296 43-TV-25-30 Iss.6 GLO Aug 07 UK
It provides an excellent illustration of how less data points can be used to construct an iden-
tical trace.
Diagram 2.
Note. This data extract was taken from a 56 hour temperature run, which resulted in approx-
imately 1 Mbyte of sample data, and approximately 40 Kbyte of Fuzzy Logged data.
A compression ratio of 25 times!!
Anything else it can do?
Yes! Fuzzy Logging can be used as a ‘One Hit’ recording button.
In applications where the measured process is new or the ideal scan rate is unknown Fuzzy
Logging is ideal, as it adapts the log rate to the input signal, and can therefore find the opti-
mum logging rate for you.
Tolerance band widths
Tolerance band width can be set as a percentage of the scale range allowed above and be-
low the input signal.
A second band width can be set, this is where a tighter tolerance can be specified which
must be set within the limits of Band 1. Specify, as a percentage of the scale range, the tol-
erance band allowed above and below the input signal. See “Logging Menu” on
page 66..
Fuzzy Logged
Sampled Logged
Band 1%
Band 2%
Trace
Band 2%
Band 1%
Figure 18.1 Fuzzy logging tolerance settings
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