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Levelogger User Guide - Software Version 3.4.0 or Higher
Page 23
•
Density Adjustment
is used to adjust the range of the Levelogger based
on the sample fluid density. The range for the density adjustment is from
0.9 kg/L to 1.1 kg/L. Uncheck the Density Adjustment field to disable the
Density Adjustment function.
• Sample Mode , allows you to choose the sampling measurement type.
Options are Linear, Event-based and Schedule.
• Memory Mode Selection will be grayed-out if not in Linear Mode
sampling. When using a Levelogger Gold in Linear Mode, there is a choice
of Continuous Logging (wrap around) or Slate Logging. In Continuous
Logging the new log is started at the end of any previous log and continues
logging, eventually recording over the first logged data. As one of the
download options is to ‘Append Data’, Continuous Logging can be a
preferred choice when logging long-term. In Slate Logging the new log
is also started at the end of any previous log, but will stop recording after
40,000 readings, so that the beginning of the current log will not be
written over.
• Linear refers to a set time interval between collection of readings. Sample
Rate can be any number from 0.5 seconds to 99 hours. The LTC
Levelogger Junior has a minimum sampling rate of 5 seconds. The time
unit and number of time unit intervals between each reading are set up
in the Sample rate fields. The Levelogger Gold and Barologger Gold can
store 40,000 readings of level and temperature. The Levelogger Junior
can store 32,000 readings, and the LTC Levelogger Junior holds 16,000
sets of level, temperature, and conductivity readings.
• Event-based Sample Collection is the most memory efficient means of
data collection. In Event mode, the Levelogger will activate every sampling
interval defined in Sample rate and check if readings have changed by
the selected percentage (0.1 - 25% of Full Scale) from the last recorded
reading. For Levelogger Gold level is the selected parameter where
change is monitored. The Levelogger will record a new reading only if the
specified change in level has occurred. Note that the percentage of change
for sample collection is set in the Percentage field beside the Sampling
mode and that the threshold change is a percentage of the Levelogger's
Full Scale for that particular parameter. An important reminder is that,
although actual memory usage in stable water level conditions may be
relatively small, battery power consumption is partially a function of the
sample reading rate. Therefore, a small sample reading interval will
consume battery power at a higher rate whether readings are stored
or not. In Event-based sampling mode, the Levelogger Gold has a total
memory of 25,000 readings of level and temperature
Note:
The battery life
of the Levelogger
Gold is 10 Years,
based on 1 reading per
minute. More rapid readings
will reduce the battery life.
For example, if a Levelogger
Gold is setup in Continuous
Mode at a sampling rate of
1 second, the battery will be
depleted in approximately 4
months.
If a Levelogger Junior or
LTC Levelogger Junior are
used at a sampling rate of 5
seconds, the battery will be
depleted in approximately
2.5 months.
Note:
The Levelogger
Junior and LTC
Levelogger Junior
record using the linear
sampling mode only. The
LTC Levelogger Junior has
a minimum sampling rate of
5 seconds.
Note:
In Event-based
sampling
mode, battery
consumption is mainly a
function of sampling rate.
Therefore, with a smaller
sampling interval, battery
power will be used up quickly
whether readings are stored
or not.
Note:
In Event-based
sampling mode,
the Levelogger
Gold has a total memory of
25,000 readings of level and
temperature.