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...2 OPERATION
...2.3 Chart View
Historical Review
Goto
Exit
Historical Review
Goto
Exit
10
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 generated are added to the alarm event log at the present time, not
the time indicated by the cursor.
• 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 removable 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
'Goto' target date
'Goto' target time
Selected 'goto' target
date/time is within
daylight saving period
Moves cursor between
'goto' target date and
time boxes
Notes.
• If daylight saving is enabled (see Section 4.4.3) and the selected 'goto' target date/time
is within the daylight saving period, 'Daylight Saving' is displayed on the dialog box.
• 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 individual channels (Advanced
Configuration mode only – see Sections 4.4.1 and 4.6.1), 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
key also exits Historical Review mode and displays the next
enabled view.
Returns to Menu
Newest data in
internal memory
Goes to the chart
view at the selected
'goto' target date
and time
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