start-up (or after pressing “Cancel”):
AV G
∑
=
−
==
n
i
i
x
n
x
1
1
When the sampling number n exceeds 1 million times, the average value
calculation will be suspended and the displayed AVG value remain the same.
f) P-P is the peak to peak value during measurement. It is equal to the peak
to peak value for the measurement results since start-up (or after pressing
“Cancel”), i.e. P-P=MAX - MIN.
g) SN is the standard deviation and sampling number, and s and n
respectively refer to the standard deviation and sampling number below. The
first displayed value of SN is the standard deviation, which is equal to the
measurement value standard deviation since start-up (or after pressing
“Cancel”):
1
)(
1
2
−
−
=
∑
=
−
n
xx
s
n
i
i
, in which
n
x
x
n
i
i
∑
=
−
=
1
When the sampling number n exceeds 1 million times, the deviation value
calculation will be suspended and the displayed value remain the same.
h) The second displayed value of SN is the sampling number, which is equal
to the sampling number since start-up (or after pressing “Cancel”):
n≤999,999. n is shown as “OVER” in case of n≥1,000,000, which is a
prompt that the average value and the standard deviation are the
12
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