Keithley 2651A Reference Manual page 123

Section 3: Functions and features
Buffer status
The buffer reading status attribute can include the status information as a numeric value; see the
following table for values. For example, to access status information for second element, use the
following command:
stat_info = smua.nvbuffer1.statuses[2]
Buffer status bits
Bit Name
B0 FastADC
B1 Overtemp
B2 AutoRangeMeas
B3 AutoRangeSrc
B4 4Wire
B5 Rel
B6 Compliance
B7 Filtered
Dynamic reading buffers
Reading buffers can also be allocated dynamically. Dynamic reading buffers are created and
allocated with the smua.makebuffer(n) command, where n is the number of readings the buffer
can store. For example, the following command allocates a reading buffer named mybuffer that
can store 100 readings:
mybuffer = smua.makebuffer(100)
Allocated reading buffers can be deleted as follows:
mybuffer = nil
Dynamically allocated reading buffers can be used interchangeably with the smua.nvbufferY
buffers that are described in
3-16
Model 2651A High Power System SourceMeter® Instrument Reference Manual
Hex value Description
0x01 Fast ADC was used to make the reading
0x02 Over temperature condition
0x04 Measure range was autoranged
0x08 Source range was autoranged
0x10 4-wire (remote) sense mode enabled
0x20 Rel applied to reading
0x40 Source function in compliance
0x80 Reading was filtered
Reading buffer designations (on page 3-10).
2651A-901-01 Rev. A / March 2011