Model 6220/6221 User’s Manual Delta, Pulse Delta, and Differential Conductance 5-41
Return to Section 5 topics
The following query command is used to return the response to a query
command sent over the serial port:
SYSTem:COMMunicate:SERial:ENTer?
When communicating over the serial port, there are no errors reported if a
Model 2182/2182A is not connected to the serial port.
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 “Measurement units” on page 5-11 for details). The
commands to set measurement units are listed in Table 5-1. The following
example shows the command to select conductance (Siemens) measure-
ment units:
5. Set up, arm, and run Differential Conductance – Details on the com-
mands to set up and arm Differential Conductance are provided in Table 5-4.
The following demonstrates the proper command sequence to set up, arm,
and run Differential Conductance for the Example in Figure 5-10:
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 S ‘ Select Siemens measurement units.
*RST ‘ Restores 622x defaults.
SOUR:DCON:STARt 0 ‘ Sets start value to 0µA.
SOUR:DCON:STEP 10e-6 ‘ Sets step size to 10µA.
SOUR:DCON:STOP 50e-6 ‘ Sets stop value to 50µA.
SOUR:DCON:DELTa 20e-6 ‘ Sets delta value to 20µA.
SOUR:DCON:DELay 1e-3 ‘ Sets delay to 1ms.
SOUR:DCON:CAB ON ‘ Enables Compliance Abort.
TRAC:POIN 6 ‘ Sets buffer size to six points.
A
SOUR:DCON:ARM ‘ Arms Differential Conductance.
INIT:IMM ‘ Starts measurements.
B
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