20
Simple Logger
®
Models L320 / L410 / L430
APPENDIX B
Time-Extension Recording (TXR
™
)
Time extension recording is an automatic process that updates the sample
rate and the number of stored data points based on the length of the
recording. The maximum number of stored data points is 8192.
When the data logger starts a new recording session, it does so at its
fastest sample rate of 4096 points per hour (0.88 seconds per point). The
Simple Loggers
®
can record at this rate for two hours. If the recording ses-
sion continues beyond two hours, the time extension recording technique
becomes active.
Beginning with the sample, after the completion of two hours of recording,
the logger continues recording by selectively overwriting previously stored
data. The Simple Logger
®
also halves its sample rate to 2048/hr (1.76
seconds per point) for the new stored values to be compatible with the
previously recorded values.
Recording continues for the next two hours at this new rate until the
remaining 4096 storage points are filled.
2048
1
1st 2 hrs.
2nd 2 hrs.
2
3
4
5
6
4096 4097
8191 8192
1
2
3
4096 4097 4098
8192
Table B-1 - Time Extension Memory Allocation
The time extension recording process of selectively overwriting previously
stored data and halving the sample rate for new stored data continues
every time the memory fills up. Table B-2 shows the relationship between
recording time and sample rate for the data logger using this technique.
Содержание Simple Logger L320
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