ABB SM2000 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 Set Up 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.
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.
• If different sample rates have been selected for different channels, earlier data from
channels with faster sample rates are overwritten before those with slower sample rates.
• The instrument exits historical review mode automatically after 15 minutes if no key is
pressed.
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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