LogTag Recorders LogTag Analyzer Temperature Recorder - Manual (Page 39)

Chapter 4 Preparing LogTag(s) for use 39
This table shows how different conditions would result in the Alert Indicator flashing or
not:
What the LogTag recorded What the LogTag indicated
2 readings of 20ºC or above, return to
normal, 8 readings at 0ºC or below, return
to normal, 4 readings of 20ºC or above,
return to normal
Neither alert condition is met.
The maximum number of consecutive
out-of-spec readings is only 2 (5 required, the 8
readings below 0ºC do not count towards alert
readings).
The total out-of-range events equals 2 + 4 = 6.
The alert condition is 7 total, so the alert does
not go off, as again the 8 readings below 0ºC
do not count towards alert readings.
No Flashing Red Alert Indicator
4 readings of 20ºC or above, return to
normal, 4 readings of 20ºC or above
The first alert condition is not met, as the the
maximum number of consecutive out-of-spec
readings is only 4 (5 required.)
The second alert condition however IS met
since the total out-of-range events equals 4 + 4
= 8. The alert condition is 7 total. so the alert
DOES go off.
Flashing Red Alert Indicator
Separate alert conditions are useful if you expect the monitored product to encounter
temperatures lower than the lowest possible alert temperature. In this case a flashing
alert indicator may not necessarily indicate an unfavourable condition was encountered.
In programs where such conditions are monitored the lower alert should be turned off.