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Simple Logger
®
II Series
4.8.5 Recording Session has Ended
The logger will be in STANDBY mode if one of the following occurs:
•
The session terminates due to recording end time being reached.
•
The recording in START/STOP mode fills the memory.
•
The user terminates the session by pressing the
PRESS
button
until the STOP (ORANGE) LED lights up and releasing the button
before the next LED lights, or issues a Stop Recording command
from the Simple Logger II Control Panel.
The logger is now ready for a new session or download. Pressing the
PRESS
button until the START (GREEN) LED lights up and releasing the
button before the next LED lights, will start a new session depending on
the available memory.
4.9 Event Logger Operation
(Model L404)
The Model L404 monitors up to four channels for the occurrence of events
and stores information about each event. The rate at which each input is
tested for the event status is defined by the sample period.
Events that are shorter in duration than the period between sampling can
potentially be missed. For this reason the sample period should be chosen
to be at least twice the fastest event rate, e.g. an event being monitored
is expected to occur no faster than once per minute. The sample period
should then be set to at least every 30 seconds.
An event starts when the input goes low and ends when the input goes
high. For contact closure this would be when the contact is closed and
then opened. The logger records the time the event started and the dura
-
tion of the event. The accuracy of the start time and duration is limited to
the rate at which the inputs are tested (as defined by the sample period).
An option to invert the displayed graph is available in the Configuration
dialog box’s Scales tab in the Simple Logger II Control Panel. This allows
for setting the display to show a high as a low for all inputs. This is the
default state and will be shown as normally low until an event occurs.
As mentioned previously, events start and end when the input goes low
and when it goes high (regardless of the graph invert option). For voltage
measurements this is when the voltage drops below 0.7V and goes above
0.8V. For contact (relay) closures this is when the contact closes and when
it opens. Overload will be displayed when the input rises above 5.5V.
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