5-8 Return to Section Topics 6517B-900-01 Rev. A / Jun 2008
Section 5: Remote Operation Model 6517B Electrometer User’s Manual
SCPI signal-oriented commands
Signal-oriented commands are used to acquire readings using a set of high-level instructions to
control the measurement process. The two most commonly used commands are :FETCh? and
:MEASure?.
Details on all signal-oriented commands are covered in Section 14 of the Reference Manual.
:FETCh?
This query command is used to request the latest post-processed reading. After sending this
command and addressing the Model 6517B to talk, the reading will be sent to the computer. This
command does not trigger a measurement, it simply requests the last available reading.
:MEASure[:<function>]?
In general, this command places the instrument in the “one-shot” measurement mode (ARM
indicator off), triggers a single measurement, and then performs a :FETCh? command.
If you include the measurement function with
this command, the instrument will first go to the
specified function and then perform the one-shot measurement and query, as follows:
:MEASure? Currently selected function
:MEASure:VOLTage[:DC]? Volts function
:MEASure:CURRent[:DC]? Amps function
:MEASure:RESistance? Ohms function
:MEASure:CHARge? Coulombs function
SCPI subsystem commands
Detailed information on all SCPI commands is covered in Section 14 of the Reference manual. In
this section, only the commands used for basic operation are summarized.
Defaults
:SYSTem SYSTem subsystem
:PREset Set th
e 6517B to the system preset defaults. Some of the
selected defaults include: volts, continuous triggers, normal
speed (1.0 PLC), and auto range.
:POSetup <name> Selec
t power on setups: RST, PRESet, or SAV0 through SAV9.
Instrument will power up to the *RST or system present
defaults, or one of the *SAV0 – *SAV9 setups.
Fresh readings
[:SENSe[1]] SENSe subsystem
:DATA:FRESh? Request
s a new reading. This command will not request the
same reading twice. If a new reading has already been
triggered, this command will wait until the new reading is
available.
:CALCulate[1] CALCulate subs
ystem
:DATA:FRESh? Req
uests a new calculated reading. When CALC1 is enabled,
SENS:DATA:FRES? is the reading before calculation and
CALC:DATA:FRES? is the reading after calculation. When
CALC1 is disabled, the readings are the same.
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