Ambient Weather WS-1090 User manual

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Ambient Weather WS-1090 Wireless Home Weather
Station User Manual
Table of Contents
1. Introduction.....................................................................................................................................2
2. Warnings and Cautions....................................................................................................................2
3. Getting Started ................................................................................................................................2
3.1 Parts List.................................................................................................................................2
3.2 Recommend Tools..................................................................................................................3
3.3 Sensor Assembly Set Up ........................................................................................................3
3.4 Display Console .....................................................................................................................9
3.4.1 Display Console Layout.....................................................................................................9
3.4.1 Initial Display Console Set Up.........................................................................................10
3.4.2 Radio Controlled Clock (RCC)........................................................................................ 11
3.4.3 Sensor Operation Verification.......................................................................................... 11
4. Weather Station Installation ..........................................................................................................11
4.1 Pre Installation Checkout..................................................................................................... 11
4.2 Site Survey ........................................................................................................................... 11
4.3 Final Installation of Sensor Array.........................................................................................12
5. Console Operation.........................................................................................................................12
5.1 Indoor Temperature..............................................................................................................12
5.2 Outdoor Temperature, Wind Chill and Dew Point ...............................................................13
5.3 Indoor Humidity...................................................................................................................14
5.4 Outdoor Humidity ................................................................................................................15
5.5 Wind Speed ..........................................................................................................................16
5.6 Rain......................................................................................................................................16
5.7 Weather Forecast (Tendency)...............................................................................................17
5.8 Barometric Pressure .............................................................................................................18
5.9 Pressure Graph .....................................................................................................................20
5.10 Time .....................................................................................................................................20
5.11 Date......................................................................................................................................21
5.12 Memory................................................................................................................................22
6. PC Software ..................................................................................................................................23
6.1 EasyWeather Overview........................................................................................................23
6.2 Connect PC Connection .......................................................................................................24
6.3 EasyWeather Software Installation.......................................................................................24
6.4 Run EasyWeather .................................................................................................................24
6.5 EasyWeather Features ..........................................................................................................24
6.5.1 Main Display....................................................................................................................24
6.5.2 Set-up and Alarms............................................................................................................25
6.5.3 Alarm Values....................................................................................................................26
6.5.4 Historical Highs and Lows...............................................................................................27
6.5.5 Historical Data .................................................................................................................28
6.5.6 Graph Data.......................................................................................................................29
6.5.7 EasyWeather Legal Notes ................................................................................................30
7. Glossary of Terms .........................................................................................................................30

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8. Specifications................................................................................................................................31
8.1 Wireless Specifications ........................................................................................................31
8.2 Measurement Specifications.................................................................................................31
8.3 Power Consumption.............................................................................................................31
8.4 Cable Lengths.......................................................................................................................31
9. Troubleshooting Guide..................................................................................................................32
10. Accessories...............................................................................................................................33
11. Liability Disclaimer..................................................................................................................35
12. FCC Statement..........................................................................................................................35
13. Warranty Information ...............................................................................................................36
1. Introduction
Thank you for your purchase of the Ambient Weather WS-1090 wireless weather station. The
following user guide provides step by step instructions for installation, operation and troubleshooting.
To download the latest manual and additional troubleshooting tips, please visit:
http://ambientweather.wikispaces.com/ws1080
2. Warnings and Cautions
Warning: Any metal object may attract a lightning strike, including your weather station
mounting pole. Never install the weather station in a storm.
Warning: Installing your weather station in a high location may result in injury or death.
Perform as much of the initial check out and operation on the ground and inside a building or home.
Only install the weather station on a clear, dry day.
3. Getting Started
The WS-1090 weather station consists of a display console (receiver), a thermo-hygrometer
transmitter unit, a wind direction sensor, a wind speed sensor, a rain gauge, mounting hardware, USB
cable and a PC software package on CD-ROM.
3.1 Parts List
QTY
Item
1
Display Console
Frame Dimensions (LxWxH): 9” x 5 ¾” x 1 ¼”
LCD Dimensions (LxW): 5 ¾” x 4 ¼”
1
Thermo-hygrometer transmitter
1
Thermo-hygrometer transmitter mounting bracket
1
Thermo-hygrometer transmitter radiation shield
1
Wind direction sensor
1
Wind speed sensor
1
Anemometer mounting arm (L: 12”)
1
Rain gauge

