In-situ Level TROLL 400, Operator'S Manual, Page: 56 / 85

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A new level reference must be entered while the device's pressure sensor is
submerged in its final position in the water. This is because the current probe
reading is set equal to the Level Reference to create the offset that takes effect at the start
of the data log. The log header will show the probe reading at the time you entered the
Level Reference.
During log setup, the software presents two additional options for entering the Level Reference:
l
Set first logged reading —Use this option when the instrument will be deployed on wire rather than cable
because you will not be able to communicate with the instrument when it is submerged.
l
Remind me to set reference later —Use this option to defer the entry of the Level Reference during log setup and
set a reminder to enter it when the device is submerged in its final position.
Starting a Log
Every log is programmed for either a manual or a scheduled start. A log with a manual start time is displayed in the Logging
screen with
Ready in the Status column. A log with a scheduled start time is displayed with Pending in the Status column.
Starting a Pending Log
A Pending log automatically starts at the scheduled time without any user intervention.
A scheduled log with
Pending
status can be manually started at any time before its
scheduled start.
Starting a Manual Log
With the instrument connected to the software, select the Logging tab.
Select the Ready log you want to start.
Click the Start Log button . The log starts and the symbol changes. The Status column displays Running .
Suspending (Pausing) a Log
A running log may be temporarily paused. For example, you might want to reposition an instrument, calibrate a sensor, or
clean a sensor and later resume the log. A log can be suspended and resumed three times.
1. With the instrument connected to the software, select the Logging tab .
2. Select the log you intend to suspend.
3. Click the Suspend button . Suspended appears in the Status column.
Resuming a Suspended Log
1. To resume logging after a log has been suspended, select the Logging tab.
2. Select the Suspended log.
3. Click the
Start Log button . Logging resumes. Running appears in the Status column. The data file will
show the time when the log was suspended and the time when it restarted.