12-2
SCPI Signal Oriented Measurement Commands
Model 6485 Picoammeter Instruction Manual
The signal oriented measurement commands are used to acquire readings. You can use
these high level instructions to control the measurement process. These commands are
summarized in
.
NOTE
The readings acquired by these commands depend on which data elements are
selected. (See
A) CONFigure[:<function>]
Configure Model 6485 for “one-shot” measurements
<function>
=
CURRent[:DC]
Configure current
This command configures the instrument for “one-shot” measurements. Each subsequent
READ? command will then trigger a single measurement and acquire the reading (see
READ? for details).
If the instrument is in idle, this command will execute immediately. If the instrument is not
in idle, execution of the command will execute when the operation returns to the idle state.
When this command is executed, Model 6485 will be configured as follows:
•
The specified function is selected.
•
All controls related to the selected function are defaulted to the *RST values.
•
The event control sources of the trigger model are set to immediate.
•
The arm and trigger count values of the trigger model are set to one.
•
The delay of the trigger model is set to zero.
•
Model 6485 is placed in the idle state.
•
All math calculations are disabled.
•
Buffer operation is disabled. A storage operation presently in process will be
aborted.
•
Autozero is enabled.
This command is automatically asserted when the :MEASure? command is sent.
Table 12-1
Signal oriented measurement command summary
Command
Description
Ref
CONFigure[:<function>]
CONFigure?
FETCh?
READ?
MEASure[:<function>]?
Places Model 6485 in a “one-shot” measurement
mode. <function> = CURR[:DC]
Queries the selected function. Returns ‘CURR’.
Requests the latest reading(s).
Performs an INITiate and a :FETCh?.
Performs a CONFigure:<function>, and a :READ?.
A
B
C
D
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