Accusonic 8510+ series Reference Manual page 54

6-10 Accusonic Model 8510+ Series Flowmeter
Data Log Setup (Datalog Menu)
Choosing DataLogging/Data Log Setup from the main menu allows the user to set up the parameters for
data logging at the flowmeter. This capability is optional, and requires the flowmeter to have the data
logging memory card.
First choose the kind of log file you desire, main or temporary. The main file provides 192k of capacity,
while the temporary provides only 16k. Typically, the temporary memory is used only for short term
debugging. In addition, a measurement status can be logged with every measurement by checking "Log
Status". The parameters in use may also be recorded by checking "Log Parameters". Normally, the log will
overwrite memory when the logging memory is completely full, always keeping the most recent data. To
prevent any overwriting, check "Stop logging when memory is full". Next, choose a logging interval in
hours, minutes and seconds. The maximum interval is 24 hours.
Finally, choose the sections, paths and variables you wish to log. When complete, click on "Send Setup to
Meter", and the parameters will be sent to the meter, and logging will begin. This action will start a new log
file, so any previous data will be overwritten. You can also view the flowmeter setup by clicking "Get
Meter Setup".
As changes are made to the setup, the amount of memory capacity in terms of logging hours is displayed.
For example, if you log section 1 flow at 1 hour intervals, the memory capacity is 98,280 hours (about 11
years). The message will say you have chosen 2 parameters because time is always logged.
Retrieve Logged Data (Datalog Menu)
This command is only available to models 7510 and 7510+ flowmeters, model 8510 flowmeters handle
logged data in a different manner, see Translate Logged Data (Datalog menu).
Choosing Data Logging/Retrieve Logged Data from the main menu allows the user to retrieve data that has
been logged at the flowmeter. Note that in a 7510 flowmeter this capability is optional, and requires the
flowmeter to have the data logging memory card. 7510+ flowmeters include datalog capability at all times.
First, choose how much data to retrieve, the "most recent", or "all data". If you choose most recent, you
must click on the "Retrieve Directory" button. This will provide you with the number of "blocks" available,
and the number of hours of data stored in a block. Choose the number of blocks you wish to retrieve. For
example, if 8 blocks are available, each with 1 week of data, and you wish to retrieve 2 weeks of data,
select 2 blocks.
A block is a segment of memory 64 Kbytes long. AccuFlow calculates the number of hours in a block
based on the number of parameters being logged, and the logging frequency. Since data is retrieved in
blocks, the user should choose the number of blocks that is closest to the desired amount of data.
Accuflow will automatically choose a basic data name for you that is a new folder named "data-n" where
the n is used to make this folder name unique. If an existing folder name is entered in place of the one
chosen by Accuflow you will be given the option of appending the data to the existing files or erasing the
existing files and writing new ones. Now you can click on "Retrieve Data". Each data block will take about
45 seconds to retrieve and store. If the data is corrupted, this time can be longer. If you check for
confirmations, you will be given the option of not retrieving a particular block.
Checking the Append to Existing will launch a dialog to assist navigating to the folder where the collected
data should be appended. Accuflow will estimate which data block should contain the next record and
begin downloading the data. This method will retrieve any data from the flowmeter that was logged after
the last record in the existing data files.
Once the data is retrieved, it is stored under the [Data] folder in a folder with the name you provided. The
data is stored in comma separated value files (CSV), these files are compatible to most current spreadsheet
application. The file naming conventions are:
The base name will reflect the date of the first record as mmddyyyy.
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A letter is appended to the name to indicate the type of data contained in the file.
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