
Version 2.12
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Page 21
6.5.4
Lightning Icon
The lightning icon
appears when then Dew Point exceeds 70 ºF, which signifies temperature
and humidity conditions may be possible for lightning storms to form in the area.
6.5.5
PM2.5 Sensor (optional)
An optional PM2.5 sensor is available for the WS-2000. The display shows the current PM2.5
measurement, and the 24-hour running average, which is a better indication of the accumulative effect
of particulates on overall health.
The display features a color-coded icon with the following breakpoints:
AQI Category
Color
Breakpoints
(µg/m
3
)
Good
Green
0.0 – 12.0
Moderate
Yellow
12.1 – 35.4
Unhealthy for
Sensitive Groups
Orange
35.5 – 55.4
Unhealthy
Red
55.5 – 150.4
Very Unhealthy
Purple
150.5 – 250.4
Hazardous
Maroon
250.5 – 500
Figure 21
6.6
History Mode
6.6.1
Min/Max
View high and low records, and clear specific records in the history mode.
View and reset minimum and maximums.