Boltek Lightning/2000 - Manual (Page 97)

R E A L - T I M E L I G H T N I N G D E T E C T I O N
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these counters invisible by default was made after realizing
that there were already more than enough counters for most
users to watch during a storm.
When Lightning/2000 is in flash mode (as opposed to stroke
mode), these counters show the rate of change in the number
of flashes instead of the number of strokes.
IC Stroke Rate Change Counter
The IC stroke rate change counter, shown with and without an alert bar.
Default yellow alert trigger level: 25
Default red alert trigger level: 50
Record kept: No
The IC stroke rate change counter shows the
percentage change in the IC (intercloud/intracloud)
stroke rate between one minute ago and now.
For example, if the IC stroke rate one minute ago was
1 and the IC stroke rate now is 3, then this counter
would indicate “+200%”.
If the stroke rate one minute ago was zero, and the
current stroke rate is zero, "--" is displayed. If the
stroke rate one minute ago was zero, and the current
stroke rate is non-zero, "*" is displayed.
A sudden change in the IC stroke rate may signal a
change in the character of a storm and could indicate
behavior that needs to be monitored.
When you specify a trigger level for the red or yellow
alert, you are specifying the percentage change that
must occur if the IC stroke rate is 100 strokes per
minute. The percentage change that is needed for