Keithley 199

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