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Model 199 System DMM Scanner
Instruction Manual
Contains Operating and Servicing Information
WARRANTY
Keithley Instruments, shipment. Inc. warrants tbis product to be free from defects in material and workmanship for a period of 1 year from date of
Keithley Instruments, Inc. warrants the following diskettes, and documentation.
items for 90 days from the date of shipment:
probes, cables, rechargeable
batteries,
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 original 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, INDIRECT, 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.
Model
199 System DMM Scanner Instruction Manual
0 1988, Keith& Instruments, Inc Test Instrumentation Group All rights reserved. Cleveland, Ohio, U.S.A. July 1987, Fourth Printing Document Number: 199-901-01 Rev. D
SAFETY
The following safety precautions
PRECAUTIONS
before operating the Model 199.
should be observed
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, insulated 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 section.
maximum
allowable
input as defined in the~specifications
and operation
;.,
,,
cw%a
wi) sdw
3a
MAXIMUM
READING
RATES
(Readings/Second)'
STORAGE
& SCANNING
Stores
CAPABILITIES
reading, range, and
SO&Reading Memory: scanner channel.
Trigger: One shot or continuous from front pane,, IEEE.488 bus. and rear panel BNC. Programmable Programmable WITH MODEL Pmgmmmable Fmgrammable Pmgnmmable and scan. Reading Interval: 15ms to 999.999s. Trigger Delay: Ims to 999.9995. SCANNER or 4-pole. Manual, step,
1992 &CHANNEL Configuration: Channel Scanning Limit: Moder: t
1 to 8.
Ratio: Channels 2 thmugh 8 referenced to Channel 1.
IEEE-488
BUS IMPLEMENTATION
DCL, LLO. SDC, GET, GTL, IFC, REN, EOI, SRQ. ATN. SHl, AHI, T6, TFQ, L4, LEO, CD. El.
GENERAL
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
MULTILINE COMMANDS: UNT, UNL, SPE. SPD. UNlLiNE COMMANDS: INTERFACE FUNCIlONS: SRl, RLI. PPO, DCl, DTl,
All front pane, functions and programs are available over the IEEE-488 bus, in addition to Status, Swice Request, Output Format, EOI, Trigger, Terminator, Display Message, and Non-Volatile TRANSLATOR. IEEE-488 address is programmable from the front panel. _ ,I
MODEL
CONTACT 4channel CONTACT
1992 SCANNER
CONFIGURATION: 4pole. POTENTIAL:
OPTION
8-channel 2-p&, or
to +WC.
per contact pair. inX'?~
MAXIMUM SWITCHING RATE: 40 channels/second, cluding Model 199 4'/r-digit DCV reading time. CONNECTOR TWE: Quick disconnect screw ~y$inaIS, AWG maximum wire size. MAXIMUM load. SIGNAL LEVEL:
POWER: IOS-125V or ZlC-25OV, rear panel switch selected, 5oH.z or MIHz, ZOVA maximum. 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.). ACCESSORlES SUPPLIED: Instruction Manual. ACCESSORlES Model 1992: Model 1993: Model 199&l: Model 1998-2: Model 1651: Model 1681: Model 1682A: Model 1685: Model 1751: Model 1754: Mode, 5806: Model 7W7-1: Model 7007-2: Model 7008-3: Model 7008.6: Model ,751 Safety Test Leads,
200" peak, lM)mA, resistive signal
CONTACT LIFE: 210' operations (at maximum level); >I@ operations (cold switching). CONTACT ISOLATION <75pF. RESISTANCE: BETWEEN
>lO%
lSOLATION BETWEEN > 10% < 15OpF.
AND EARTH:
COMMON MODE VOLTAGE: mhaf and earth.
35oV peak between any ter-
MAXIMUM VOLTAGE BETWEEN ANY TWO TERMINALS:
2OOV peak. AND
MAXIMUM VOLTAGE BEI'WEEN ANYTERMINAL 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.
AVAILABLE: B-Channel Scanner Quick Disconnect Scanner Conn&tor Single Fixed Rack Mounting Kit Dual Fixed Rack Mounting Kit SO>Ampere Shunt Clip-On Test Lead Set RF Probe Clamp-On Curem Probe General Purwse Test Leads Universal T&t Lead Kit Kelvin Clip Leads Shielded IEEE-488 Cable. Im Shielded IEEE-488 Cable, 2m IEEE-488 Cable, 0.9m (3 ft.) IEEE-488 Cable, 1.8m (6 ft.)
Kit
specifications +ect to change without "otke.
199 Front Panel Operation
TRIG SETUP
SHIFT/TRIG SETUP
STORE to enter nwnu.
CONTINUOUS: rates contmlled ONE SHcrT. Osec to 999.999sec SELECT OFF: Interval 2I75msec. other programmed parameters. SELECT ON: User-pmgrammed depending on Reading, scanning, by INTERVAL. and storing * * * 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.
NEXT to scroll to next menu option. r A:'
Trigger
DELAY
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.
INTERVAL
r A/W
L
interval (Ismsec to
999.9994.
,,,
~,, ,, ,,,,
DMM SETUP
SHIFUDMM SETUP to enter menu. Displays current software revision level. off autocal mufir% for faster
NEXT to scroll to next menu option,
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.
REV
MUX OFF: Turns reading rates.
MUX
MUX ON: Recommended IEEE for best accuracy. Use numeric keys to program IEEE-488 ptimary address (O-30). FREQ=SOHZ. FREQ FREQ=60HZ. Line Frequency. Line frequency.
SAVE YES: Saves present configuration. SAW SAVE NO LEDS ON: Test front panel LEDs and annunciators. LEDS LEDS OFF DEBUG YES: Enter troubleshooting DEBUG DEBUG NO RESET YES: configuration. NSET RESET NO Returns unit to factory default mode.
TYPICAL 5% DIGIT CONVERSION
MUX ON, DCV, ACV, AU: MUX OFF: Z&nsec (33msec) 1lOmsec (U3msec)
TIMES
MUX ON, OHMS, 3ookn range and lower: 1lOmsec (l33msec) MUX OFF: 63msec (76msec) (Times in parenthesis are for 50Hz operation)
TYPICAL AUTORANGING
DCV, DCA ACV, ACA OHMS (3OOkn range and lower, 1.4sec
TIMES
35amsec
500msec
ONE-SH(TT OPERATION
In the oneshot trigger mode, each reading consists of multiple conversions to fill the Running Average User Filter (30 canvenions), or the Running 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.
(Tffes shown are to coIIeCt range and do not include conversion times for final reading.)
Scanner Operation
SCANNER
l
OPERATION
NOTES
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 Channels will not close in the middle of conversions. start of conversion (with scanner disabled, ween trigger and start of conversion). closures.
POLE
r A/T
2 POLE 4 POLE
MANUAL: A!lows channel with SCANNER key. STEP: lnaements to be manuaJly closed or trigger,
-Any programmed DELAY is inserted between channel closure and
DELAY is inserted bet-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
Mode
; A/V
RATIO
L *L
L
one channel perintenral
SCAN: Scans one set of channels per interval or trigger (minimum time between channels). ON: Channels OFF
a fixed range.
2 through 8 referenced to channel 1.
l Ratio operates only on l l
Range changes will restart at channel 1. In MANUAL, at least one reading must be taken on channel 1 before attempting to display ratio on channels Z-8.
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 programmed 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.
ACTIVATING THE SCANNER USING SCANNER
SCANNER followed by number (%3) activates the scanner. - In MANUAL, channel number selects channel to be dosed.
l
WITH DATA STORE
In STEP or SCAN, number selects channel limits and starts scanning process.
l
STOPPING THE SCANNER (openingau aam&)
SCANNER followed by "0':
Select desired scanner parameters and interval. Activate scanning (SCANNER, channel limit). - Program data store size. . TRIGGER vd, start data store and automatically restart scanning at thannel 1 synchronized with data store location 1.
l
EXAMPLE' OF FAST SCANNING INTERVAL
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.
