Keithley 199 Instruction Manual page 17

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