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1
Rain gauge mounting bracket
1
USB cable (L: 41”)
1
Easy Weather CD
3
1” nuts and bolts (long)
1
13/16” bolt (short)
1
½” set screw (long)
1
3/8”set screw (short) (Optional)
1
Upper pole (L: 12”)
1
Lower pole (L: 12”)
4
Zip ties
2
Hose clamps (2 ¾” diameter)
3.2 Recommend Tools
Precision screwdriver (for small Phillips screws)
Pliers
Phillips screwdriver
Flat blade screwdriver
Tack (small) hammer or rubber mallet
Compass or GPS (for wind direction calibration)
3.3 Sensor Assembly Set Up
1. Connect the wind cup assembly to either end of the anemometer mounting arm. Align the
holes, and fasten with long bolt and nut. Tighten with precision screwdriver while securing
the nut with pliers, as shown in Figure 1.
Figure 1
2. Connect the wind vane assembly to the other end of the anemometer mounting arm. Align the

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holes, and fasten with long bolt and nut. Tighten with precision screwdriver while securing
the nut with pliers, as shown in Figure 2.
Figure 2

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3. Connect the anemometer assembly to the top mounting pole, align the holes, and fasten with
short set screw (optional) and long bolt and nut. Tighten with precision screwdriver while
securing the nut with pliers, as shown in Figure 3.
Note: This may be a tight fit –rotate the pole back and forth to shave off some of the
plastic, and use a small hammer to tap the top of the anemometer mounting arm while
securing the pole on a solid, flat surface. Use a piece of cloth or padding to dampen the
hammer and avoid damage to the anemometer mounting arm.
Figure 3
4. Connect the rain gauge with long set screw. Tighten with precision screwdriver, as shown in
Figure 4.
Note: There may be a slight “play”in the rain gauge and the screw may not be flush.
Do not force the screw.
Attach the rain gauge mounting arm to the upper mounting pole, at right angles to the wind
speed and wind direction assembly to avoid obstruction of rainfall.
Note: There are two mounting holes on the side of the rain gauge in the event you wish to
mount the rain gauge in a different location than the mounting arm

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Figure 4

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5. Connect the thermo-hygrometer with short bolt and nut. Tighten with precision screwdriver,
as shown in Figure 5. Slide the radiation shield over the thermo-hygrometer after connecting
the cables from the anemometer and rain gauge (step 7). Attach to the thermo-hygrometer
mounting arm to the upper mounting pole.
Figure 5
6. Fasten the lower mounting pole (which is swaged on the top end) to your mounting pole or
bracket (purchased separately) with the hose clamps. Tighten the lower mounting pole to your
mounting pole with the hose clamps with a flat head screw driver, as shown in Figure 6.
Slide the top weather station pole (with the sensor array) into the lower pole (connected to
your mounting pole) when your station is finally mounted.
When you install the weather station, you will need to calibrate the anemometer pointer to
true north. True north can be estimated with a compass (which points to magnetic north) or a
GPS, which provides true north. Wind direction is defined as the direction the wind is coming
from (example, Winds from the north).
Note the four channels on the side of the wind vane. Each quadrant is labeled North, South,
East and West (reference Figure 6 as an example for “E” or East). Locate the North direction
(“N”) and mark it with a piece of tape for future reference. You will need this for wind
direction calibration upon final assembly.

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Figure 6
Connect the wind speed cable to the wind direction phone jack, as shown in Figure 7. Connect the
wind direction cable to the thermo-hygrometer phone jack (reference the label on the
thermo-hygrometer). Connect the rain gauge cable to the thermo-hygrometer phone jack (reference the
label on the thermo-hygrometer).
Insert two AA batteries in the thermo-hygrometer. The transmitter LED will light up momentarily (4
seconds), and then flash once every 48 seconds for each transmission update.
Note: We recommend installing Lithium AA batteries:
http://www.ambientweather.com/enaaliba4pa.html
Lithium batteries provide longer life and operate in colder temperatures.
Install the solar shield over the thermo-hygrometer/transmitter, and use the enclosed zip ties to clean
up the cables.

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Figure 7
3.4 Display Console
3.4.1 Display Console Layout
Note: All display console touch screen commands are issued by touching (not pressing) the
related areas as shown in Figure 8. Pressing hard on the display console may damage the unit.
The touch screen LCD monitor is laid out as follows:
Left Top LCD: IN-OUT temperature and humidity
Right Top LCD: Wind and Rain measurement
Left Middle LCD: Weather Forecast (Tendency)
Right Middle LCD: Air Pressure andAir Pressure History
Bottom Line LCD: Time and Date, Memory Data Usage
Note: The presence of the "Alarm-On icon" in the section means that the particular alarm has
been enabled.

