Keithley 2002 User Manual

IEEE-488 Reference
3-147
3.22 :TRACe subsystem
The commands in this subsystem are used to configure and control data storage into the buffer.
The commands are summarized in Table 3-14. See paragraph 2.8 for more information about
the buffer.
:TRACe|:DATA
The bar (|) indicates that :TRACe or :DATA can be used as the root command for this subsystem.
From this point on, the documentation in this manual uses :TRACe. If you prefer to use :DATA,
simply replace all the :TRACe command words with :DATA.
:CLEar
:TRACe:CLEar Clear buffer
This action command is used to clear the buffer of readings. If you do not clear the buffer, a
subsequent store will overwrite the old readings. If the subsequent store is aborted before the
buffer becomes full, you could end up with some “old” readings still in the buffer.
PRINT #1, "output 16; :trac:clear" ' Clear buffer
:FREE?
:TRACe:FREE? Read status of memory
This command is used to read the status of storage memory. After sending this command and
addressing the Model 2002 to talk, two values separated by commas are sent to the computer.
The first value indicates how many bytes of memory are available, and the second value indi-
cates how many bytes are reserved to store readings.
PRINT #1, "output 16; :trac:free?" ' Query status of memory
PRINT #1, "enter 16" ' Get response from 2002
:EGRoup <name>
:TRACe:EGRoup <name> Specify element group
<name> = FULL Time stamp included with each stored reading
COMPact Time stamp not included
:EGRoup? Query element group
This command is used to select the element group that is sent with each reading. Common to
both element groups are function, channel (if applicable) and buffer location. The FULL ele-
ment group includes the time stamp. The first reading in the buffer has a time stamp of 0 sec-
onds. The time stamp for all subsequent readings are then referenced to the first reading.
The COMpact element group excludes the time stamp. This allows more readings to be stored
in the buffer (see :POINts).
PRINT #1, "output 16; :trac:egr comp; egr?" ' Select compact element group
PRINT #1, "enter 16" ' Get response from 2002
3.22.1
Description
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3.22.2
Description
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3.22.3
Parameters
Query
Description
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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