Det-Tronics ATX10 Transmitter - Manual (Page 9)

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PROFILE MODE
The Profile Mode of operation includes user adjustments
for Pre-Alarm setting, and allows the use of either a
level alarm threshold, or a dynamic alarm profile using
the patented Learn Function. The Learn Function
optimizes both detector sensitivity and discrimination by
recording background environmental acoustic Sound
Pressure Level (SPL) across a wide frequency range.
The resulting ‘profile’ of the background SPL provides
a unique acoustic fingerprint of that environment and
is used as a dynamic alarm threshold. This feature of
Profile mode allows the detector to ignore nuisance
background sources without significantly impacting
sensitivity or having to reposition the detector.
An important advantage is that the FlexSonic Acoustic
Detector is immediately operational out-of-the-box
while simultaneously performing an on-site sound
survey with the Learn Function.
Table 2 details the user adjustments in Profile Mode.
DATA STORAGE / MANAGEMENT
Flash Memory
The ATX10 has onboard flash memory that is used
as the primary location for storage of safety critical
parameters. The ATX10 flash memory contains the
following data files:
Configuration Data – The Configuration data includes
all the settings that define the mode of operation of the
ATX10.
Saved Profiles – In the Profile Mode of operation,
the option to use the Learn Function is available. Up
to 10 different acoustic profiles generated by the learn
function can be saved to flash for use as the alarm
threshold.
Event Logs – Specific alarms, faults, and configuration
change events are logged with a time stamp to the
onboard flash in the ATX10.
SD Memory Module
The ATX10 Memory Module is a removable storage
feature implementing an extended temperature range
micro SD card. The Memory Module provides storage
capability for over 6 months of real time acoustic
data as well as backup storage for the safety critical
parameters maintained in onboard flash. The ATX10
Memory Module’s SD card is formatted as a standard
FAT file system (typically FAT32), which allows the disk
to be read by most PCs. The ATX10 Memory Module
contains of the following data files:
Real Time Log – Acoustic spectral data and device
status information are written to log files at a 1 second
interval. When the Memory Module has reached capacity
of real time log information, it will overwrite the older files.
Configuration Data Copy – When properly configured,
the ATX10 will write a synchronized copy of the
configuration data file from onboard flash to the Memory
Module.
Copy of Saved Profiles – As with the Configuration
data, the ATX10 will write a synchronized copy of the
profile data to the SD Memory Module.
SD Memory Module Operation
At several times in the operation of the ATX10, a Memory
Module Initialization will occur. This involves checking
the presence and integrity of the Configuration and
Profile files on the SD card.
The SD Card must meet the capacity and environmental
ratings as specified by Det-tronics. The backup storage
of data on the Memory Module also enables rapid
configuration of replacement units, as well as SD card
interchange via write protected HART commands:
UPLOAD – This command will leave the ATX10 flash
memory unchanged, but synchronize the data by
replacing the configuration and profile data files on
the SD Memory Module. In other words, the data is
uploaded from the ATX10 onboard flash to the SD
Memory Module.
Profile Type learn or level
Parameter Level (dB)
Delay
Sec)
Recover
(Sec)
Pre-Alarm
On
Pre-Alarm
Level
Sensitivity
(dB)
Band Count
Range 40 - 120 0 - 30 0 - 30 yes / no 0 - 99 db 0 - 20 1 - 24
Increment 1 1 1 n/A 1 db 1 1
Default 59 5 1 no 6 db 4 14
Table 2—profile mode Alarm Settings