only stops when the logger memory is full, when the batteries are depleted, or when the LI-19
is switched off. The PC software can be used to check the logging activities of the LI-19, and
the LI-19 also shows some display characters to indicate what it is doing.
Log interval
The log interval is entered in seconds. The pull-down box can be used to preset the correct
number of seconds for some popular log intervals. Note that the pull-down is only used for
selecting a preset, the number on the left is the log interval that will be transferred to, and
used by, the data logger in the LI-19.
Initial delay
When logging starts, an optional delay is used to postpone the start of the first logging interval
until a specified date and time. This date and time at which the first interval will start, can be
entered in the PC software. When the logger is busy counting down the delay for the first
logging interval, the LCD on the LI-19 shows an ‘l’ that flashes at a slow ( 1 second on, one
second off) rate.
Logging
Once the initial delay has elapsed (the initial delay can be 0) the first logging interval is
started. The LI-19 is now actually logging, and the ‘l’ on the LCD flashes rapidly ( ½ second
on, ½ second off)
Logged values
During a logging interval, the LI-19 accumulates minimum input value, maximum input value,
and average input value. Once the logging interval has elapsed, the values are stored in the
logger memory and the next interval is started. Each time the LI-19 stores a new set of values
in the logger memory, it flashes the ‘m’ sign on the display. Logging only stops when the
logger memory is full, when the batteries are depleted, or when the LI-19 is switched off.
Read status
You can view the logger status while the logger is active. Reading the status will not interfere
with the logging process.
The status will show what the logger is doing, how much time remains in the current interval
(if the logger is logging) and what the measured values are. The logger measures an integral
over the logging interval. The PC software uses the integral and the interval period to
calculate an average value over the logging interval.
Summary of Contents for LI-19
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