ABB SM1000 User Manual page 9

...2.3 Chart View
Historical Review
Goto
Exit
Notes.
While in Historical Review mode:
• Recording of new data continues unless stopped from the Setup Menu – see
Section 3.3.
• Invalid historical data (e.g. when recording has stopped) is denoted by '– – – –' in the
digital indicator.
• Where the trace at the cursor position represents more than one sample, the indicators
flash between the maximum and minimum values of those samples.
• Menu options remain active, allowing the screen interval to be changed, different
scales and channels to be selected, etc.
• Operator messages are added to the alarm event log at the present time, not historical
time.
• All data stored in the instrument's internal memory can be viewed.
• The display can be scrolled back to the start of the oldest data.
• Archiving to removeable media does not occur but all data recorded in the internal
memory buffer during this time is archived on exiting Historical Review mode.
Select Goto to move to data stored in the instrument's onboard memory that was
recorded at a specific date and time.
Oldest data in
internal memory
Target date
Target time
Moves cursor between
target day, month, year,
hours, minutes & seconds
Notes.
• Once internal memory becomes full, oldest data is overwritten by newest data. If
historical review has been selected for some time, the oldest data present may no longer
be available.
• The instrument exits historical review mode automatically after 3 hours or when the
oldest channel data file start time (which changes as files wrap) is earlier than the time
that historical review mode was selected.
Select Exit to return to the real-time recording display.
Note. Pressing the
enabled view.
Returns to Menu
key also exits Historical Review mode and displays the next
2 OPERATION...
Newest data in
internal memory
Goes to the chart
view display, at the
selected date and
time.
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