Keithley 6485, User Manual

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Model 6485 and 6487 User’s Manual Example Programs C-3
900 readings/second to IEEE-488 bus
This program uses multiple reading queries to get high speed measurements over the bus
in real time. To improve continuity of readings, reduce the trigger count. To improve
throughput, increase the trigger count.
NOTE This program configures the Model 6485/6487 to 0.01 PLC, digital filters off,
front panel off, auto-zero off, binary transfer, and IEEE-488.1 (language).
Model 6485/6487 must be set to IEEE-488.1 operation from the front panel.
Press CONFIG then COMM, select LANG: 488.1, then press ENTER. See
instruction or reference manual for details.
*RST ' Return 6485/6487 to RST defaults.
FORM:ELEM READ ' Return readings only.
FORM:BORD SWAP ' Set for swapped byte order.
FORM:DATA SRE ' Return single precision floating.
' point binary.
TRIG:DEL 0 ' Set trigger delay to zero seconds.
TRIG:COUN 8 ' Set trigger count to 8.
NPLC .01
' Set integration rate to .01 PLC.
RANG .002 ' Use 2mA range.
SYST:ZCH OFF
' Turn zero check off.
SYST:AZER:STAT OFF ' Turn auto-zero off.
DISP:ENAB OFF ' Turn display off.
*OPC? ' Operation complete query
' (synchronize completion of commands).
read back result of *opc?
for i = 1 to 1000
"talk" Model 6485/6487.
' In 488.1 mode this will
' automatically do a READ?
' (see Reference manual).
read back the binary data
next i
DISP:ENAB ON ' Turn display back on.