LumaSense Technologies 3434i SF6 Leak Detector - Manual (Page 106)

Chapter 9
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BE6028-14 3434i SF6 Leak Detector LumaSense Technologies A/S
Page 106 of 191
Alternatively, the data in Display Memory can be printed out by
connecting a printer to the Monitor and transmitting data via the RS
232 interface port of the Monitor (see Chapter 10 ).
The storage space in Display Memory is finite. Once this memory has
been filled by data from a monitoring task any additional data
collected will start to overwrite some of the data already stored
there.
Block 5 – Stored Measurement Data:
By selecting to STORE data when the Monitor is operating in
Memory mode the user can copy data from Display Memory into
Background Memory to “protect” data against accidental deletion
from the Display Memory (see section 9.3.1 for further details).
The storage space in Background Memory is finite and is exactly the
same size as the storage space available in Display Memory (see
section 8.3 for further details).
Data which has been stored in Background Memory can be recalled
to the Display Memory. This is done by operating the Monitor in
Memory mode and selecting to RECALL data (see section 9.3.2 ).
When data is “recalled” to Display Memory it is not transferred from
Background Memory to Display Memory, it is only copied into
Display Memory so there is no risk of losing it. In Display Memory the
user can scroll through the data.
Data stored in Background Memory can be deleted by operating the
Monitor in Memory mode and selecting to DELETE data (see section
9.3.3 ).
9.1.4 Effect of a Calibration Task on the Monitor’s Memory
Before calibration of the optical filters in the Monitor the UA number
of the installed filter is “entered” into the active set-up of the
Monitor. This enables the Monitor to find a set of numerical
parameters, which describe the optical filter (this information is
found in the Read Only Memory of the Monitor). These numerical
parameters are called Optical Filter Factors.
During a CALIBRATION TASK the Monitor uses the Optical Filter
Factors to calculate the calibration factors for the installed optical
filter. As explained in section 9.1.2 , by “entering” a Filter Bank No. in
the active set-up before calibration of the particular filter with the
particular gas, each filter can be calibrated to measure up to five
different gases and the filter bank number tells the Monitor exactly