Bartington Grad601 Operation Manual page 51

Note: This will also cause the data memory to be cleared and the parameters set in the Set
parameters menu to be changed to the initial default values.
Report the occurrence of any error messages to
21.2.1. Power Loss
Caution: If power loss occurs while the memory is being accessed then a few issues may
occur. Care should be taken not to power off the logger while the screen is displaying one
of the following messages: 'Saving...', 'Deleting...', or 'Please Wait...'. If this occurs then the
memory may become corrupted and data loss is possible.
In order to prevent loss of power, always ensure your battery is charged well before undertaking
a survey. It also is advisable to check the battery voltage at the end of each grid. It should be
charged if the voltage falls below 10V.
In most cases data can be recovered following a memory corruption.
The datalogger memory is split into sectors, so if one sector is corrupted then data from
previous sectors can still be recovered. Attempt to download the data using the Grad601
download software in the usual way. Any recoverable grids will download as normal; however, a
memory corruption can sometimes cause the final grid to download in a continuous cycle.
Note: If the number of downloaded bytes exceeds 260 000 then the download should be
interrupted manually. After interrupting the download, choosing 'Proceed to Save' will
allow the complete grids to be saved.
In order to continue using the equipment following a memory corruption, the System Reset
option should be selected from the main menu. No further grids should be recorded until a
System Reset has been performed.
Caution: Ensure that you have attempted data retrieval before choosing the System Reset
option as it will also wipe the memory in the process.
Caution: A System Reset should always be carried out following a memory corruption.
21.2.2. Consequences of Power Loss
Power loss during 'Saving...' : This message appears at the end of each traverse, the end of
a grid, and after changing options in the Parameters menu. Losing power at this stage may
cause the latest grid to be lost; however, any previous grids can be recovered by downloading as
normal.
Power loss during 'Deleting...' : This message is shown after choosing Delete data or System
reset from the main menu. Power loss in this case can cause loss of data; however, this does not
usually cause a problem as deletion is likely to be the aim of the user. This most often causes a
grid '0' to download seemingly without end.
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