5-18
Delta, Pulse Delta, and Differential Conductance
Model 6220/6221 User’s Manual
Return to
Examples
– The following commands demonstrate proper syntax for
sending commands and returning responses to queries over the serial port:
4.
Set measurement units
– Volts are the default units for the Model 622x
but can instead be expressed (and displayed) as an Ohms, Watts, or Sie-
mens reading (see “
” on
for details). The commands to set
measurement units are listed in
. The following example shows
the command to select ohms measurement units:
5.
Set up, arm, and run Delta
– Details on the commands to set up and arm
Delta are provided in
. The following example demonstrates the
proper sequence to set up, arm, and run Delta:
A.
Trace points specifies the size of the buffer. Buffer size should be the same
value as Delta count. See
for details on all buffer commands.
B.
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.
SYST:COMM:SER:SEND “VOLT:RANG 2”
‘
‘
Select 2V range for 2182/
2182A.
SYST:COMM:SER:SEND “VOLT:RANG?”
‘ Send range query.
SYST:COMM:SER:ENT?
‘ Return response to query.
SYST:COMM:SER:SEND “VOLT:NPLC 1”
‘
‘
Set rate to 1PLC for 2182/
2182A.
SYST:COMM:SER:SEND “VOLT:NPLC?”
‘ Send rate query.
SYST:COMM:SER:ENT?
‘ Return response to query.
UNIT OHMS
Select ohms measurement units.
*RST
‘ Restores 622x defaults.
SOUR:DELT:HIGH 1e-3
‘ Sets high source value to 1mA.
SOUR:DELT:DELay 100e-3
‘ Sets Delta delay to 100ms.
SOUR:DELT:COUN 1000
‘ Sets Delta count to 1000.
SOUR:DELT:CAB ON
‘ Enables Compliance Abort.
TRAC:POIN 1000
‘ Sets buffer to 1000 points.
A
SOUR:DELT:ARM
‘ Arms Delta.
INIT:IMM
‘ Starts Delta measurements.
B
Summary of Contents for 6220 DC
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Page 36: ...1 20 Getting Started Model 6220 6221 User s Manual Return to Section 1 topics...
Page 131: ...6 10 Averaging Filter Math and Buffer Model 6220 6221 User s Manual Return to Section 6 topics...
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