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Programming and Operating Concepts
Video Recorder – User Manual 77
The next step to complete is to initialize the disk on the video recorder as you would have done normally,
as explained in the «Initializing a zip disk» section, except that this time, it will take just a few seconds.
Note: it is recommended to dedicate a ZIP disk to storage of data only and store configurations of
products on a separate disk.
Data Storage Status
The prompt DATA STORAGE STATUS, accessed from the Online DATA STORAGE menu item,
displays a calculation of how long a particular disk will last based on the configured data storage
schedule. Disk capacity is indicated in days, hours, and minutes remaining on the disk.
After the instrument has been Online and actively performing Data Storage to disk, a warning message
will appear when the disk reaches the default 90% capacity, or a user-specified capacity. Once a disk
has reached its programmed capacity, a DISK FULL message will be displayed.
Data storage considerations
In order to guarantee a proper operation of the instrument (e.g. no sample lost), there is a maximum load
that the video recorder should not overcome. This load can be theorically computed by considering the
number of data storage trends, live trends and live screens programmed and their associated sample
rate.
1 ) One live screen counts for one schedule per second. At least one live screen is present in the
instrument. A live screen is a display that require any measurement information to be built.
2 ) Each ENABLED Data Storage schedule has a user defined sample rate.
3 ) Each ENABLED Live Trend has the following sample rates :
Screen Size Schedule Sample Rate
5 Min Screen 1 Second
15 Minute Screen 3 Seconds
30 Minute Screen 6 Seconds
1 Hour 12 Seconds
2 Hours 24 Seconds
4 Hours 47 Seconds
8 Hours 93 Seconds (1.55 Minutes)
24 Hours 279 Seconds (4.65 Minutes)
7 Days 1951 Seconds (32.5 Minutes)
31 Days 8640 Seconds (2.4 Hours)
Therefore, to guarantee a proper operation of the instrument, the following inequation should allways be
true :
Σ
Programmed trend
(
live or data stora
g
e
)
A
ssociated sample rate
Number of
live screens
+
< 6