Acoustic Research Ngara, Руководство пользователя

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Ngara
User Manual
Table 2: Allowable Disk States
State Description
Unknown
Current disk is invalid
Powering Up
New disk is currently being mounted
Removed
No valid disk found
Format Required
Disk with invalid file table or sessions deleted
Present
Valid disk found

It may still be possible to format an
Unknown
disk.
However, if the disk remains
Unknown
after a format, then it could be a USB 3.0 device
3.1.3 Session Directory
Each newly created session is stored as a separate directory within the USB disk. Each session directory contains the
following:
• Session log file
Used to record errors and events which occurred during the logging session.
• Session information file
Used to store logger configuration during the logging session.
• Data directories
Directories in which logging data is stored into.
3.1.3.1 Session Log File
Session information messages, along with any session errors are displayed within the log file.
Ngara maintains a copy of this log file in its internal memory. This allows correct error logging, even when access to
the USB is not possible.
If no disk errors are encountered during a session, the internal log file is always flushed to the USB disk. However, if
there were errors found, the log file must be manually flushed at the end of the session.
3.1.3.2 Session Information File
Session settings are also stored to the session directory.
Table 3: Session Detail File
Tag Description
SERIAL
Logger serial number
VERSION
Logger software version
CALIBRATION
Logger calibration (absolute)
RANGE MULTIPLIER
Logger range multiplier calibration (absolute)
SESSION NAME
Session Name
SESSION START Session start time
SESSION END Session end time
TWEIGHT Time Weighting ( 125ms or 1s )
WAVE REC Wave file recording ( ON or OFF )
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