Instructions

UM-0085-B09 DT80 Range User Manual Page 117
RG
• always use the REMOVEMEDIA command before removing the memory device if there are schedules logging
directly to the USB device
Note: the DT80 provides some protection against gradual power failure (e.g. the internal battery becoming discharged). If it detects that
the supply voltage is becoming critically low, the DT80 will automatically close all store files and force the unit into low power
Sleep
Mode (P300). The DT80 will remain asleep until the power supply recovers to an adequate level.
Recovery
 Media Removal
If a USB device was accidentally removed while it was being logged to, you should plug it into a Windows computer.
Before attempting to open any of the files, run a Windows file system check utility (e.g. type chkdsk drive: at a
command prompt, where drive is the drive letter assigned to the USB device). This will detect and if possible repair any
inconsistencies in the file system structure.
Note that even if there are no file system errors, there may still be corruption in one or more store files (DATA_x.DBD) if
they were being actively logged to at the time of the media removal. Copy the files to the host PC and verify that they can
be opened successfully and all the expected data is there.
If the files appear to be damaged (e.g. they don't open correctly in dump_dbd) then the original files on the USB device
should be deleted
before inserting the device back into the DT80 and re-enabling logging. This avoids having the DT80
attempt to log data to a damaged file, possibly causing more damage in the process.
 Power Failure
If external power was lost and the battery link was not present or the internal battery was flat, then the internal file system
may be corrupted (if it was being written to at the time of the failure).
When power is restored, the DT80 will attempt to automatically repair the file system (using the
B:\FAILSAFE file) if
necessary.
Before re-enabling logging, it would be prudent to manually copy to a USB device the store files for the job that was
active at the time of the failure, e.g.:
COPY B:\JOBS\JOE\A\DATA_A.DBD A:\JOE_SAVE\DATA_A.DBD
and verify that they can be opened on the host PC.
 Store File Recovery
If a store file is damaged, contact dataTaker technical support for assistance. We may be able to recover data from the
file. But note that prevention is always better than cure.
 Badly Formatted Device
In exceptional cases, a severely corrupted memory device may result in a fatal error occurring on the DT80 when the
device is inserted, and this may cause the DT80 to reset. If this is the case, you can try holding down the Cancel/Func
button while inserting the memory device. This will cause the DT80 to not attempt to read the device; instead it will
display USB device unrecognised. You can now reformat the device using the
FORMAT A: command.