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Section 6
To setup and enable Circular Memory:
The Datalogger Mode menu must have the [Memory] menu cell selected.
Datalogger items must be selected (e.g., Site ID, Date, Time, etc.).
All active channels in the Channel Setup menu must be disabled. To disable active channels,
select the [Channel Enable] menu cell and then [No].
In the Datalogger Control menu, select [Circular Memory].
Press the <Right Arrow> to access the [Circular Memory] option list.
Move the cursor to [Yes] by pressing the <Up/Down Arrow>.
To store selection press <ENTER>.
Lastly, re-enable the channels that you disabled earlier to begin logging.
Est Log Time Left
Est Log Time Left is a "view-only" menu cell that shows an estimate of the amount of Datalogger time
remaining in hours and minutes. This menu cell becomes active after you enable datalogging. Select-
ing Circular Memory and/or event-based datalogging (see Datalogger Setup), blanks the field [Est Log
Time Left] and is based on the log interval and data selections made in the Datalogger Setup. For
Single-Channel flowmeters, this time is an estimated minimum since data compression is employed
for improved storage efficiency.
Clear Datalogger
If you use the Datalogger in its default mode, eventually you will use all the memory available for Data-
logger storage. When this occurs, you will not be able to log more data until you free up the memory.
The Clear Datalogger command erases ALL stored Datalogger data. Therefore, you should evaluate
the currently stored data, and print any valuable information before using this command. Note: Saved
Sites also consume datalogger RAM.
To clear Datalogger Data Memory:
To access the [Clear Datalogger] option list press the <Right Arrow>
Move the cursor to [Yes] by pressing the <Up/Down Arrow>.
To clear the memory press <ENTER>.
6.10.5 THE MEMORY CONTROL MENU
Memory Control is a reference menu that shows the amount of bytes of data memory left.
The data memory capacity depends on the number and complexity of the site setups stored in memory
and the size of the current datalogger file.
MEMORY CONTROL MENU
Data Memory Left
Defragment
Data Memory Left: This view only menu cell shows the
minimum remaining number of characters available for
XXXXX
Datalogger and site storage. When the Datalogger is
No
enabled for circular mode, the meter allocates all of
Yes
memory except for two conventional empty sites worth
for datalogger use.
6-60
1020NFM-1D
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