Figure 3-10 Buffer Locations; Buffer Statistics - Keithley 2010 User Manual

Figure 3-10
Buffer locations
RANGE
RANGE

Buffer statistics

The MAX AT and MIN AT values are the maximum and minimum values in the buffer. The
AVERAGE value is the mean of the buffered readings. The equation used to calculate the mean
is:
where: X i is a stored reading.
The STD DEV value is the standard deviation of the buffered readings. The equation used to
calculate the standard deviation is:
where: X i is a stored reading.
NOTE
RDG NO. 10
RDG NO. 9
RDG NO. 8
RDG NO. 7
RDG NO. 6
RDG NO. 5
RDG NO. 4
RDG NO. 3
RDG NO. 2
RDG NO. 1
STD DEV
Average
Min At XX
Max At XX
y =
n is the number of stored readings.
n
2
∑
X –
i
y =
i = 1
------------------------------------------------------------- -
n is the number of stored readings.
The Model 2010 uses IEEE-754 floating point format for math calculations.
Measurement Options
Reading Value
Reading Value
Reading Value
Reading Value
Reading Value
Reading Value
Reading Value
Reading Value
Reading Value
Reading Value
Standard Deviation Value
Average Value
Minimum Value
Maximum Value
n
∑
X i
i = 1
---------------- -
n
   
n
   
1
∑ 2
-- - X
   
i
n
   
i = 1
n-1
3-17