Keithley 2280 Series - Page 38

Series 2280 Precision DC Power Supply Reference Manual Section 2: General operation
077085503 / March 2019 2-19
Measure Data Buffers menu
From this screen you can save, resize, and clear buffers. You also can set buffer fill mode and
statistics functions.
Setting
Description
Size
Set the maximum number of readings the buffer can store (2 to 2,500). Note
that when you resize a buffer, the readings contained in that buffer are
cleared.
Mode
Select Always to have the buffer fill continuously, overwriting old data when
the buffer is filled.
Select Next to have the buffer stop collecting data when it is filled (no data is
overwritten).
Select Never to have the buffer stop collecting data.
Statistics
Select statistics to apply to the readings in the buffer. Available statistics:
 Minimum: Minimum value
 Maximum: Maximum value
 Peak-Peak: Maximum value - minimum value
 Mean: Average
 Std Dev: Standard deviation
Statistics Function
Select whether to apply statistics calculations to current or voltage readings.
You can only specify one of them at a time.
Auto Clear
Enable or disable autoclear for the buffer. When autoclear is enabled, the
buffer will automatically clear when the storage process starts.
Statistics Format
Select the data elements to be shown on the graph and data sheet screen.
Available data elements:
 Value: Voltage and current reading
 Time: The timestamp for the data point
 Number: Reading number
 All: Voltage and current reading, timestamp for the data point, and
reading number
Export To USB
Save the buffer to a .csv file, which can be opened by a spreadsheet
program.
Clear Buffer
Clear all the data in the buffer.