ALTANA Micro-Haze Plus - Manual (Page 33)

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The formula for the standard
deviation is:
The series of measurements will be
stored automatically. The last
measurement can be recalled later
by selecting STATISTIC again. The
series of measurements can then
be continued.
9 Series of Measurements in Statistic Mode
9.1 Storing the Measured Values
In STATISTIC mode, each individ-
ual value is stored with the
corresponding time and date. A
lithium battery maintains the data
for 5 years even if the batteries for
operating the unit should be
discharged.
The internal memory is designed to
accommodate 999 measurements.
In order to recall the individual
values again, the measuring
instrument must be connected to a
PC or printer by way of the serial
interface as described in
chapter 12.