Keithley 6220 Reference Manual page 149

Model 6220/6221 Reference Manual
4.
5.
A.
B.
Test Equipment Depot - 800.517.8431 - 99 Washington Street Melrose, MA 02176 - TestEquipmentDepot.com
Examples – The following commands demonstrate proper syntax for
sending commands and returning responses to queries over the serial port:
SYST:COMM:SER:SEND "VOLT:RANG 2"
SYST:COMM:SER:SEND "VOLT:RANG?"
SYST:COMM:SER:ENT?
SYST:COMM:SER:SEND "VOLT:NPLC 1"
SYST:COMM:SER:SEND "VOLT:NPLC?"
SYST:COMM:SER:ENT?
Set measurement units – Volts are the default units for the Model 622x but
can instead be expressed (and displayed) as an Ohms, Watts, or Siemens
reading (see "Measurement units," on page 5-16
mands to set measurement units are listed in
example shows the command to select ohms measurement units:
UNIT OHMS
Set up, arm, and run Delta – Details on the commands to set up and arm
Delta are provided in Table
proper sequence to set up, arm, and run Delta:
*RST
SOUR:DELT:HIGH 1e-3
SOUR:DELT:DELay 100e-3
SOUR:DELT:COUN 1000
SOUR:DELT:CAB ON
TRAC:POIN 1000
SOUR:DELT:ARM
INIT:IMM
Trace points specifies the size of the buffer. Buffer size should be the same
value as Delta count. See
The initiate command starts Delta readings. After the specified finite num-
ber of Delta readings are performed, Delta will stop running. At this point
another initiate command will re-start Delta. New Delta readings will over-
write the old Delta readings in the Model 622x buffer.
If the INFinity count is set, Delta will run continuously. If the buffer fills,
Delta readings will stop being stored, even though Delta continues to run.
Return to
Delta, Pulse Delta, and Differential Conductance 5-29
Table
Select ohms measurement units.
5-3. The following example demonstrates the
' Restores 622x defaults.
' Sets high source value to 1mA.
' Sets Delta delay to 100ms.
' Sets Delta count to 1000.
' Enables Compliance Abort.
' Sets buffer to 1000 points.
' Arms Delta.
' Starts Delta measurements.
Section 6 for details on all buffer commands.
Section 5 topics
' Select 2V range for 2182/
2182A.
' Send range query.
' Return response to query.
' Set rate to 1PLC for 2182/
2182A.
' Send rate query.
' Return response to query.
for details). The com-
5-1. The following
A
B