LogTag Recorders UTREL30-16 Product User Manual page 17

Preparing a UTREL30-16 for first use
If an alarm trigger condition requires readings to exceed an upper threshold temperature it
is called an upper alarm . If an alarm trigger condition requires readings to go below a
lower threshold it is called a lower alarm .
All alarm trigger conditions are configured in the Alarm Settings tab during configuration
of the logger with LogTag
The screen shows an example where:
the upper primary alarm is triggered when the temperature is -70.0 °C or above for
l
an accumulative time of 10 hours.
the lower primary alarm is triggered when the temperature is -80.0 °C or below
l
continuously for 1 hour.
Once an alarm has triggered, the alarm indicator ( ) remains shown until the alarm is
cleared (see Clearing an Alarm on
marker remains shown until midnight, then it turns off and the marker for the
previous day is shown (
previous day. When midnight passes next, this marker will move to
Alarm Re-triggering
A note on alarm re-triggering:
delay time (but not any others) resets to zero and alarm processing starts again.
The alarm processing for all other alarm delays is not affected. Therefore,
accumulative or consecutive alarms will re-trigger, if the alarm conditions are met
again, and the Alarm Indicator ( ) and the Day Alarm Marker (
even if any previous alarm was cleared. Clearing an Alarm does not reset any of
the delay values.
UTREL30-16 User Guide
®
Analyzer.
page 35) or the unit is reconfigured. The day alarm
) to indicate the alarm was registered against what is now the
As soon as an alarm is triggered, the corresponding
17
and so on.
) will be shown,