16.
Auto memory for stored values
When a set weather alarm condition has been activated, that particular alarm
will sound and flash for approximately 2 minutes but will continue to flash until
weather conditions have become more steady.
The base station has a memory back up system, which is used to memorize
user-defined settings for when the batteries are changed or if a power failure
occurs. User defined units are automatically updated each time these are
changed. The base station will memorize the following user defined units:
Weather Alarms
The weather alarms are settable for when certain weather conditions are met
according to the users requirements. For example, the user can set the
thresholds for the outdoor temperature to +86°F (high) and 14°F (low), while
only enabling the high alarm and disabling the low alarm (i.e. temperatures
<14°F won’t trigger alarm, but temperatures >+86°F will).
•
Time zone
•
12/24h time display mode
•
Unit settings (temperature, pressure, rainfall, wind)
•
Air pressure offset for calculation of relative air pressure
Alarm setting
Minimum
Maximum
Storm threshold
0.09 inHg
0.27 inHg
Relative Air Pressure
27.10 inHg
31.89 inHg
Outdoor Temperature
-21.8°F
+157.8°F
Indoor Temperature
14.1°F. No alarm will
sound if the minimum
indoor temperature alarm
is set below this value.
+139.8°F
Humidity (all)
20% RH
95% RH
Rainfall 24h
0.0 inch
39.37 inch
Rainfall 1h
0.0 inch
39.37 inch
Wind
0.0 mph
111.8 mph
•
Weather picture threshold
•
Storm warning threshold
•
LCD contrast
•
Alarm time
•
Weather Alarm thresholds
•
State of alarms (enabled/disabled)
•
Rainfall total value and reset time/date
17. Accessories: adding cable extensions
For your convenience, additional telephone cables to increase the connection
distance between each of the units may be purchased from any reputable
hardware store. Simply add these to the current cables to extend your cable
connection distance.
Hysteresis
To compensate for fluctuation of the measured data, which may cause the
weather alarm to sound constantly if the measured reading is close to user set
level, a hysteresis function has been implemented for each weather alarm.
For example, if the high temperature alarm is set to +77°F and the current
value moves to +78°F, the alarm will be activated (if it has been enabled). Now
when the temperature drops to +76°F or below and thereafter again increases
to 77°F, the data will be blinking, but no alarm will be activated. It has
to drop to below +75.2°F (with a pre-set hysteresis of 1.8°F) so that the alarm
can be produced again. Hysteresis values for the various weather data types
are given in the following table:
Weather data
Hysteresis
Temperature
1.8°F
Humidity
3% RH
Air pressure
0.0295 inHg
Rainfall 24h
0.1968 inch
Rainfall 1h
0.01968 inch
Wind
3.1 mph
Telephone Extension Cables
When securing the cables during mounting, ensure that base station can
receive the weather data since increasing the cables lengths may also
increase levels of interference and result with reception difficulties.
Interference levels will greatly depend on the surrounding area for example
setting up on or near metal piping may considerably reduce reception.
