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6-4
Buffer
Buffer statistics
•
•
•
•
NOTE
MIN and MAX provides the minimum and maximum readings stored in the buffer. It
also indicates the buffer location of these readings.
The Peak-to-Peak reading is the absolute value of the difference between the MAX and
MIN readings. It is calculated as follows:
Peak-to-Peak = |MAX - MIN|
Average is the mean of the buffer readings. Mean is calculated as follows:
y
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:
n
∑
X
y =
i
=
1
------------------------------------------------------------- -
where: X i is a stored reading.
n is the number of stored readings.
The Model 2182 uses IEEE-754 floating point format for math calculations.
n
∑
X i
i
=
1
=
---------------- -
n
n
2
1
2
∑
–
-- -
X
i
n
i
i
=
1
n-1
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