-~3-26
3-9 UlErrorStatusWord . . . . ..___......_._........... ^ . .._... ^_I..~ . . . . . . . _._____ ____..___.. ~,_-I_ 3-27
3-10 2-l’& Resistor Test Connections : . . .~. .~; : .~.. .~. .~.. : . ; .~. 1_.~~.
3-42
3-n 4-P& Resistor test Connections .+; .;. _ ., . . . 3-43
3-12 Amplifier Gain Test Configurations I 1’:. _~_ 1. .‘. __‘. ._~..‘I 1. 1.‘. 1_I _ 1.. _‘_. __,_,1. ___‘_ 346
SECTION 4-Performance Verification
4-l Connections for DC VoltsVerification . . . . . . . . . ..___ I __________.___._._ 1_____ _..___-._ ~_~._.,_ ~...~4-2
4-2 Connections for TRMS AC Volts Verification.. :‘. :. , . _. . I~. . . . .~. . . ___. 4-3
4-3 Connectionsfor Ohms Verification (300%3Ok0 Range). . . . 4-4
44 Connectionsfor Ohms Verification (300kil-3OOM0 Ranges) . .~..~. . 4-4
4-5 Connections for DC Current Verification _ . _ . . _. . . , 4-5
4-6 Connections for TRMS AC Current Verification .~. . . 4-5
vii
SECTION t&-Principles of Operation
5-l &&all Block Diagram . ___. ~.,,-__.._.~~II___._:*,.I;-.,. _ . :. . . . *.. ., .,_<:I,i i _ . . i:. . . . __. _; :; 5-2
5-2 Input Configurati& During 2 and 4-terminal Resistance~Measurement, . _ _... . __. ____. I _ . . . _. S-4
5-3 ~: ResistanceMeasurementSimplIfiedCircuitry _....._, __.__....__..... Lji,.i__.j .___. ii:....i~rl.‘.l’,~;. 5-5
5-4 JFET MuliipIexer . . . . . . _. . . __,_,__,___,__ . . . . .~.~.. _. _. __,_<.<,,I*.~_2. __i,,. .’ .:;: i ii i‘2%: :‘i:~. 5-6
5-5 MultiplexerPhases _........._,._ _,.__. ___~_~.~~,ll~.~.__~I.._..___._. j _...._ \~..>. . . . . . . ..____. . . . . . . . .~.. 5-7
5-6 A/D Conveitei Simplified Schematic. _ . . . . ___. . . _ . . . _. . . ,. __;. . . _~~.,,I . , . __ 5-9
SECTION 6-Maintenance
t-i DCVoltsCalibrationConfiguration(3CQmV~nge) __..____..._ ‘I.... ,.=. . . ...1.-.* __,. L_i.l~i.___ -.~.;....6-6~
DC Volts Calibration Cbnfiguratioti (3V-300V Ranges) ,.,. . . . . _. _. . ...._..,,_..__,__. . __. __,. __ . i i _ 6-6
6-3 ~~ Four-wire Resistance Calibration Configuration (300%3OkQ Ranges) . . . _ .~.. __ .~. __ 6-7
6-4 Two-Wire Resistance Calibration Configuration (300kQ-300MQ Ranges). . . . . . _. __I _. . _: 6-7
6-5 Flowchart of AC Volts Calibration Procedure . _. . . , . _I_ _ . . _. _ . . ,._..,..”_. . _. . . . . 6-10
6-6 TRMS AC Volts Call&ration Configuration . ~__ , _. _,__. __..,_,,I,. ____,_ i .,,._,,.: . .i . . .,...‘. Y. : I .’ 6-10
6-7
6-B TRMS AC Volts High Frequency Calibration, &ljustments (30V and 3OOv,Ranges) . . . _. . . . 6-11
DCCurrentCalibrationConfiguration..’.. ..__ _..._.___...___.._ *.___ ___....___.._.._...._ -..--;_.:. 6-12
6-9 ~~ACCur?entCalibrationConfiguration .._... ___.._ ________,..__ _.l~l_____i_~__.l_~._.;~.j~~_.j~.yl~..j_ ._... 6-13
6-10 Model 199 Exploded View . . _. . . . ~.. ._.______._, . __. ._~_ _. , I . . i. _;. . _ . . _ . 6-15
6-n Connector Locations.. . . . . . ..~. ...__.i,. e,m..i..,.._. ..~.__. . _.. . ._... . ..~. . . . .~*..i.. . . . .~_. 6-16
6-12 Scanner Installation . . . . _=_..I.DI,i._m.v~_,,L,Y,18.=..I L Z:. :‘_‘.i~i_;‘:‘YYI: ,:‘.; :. . zi I; .‘:. I’:‘: .., :“.‘.r.1”.:6-24
6-13 Scanner ConneCtor Location __YL.. _ ij ._ . _ .~(__ _. ___. . , _~.~*.=__.z~.______&. ;~.. ._.. __. :. 6-25
SECTION 7-Replaceable parts
APPENDIX C-IEEE-488 BUS OVERVIEW
C-l IEEEBusCoiifiguration .._..... :..L ._._I, .~*..,.~...: ___.__._ ~..; .__..__.__.________._ ~-~.-,.~~-~.,I~;~-I.C~l
c-2 IEEE Handshake Sequence __ ~~~. : ;. ___ ___,_,;-.LLu,.,. ,_/,_~..I_,+ ,,_,.G..__. i i _,: .~...?.__,. _~:‘-. _:I C-3
c-3 Command Codes. L. L. _. . __ _~i~.. i_ _. i .~,,A .“L‘P,:::_ii___ , _~j_,.~.. ‘r. ;‘. :‘-:: :“. _;.‘;.. . .,. <_,;.‘~A_. C-6
List Of Tables
SECTION 2-Basic DMM Operation
2-l Factory Default Conditions. .~.1 , _~. . _. ___. __:-_ __ ___.,___._ _. ______., _. 2-2
2-2 Error Messages _: .z.. _ . __ _ , ..* _. . .,. . __ _. 2-6
2-3 Resistance Ranges .~_ _~. ~., _~~,~_,.~.. .~_. . . . ~_. . _ . . . . . _. . __ _ _. 2-11
