Keithley 2600a series User Manual

2600AS-901-01 Rev. B / September 2008 Return to Section Topics 7-9
Series 2600A System SourceMeter® Instruments Reference Manual Section 7: Reading Buffers
Note that readings is the default reading attribute and can be omitted. Thus, the following would
also return 100 Channel A readings from Buffer 1:
printbuffer(1, 100, smua.nvbuffer1)
Buffer status
The buffer reading status attribute can include the status information as a numeric value shown in
Table 7-8. For example to access status information for second element use the following
command:
stat_info = smua.nvbuffer1.statuses[2]
Table 7-7
Recall attributes
Recall attribute
1
Description
measurefunctions An array (a Lua table) of strings indicating the function measured for
the reading (Current, Voltage, Ohms or Watts).
measureranges An array (a Lua table) of full-scale range values for the measure range
used when the measurement was made.
readings An array (a Lua table) of the readings stored in the reading buffer. This
array holds the same data that is returned when the reading buffer is
accessed directly, i.e., rb[2] and rb.readings[2] are the same value.
sourcefunctions An array (a Lua table) of strings indicating the source function at the
time of the measurement (Current or Voltage).
sourceoutputstates An array (a Lua table) of strings indicating the state of the source (Off or
On).
sourceranges An array (a Lua table) of full-scale range values for the source range
used when the measurement was made.
sourcevalues If enabled, an array (a Lua table) of the sourced values in effect at the
time of the reading.
statuses An array (a Lua table) of status values for all of the readings in the
buffer. The status values are floating-point numbers that encode the
status value into a floating-point value (see Table 7-8).
timestamps An array (a Lua table) of time stamps, in seconds, of when each read-
ing occurred. These are relative to the basetime stamp for the buffer
(
Table 7-4).
1. The default attribute is readings and can be omitted. For example, smua.nvbuffer1 and
smua.nvbuffer1.readings will both return readings from Channel A, Buffer 1.
Table 7-8
Buffer status bits
Bit Name Hex value Description
B0 TBD 0x01 Reserved for future use.
B1 Overtemp 0x02 Over temperature condition.
B2 AutoRangeMeas 0x04 Measure range was auto ranged.
B3 AutoRangeSrc 0x08 Source range was auto ranged.
B4 4Wire 0x10 4W (remote) sense mode enabled.
B5 Rel 0x20 Rel applied to reading.
B6 Compliance 0x40 Source function in compliance.
B7 Filtered 0x80 Reading was filtered.

Keithley 2600a series Specifications

General

Brand	Keithley
Model	2600a series
Category	Measuring Instruments
Language	English