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APPENDIX
C
IBM PC OR XT (KEITHLEY
MODEL
8573 INTERFACE)
The following
program sends a command string to the Model 194 from an IBM PC or XT com-
puter and displays the instrument
reading string on the CRT. The computer must be equipped
with the Keithley Model 8573 IEEE-488 Interface and the DOS 2.00 operating system. Model 8573
software must be installed
and configured
as described in the instruction
manual.
DlRECTIONS
1. Using the front panel program feature, set the primary
address of the Model 194 to 9.
2. With the power off, connect the Model 194 to the IEEE-488 interface installed
in the IBM
computer.
3. Type in BASICA on the computer keyboard to get into the IBM interpretive
BASIC language.
4. Place the interface software disc in the default drive, type LOAD"DECL", and press the return key.
5. Add the lines below to lines l-6 which are now in memory. Modify
the address in lines 1 and
2, as described in the Model 8573 Instruction
Manual.
6. Run the program and type in the desired command string. For example, to place the instru-
ment in the autorange and average modes, type in ROFlX and press the return key.
7. The instrument
reading string willthen
appe&.on
the display. Fir example, the display might
show NDCV+l.Z345E+O.
8. To exit the program,
type in EXIT at the command
prompt and press the return key.
PROGRAM
COMMENTS
.~-
Clear screen.
Find board descriptor
Find instrument
descriptor.
Set primary
address to 9.
Set timeouts.
Set REN true.
Prompt for command.
See if program is to be halted.
Check for null input.
Address 194 to listen, send string.
Define reading input buffer.
Address 194 to talk, get reading.
Display the string.
Rep'&.
Close the instrument
file.
NOTE: For conversion
to numeric variable, make the following
changes:
c-2
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