Xylem GL500-2-1 Data Logger - Manual (Page 22)

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Alarm Times: Check the box
associated with each alarm to
enable that feature and enter
the desired start or stop time.
The logger will start at the next
occurrence of the Alarm 1 time and stop at the next occurrence of the Alarm 2 time
after the Alarm 1 timer has expired. Either or both alarms can be enabled
Note: The alarm start and stop cycle is a one time occurrence. Once stopped
by the Alarm 2 timer, the logger will not resume logging again until the logger
is reprogrammed. Reprogramming the logger with the timers enabled will
restart the alarm cycle. Reprogramming the logger with the timers disabled
will return the logger to a normal logging state
Use care when programming the alarm times. If left enabled, changing and
reprogramming any of the setup parameters will restart the alarm timers and
could cause the logger to stop recording.
XIV. Analog Setup:
The Analog Setup screen sets the
engineering units and calibration
numbers for each of the analog
channels, the endpoints of the bar
graphs in the main screen and
which of the analog channels are
enabled. These channels are
calibrated in the same way so a
single channel will be discussed.
It is important to note here that the
information stored in the data
logger’s memory is just the
sensors output level before it is adjusted by the following calibration parameters.
These parameters are used to adjust the stored data for display and storage
purposes only, at the time the data is downloaded. If they are changed, the same
stored data can be downloaded again and the data will be scaled differently
according to the new settings.