DETERMINING
SCANNING
- scanning without s&ding interval
--Program INTERVAL SELECT to OFF. -Interval is sl75msec. depending on other selected parameters. --INTERVAL OVERRUN message wi!J not be displayed.
l
Mienurn -Interval
Interval Tiie Calculation time is the sum oE time)
1. (conversions per channel) x (conversion 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. scanned) is the
-In SCAN mode, (sum of l-4) x (number channels minimum interval setting.
199 IEEE-488 Programming
DEVICE-DEPENDENT
EXECUTE X FUNCTION Fo
R F2 53
COMMANDS
commands
Execute other device-dependent
CALIBRATION co
2
E F6
DC volts AC volts Ohms DC current AC current ACV dB ACA dB
Calibrate first point using value (V) 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
RANGE A'3 ACA
DCV ACV Auto DCA Auto
ACA Ohms
Auto
dB
dB Auto A& Auto Auto Auto Auto Auto Auto
Ro
s R3 R4 z R7
Auto Auto 3OOmV 3WmV 3OmA 3OmA 300d `Auto 3V 3V 3A 3A 3kl-i Auto 306' 3OV 3A 3.4 3Okn Auto 300V 300V 3A 3.4 3OOM Auto 3oOV 30%' 3A 3.4 3Mn Auto 3mv 3wv 3A 3A 30MR Auto 3OOV 3wV 3A 3A 3OOMO Auto
Auto
Gl G2 G3 G4 G5 G6 G7
DATA FORMAT GO Reading with prefix.
Reading without prefu. Reading and buffer location with prefix. Reading and buffer I&ion without prefix. Readingand channel with prefix. Reading and channel without prefix. Reading, buffer location, and channel with prefix Reading, buffer location, and channel without prefix
ZERO
Zero disabled Zero enabled Zero enabled using a zero value
MO Ml M2 M4 MB Ml6
SRQ
Disable Reading overflow Data stcre full Data store half full Reading done Ready
(V)
M32
Fmx
Pl P2
FILTER PO
Internal and front panel filter disabled Internal filter enabled Front panel filter enabled
EOI AND BUS HOLD-OFF Enable EOI and bus hold-off on X Ko
E K3
Disable SO,, enable bus hold-off on X Enable EOI, disable bus hold-off on X Disable both EOI and bus hold-off on X
RATE so
Sl
4%digit resolution, 2.59msec integration period 5%digit resolution, lie cycle integration (16.67msec. 6OHz; 2Omsec, 50Hz)
TERMINATOR MI ii
Y2 n
CR LF LFCR
TRIGGER m
n T2 T3 T4 T5
MODE Continuouson Talk
T6
T7
One-shot on Talk Continuous on GET One-shot on GE? co"tin"o"s on x One-shot on X Continuous on External Trigger One-shot on External Trigger
STATUS
UO Ul uz u3 u4 u5 Send Send Send Send Send Send machine status word error conditions Translator word list buffer size current value of `?I' input switch status (front/rear)
READING
BO z
MODE
MULTIPLEX
A0 Al
Readings from AID converter Individual readings from data store All readings from data stwe (buffer dump)
AukKzd multiplez disabled
Auto/Cal multiplex enabled
DATA STORE IO
h
SIZE
DELAY Wll SELFTEST JO HIT BUTTON
HKl
Wrap around data store mode Data store of n (n=I to 500)
n=delay period in milliseconds, 999999msec)
(Omsec to
INTERVAL Q'J Qn VALUE v*nn.nnnn or
Test,
ROM, RAM, E?`ROM
Default interval, l75msec (SELECT OFF) n=intwval in milliseconds (l5msec to 999999msec)
Hit front pane, button number n
Calibration
value, zzo
value
DISPLAY Da
D
v*n.nnnnnrtE+n
Display up to 10 character Cancel display made
message.
a=character
SCANNER
PROGRAMMING
COMMANDS
STATUS WORD FORMATS
UO Status Word Format
SCANNER SETUP MANUAL Au channelsopen NO
Nl NZ N3 N4 N5 N6 N7 N8 NY !5lXP NlO Nil NE2 Nl3 N14 Nl.5 N16 Nl7 NT3 N19 SCAN N20 N21 N22 NW N24 N25 N26 Z-pole 1
4-p& :. 3 4 CHAN4MAXERROR CHAN4MAXERROR CHAN4MAXERROR CHAN4MAXFRROR CHAN4MAXERXOR open 4Pole 1 2 : CHAN4MAXERROR CHAN 4 MAX ERROR CHAN 4 MAX ERROR CHAN 4 MAX ERROR CHAN 4 MAX ERROR L 4Pole Limit 1 2 3 4 CHAN4MAXRRROR CHAN4MAXERROR CHAN4MAXERROR CHAN4MAXERROR U2: Returns Translator U3: Returns word list. Limit
6 7 8 CHANgMAXERXOR Stop scan, all channels Z-Pole Limit 1 z 4 5 6 i CHAN 8 MAX ERROR Stop scan, all channels Z-Pole Limit 1 open
Ul Status Word Format
data store size (SZE = CCQ. value programmed with V command in floating
U4: Returns present p0illt.
u5: Returns INPLJT switch status (O=fmnt, l=rear).
POLE/RATIO
E 02 03
SRQ MASK AND STATUS BYTE FORMAT
Z-pole 4-p& Z-pole ratio 4-p& ratio
SCAN INTERVAL Default 175msec interval QO
Qn (SELECI OFF) n=tnterval in msec (15.999999mxc)
TRIGGER DELAY* n=delay in msec wn
(O-999999msec) *Delay to be used as channel settling time.
TRANSLATOR DATA FORMAT
Translator Words and Characters -miis.latorword or character Description
ALIAS B NEW OLD SAVE LIST FORGET Defmes Translator words. Terminates definition string. Wildcard definition character. Enabled Translator. Disables Translator. Saves Translator words as power-up default. Returns list of Translator words. Purges Translator words from memory
Table
Of
Contents
SECTION l-General
1.1 1.2 1.3 1.4 1.5 1.6 1.7 1.8 1.9 1.10
Information
INT?""-`^"' INTRODUCTION ~._~. . ._.~__~__~ FEATURES FE.4 .~. _~...t . _ _.L_ ___~_-. ^_ __ WARRANTY INFORMATION . . ., t..,,. . . I MANUAL AI ADDENDA _. . . _ __ _ .,_,_ ~.,I :.:.; _...: ..__.__._ SAFETY SYMBOLS AND TEE TERMS _ _. .~. _zx~_~ . . iij.~.;ii~.i~i__i .__...-.. SPECIFICATIONS.. . . t. _ _~.~.-... . . . . . _. .. .. ._. . _. , INSPECTION ._._........_... ;.._....,.. _.._ . . . ._................... _ . . . . . . ~..;.;:~..:~z::::.. USING THE MODEL 199 MANUAL .~~.~~.~._.r.._ . . . . . . . . . ___. -~. . .._I. .: . . --. . -_ . .,. . i . . i GETTING STARTED .`:~.~. _:. <,-I.. _ a. _. i .~. . _~._. _ .,._~_,__.,. . . . . i.. , i.. .,,_, I,_ .,_~i : j _ ..,i ~. .I . ACCESSORIES . . . _ __.__ ._ _)_r,1513~1--11111111~1*.",_I ,i #i ,:. _~Lz"1_: :. . .,. _ _. . .
