Keithley 2016 - Buffer Statistics; Limit Operations

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 2016 uses IEEE-754 floating point format for math calculations.
Limit operations
Limit operations set and control the values that determine the HI / IN / LO status of
subsequent measurements. Limits can be applied to all measurement functions except
continuity. The limit test is performed after mX+b and percent math operations. Unit prefixes
are applied before the limit test, for example:
• Low limit = -1.0, High limit = 1.0
A 150mV reading equals 0.15V (IN).
• Low limit = -1.0, High limit = 1.0
A 0.6kΩ reading equals 600Ω (HI).
You can configure the multimeter to beep or not when readings are inside or outside of the
limit range.
y
X
i
i1=
n
∑
n
-----------------=
X
2
i
i1=
n
∑
1
n
---X
i
i1=
n
∑




2




–
n-1
--------------------------------------------------------------
y =
3-18 Measurement Options