8.20 Rainfall 1 Hour Alarm Setting
1) Place your cursor over the rain 1 hour alarm box and right click the mouse to open the rain 1 hour alarm
window
2) Drag the cursor over the sliding scale to set the desired rainfall level or enter the rainfall in the box
provided
3) Click the alarm active box to set the alarm
4) Click the set button to confirm
5) The rainfall 1 hour alarm is now set and will activate when the set rainfall level is reached within a 1 hour
period (for setting the rainfall 1 hour alarm from the base station, see main instruction manual).
Note:
The alarm bell icon may not appear immediately on the Heavy Weather program since it may take few
seconds for the program to calculate and confirm the setting
Once the alarm is entered into the Heavy Weather program, the information will be transferred to the
base station. In some situations, the alarm icon may not appear immediately on the base station’s
LCD but will appear after a short delay due the constant data communication between all the
sensors, base station and the PC.
8.21 General Alarm Icon
The general alarm icon will light up when any weather condition has been met for the weather alarm settings.
This notifies the user that a set weather alarm condition has been reached. To cancel and prpapre the
general alarm icon for the next weather event simply right click the mouse to enter clear general alarm window
and press the clear button.
8.22 Weather Alarm Notes:
To compensate for fluctuation of the weather data, which may cause the weather alarms to sound constantly if
the received data from the sensors is close to user set level, a hysteresis function has been implemented for
each weather alarm. For example, if the temperature high alarm is set to
+77°F
and the current temperature
value moves to
+78°F
, the alarm will be activated. When the temperature drops to
+76°F
or below and
thereafter again increases to beyond
+77°F
, the alarm bell icon will blink, but no alarm will be sounded. The
temperature has to drop to below
+75.2°F
(with a pre-set hysteresis of
1.8°F
) so that the alarm can be
produced. This function will compensates for the need of constant and unnecessary alarm sounds
Hysteresis values created are given in the following table:
Condition Hysteresis
Temperature
1.8ºF
Humidity 3%
RH
Air pressure
0.0295 inHg
Rainfall 24h
0.1968 inch
Rainfall 1h
0.01968 inch
Wind
3.1 mph