,.,_" I . 1. AU._ a i"..?/V,"7,,_.i .l" ,asic _:_ _~;~i _:_ :`.,?. _ _ . " `.`.;.:~:`. I :`;..I;
.'
,1-l
l-1 l-1 l-2 l-2 l-2 l-2
SECTION 2-Basic
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
DMM Operation
,A_..-ia..,u..,, ...... INTRODUCTION I. ......... .`. ................... .: .. 1. .:.~. ...... ~;~. 2-l ; .......... ^....................................................... POWER UF PROCEDURE .; ....... 2-l ............ i.~. ... :...~;...i ...... rr;:. ............. . ".*.~.;...~.;.;.;: 2-l LinePower ..................... ._ ........ . ___I____. .._- .................. ;.~;.~.:::;~ ..... 2-l PowerUpSequence .......... .~.,..~...~.,; ... .... _ ..... _ _ ...... .~.-...~.~. .,~. .`.~.,, .,,&,.~~. i .... `: L' .... I. ..... I ........... ., ...... 2-l Default Conditions .............. FRONT PANEL FAMILIARIZAXTON ................................................ ..i. 2 ... ___~__ ____ ... 23 __ _,-_-l __..-- ........................... : ...................... 2-3 Display and Indicators .............. :__ 2-4 Power Switch ............. ..___ ...... __,_.i_.~ _____' .__.. ....................................... lsIx irl_ .__. .. .,.. .:~.~.. ____, 2-4 Controls ................. ._.,_ .., ....... ,_.=_ ",,_ .. . ..v.r j __._;_ ........................ ..... j_~i~~~w~~iJ.. Ibjl ; ..:;~;~. . ..~_ . .~-,; _I~ ..l'l.:~:~.. `.`.`.`:: . ..::". . :::: 2-5 .. .. CAL LOCK Switch ................... .,2-5 +.-~...- .: ____.: ........ ~.._~..l .................. _. .......... INPUTSwitch.. ...................... i_.~,__~_:~>...... :~~ .......... i~__~ .._ ......... .. 2-5 CutintInjxtFuse.. ............................... 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 _.`,.i ii,. ,_. . . 2:. _,_,.. ~ .`. _~i 2-6 _. Scanner Card Slot. _~_ t .._~1 _~_ I;.~_. _ . ,~i __ ,,.i v,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 2-13 dBMeasurements .._._...____ I.~__._._ ____. _."_+, ,.L...._____ c_.j __... in ..__ ;__l~ __.____~....__,____ TRMSConsiderations . .._......__._ t_ ~_..._..__,._..__...._. r.-...~..i ___...... ,I ______.__; ._._ ~ 2-14 dB Applications . .~.. . _ _. . . .,__ __,_. . . . . _ _. _. _ _~_~_~. __ . _ ._ _ _ ___ _. . .~__,_ . .~_ . ,. . 2-16 _-__ _~. DMM SETUp PROGRAMS _ . ,_.~1 l~=I~~f~._ _. . _.:.I. _. i. .~. .~>_ _ ____. _. . _: :~. . ;. _ . . _~._ _; 2-16 SoftwareRevisionLeveI ._...._.___ __._~ _._,____ I,_ _......_._._.... i_i,.i ._...... 1 .__...____._ :.. 2-17 Multiplexer, AutoZeroiCal ..______ ~..~._____~ __.._._.. _ __.._ L.__- L...~ _,.,_,.,. . ..__ i ___. ~...~_.. ____. 2-17
I,
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- ___.; .... -~+ . ..< ......... :l-.`;.~-~: ____ :..,% l9 1_ ._ 2% ;~_I . ,.`. : J -!.`&-lg :: L.,., FRONT PANELTRIGGERING ..`.~:~..:......~.-.t..~..~.....~~~.~;,., . * -8,; -,A rj ,>,,>,,i ......... Trigger Mode Selection .............. _,__,,L _,,_ .......... ,.,__ ., --. .............. ._. .................. _j~:__ 2-19 TriggeT Sources ....... : ........ .,_~...... .~:. .; ......... __~_, ..... _ ................ __ ........... 2-20 ..... i,._ ... ... i ... ,Trigger Delay ................... :_. e `v, ,`:~:,`:*~`s~:~,"`.~:u.) ,_..~.LI'::.z 1 :`.u~/ .... `.,...... .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~__~_ _~ ~.~~/~ `.l.~l...`. .___ .... .... ....... ....... ;..i.:..`..~_~.i.~i. `2-U External Trigger. ................. __ .. .~.:.,I:.:,.~. .... _: ................ , ............... i ...... i................. Meter Complete ..................... .... I,.--.~-~,~:-~r,.`.:.l,~r.,2-22 ~____iY_~.iii.i_j~i~i_~i~_~__~jj_~iii~~~:I~_~~._.L~i_~ 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 .................... ., ........ _,.............. __ .. .,..,.... _ ........... ._ . _: _,_....... 2-23 SCz4NNE.R OPERATION (WITH OrrION 1942)' .. :~;. : : .... 1 .... _ .. 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/, -~-,-.`~:.`.Y::~.`.`:. :X 2-30 ... i :_ RatioMode.. ............. ................~ ....... _,I.II,_ . -I .,..., ;_.,._~ ........ ., . .................. :.;2-30 Reading Interval ..................................... .~L ........ ,_,,._ .............. .___I.: ..... ~_:____~._ 2-30 Scan Limit .................... I .. j ... ,_i zii; ., . .pYYi..rpz,, ..... _ . 1. `~ r~.:.:;:.r::.:_`: 1'. i :. . I I . L:`:`.`.:L.... `_?~`1:,,2-31 I 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 ... ._.. ` ,.__., i.,il_ ,., i`~"~_~~~" 1L.-`,--,-IL.,i,~~~~..~~:..,...111'--.-2~ . ___, Minimum Scan Interval Ties. ... ,._.__."
