iMiniPlus PDF Logger User Guide v2.0
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9.3.1 Specification and Alarm
Raise alarm on below lower spec readings
– tick this box if you want to activate the low alarm and select the value
in the box immediately to the right. Note if the lower spec value is 0
C, then the alarm is triggered at -0.1
C, not
0.0
C as this value is considered within specification.
Raise alarm on above upper spec readings
– tick this box if you want to activate the high alarm and select the
value in the box immediately to the right. Note if the upper spec value is 50
C, then the alarm is triggered at 50.1
C,
not 50.0
C as this value is considered within specification.
Increment
- the grouping size used for listing out-of-specification readings.
Alarm Type
This feature allows the user to specify the conditions that will trigger an alarm.
Standard Alarm
Number of consecutive out of specification readings
– the alarm is triggered if the readings are consecutively over
or under the specified threshold. For instance, if the upper spec is 50
C and the value for the number of consecutive
out-of-spec readings is 3 and the logging interval is 10minutes, the readings will need to be in excess of 50°C for 30
minutes before the alarm is triggered. If the readings fluctuate outside upper and lower threshold temperatures,
the same rule applies (providing the appropriate “raise alarm” box is ticked). Once the reading(s) return inside alarm
limits, the consecutive alarm is reset.
Total number of out of specification readings (cumulative) –
the alarm is triggered if the total number of out of
spec readings equals or exceeds the entered value. In this case the alarm is NOT reset if readings return to within
the specified parameters.
Do not set the Total number of out-of-spec readings value to be less than the Consecutive out-of-spec readings as this
will mean that the Consecutive out-of-spec readings alarm will never be triggered.
Degree-Minutes Alarm (Integrator Alarm)
The Degree-Minutes Alarm is a special feature that
“integrates” temperature and time parameters into one
value.
Total number of degree-minutes below specs exceeds
-
the alarm is triggered when the total number of
temperature degrees’ times the minute’s duration below
the low alarm spec is greater than the value entered.
Total number of degree-minutes above specs exceeds
-
the alarm is triggered when the total number of
temperature degrees’ times the minute’s duration above
the upper alarm spec is greater than the value entered.
Catastrophe Alarm
This alarm is always additional to the Standard and
Degree-Minute alarms and there is no delay. Do not set
Catastrophe Alarm inside normal alarm limits because other alarms will never be triggered.
Instantly raise alarm on readings below
- tick this box if you want to immediately trigger the low alarm and select
the value in the box immediately to the right. Note if the lower spec value is 0 °C, then the alarm is triggered at -0.1
°C, not 0.0 C as this value is considered within specification.
