Keithley 263 User Manual
Model 263
Quick Reference Guide
Calibrator/Source
INTRODUCTION
This quick reference guide contalne descriptions of parlous
features and Information concerning the operation of the
Model 283. Also included are programming examples using
VBrlous COntr011wa.
Q1997, Keithley Instruments. Inc.
Instruments Division
Document Number: 283-903-01 Rev. A
Cleveland. Ohio, U.S.A.
TABLE OF CONTENTS
SAFETY PRECAUTlONS 3
FRONT PANEL OPERAflON 4
CONNECTORS IRear Panell.. 9
PROGRAMMING OUTPUT VALUES 10
SOURCING METHODS 11 ; ~
GUARD 13 ‘~I
FRONT PANEL PROGRAMS. 16 i
IEEE-488 PROGRAMMING.. 17
PROGRAMS 23
IBM PC or AT ICEC PC < > 488 Interface1 24
IBM PC or AT ,National GPIS PC Interface,. 26
APPLE II 28
HP85................................ 30
HPSERlES300and.9816 ,,,,,,,,,,,,,.,,, 32 ; j I
HP9925A............................. 34 :
DECLSIll ,...,,.,,,,,,,,,,,o,,,,.,,, 36 i ,! _
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SAFETY PRECAUTIONS
1. Before operation, ground the instrument through a properly earth grounded power receptacle.
2. Before sevlcing, disconnect the instrument from the
power line and all other equipment, and consult the Model
263 InstructIon Manual.
3. Do not touch any terminals while the Instrument Is oonnectsd to any other test equipment.
3
FRONT PANEL OPERATION
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POWER-Controls AC line power to the instrument.
SHIFT-Several controls have secondary functions that are
selected by first pressing SHIFT and then pressing the ap- 1 :
propdate button.
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FUNCTION GROUP
FUNCTION
OHM9
o=
VOLTS EX
OmH
AMPS
f=-l
OYA V/R m
OB-'
OHMS-Pressing the OHMS button configures the Model
263 as a resistance source. The value of the reslstanoe will
be displayed.
VOLTS-Pressing the VOLTS button conflgures the Model
263 88 a voltage 80”~~ The voltage VBIUB will be displsyed.
Pressing SHIFT VOLTS configures the Model 263 to output
an external wurce applied to the EXT INPUT and COMMON
terminals on the rear panel. The EXT indicator turns on and
the message “USE, V” 18 displayed.
AMPS-Pressing the AMPS button configures the Model :
263 as an active current source. The programmed current
value will be dlsplayed.
Pressing SHIFT AMPS turns on the V/R light indicating that
the Model 263 is configured as a passive current aouroe.
COUL-Pressing the COUL button conflgures the Model
263 8s an active charge 8ouroe. The currently selected :
range and programmed charge value will be displayed.
Pressing SHIFT COUL turns on the VIR light indicating that
the Model 263 is configured as a passive charge source.
CONTROLGROUP
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RANGE-These two buttons are used to swleot the range
of the selected function. RANGE A upranges the Instrument and RANGE V downranges.
CURSOR-These two buttons are used to position the oursot when using the Adjust Method to modify an output
valuw. CURSOR C moves the cursor from left to right and
conversely, CURSOR 4 moves the cursor from right to left.
Not functional In OHMS.
Pressing SHIFT ON/OFF the first time displays the flashing
cursor continually. Pressing It again disables the cursor. Not
functional in OHMS.
ADJUST-These two buttons aro used to modify the display
reading using the Adjust Method. ADJUST A increments
the reading at the seleotnd dlglt and ADJUST T decrements
the reading. Not funotional in OHMS.
KEYPAD/ENTER-Pressing this button enables the keypad
allowing an output value to be keyed in using the number
10 through 91 buttons and the + button IKeypad Method).
Pressing this button *gain enters the resdlng and disables
the keypad. Not functional in OHMS.
SHIFT CANCEL-Pressing this button after keying in B
reading (Keypad Method) canoels that reading and disables
the keypad.
+/- Toggles the displayed reading (except OHMS1 betwsen posltlve (t) and negative l-l polarity. Not functional
in OHMS.
ZERO-Toggles the display between zero and the previously
displayed reading.
SHIFT GUARD-Toggles the output configuration between
guarded and unguarded.
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MENU-Used to Sslsot front panel program& Program
parameters are modified by the ADJUST buttons. Pressing
MENU after modifying a program parsmeter enters the new
parameter and returns the instrument to normal operation.
OPERATE-Toggles the instrument between the standby and
operate conditions.
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CONNECTORS (Rear Panel)
OUTPUT-Output high is available at this triax connector
ion the center conductor). Output low is available here Ion
the inner shield) or at the COMMON terminal depending
an the configuration of the output kmguarded or guarded).
EXT INPUT-This banana plug is used to connect an exter-
nal input (2OOV. lOOmA peak1 to the Model 2133. The ex-
ternal Input is then available at ths output of the Model 283
when VOLTS EXT is selected.
COMMON-Output low Is always avsllable at this termlnsl
regardless of the oonflguration of the output.
PREAMP OUT-This terminal along wlth COMMON can be
used to monitor the voltage drop across a load when the
instrument is sourcing current or charge. This termlnsl can
also be used as an external guard drive when sourcing
AMPS or COUL. PREAMP OUT is inoperative in AMPS V/R.
COUL V/R, VOLTS and OHMS.
IEEE CONNECTOR-Used to connect the instrument to the
IEEE-488 bus. IEEE interface functions are marked above
the connector.
AC RECEPTACLE-Power is applied through the supplied
power cord to the 3-terminal AC receptacle.
9
PROGRAMMING OUTPUT
VALUES
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For all functions, except OHMS, the following two data entry
methods can be used to program the instrument for 8” output value. In general, use the Adjust Method to modify B
value and the Kevpad Method to enter a completelv new
v.aIuB.
Adjust Method
1. Position Cursor. Using CURSOR 4 and CURSOR C, place
the cursor on the digit to be changed. To continuallv :
display the cursor location, press SHIFT ON/OFF.
2.Adjust Display Reading. Use thB ADJUST A and ADJUST
v to increment or decrement the reading. Polarity of the
reading is toggled by the +/- button.
Keypad Method
1. Enable Keypad. Enable the keypad by pressing KEYPAD/
ENTER. Keypad LED turns on.
2.Key In Reading. Key in the reading by pressing the BPpropriate number button (0 through 91 at each oursor
location. Polarity is toggled by the +/- button.
Note: If it is desired to cancel the keyed in reading and
return to the previously programmed value, press SHIFT
CANCEL. The keypad will disable.
3.Enter Reading. Again press KEYPAD/ENTER to enter the
displayed reading and disable the keeypsd. Keypad LED
turns off.
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SOURCING METHODS
Figures 1 through 6 show the basic methods that the Model
263 ums to source resistance, voltage, current and charge.
MODEL 263
_ _ _ _ _ _ - - _ _ _ - - - - - 1
Flgure 1. Ohms Source
Flgum 2. Volts Source
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