SECTION 3-IEEE-488
3.1 3.2 3.3 3.4 3.5 3.6 3.61 3.6.2 3.7 3.7.1 3.7.2 3.8 3.8.1 3.8.2 3.8.3 3.8.4 3.8.5
Programming
INTRODUCTION ............... .._ .......... L,l_ii_i ............ :_:__/ ..__...__._ ..... :i..:..:.e..;-.r. 3-l A SHORTCUT TO IEEE-488 OPERATION. ........... _.......... _,I.,_ ..e..u .. .,_ <... ..A... _._..L.....~ ... >~.`:z.... 3-l .... BUSCO~NNECTIONS ............................... .............................. ___., ......... 3-4 ......... ...... INTERFACEFUNCTIONCODES _ __I__._ ..... .. _ .... ~v.__.~ ~._.~,~__ _._.r ..... . . . ........ ..~3- 5 PRIMARY ADDRESS SELECTION ....... _................... _.,_ . _ ... __ ... 1,_,_.................. ., 3-6 CONTROLLERPROGRAh4MING.. ....... ~.I.~.~____................................ ... _._,____(_ . .__, 3-6 .... CotitroIIer Handler Software ........ .., ............................................. ..~_~_~._~._ - ... 3-7 ... BASIC Interface Programming Statements ............................... __ .. _ .... .__ ......... _._ 31 FRONT PANEL ASPECTS OF IEEE-488 OPERATION. ..................................... -. ...... 3-7 ~3-7 i...~ ......... FrontPanelEnorMessages .......................................................... IEEE-488 REMOTE Indicator and LOCAL Key .................................................. 3-9 .................. GENERAL BUS COMMAND PROGRAMMING _,i,. ................... -. ....... 3-10 REN(RemoteEnabIe) ............... _,.......................................................... 3~10 IFC (InterfaceClear) .................. . ........... ____ _______,_,___ .............. ........ _&_~ _,._,i, ..... . 3-10 LLO (Local Lockout) ...................... i .............. _ .... ., . _ ............................. 3-11 GTL(GoToLxaI) .......................... ._,,__, _,___ ____: ...... 1.~ pi............... ;.:A.-.~. ..... 3-11 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
_,.. _,_................... : ..... _ ... _ .. 3-12 SDC (Selective Device Clear) ........... _ _ ....... : ........... _ .. _. ............ _. .......... , ... 3-12 GET (Group Execute Trigger) ................................. _ .._ _ ... ~..__. 3-W SerialPoJIiig(SPE,SPD) ...................... .._. ______ I .._._.._ ... _._._.._ ........... .................... ._ ...................... 3-13 DEVICE-DEPENDE&T COMMAND PROGRAMMING _. ........................ 3-16 Exe&e(X) ........................... ::...: .... ,_____ .................. .._ .._ _ .......... 3-16 Fumtion (F). ..... ..~_.._ ...... I..._ ... ~___..................................... 3-16 ~`~~~1 Range(R). .................. ~..~_-.~...~_ .... _ ................................................ ,,,, __~:~< :?_ ... 3-17 Zero(Z) .............................. ~_. .............. ................................ _ ............................. , ............ 3-17 Filter (I'). ................... ._~__.~_ ._~.~..~_...._. ....... _. ................... _....... 3-J.8 Rate (S) ..................... ..; ....... ~,_,-.._._ .._ I._.~ .. .~..~~_. ........... . ___ ____,,__ _____._____ 3-18 TriggerMode(T .._. r .. ,__^_ _ .__________.__ ............................. _ ... __ _ ... _ _ ... ____ ...... ., ...... _ _. ...... 3-19 Reading Mode (B) ................................ ........................... Data Store Interval(Q) and Size (I) ............ .._..._ _:. ... ~..~...: ... 3-19 _.. : ; .... 3-20 Value (V) and Calibration (C) ................................. _ ........................ ................................... DefaultC&ditions(L). _._. ........ -. ....... _.l.. ... -...~ ... 3-21 Data Format (G) ..... , ...................................... ^_ ..................................... 3-21 _. ................ _ ....... 3-22 SRQ Mask (M) and Serial Poll Byte Format _ ............................. , .............. 3-24 EOI and Bus Hold-off Modes (K) .............................................. .. _ .............. __._............... __,L_,_,_ 3-25 Terminator (Y) ................................ _,_. _ ..... _ .3-25 Status(U). ......................... ~_~___. .................................................... ........... . _ . __. .. __ .. .._ .. _ .. __ ..... _~_ __._,_.... ., . 3-28 Auto/Cal Multiplex (A) .......................... _: Trigger Delay (W) .......................................... ~_................................... 3-28 ...... _~. .._ .. _. .... . ... _. 3-29 Self-Test(J) .... .._ ................... ........ .................................. Hit Button (H) ............................................ ,_... _. ................ .___ ......... _., 3-29 ................................................... Display(D). _ .............. _. ............ >. .... _ .. 3-30 . ................... ::...;~3-3 0 TRANSLATORSOFTWARE ......... ._______ _.~......................... _. ........... 3-31 Translatoe Format ................ _~......... ..__. .................................. Wild Card ($) .................................. ________.______._______,_ _,_______._____._______ 3-32 3-33 _ ...... ..:. .. .: .................................. NEW and OLD ................................. 3-33 __. ............... __~ ....... ... CombiningTranslator Words ......................................... , ......... 3-34 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.. .................... _. ............ _ ___._ .. 3-35 FORGET .................... ~;..~... .._ ........ ~..~.w..:..: .. _.__._._. __. ... _ _.._......._...___ _ ........ __- ., _,_, .. _ . _ 335~ _._m _I BUS DATA TRANSMISSION TIMES ... ,__,_r T_ . _~_~_ _ _ .. .,.._. _. . _ _ . .z._ ......... .~_. :. ..... _ 3-35 __~__ __~_.__ ........................... .. : ................ SCANNER PROGRAMMING .......................................... ............ ....... _ ._ . __ __ _ ___. ._ _. 3-38 Scanner Setup (N) .................. ... _~. _. ...... _. _,T _i__. _ _~.i_. ..... 3-39 Pole/Ratio Mode (0). ......................... _~. __~_ _ 3-39 __ ............... ., ............................... Reading Interval and Delay Programming ._ ........... 3-40 Using Data Store with the Scanner .............................................. ., ...... _". . _. .......... 3-41 Testing Resistors ............................. _ .. _. _ ... __ __ ........... :_ 3-44 Amplifier Gain Testing ..... _~~; ............................................................. :,
SECTION 4-Performance
4.1 4.2 4.3 4.4 4.5 4.5.1 4.5.2 4.5.3 4.5.4 4.55
Verification
4-1 4-l 4-l 4-1 4-2 4-2 4-2 4-3 4-4 4-5
............................................................... INTRODUCTION ............... ..... ENVIRONMENTAL CONDITIONS _.......... __ ..... _.~__. .... __ .. _ .......................... .... _,... I~...J _. ... _. ................ INITIALCONDITIONS ....................... .1._ ......... _~ .._. ..... RECOMMENDED TEST EQUIPMENT ........ : ...... : ......................... ., ..... _,........... ................................................................... VERIFICATION PROCEDURES DC Volts Verification ............................................................. , ............ TRMS AC Volts Verifications ........... .`.~_...................................................... .. Ohms Verification .............................. _~_~___ .,.,_ ..................................... DC Current Verification, ............... _. ....................................... ._ ............... TRMS AC Current Verification ............................................ _,_............ ., ... _.,_.
