Purge Data

This menu option will allow the user to delete data in one of four ways.  This menu option will be useful if any of the following conditions apply:

• There is a “Low disk space” alarm on the screen

• Communication with the video recorder data logger has been down for a few hours and the user needs to get that data from the data logger

• The user believes that data is missing or is incorrect for the past week and would like to synchronize just those hours and/or days

• The user wants to delete all data and completely resynchronize with the video recorder data logger

Before, this would have been accomplished by shutting down the screen program and manually deleting the files from the storage card.  With this menu option, the user can perform these operations without shutting the screen program down.  There is a drop down list on the Purge Data screen that will allow the user to select what data is to be deleted.

 

The first option, “Recent Data”, will allow the user to delete the most recent data from the screen.  Each option will have a brief description listed on the screen that the user can scroll through and read.  These descriptions will also be listed in this manual.

Description – This option is useful if you have had an interruption in communications between the VR screen and the VR brick (data logger).  After purging recent data and restarting the screen, the screen will download the data from the brick during the synchronization procedure.  Assuming continuous operation, data from the past 7 days is available for download from the VR brick.

It may take up to 1 hour for the screen to download and compress the week of data.

The user will have the option to delete between 0 and 7 days, and 0 and 24 hours from the VR screen.  Clicking on the Purge button will delete the files.  Clicking on the Cancel button will cancel the purge and close out the screen.  The user will have to confirm the purge.

Clicking on the Yes button will begin the file deletion.  Clicking on the No button will cancel the delete process.  Since this process involves deleting data logged data, the user will have a second chance to confirm the deletion.

Clicking on the Yes button will begin the file deletion.  Clicking on the No button will cancel the delete.

Since the VR screen will need to be restarted in order to resynchronize with the data logger, the user will have the option to restart the screen from the Purge Data menu.

The second option, “All Data”, will allow users the ability to delete all of the logged data from the VR screen.  This option can be used if the user wishes to completely resynchronize the VR screen with the VR data logger. 

Description – This option deletes all log data stored on the screen.  After rebooting the screen is rebooted, recent data will be downloaded from the VR brick (data logger) and compressed.  This will take up to 1 hour to complete.

The user will have to confirm the deletion twice in order for the files to be deleted. 

Since the VR screen will need to be restarted in order to resynchronize with the data logger, the user will have the option to restart the screen from the Purge Data menu.

 

The third option, “Old Data”, will allow the users the ability to delete older data from the VR screen.  The option can be used if the user wishes to free up space on the storage card.

Description – This option is useful for freeing up space on the flash card.  Be sure that the data you are deleting has been backed up, or is no longer needed.

The user can select the start date from the list box on the screen.  The program will delete any datalog files that are older than the selected date.

To ensure that the datalog files are backed up before purging the data, it is recommended that the user run the download option from the VR Manager (Download Data button on the main screen, or Tools ® Communications ® Advanced Download & Maintenance menu option).

The user will have to confirm the deletion twice in order for the files to be deleted. 

Since there is no need to resynchronize the data on the screen with the data on the VR data logger, the user will not have to restart the screen.

 

The fourth option, “Advanced”, will allow the users the ability to delete datalog data from specific time frames.  This option can be used to free up space on the flash card, or to cause a resynchronization between the VR screen and data logger.

Description – This option deletes data between two specific dates.  If these dates fall within the past week, you may choose to restart the screen to synchronize that data.

The user can select the starting date and time from the “Between:” section and the ending time from the “and” section.

The user will have to confirm the deletion twice in order for the files to be deleted. 

Since the VR screen may need to be restarted in order to resynchronize with the data logger, the user will have the option to restart the screen from the Purge Data menu.