ACR Electronics Nautilus Reference Manual page 15

Nautilus Data Loggers
9
Full.
To set the compression method click on the Compression field and select ON. A run length
compression method is used. Run length compression stores the reading plus the number of
consecutive times the same reading was measured. This means that the logger will store 2
values to memory, the data value and a counter value. If the reading were 22°C for 3 sample
periods then the logger would store 22°C and the count of 3. Once the reading changes a
new compression session begins. The compression session will last to a maximum of 15
consecutive readings that are the same. If the 16th reading is still the same a new session will
start.
Note that when the compression is set to ON the Start Time will display as NA in the Status
window. If you want to see that Start Time do a Backup of the logger, the Start Time will be
displayed in the Statistics tab of the graph
To set when the logger will start recording click on the Start Time field. Next, click on the
small button that appears at the right. This will pop up a form allowing you to set the date and
time. Highlight the date or time and enter the appropriate value. You can also click on the
drop-down list arrow to bring up a calendar. You can set the logger's starting time for just
over 65535*8 seconds (6 days, 1 hour, 38 minutes) ahead of the current time. Note that the
start time will default to the closest time sampling within 8 seconds of the selected time.
Copyright © 2010 ACR Systems Inc. All Rights Reserved.