u1
SECTION 5-Principles
of Operation
INTRODUCTION . . . .._......__._ >.,i_<~r...~ ___r..... 1,__ . . . . . . . . . . . . ..____._..~...... a,>_,,y__,. ;:i~;l,:~;~i~5.1 5.1 OVERALLFUNCTIONALDESCRII'TION ___......_....._... _ .I-., _,_.._.__.__ .__.._. _ .___.. I,_.~.._.,. 5.1 5.2 ANALOG CIRCUITRY.. . _. ..__I __-_ __~_~A __~_I_.. _. _ _ ..,. ii,_,..~_ _ z _. . :.`I-. _. _ .~.,. _. 5-l 5.3 InputSignalConditioning .._.. .._._. _~_I ,._._ 1 . . . . . .~,I ..-.-. i_i~ . . . . . i _.._ ;.)I'..;~.:.' _.._ i_i_. 5-1 5.3-l 5.32 Multiplexer . ~5-6 r.`.;. ______^___ ~_iii_~ ____ ~5.8 -28V Reference Source . ~. . ~. : .~. : ;.::~.. . . . _ .,-._ /. . . . iii _........__ 5.3.3 ... . . . !.~.I ..____..... _ ..,.......... 2 . . . . . . . . i . . . . . ..__....____ ~_i.,_,.. 5-8 513.4~~~ InputBufferAmplifier .._.....,_. __._,_,_._~_.~._._~______~..,_ _~.......___....._.___. ..__ ____ ____ i...:.....1=~~5-8 A/D CONVERTER 5.4 ~~~:CONTROLCIRCUITRY ~.~.~.,.<..;z .__....__. > ,...-,.... i.i..~...~._ . . . . . . . . . . :..:..i~ . .._.... `1. 5-10 5.5 5.6 : DIGITALCIRCUITRY .__.____tt__ ::w..~.-. _____,_.:___,_._,_..______,_ ~.~_.~______L._t____...; ____._,,. ;v_._ 5-10 5-10 Microcomputer . . . .._.._.._..____... ~_~i__,ij .,_. Ijj,__,,j' . . . . . . . . . .l_-~._..;_;..: . . . . . . . . z..:;..;..;... 5.6.1 Display Circuitry . ; _ _ -1-i ,".., . .. .._. _ ___,_ _ , . . I :-.: .;~.-- _. .~_~_ j~l~_l, .~_.`+z.. .:: :. . . .,. &lO ;. 5.6.2 POWERSUI'I'LIES _.,__..; .__.__ :..~:.. ._...___ __.. I).~ .._._._ -~.~.-..I...:..;..~ __._.I :._.i _,,.._.__ ~5-IC 5.7 5.8 SCANNER . . . . . . . . . .._.._.....~..... ~,_______. _...,. L. . .._.-__I_.._, _.I._..._.... 2 .._...._..__..... 5-10 c0ntr01cicnilTy . . . . . . . . . ..___. _... -.~..~~-;.~.~-~~,~...~ ,........ ~_.~.i~....___.....____.. ..,_ _ . . . . . . . . 5-10 58.1 Switching Relays .. . . I. _ . _a~.~. __.i,. i.i. ._ _ . _.i .~:; . i: .z: . . . . I._. _ ) ;~:.~xr:~.. _. . S-11 5.8.2
SECTION 6-Maintenance
6.1 6.2 6.3 6.3.1 6.3.2 6.4 6.4.1 6.4.2 6.4.3 .. 6.4.4 6.4.5 6.4.6 6.41 6.4.8 6.4.9 6.4.10 6.& 6.5. 6.6 6.7 67.1 6.7.2 6.7.3 6.%4 6.7.5 6.76 6.7.7 6.8 6.8.1 6.8.2 6.8.3 6-l ... __., i ,a,_:i..>.: ..i.:.;; .. _`i .... ._I'., ..:.... L.`:.-,:,-:-~ ....... ................ .t......_ INTRODUCTION i;. .,_,_, -.----T.i~...-..L~~ ..- 6-1 ..I: ... . ............ ._ ............. ............. LINEVOLTAGESELECTION .... ~61 ;...:.~..:..A:.1 ............ l,i~irl_ii_,i,i.~.ii_._`_1. .......... ~.,.-.; ._ 1.; ..... FUSEREPLACEMENT ..... ;~_; .,._ ... . .. ..~~....~..~..11.... ........... 6-1 LineFuse ....................... . ..-L......i.~~..............~:~~~: _i ....... 6-2 .._ .. i ._.__ f.. ... _ ............... L....................... Current FU se ..................... c. -.-:.`:a; .... 1~: .... 6-2 ........ _.__ ......... ;: : ........... I..:. ....... ............. _^__ .. .~.I;~._.~ CALIBRATION ........... 6-2 ;. : ... __ ........ . ........ _,.;, ........................ ___ Recommended Calibration Equipment ... : . .~; :~.~:::~I. .. ._ _ .~i,l.Lj.l ._ ...................... Environmental Conditions . ; :. ; __: ....... : ...... :~ 6-3 .: ............. 6-3 :_ili.. .. ~.i. ... . ................................ Warm-UpPeriod.. ...................... _ ... CAL Lock Switch .............. ,.,__,_ L., _ ... _yy_~Ijmj.i.... i .. j i~i..* :.. _ ....~..~.L~...~.i .. _ _ -`: ;.r: .z: : . : . ; ..... 6-3 6-3 I .............................. Front Panel Calibration ............ ...._: ......... . . ... . ..... . .. ::. ..... 6-4 . ............... :. .. .~.+ .... .*. ............ ;.. IEEE-488 Bus Calibration ........................... #,,., ._ ................. _. ..... .,,_,, .... _.. , _._.. _,_ .; L__ : .. `L jl, 6-5 Calibration Sequence ..................... ........................ DCVoltsCalibration.. _ . .._ ..... ,__L.__~. ..... ..~.....`....`~~~.i.`.~.......`.:.'.:'.~..l. 6-5 ., _:_...... _~;. ; 6-6 _ ............ . pi.~ii. .. i:. ...................... Resistance C&&ration .................... L.... l.. ................ ....t...ii ..__ _. ..;: ....... _ ....... _ 2, 6-8 TRMSACVoltsCalibration ...... ........ 6-12 . .................. __,_._______ ..... .:..~ ........... ~.,~"~.-~ ........ DCC unrent Calibration ......... .,_ ...... ..; .... 1': 6-12 _ .............. i _.__ .._._. .. _~.,:......... _,.,_ TRMS AC Current Calibration ........... L.. .. ~...6- I3 +........... ................... ............................. DISASSEMBLY INSTRUCTIONS.. __._ ......... ~.~..6-17. ............................ SPECIAL HANDLING ....... I 6-v ................ ._I,, _ .... ._,__ _._i~_.i_. .... ..i .... L... ii :..::z:.: ............. .~:~I TROUBLESHOOTING ,_.,_............ ..... i .... _`*._ _`wr~_:_ ~6-17 Recommended Test Equipment .................. Il~_~_~.~i i_ ..... ;..e_ .._._; _ ...... ~;.;....~6- 17 ............. _.._. _._--,.L~.i.~~__~~i,.~ .... ..^ ._ i ........ .. I'owerUpSeIfTest . ..__ .. -..;..~.:.~..:. 6-l8 _. ... ..___ _ i.__._-__.iz~ Diagnostics ............ .._.__ ..................... .._ ............ 6-18 _.____.^ .~.........._. .: .__, L___ .... __I ..... PowerStipplies.. .................... Signal Conditioning Checks ............ _ _....... . .- ....~=.;...... _ ............................ ..L. _._........... 6-18 . ___._._.__._ 6-18 ..... _._ .... ji,. ............................. DigitalandDisplayCircuitryChecks.. .___.__ ii._i,_i_i 6-18 ____., i _.___ __w,i_~/. Scanner Checks.. .............. .~...~__.__ __ ..... ................ ........ _..i.....l.i.....l.._i_ i ..... .._. izi,.__ ...... .._ .. 6-22 ~SCANNERINSTALLATIONANDCHECKOUT. 6-22 .___ ,i .......... .._. ..... ;.: ._. ...... .;- ........... Installation .......................... _ ............ i ......... 6-23 _._&.................. Card Checkout ..................................................... ; .... 6-24 . ............ _. ............ _,_...... .__ ___ . _._. ........ Relay Shield Jumper ..................
iv
SECTION 7-Replaceable
7.2 7.3 7.4
Parts
7.1.
7.5
7-1 l,_ ....... ..1~..... : ., . ., L.II II~,.~. .,.~. ..... ,."i_I:,, i _., _.ii i: i _~_;~ .1 ....... INTRODUCTION .......................... ..... .:. ........ _.-._ .---- .. ......... .._,". ... . "....~L .. 7-l ~.~.~...:~..~: ,,--..-.-. PARTS LIST ................... 7-1 ORDERING INFORMATION .......................................................................... 7-1 ..I, ................. _ ................................. FACTORY SERVICE ................................. ;. ...... 7-1 SCHEMATIC DIAGRAMS AND COMPONENT LOCATION ~DRKWINGS .... : ..............