2-4 Corresponding Voltage Reference Levels for Impedance References.. . ,~._~. _,. . _. ______ _~.__.~2-14
2-5 Comparison of Average and TRMS Meter Readings _ _. _, ..._........ . _. ____. 2-15
2-6 DMM Setup Programs _ _ _ . . . _. __ _ . ,~. . .~,r ;. _. . _.~. .~ _ .~_ 2-16
2-7 Typical Minimum Usable Scan Intervals .~_ .~.~.. . . . . , _ ___.._ . .._.,___ 2-38
SECTION 3-IEEE-488 Progamming
3-l IEEE-488 Commknds USed to Select Function and Range. . . , _. _.. . . _. . . 3-3
3-2 JEEEContact Designations...: . . . .~; . ~;~:~;::.~. . . . . . . . :: .~..;..: . . . .._............ . . . ..I . . ~::~. . . . . 3-5
3-3 Model 199 Interface Function Codes . . _~_.~. . . ~. . . . _~_.____ . . . _ . 3-6
.~~
3-4 BASIC Statements Necessary to Send Bus Commands. _ . .~. . . . . . _. _. . . _ . . . .~_.. . 3-7
3-5 Front Panel IEEE-488 Messages. . . _~.~~_ ~ ,.~.__,. _. ____.. ___ ______. 3-8
56 General Bus Commands and Associated BASIC Statements , .,. . . _.,, ________. _ _. . . . . . , _. 3-10
3-7 FactoryDefaultConditions ____..._._.... .__._..._._ jj ____._......_.._...__ _~t________....... ~..~. . . . 3-11
3-8 Device-Dependent Command Summary .~_.. __ . _ __ __ .;,. __,.__. _ . . _. .~. 3-14
3-9 Range Comniand Summary . _~_ ,. . .,~_~_ __ _ ___ __>_. 3-17
3-10 Rate Command Summary.. ..~. . _. _.._... .._. ..~. . . .~.. . _. . . . . . . . 3-li3
3-11 SRQ Command Parameters . _~_~_.~_, . . . , . _. . . . . __ . __. ____ 3-23
3-Y Bus Hold-off Times (Typical) . __~~_~_~L.~._, . _ ___ __~___ I . ___ _. _ . __. ___ . _ ______ 3-25
3-w Translator Reserved Words and Character . . . . 330
3-14 Translator Error Messages . . . __ , . _. .~..~. . . . . _. _.. _, . . . . _. I 3-32
3-15 TypicaITriggertoFirstByteOutliies __. . ...,,.. ~1.__...,..__.__ I____ I.... Y;;.:....,. _._.__...__ 336
3% Scanner Programming Commands. _. _. I_~L _____. _..___. _ . . . _... _,. _. . __ 3-37
SECTION 4-Performance Verification
4-l Recommended TZ+sEquipment .~, ____ _______ _ _. ~ I in. I~_ _~~__ ~._ 4-1
4-2 Liits for DC Volts Verification.~. _. _. ___, _ ___,..,_%,.,.”. _. _~_iia.l . . . . . .,,..,_. _i __~_,_,.__,_ 4-2
4-3 Limits for TRMS AC Volts Verification .~_ .~_ _. _ =_, . . . ,::..lI.. ,~.. _ .,_. 4-3
4-4 LiitsforOHmsVerification _.___.._. _. . . . . . . . _________....SC...~l~ _,,,._j___._._ Liil..___l‘L . . . . 44
4-5 Limits for DC Current Verificatidn. . . . . . . . . . . . . . . . . . .._. _..,... ~. . . ,,.. . . . . .._. i_ . . . . . 4-4
4-6 Limits for AC Current VeriFication. .~._~__ . . __. . . _. _. __ ~.~_._. . _. 4-5
SECTION 5-Principles of Operation
5-l Input Buffer Ampliiier (U46) Gain Configtiration . .‘. . _. _. . _ _ . . . . . . . 5-8
ix
SECTION 6-Maintenance
6-l line Voltage Selection .............. . ...... _, .......................................................... 6-l
6-2 Line Fuse Replacement ............................................................................ 6-2
6-3 Current Fuse Replacement ......................................................... 1......... _... 6-2
6-4 Recommended Calibration Equipment .......... : ....................................... L.. I.. ... .~,_6-3~
6-5 DC Volts Calibration ......................... _~~_~_
................................. I .... I ... , ... , 6-6
6-6 Resistance Calibration ........................................................ ,~....................... 1~6-8
6-7 TRMS AC Volts Calibration ..................................................................... 6-9
6-8 DC Current Calibration ............................................................ L_. ....... ..... . . 6-1.2
6-9 TRMS AC Current Calibration .................................................................. 6-13
6-10 Recommended Troubleshooting Equipment ........................................................ 6-18
6-11 ~ModelWTroubIeshootingMode ........................ _. ....... _~...... ~,-^~.......... - .... ~.-~.~
.. 6-19
6-12 Power Supply Checks ................... _.~.~..... . ... .I ......................................... 6-21
