La Crosse Technology Professional Remote Weather Station - Manual (Page 8)

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3) Set the desired inHg pressure value (9, 12, 15, 18, 21, 24, 27
inHg) using the PLUS (+) or MINUS (-) keys
4) Press the MIN/MAX key to confirm and return to the normal
display.
Storm warning alarm ON/OFF
After storm warning alarm setting, the next mode to appear after
pressing the SET key is the storm warning ON/OFF. Use the PLUS
(+) or MINUS (-) key to change the status to AON or AOFF. Default
setting is ON:
Should the air pressure drop equal or below the pre-set inHg value
within the last 6 hour period, then the downward tendency arrow will
flash as an indication of possible storm. The base station will take
hourly measurements as a point of reference. The storm-warning
indicator will stop flashing once the air pressure becomes more
stable.
Master Alarm – BUZZER OFF
The time and all the weather alarms may have buzzer sound set to
OFF by holding the MINUS (-) key down for about 3 seconds in
normal display mode and the BUZZER OFF icon appears on the
bottom left of the LCD. When the BUZZER OFF is displayed, the
time and all other weather alarms when activated will only flash but
not sound regardless if that particular alarm has been set to the ON.
To deactivate the BUZZER OFF, press the MINUS (-) key once more.
General Alarm Icon
The general alarm icon on the bottom right corner of the LCD will
appear when any weather alarm is activated to show the user that a
set weather condition has been reached. The activated alarm can be
determined by checking the set alarm values against the MIN/MAX
values reached. To deactivate the general weather alarm icon, press
the ALARM key.
Important
When entering the alarm set mode for a specific weather or
temperature condition, the corresponding alarm is automatically
enabled (ON) when the SET key is pressed, regardless of its previous
setting and the alarm value will flash to indicate that it has been
activated. Press the ALARM key to confirm the setting and continue
pressing the ALARM key to toggle through each alarm mode until it
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returns to the normal display mode or press the MIN/MAX key at any
time to exit the alarm setting modes.
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.
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).
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) 1% RH 99% RH
Rainfall 24h 0.0 inch 39.37 inch
Rainfall 1h 0.0 inch 39.37 inch
Wind 0.0 mph 111.8 mph
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 beyond +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:
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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
16.
Auto memory for stored values
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:
• Time zone
• 12/24h time display mode
• Unit settings (temperature, pressure, rainfall, wind)
• Air pressure offset for calculation of relative air pressure
• 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.
Telephone Extension Cables
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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.
For best results, do not to add more than 32ft of extension cable from
item to item onto the existing cable lengths as this may reduce
reception levels. Again, reception and interference levels will greatly
depend on the surrounding environment at your point of mounting.
Note:
It is important to keep all the connected extension heads away from
rain, moisture and other extreme weather conditions as exposure can
cause short circuits and damage to this item.
18. Changing
batteries
Battery change only in the thermo-hygro-sensor:
1. Open the battery cover
2. Remove the old batteries and insert with new ones of the
recommended type and replace the cover
Once the sensor is powered up, press and hold the PLUS (+) key for
approx. 2 seconds in the normal display mode, the base station will
sound a short beep and synchronize to the sensor otherwise no
weather data will be received.
Battery change only in the base station:
1. Connect power adaptor to base station and power outlet.
2. Open the battery cover located at the back of the base station.
3. Remove the old batteries, insert with new ones of the
recommended type and replace the cover
This method of battery replacement will result in no loss of MIN/MAX
and history data. However in case of possible power failure, the base
station will lose the MIX/MAX and all weather data recordings and will
need to be synchronized to the sensors again by pressing the PLUS
(+) key for 2 seconds.