APPENDIX
A
CODES AND TEEE-188~ MULTILINE INTERFACE COMMAND MESSAGES _ . . A-l
ASCII CHARACTER
APPENDIX
B
PROGRAMS _~. ~._. . . . . _ . _ . t .. . . . _ _ ___ _ _ __ _,. L . _,_ B-l
CONTROLLER
APPENDIX
C
:. : .:: :: ,. .: .`. : :. r .. . . . . . _. . _~. _ , . : _ C-l
IEEE-488 BUS OVERVIEW
List
Of
Illustrations
SECTION 2-Basic
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
DMM Operation
2-3 Model 199 Front Panel. ........................................................................... 2-s ,~ __ ................. _ Model 199 Rear Panel ........................................................ _... . ............... _ _,__ ~__... .._ .._ 2-10 _ ................. ................... DCVoltageMeasurements _ ....... _ . 2-11 ................................................ Two-Terminal Resistance Measurements. 2-11 .......................................................... Four-Terminal Resistance Measurements . ........ 2-12 TRh4S AC Voltage Measurement ......................................................... 2.12 ....................................................................... Current Measurements.. 2-21 _.. , ............. ............................................. External Trigger Pulse Specifications _,_ Z-22 ,,., .... (. ................................................... Meter Complete Pulse SpecifZations. __ ......... __~_ .~._.~_._ _~__,2-24 _: ................................ Scanner Connections .................... _ .... 2-26 ..~..~.~_,..... Output Cable Connections ........................................................ 2-27 _:: _~:L_ ...... .I. .................................... ..... ..L. L.~.~ Voltage Test Connections ; ............ : ................ L .. _~_ ___ ___ _____. _ 2-28 __ : ................. 2-l'& Resistor Test Connections ............ __ __ .. ..:-..2-2 9 .Lz ............. :. ................................. 4-P&? Resistor Test Connections. ....... 2-35 L_... L.; ........ ............................................... Amplifier Gain Test Configuration. __ ......... 2-36 .................................... Amplifier Frequency Response Test Configuration 2-39 Using Scanner Card with Nanovoltmeter ............................................................
SECTION 3-IEEE-488
3-l 3-2 3-3 3-4 3-5 3-6 37 3-8 3-9 3-10 3-n 3-12
Programming
_ _. _ _ ___ _ 3-2 3-4 . .~. ._ : . . . _. . .~. _. .~_.~_~_ _ _. _ . . _ _ __3-4 . ,. . .~. . . _. _. . _. . 3-5 ~_.__. _ . . . . . . ^_.... I._ .___. _L _________..,___. 3-5 ... . . . t _ .._ 3-22 . ~ _. _. . . 3-23 . .,.... ~..~ .,.,.. . . . . .. . . . . __ ________ ~-~3-26 . .._... ^_I..~ . . . . . . . _._____ ____..___.. ~,_-I_ 3-27 .~. . .~. .~.. : . ; .~. 1_.~~.3-42 ., . . . 3-43 .`. _ _`. ._~. .`I 1. 1.`. 1 _ I _ 1.. _`_. _ _,_, _ _ _`_ 346 1. . .~. .
Typical Program Flow Chart _. .~.~. .~_. .~. . IEEE-488 Connector _ :Y: .: .~. ._ IEEE-488 Connections .. .. .. .. . _ IEEE-488 Connector Location. .~. . . .~.. _. . ContactAssignments _____._._r.~.__...~ _.._ _.__ _ I______ General Dat Format . . . _ . . SRQ Mask and Serial Poll Byte Format .~. :_ UO Machine Status Word and Default Values . ..__. UlErrorStatusWord . . . . ..___......_._........... ^ 2-l'& Resistor Test Connections : . . .~. .~; : 4-P& Resistor test Connections .+; .;. _ Amplifier Gain Test Configurations I 1':. _~_ 1 .
SECTION 4-Performance
4-l 4-2 4-3 44 4-5 4-6 Connections Connections for for Connectionsfor Connectionsfor Connections for Connections for
Verification
DC VoltsVerification . . . . . . . . . ..___ I __________.___._._ 1 _____ _ ..___-._ ~_~ ~...~4-2 ._.,_ TRMS AC Volts Verification.. :`. :. , . _. . I~. . . . .~. . . __ _. 4-3 Ohms Verification (300%3Ok0 Range). . . . 4-4 Ohms Verification (300kil-3OOM0 Ranges) . .~..~. . 4-4 DC Current Verification _ . _ . . _. .. , 4-5 TRMS AC Current Verification .~. . . 4-5
vii
SECTION t&-Principles
5-l 5-2 5-3 5-4 5-5 5-6
of Operation
&&all Block Diagram . _ __. ~.,,- __ .._ .~~II_ _:*,. I;-.,. _ . :. . . . *.. ., .,_ <:I, i _ . . i:. . . . _ _ . _; :; 5-2 _ _. i Input Configurati& During 2 and 4-terminal Resistance~Measurement, . _ _.. . . _ _ . _ _ _ _. I _ . . . _. S-4 ~: ResistanceMeasurementSimplIfiedCircuitry _....._, _ _.__....__..... Lji,.i__.j .___. ii:....i~rl.`.l',~;. 5-5 JFET MuliipIexer . . . . . . _ . . . __,_,__,___ ,__ . . . . .~.~. _. _. _ _,_<.<,,I * .~_2 . _ _ i,,. .' .:;: i ii i `2% :`i:~. 5-6 . : MultiplexerPhases _........._,._ _ ,.__. ___~_~.~~,ll~.~.__~I.._..___._. j _...._ \~..> . . . . . . . ..____. . . . . . . . . ~.. 5-7 A/D Conveitei Simplified Schematic. _ .. . . _ _ _ . . . _ . . . _. . . ,. _ _ ;. . . _~~. I . , . _ _ 5-9 ,,
SECTION 6-Maintenance
DCVoltsCalibrationConfiguration(3CQmV~nge) __..____..._ `I.... ,.=. . . ...1.-.* __,. L_i.l~i .___ -.~.;....6-6~ t-i 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 _. TRMS AC Volts Call&ration Configuration . ~_ , _. _,__. __ ..,_,, __ __,_ i .,,. _,,.: . .i . . .,.. .`. Y. : I .' 6-10 _ I,. 6-6 6-7 TRMS AC Volts High Frequency Calibration, &ljustments (30V and 3OOv, Ranges) . . . _. . . . 6-11 6-12 DCCurrentCalibrationConfiguration..'.. ..__ _..._.___...___.._ *.___ ___....___.._.._...._ -..--;_.:. 6-B 6-9 ~~ACCur?entCalibrationConfiguration .._... _ __.._ ________,..__ _.l~l_____i_~__.l_~._.;~.j~~_.j~.yl~..j_ ._... 6-13 Model 199 Exploded View . . _. . . . ~.. ._.___ _ __._, . _ _ . ._~_ _ . , I . . i. _ ;. . _ . . _ . 6-15 6-10 6-n Connector Locations.. .. ... ..~. ...__.i,. e,m..i ..,.._. ..~.__. . _.. . ._... . ..~ . . . . .~*..i.. . . . .~_. 6-16 6-12 Scanner Installation . . . . _ =_..I.DI, i._m.v~_,,L I L Z:. : `_`.i~i_ ;`:`YYI: ,: `. ; :. . zi ,Y,18.=.. I; .`:. I':`: .., :".`.r. 1".:6-24 6-13 Scanner ConneCtor Location _ _ YL.. _ ij ._ . _ .~(_ _ _. _ _ _. . , _~.~*. _.z~. _ __ ___&. ;~. . ._.. __ . :. 6-25 =_
SECTION 7-Replaceable
parts
APPENDIX
C-l c-2 c-3
C-IEEE-488
BUS OVERVIEW
~-~.-,.~~-~.,I~;~-I.C~l .~...?._ _,. _~: _:I C-3 `-. _ ;.`;.. . .,. <_,;.`~A . C-6 _
IEEEBusCoiifiguration .._..... :..L ._._I, .~*..,.~...: ___.__._ ~..; .__..__.__.________._ IEEE Handshake Sequence __ ~~~. : ;. _ _ _ _ _ _,_,;-.LLu,.,. ,_/,_~. + ,,_,. .. __ . i i _,: .I_, G Command Codes. L. L. _ . . _ _ _~i~.i_ _ . i .~,,A ."L :_ii___ . `P,:: , _~j_,.~.. `r. ;`. :`-:: :".
