Boltek Lightning/2000 - Manual (Page 20)

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And with the custom summary, you can construct your own
criteria for what constitutes an alert and change the general
status alert level independently.
Because of the inexact nature of the analysis process, it is not
uncommon for a general status alert to be displayed when a
storm is still some distance away. The alternative would have
been to not display an alert when a storm was potentially
nearby. In general, more false alarms will occur than missed
alerts. Missed alerts are less common.
With the advent of Lightning/2000 v4.6, the ability to
determine – in many cases – when an individual
lightning flash is relatively nearby became possible
.
When such flashes are detected, a special “storm” is depicted.
Rather than being a wedge shape, these special nearby storms
are circular or elliptical. When one of these storms is shown,
there is an excellent chance that lightning is imminent or is
occurring in the immediate area.
Please do not contact Aninoquisi when a false alarm occurs.
This is a normal part of the operation of Lightning/2000. We
are constantly striving to reduce the incidence of false alarms.
Check our website regularly for updates of Lightning/2000
components.
The Boltek Hardware
For Lightning/2000 to be able to detect and display live
lightning data, one of the Boltek lightning detection hardware
systems must be connected to the computer.
There are currently four hardware choices: the StormTracker
PCI card or StormTracker ISA card (no longer in
production), both of which install inside your computer, the
LD-250, which connects to your computer via the serial port