LumaSense Technologies 3434i SF6 Leak Detector - Manual (Page 104)

Chapter 9
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BE6028-14 3434i SF6 Leak Detector LumaSense Technologies A/S
Page 104 of 191
filter is calibrated. For example, Filter Bank No.”1” for storage of the
calibration factors for Sulphur hexafluoride.
After calibration of the filter UA 0988 the Monitor is able to
accurately monitor the gas mentioned. By selecting the correct
FILTER BANK NO. in the set-up of the Monitor before a monitoring
task is started, the user determines which calibration factors will be
used during the task. For example, when Filter Bank No.”1” is
entered in the active set-up for filter UA 0988 in position ”A”, the
Monitor reads the calibration factors from file “A1” into its Working
Memory .
Block 2 – Optical Filter Set-up Parameters:
This block contains 3 of the 6 parameters, which describe the optical
filter installed in each position of the filter carousel:
UA number of the filter;
Filter bank number;
S.I.T. information;
If any of the above-listed parameters are changed in the active set-
up they are also automatically changed in the Source Memory.
Block 3 – Other Set-Up Parameters:
This block of data contains all set-up parameters except the optical
filter parameters. Before leaving the factory the parameters in this
block are given factory-set values. These are the values obtained for
a parameter when the Default button is pressed.
9.1.3 Working Memory (RAM)
The Working Memory is a “volatile” memory, that is, data will be
lost from it if electric power is removed from the Monitor. When the
Monitor is not connected to a mains power supply a lithium battery in
the Monitor provides a back-up power supply to protect the data in
this memory. When this battery is no longer providing enough power
a warning BACK-UP BATTERY TOO LOW will appear on the
Monitor’s display to indicate that the battery needs to be replaced by
a new one.
There are four different blocks of data in the Working Memory (see
Fig. 9.1 ):
Block 1 – contains only calibration factors and 3 optical-filter
parameters from the active “Filter Bank”.