List
Of
Tables
SECTION 2-Basic
2-l 2-2 2-3 2-4 2-5 2-6 2-7
DMM Operation
Factory Default Conditions. .~.1 , _~. . _. ___ . __:-_ _ _ _ _ _.,__ _ . __ _ _ __ ., _. 2-2 _._ Error Messages _: .z.. _ . _ _ _ , ..* _ . . .,. . _ _ _ . 2-6 Resistance Ranges .~_ _~. ~., _~~,~_, .~_ . . .~. . . . ~_. . _ .. . . . _ . . __ _ _. 2-11 Corresponding Voltage Reference Levels for Impedance References.. . ,~._~. _,. . _. _ _ __ _ _ _~. _ .~ 2-14 _ Comparison of Average and TRMS Meter Readings _ _. _, ..._........ . _. __ __. 2-15 DMM Setup Programs _ _ _ . . . _ . __ _ . ,~. . .~, ;. r _. . _ .~. .~ _ .~_ 2-16 Typical Minimum Usable Scan Intervals .~_ .~.~. . ....,_ _ __ .._ . .._.,___ 2-38
SECTION 3-IEEE-488
3-l 3-2 3-3 3-4 3-5 56 3-7 3-8 3-9 3-10 3-11 3-Y 3-w 3-14 3-15 3%
Progamming
IEEE-488 Commknds USed to Select Function and Range. . . , _ . _.. . . _ . . . 3-3 JEEEContact Designations...: . . . .~; . ~;~:~;::.~ . . . . . . . :: .~..;..: . . . .._............ . . . . ..I . . ~::~ . . . . 3-5 . Model 199 Interface Function Codes . . _~_ .~. . . ~. . . . _~_._ __ _ .. . _ . 3-6 BASIC Statements Necessary to Send Bus Commands. _ . .~. . . . . . _ . _. . . _ . . . .~_. . . 3-7 Front Panel IEEE-488 Messages. . . _~.~~_ ~ ,.~.__,. _. _ __ _.. _ _ _ _ __ __ _ . 3-8 General Bus Commands and Associated BASIC Statements , .,. . . _., , __ _ _ _ _ _ _. _ _. . . . . . , _ . 3-10 FactoryDefaultConditions ____..._._.... .__._..._._ jj ____._......_.._...__ _~ t________....... ~..~ . . . 3-11 . Device-Dependent Command Summary .~_.. _ _ . _ __ _ _ .;,. __,. _ _. _ . . _ . .~. 3-14 Range Comniand Summary . _~_ ,. . .,~_~_ _ _ _ __ _ _ _>_. 3-17 Rate Command Summary.. ..~. . _. _.._... .._. ..~. . . .~.. . _. .. . . . . . 3-li3 SRQ Command Parameters . _~ _~_ .~_, . . . , . _. . . . . __ . __. ____ 3-23 3-25 Bus Hold-off Times (Typical) . _ _~~_ .~._ , . _ __ _ _ _~_ _ I . __ _ _ . _ . _ _ . _ _ _ . _ ~_~L _ ______ Translator Reserved Words and Character . . .. 330 Translator Error Messages . . . __ , . _ . .~. .~. . . . . _ . _.. _, .... _. I 3-32 TypicaITriggertoFirstByteOutliies __. . ...,,.. ~1.__...,..__.__ I____ I.... Y;;.:....,. _ ._.__...__ 336 3-37 Scanner Programming Commands. _ . _ . I _~ _ _ _ _ _ . _.._ _ _ . L _ . . . _.. . _,. _. . __
.~~
SECTION 4-Performance
4-l 4-2 4-3 4-4 4-5 4-6
Verification
_ _ _ _ __ _ __ _ _ _ _ . ~ I in. I~ _ _~~_~. _ _ _. _ __ , _ _ _ _,. .,_% . _. _~_ ,.,." iia.l . . . . . .,,. .,_. _i _ _~_,_,. __,_ .~_ .~_ _. _ =_, . . . ,::. .lI.. ,~. . _ .,_. _ . . . . . . . . _ ________....SC...~l~ _,,,._j___._._ Liil..___l`L .... . . . . . . . . . . . . . . . . . .._. _..,... ~. . . ,,.. . . . . .._. i_ . . . . . .~._~_ _ . . __ . . . _. _ . __ ~.~_. . _. _. .~, _. 4-1 4-2 4-3 44 4-4 4-5
Recommended TZ+s Equipment Liits for DC Volts Verification.~. Limits for TRMS AC Volts Verification LiitsforOHmsVerification _.___.._. Limits for DC Current Verificatidn. Limits for AC Current VeriFication.
SECTION 5-Principles
5-l Input Buffer Ampliiier
of Operation
(U46) Gain Configtiration . .`. . _. _ . . _ _ . .. . . . . 5-8
ix
SECTION 6-Maintenance 6-l
6-2 6-3 6-4 6-5 6-6 6-7 6-8 6-9 6-10 6-11 6-12 6-13 6-14 645 6-l . ...... _, .......................................................... line Voltage Selection .............. 6-2 Line Fuse Replacement ............................................................................ _ ... 6-2 1 ......... Current Fuse Replacement ......................................................... 6-3~ L.. I.. ... .~,_ : ....................................... Recommended Calibration Equipment .......... I .... I ... , ... , 6-6 _~~_~_ ................................. DC Volts Calibration ......................... 1 ~6-8 ,~....................... Resistance Calibration ........................................................ 6-9 TRMS AC Volts Calibration ..................................................................... L_. ....... .. ... . . 6-1.2 DC Current Calibration ............................................................ 6-13 TRMS AC Current Calibration .................................................................. 6-18 Recommended Troubleshooting Equipment ........................................................ .. - .... ~.-~.~ 6-19 _. ....... _~ ...... ~,-^~. ......... ........................ ~ModelWTroubIeshootingMode 6-21 _.~.~ ..... . ... .I ......................................... Power Supply Checks ................... 6-21 , ....... Digital Circuitry .Checks ....................................................................... 6-22 Display Circuitry Checks ......................................................................... 6-22 ......... ..~................~....................~ ScannerBoard Checks ......................
APPENDIX
C-l c-2 c-3 C-4 c-5
C-IEEE-488
BUS OVERVIEW
. ._ . ... .,. .~. . . _1_ . . ~..~_ _~. _~. ; . _,. _. . . . . . . L .._ C-3 C-7 C-7 C-7 C-7
IEEE-488 Bus Command Summary _ _~. Hexadecimal and Decimal Command Codes __ . . Typical Addressed Command Sequence : .~.: .~.~1. . Typical Device-Dependent Command Sequence I _~ IEEE Command Group.. . . .~ .~.~, _~_
.
.~;.~.
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 resolution, 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 titerface 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.
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 exercise 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 service of your instrument may be directed to the applications engineer at any of these locations. Check the inside front cover for addresses.
In addition to the above mentioned measurement capabilities, the Model 199 can make ACTdB voltage and current measurements.
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 attempting to operate or service the instrument.
1.2 FEATURES
Some important
l
Model 199 features
include:
10 Character Alphanumeric Display-Easy to read 14 segment LEDs used for readings and front panel
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 safety 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.
messages.
l l
Zero-Used to cancel offsets or establish baselines. Data Store-Can store up to 500 readings and is accessible over the bus or from the front panel. Digital Calibration-The instrument may be digitally calibrated from either the front panel or over the bus. User Programmable Default Conditions-Any instrument measurement configuration can be established as the power-up default conditions. Translator Software-User defined words (stored innonvolatile memory) can be used to replace standard command strings over the IEEE-493 bus.
l
l
l
l-1
GENERAL INFORMATION
1.6 SPECIFICATIONS
Detailed Model 159 specifications may be found preceding the Table of Contents of this manual.
