Keithley 2002 User Manual

IEEE-488 Reference
3-41
3.11 Signal oriented measurement commands
The signal oriented command group is used to acquire readings using a set of high-level instructions to control the measurement
process. These commands are summarized in Table 3-3.
Table 3-3
Signal oriented measurement command summary
Command Description
:FETCh?
:CONFigure:<function>
:READ?
:MEASure[:<function>]?
Requests the latest reading.
Places the 2002 in a “one-shot” measurement mode for the specified function.
Performs an :ABORt, :INITiate, and a :FETCh?.
Performs an :ABORt, :CONFigure:<function>, and a :READ?.
:FETCh?
This query command is used to request the latest post-processed reading. After sending this
command and addressing the Model 2002 to talk, the reading will be sent to the computer. This
command does not affect the instrument setup.
This command does not trigger a measurement. It simply requests the last available reading.
Note that this command can repeatedly return the same reading. In the absence of a new reading,
this command will simply return the old reading. If your application requires “fresh” readings,
use the :DATA:FRESh? command (see SENSe Subsystem).
This command is automatically asserted when the :READ? or :MEASure? command is sent.
PRINT #1, "output 16; :syst:pres" ' Select system preset defaults
PRINT #1, "output 16; :fetch?" ' Request the latest reading
PRINT #1, "enter 16" ' Get response message from 2002
:CONFigure:<function>
where: <function> = VOLTage:DC DCV function
= CURRent:DC DCI function
= VOLTage:AC ACV function
= CURRent:AC ACI function
= RESistance Ω2 function
= FRESistance Ω4 function
= FREQuency FREQ function
= TEMPerature TEMP function
:CONFigure? Query the selected function
Short-form format: :conf?
Response message: CURR:DC, VOLT:AC, CURR:AC, VOLT:DC, RES, FRES, FREQ or
TEMP
Description
Program fragment
Query

Keithley 2002 Specifications

General

Resolution	8.5 digits
DC Voltage Accuracy	±0.0006%
Maximum DC Voltage	1000 V
Maximum AC Voltage	750 V
Maximum DC Current	3 A
Maximum AC Current	3 A
Connectivity	GPIB, RS-232
DC Voltage Range	100 mV to 1000 V
AC Voltage Range	100 mV to 750 V
Resistance Range	10 Ω to 1 GΩ
Model	2002
Category	Multimeter
Interface	GPIB, RS-232
AC Current Accuracy	±0.1%
Frequency Range	0.1Hz to 300kHz
Display	VFD
Type	Digital
Power Supply	100-240V AC, 50/60Hz
Current Range (DC)	100 μA to 3 A
Current Accuracy (DC)	±0.01%
Current Range (AC)	100 μA to 3 A
Current Accuracy (AC)	±0.1%
DC Current Range	100 μA to 3 A
AC Current Range	100 μA to 3 A