6-13 Digital Circuitry .Checks ....................................................................... , ....... 6-21
6-14 Display Circuitry Checks ......................................................................... 6-22
645 ScannerBoard Checks ...................... ..~................~....................~ ......... 6-22
APPENDIX C-IEEE-488 BUS OVERVIEW
C-l IEEE-488 Bus Command Summary __~. . . _1_ C-3
c-2 Hexadecimal and Decimal Command Codes __ . . . _ . . . . .._ . . ~..~_ C-7
c-3
C-4 Typical Addressed Command Sequence : .~.: .~.~1. . .,. . .~;.~. _~. _~. ; C-7
Typical Device-Dependent Command Sequence I _~ .~. . . _,. C-7
c-5 IEEE Command Group.. . . .~_~_.~.~, _. . . . . . . L C-7
i~fl10N I
General Information
1.1 INTRODUCTION
The Keithley Model 199 System DhJM Scanner is a five
function autoranging digital multimeter. At 5% digit resolu-
tion, the LED display can display &02,999 counts. The
range of this analog-to-digital (A/D) converter is greater
than the normal *199,999-count A/D converter
used in many 5% digit DMMs. The built-in IEEE-488 titer-
face makes the instrument fully programmable over the
LEEE-488 bus. The Model 199 can make the foBowing basic
measurements:
1. DC voltage measurements from l&V to 3OOV.
2. Resistance measurements from II& to 3OOMR.
3. TRMS AC voltage measurements from 1pV to 309V.
4. DC current measurements from lOOnA to 3A.
5. I’RMS AC current measurements from lOOnA to 3A.
In addition to the above mentioned measurement
capabilities, the Model 199 can make ACTdB voltage and
current measurements.
1.2 FEATURES
Some important Model 199 features include:
l 10 Character Alphanumeric Display-Easy to read 14
segment LEDs used for readings and front panel
messages.
l Zero-Used to cancel offsets or establish baselines.
l Data Store-Can store up to 500 readings and is access-
ible over the bus or from the front panel.
l Digital Calibration-The instrument may be digitally
calibrated from either the front panel or over the bus.
l User Programmable Default Conditions-Any instru-
ment measurement configuration can be established as
the power-up default conditions.
l Translator Software-User defined words (stored innon-
volatile memory) can be used to replace standard com-
mand strings over the IEEE-493 bus.
l Optional Field-Installable Internal Scanner-Allows the
unit to switch up to 8, 2-pole channels, or 4, 4pole
channels.
1.3 WARRANTY INFORMATION
Warranty information may be found on the inside front
cover of this manual. Should it become necessary to exer-
cise the warranty, contact your KeithIey representative or
the factory to determine the proper course of action.
Keithley Instruments maintains service facilities in the
United States, United Kingdom and throughout Europe.
Information concerning the application, operation or ser-
vice of your instrument may be directed to the applications
engineer at any of these locations. Check the inside front
cover for addresses.
1.4 MANUAL ADDENDA
Information concerning improvements or changes to the
instrument which occur after the printing of this manual
will be found on an addendum sheet included with the
manual. Be sure to review these changes before attempt-
ing to operate or service the instrument.
1.5 SAFETY SYMBOLS AN6 TERMS
The following safety symbols and terms are used in this
manual or found on the Model 199.
The A symbol on the instrument denotes that the user
should refer to the operating instructions in this manual.
The& on the mstrument denotes that a hazardous
potential may be present on the terminal(s). Standard safe-
ty practices should be observed when such dangerous
levels are encountered.
The WARNING used in this manual explains dangers that
could result in personal injury or death.
The CAUTION used in this manual explains hazards that
could damage the instrument.
l-1
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