* Section 6 contains information for servicing the instrument. `Ihis section includes information on fuse replacement, line voltage selection, calibration and troubleshooting. l Section 7 contains replaceable pats information.
1.7 INSPECTION
The Model 199 System DMM was carefully inspected, "th electricalIy and mechanically before shipment. After Unpacking all items from the shipping carton, check for any obvious signs of physical damage that may have occurred during transit. Report any damage to the shipping agent. Retain and use the original packing materials in case reshipment is necessary, The following items are shipped with every Model 159 order: Model 199 System DMM Model 199 Instruction Manual Safety shrouded test leads (Model 1751). Additional accessories as ordered.
1.9 GETTING
STARTED
The Model 199 System DMM is a highly sophisticated instrument with many capabilities. To get the instrument up and running quickly use the following procedure. For complete information on operating the Model 199 consult the appropriate section of this manual.
Power up 1. Plug the line cord into the rear panel power jack and plug the other end of the cord into an appropriate, grounded power source. See paragraph 22.1 for more complete information. 2. Press in the POWER switch to apply power to the instrument. The instrument will power up in the 3WV DC range.
If an additional instruction manual is required, order the manual package (Keithley Part Number 199-901-00). The manuai package includes an instruction manual and any~ applicable addenda.
Making
Measurements
1.8 USING THE MODEL 199 MANUAL
This manual contains information necessary for operating and servicing the Model 199 System DMM. The information iS divided into the following sections:
1. Connect the supplied safety shrouded test leads to the front panel VOLTS HI and Lo input terminals. Make sure the INPUT switch on th-e front panel is in the front position. 2. To make a voltage measurement, simply connect the in~.~rrufleads to a DC voltage source (up to 30OV) and take ihe reading from the display. 3. To change to a different measuring function, simply press the desired function button. For example, to measure resistance, press the OHMS button.
l
l
l
Section 1 contains general information about the Model 199 including that necessary to inspect the instrument and get it operating as quickly as possible. Section 2 contains detailed operating information on using the front panel controls and programs, making connections, and basic measuring techniques for each of the available measuring functions. Section 3 contains the information necessary to connect the Model 199 to the IEEE488 bus and program operating modes and functions from a controller. 4 contains performance verification procedures for the instrument. Thii information will be helpful if you wish to verify that the instrument is operating in compliance with its stated specifications. Section 5 contains a description of operating theory. Analog, digital, powei supply, and IEEE-488 interface operation is included.
Using DMM
Setup
Press SHIFT DMM SETUF, then use NEXT to scroll through selections. The following can be selected or viewed:
l l l l l l l l
l Section
Software revision MUX on/off IEEE-1188 address Line frequency save setup LED test Diagnostics unit reset
l
l-2
GENERAL INFORMATION
For all selections except software revision and IEEE488 address, use uprangeidownrange to toggle the selection.
phone tips (0.06 DIA.), two hooks and miniature alligator clips (with boots). Model 1992 4/8 Channel Scanner-The Model 1992 Scanner option allows scanning of four, 4-pole channels, or eight, 2-pole channels. The Model 1992 installs within the Model 199 with connections available on the rear panel of the instrument. Model 1993 Quick Disconnect Scanner Connector KitThe Model 1993 includes two connector blocks, 10 tie wraps, and two sets of red and black output cables for~the Model 1992 Scanner Card. Model 1998 Rack Mounting Kit-The Model 1998-l Single Fixed Rack Mounting Kit mounts a single Model 199 in a gandard 19 inch rack. The Model 1998-2 Dual Fied Rack Mounting Kit mounts two Model 199s side by side in a standard 19 inch rack. Model 5806 Kelvin Clip Lead Set-The Model 5806 includes two Kelvin clip test lead assemblies with banana plug termination (one red, one black). A set of eight replacement rubber bands for the Model 5806 is also available (Keithley PIN GA-22). Model 7007 IEEE-488 Shielded Cables-l-he Model 7007 connects the Model 199 to the IEEE-488 bus using shielded cables to reduce electromagnetic interference @MI). The Model 7007-1 is one meter in length and has a EMI shielded IEEE-488 connector at each end. The Model 7007-2 is identical to the Model 7007-1, but is two meters in length. Model 7008 IEEE488 Cables--The Model 7008 connectsthe Model 199 to the IEEE-488 bus. The Model 7008-3 is 0.9m (3 ft.) in length and has a standard IEEE-488 connector at each end. The Model 7008-6 cable is identical to the Model 7008-3, but is 1.8m (6 ft.) in length.
Pa'a~;p~~p,provides
the detailed information
for using
1.10 ACCESSORIES
The~following accessories 199 capabilities. are available to enhance Mode1
Model 1651 SO-Ampere Current Shunt--The Model 1651 is an external O.oOlQ *l% 4-terminal shunt, which permits ~~ current measurements from 0 to 5OA AC or DC. Model 1681 Clip-On Test Lead Set-The Model 1681 contains two leads, 1.2m (4 ft.) long terminated with banana plugs and spring action clip probes. Model l682A RF Probe-The Model 1682A permits voltage measurements from 1oOktrz to 25OMH.z. AC to DC t&&r accuracy is *ldB from 1OOkHz to 25OMHz at IV, peak responding, calibrated in RMS of a sine wave. Model 1685 Clamp-On AC Probe-The Model 1685 measures AC current by clamping on to a single conductor. Interruption of the circuit is unnecessary. The Model 1685 detects currents by sensing the changing magnetic field produced by the current flow. Model 1751 Safety Test Leads-Finger shrouded banana plugs help minimize making contact with live circuitry. guards and the chance of
Model I754 Universal Test Lead Kit-The Model I754 is a 12 piece test lead kit, with interchangeable plug-in accessories. Induded in the kit is one~set Of test leads (l-red, l-black), two spade lugs, hvo standard banana plugs, two
l-3/1-4
SECTION
2
Basic DMM Operation
2.1 INTRODUCTION
Operation of the Model I.99 can be divided into two general categories: front panel operation and IEEE-188 bus op~ation. This section contains information necessa?y to use the instrument from the front panel. These functions can also be programmed over the IEEE-488 bus, as described in Section 3. CAUTION Be sure that the power line voltage agrees with the indicated range on the rear panel of the instrument. Failure to observe this precaution may result in instrument damage.
2.2.2 Power Up Sequence
The instrument can be turned on by pressing in the front panel POWER switch. The switch will be at the i&w most position when the instrument is turned on. Upon power up, the instrument wiIl do a number of tests on itself. Tests are performed on memory (ROM, RAM and E'PROM). If RAM or ROM fails, the inshument will lock up. If E*PROM FAILS,the message "UNCAL" will be displayed. See paragraph 6.7.2 for a complete description of the power up self test and recommendations to resolve failures.~
2.2 POWER UP PROCEDURE
2.2.1 Line Power
Use the following procedure to connect the Model 199 to line power and power up the instrument. 1. Check that the instrument is set to correspond to the available lie power. When the instrument leaves the factory, the externally selected line voltage is marked on the rear panel. Ranges are 105WZ5V or 21OV-25OV 50/6OHz AC (9GllOV, 180~220V with optional transformer). If the line voltage setting of the instrutitint needs to be changed, set switch as required. If the line frequency setting of the instrument needs to be checked and/or changed, utilize fro