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VISUAL SUPERVISOR TUTORIAL/USER GUIDE
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Leave the logging going for a minute or two, then press Menu, LOGGING. Make a note of the current time
shown near the top-left of the Instrument screen, then press OFF-LINE and remove the storage device.
10 While data logging continues the data is held in the internal buffer store. The exact amount depends on how much
data is being logged, in this case several minutes of data will be buffered. Insert the storage device into your
Computer and examine the contents so far. You should see a single log file, called, e.g. lgroup.asc. Open the file
in a text editor such as ‘Notepad’ or as a .csv file in a spreadsheet (e.g. ‘Excel’). Figure 4-3b shows the sort of
contents you should see.
11 When you’ve finished examining the log file, re-insert the storage device into the Instrument and press
MONITOR, to resume logging to storage device. You may have to wait a few moments to see any storage device
activity. Buffered data is flushed onto the storage device.
Note Should logging to storage device fail to resume, press OFFLINE then MONITOR to restart the
process.
12 Leave the logging going for a further period, e.g. until the setpoint program has finished, then set the Logging
Monitor window’s Logging field to ‘OFF’. Press OFFLINE and remove the storage device.
Note The OFFLINE keys that appear in the Logging Monitor window and also in the Logging window do
the same job.
13 Examine the contents of the storage device again in the Computer. You will now see two files, lgroup.asc and
lgroup.as1. Open the .as1 file, which is a logical continuation of the original ‘asc’ file, created because you
interrupted logging by removing the disk. Further continuation files would keep the same root filename with
extensions ‘asc2’, ‘asc3’, etc. You should find that despite removing the storage device for a few minutes, that no
logged data has been lost.
HA029587
Issue 1 Jul 07
Chapter 4
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