Keithley 2000 - Buffer Statistics

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
n is the number of stored readings
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
n is the number of stored readings
NOTE The Model 2000 uses IEEE-754 floating point format for math calculations.
y
X
i
i1=
n
∑
n
-----------------=
X
2
i
i1=
n
∑
1
n
---X
i
i1=
n
∑




2




–
n-1
--------------------------------------------------------------
y =
Measurement Options 3-19