4 external capacity – Casella CEL Sensus data logger unit User Manual
Page 19
Table 2: Internal Store Capacity (512 kB)
Number of
Channels
Logging Interval
(mins)
Record Capacity Storage Capacity
1
1
47662
33 days
1
10
47662
33 days
1
60
47662
5.4 years
7
1
14979
10 days
7
10
14979
104 days
7
60
14979
1.7 years
24
1
5090
3.5 days
24
10
5090
35 days
24
60
5090
212 days
4.4
External Capacity
When logging to external media such as CompactFlash cards, the store is
updated with data being added to the card until it becomes full. Logging will
then stop until the card has been replaced with an empty one.
The following equations let the user calculate the record capacity
and the store duration for external media.
Again, these equations should be used only as a guideline, for the
same reasons as given for the internal store and also because of the
approximation that only 95% of the cards capacity is available for actual data
storage. Some example CompactFlash result capacities are given in Table 3.
Table 3: External Store Capacity (16 MB)
Number of
Channels
Logging Interval
(mins)
Record Capacity Storage Capacity
1
1
1448941
2.7 years
1
10
1448941
27 years
1
60
1448941
165 years
7
1
455381
316 days
7
10
455381
8.6 years
7
60
455381
51 years
24
1
154741
107 days
24
10
154741
2.9 years
24
60
154741
17 years
(
.
)
(
)
Re
Capacity in MB x
x
Channels x
cord Capacity
1048576
0 95
7
4
+
=
Re cord Capacity x Logging Interval
Store Duration
=
Logging
SENSUS Digital Data Logger -
Users Handbook
Page 19 of 44