LumaSense Technologies 3434i SF6 Leak Detector - Manual (Page 110)

Chapter 9
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BE6028-14 3434i SF6 Leak Detector LumaSense Technologies A/S
Page 110 of 191
Monitor’s Background Memory to prevent it from being overwritten
(and therefore lost) by measurement data stored during the next
monitoring task. The same amount of data can be stored in both the
Background Memory and the Display Memory.
Structure of the Background Memory:
The data from a maximum of 10 monitoring tasks can be stored in
the Background Memory provided the total amount of data from the
10 tasks does not exceed the total capacity of the Background
Memory. Each monitoring task stored in the Background Memory is
given a “location number” (from no. 1 to no. 10). The size of each
location is flexible and is equal to the space required to store all the
data collected during a monitoring task. Each monitoring task stored
will occupy at least 2% of the total Memory capacity.
If data from a single monitoring task totally occupies the Display
Memory, then this data can be stored in Background Memory
provided that no data is already stored there. The data will occupy
only one location of Background Memory and fill all available storage
space. Therefore, it will not be possible to store any data from any
new monitoring task in Background Memory unless the data already
stored there is first deleted (see section 9.3.3 ).
To illustrate the variable size of each location let us suppose that the
following monitoring tasks are performed:
Task No. 1: The data collected in Display Memory occupies 20%
of the total capacity of the Display Memory. The data
can be stored in Background Memory provided that
the data already stored there occupies less than
80% of the total capacity of the Background
Memory. However, let us suppose that the
Background Memory is empty and that we STORE
the data from this monitoring task in location 1 of
Background Memory. This means that Background
Memory is now 20% full (see Fig.9.5 ).
Task No. 2: The collected data occupies 30% of the total capacity
of the Display Memory. Let us suppose that we
STORE the data in location 2 of Background
Memory. This means that Background Memory is
now 50% full (see Fig.9.5 ).
Task No. 3: The data occupies 40% of the total capacity of the
Display Memory. Let us suppose that we STORE the
data from this task in location 3 of Background
Memory. Background Memory is now 90% full (see
Fig.9.5 ).