Keithley 2002 User Manual

IEEE-488 Reference
3-151
This command is used to select the buffer control. With NEVer selected, storage into the buffer
is disabled. After cycling power, NEVer is selected. With any of the other selections, storage is
performed as long as buffer feed is not set for NONE (see :TRACe:FEED NONE). When
NEXT is selected, the storage process starts, fills the buffer and then stops. The buffer size is
specified by the :POINts command.
When ALWays is selected, the storage process starts and continues to store readings even after
the buffer fills. After the buffer fills, readings overwrite the previously stored readings.
When PRETrigger is selected, the buffer stores readings continuously (like ALWays) until the
programmed pre-trigger event occurs. When the pre-trigger event occurs, the section of the
buffer specified for post-trigger readings fill with new readings. The storage process stops when
the post trigger portion of the buffer becomes full with new readings (see
:TRACe:FEED:PRETrigger).
PRINT #1, "output 16; :trac:feed:cont next; cont?" ' Fill buffer and stop
PRINT #1, "enter 16" ' Get response from 2002
:DATA?
:TRACe:DATA? Send buffer readings
When this command is sent and the Model 2002 is addressed to talk, all the readings stored in
the buffer are sent to the computer. The format that readings are sent over the bus is controlled
by the :FORMat subsystem.
PRINT #1, "output 16; :trac:data?" ' Read entire buffer
PRINT #1, "enter 16" ' Get readings from 2002
:TSTamp:FORMat <name>
:TRACe:TSTamp:FORMat <name> Select timestamp format
<name> = ABSolute Reference to first buffer reading
DELTa Time between buffer readings
:FORMat? Query timestamp format
This command is used to select the timestamp format for buffer readings. With ABSolute
selected, each timestamp is referenced to the first reading stored in the buffer. With DELTa
selected, timestamps provide the time between each buffer reading. See paragraphs 3.14
(:FORMat: ELEMents) and 3.21.14 (:SYSTem:TSTamp) for more information.
PRINT #1, "output 16; :trac:tst:form delt; form?" ' Select DELTa timestamp and
query
PRINT #1, "enter 16" ' Get response from 2002
Description
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3.22.6
Description
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3.22.
7
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