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Figure 8
3.4.1 Initial Display Console Set Up
Note: The sensor array must be powered and updating before powering up the console, or the
console will give up searching for the sensors. Perform this step last.
Make certain the weather station sensor array is at least 10’ away from the console and within 300’ of
the console. If the weather station is too close or two far away, it will not receive a proper signal.
Insert three AA batteries into the battery compartment on the back of the display. After inserting the
batteries into the console, all of the LCD segments will light up for a few seconds to verify all
segments are operating properly.
The unit will instantly display indoor temperature, humidity, barometer, tendency, date and time.
The wind speed, wind direction, rain, and outdoor temperature and humidity will update on the
display within a few minutes. Do not touch the LCD until the outside transmitter report in, otherwise
the outdoor sensor search mode will be terminated. When the outdoor transmitter data has been
received, the console will automatically switch to the normal mode from which all further settings can
be performed.
If it does not update, please reference the troubleshooting guide in Section 9.
Note: When making an adjustment to a parameter, touch the flashing +, ON/OFF or –symbols in

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the tendency section of the display to increase, set or decrease values. Every time you touch the
screen, the backlight will light up and a beep will sound. After 30 seconds of inactivity, the LCD will
automatically revert to the normal display mode (automatic time out).
3.4.2 Radio Controlled Clock (RCC)
After the remote sensor is powered up, the sensor will transmit weather data for 30 seconds, and then
the sensor will begin radio controlled clock (RCC) reception. During the RCC time reception period
(maximum 10 minutes), no weather data will be transmitted to avoid interference.
If the signal reception is not successful within 1 minute, the signal search will be cancelled and will
automatically resume every two hours until the signal is successfully captured. The regular RF link
will resume once RCC reception routine is finished. In some locations, RCC reception may take a
couple of days to receive the signal.
3.4.3 Sensor Operation Verification
The following steps verify proper operation of the sensors prior to installing the sensor array.
1. Verify proper operation of the rain gauge. Tip the sensor array back and forth several times.
You should hear a “clicking” sound within the rain gauge. Verify the rain reading on the
display console is not reading 0.00. Each “click” represents 0.01 inches of rainfall.
2. Verify proper operation of the wind direction. Align the wind vane pointer to North (as
determined in Section 3.3). Verify the display reads North. Repeat for each quadrant (North,
South, East, and West).
3. Verify proper operating of the wind speed. Rotate the wind cups manually or with a fan.
Verify the wind speed is not reading 0.0.
4. Verify proper operation of the indoor and outdoor temperature. Verify the indoor and
outdoor temperature match closely with the console and sensor array in the same location
(about 10’ apart). The sensors should be within 4°F (2°C) (the accuracy is ± 2°F / 1°C).
Allow about 30 minutes for both sensors to stabilize.
5. Verify proper operation of the indoor and outdoor humidity. Verify the indoor and
outdoor humidity match closely with the console and sensor array in the same location (about
10’ apart). The sensors should be within 8% (the accuracy is ± 4%). Allow about 30 minutes
for both sensors to stabilize.
4. Weather Station Installation
4.1 Pre Installation Checkout
Before installing your weather station in the permanent location, we recommend operating the weather
station for one week in a temporary location with easy access. This will allow you to check out all of
the functions, insure proper operation, and familiarize you with the weather station and calibration
procedures. This will also allow you to test the wireless range of the weather station.
4.2 Site Survey
Perform a site survey before installing the weather station. Consider the following:
1. You must clean the rain gauge once per year and change the batteries every two years.
Provide easy access to the weather station.
2. Avoid radiant heat transfer from buildings and structures. In general, install the sensor array at

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least 5’ from any building, structure, ground, or roof top.
3. Avoid wind and rain obstructions. The rule of thumb is to install the sensor array at least four
times the distance of the height of the tallest obstruction. For example, if the building is 20’
tall, install 4 x 20’ = 80’ away. Use common sense. If the weather station is installed next to a
tall building, the wind and rain will not be accurate.
4. Wireless Range. The radio communication between receiver and transmitter in an open field
can reach a distance of up to 330 feet, providing there are no interfering obstacles such as
buildings, trees, vehicles, high voltage lines. Wireless signals will not penetrate metal
buildings.
5. Radio interference such as PCs, radios or TV sets can, in the worst case, entirely cut off radio
communication. Please take this into consideration when choosing console or mounting
locations.
6. Visit Ambient Weather Mounting Solutions for assistance and ideas for mounting your
weather station:
http://www.ambientweather.com/amwemoso.html
4.3 Final Installation of Sensor Array
Mount the weather station in the permanent location. To calibrate the wind direction, align the wind
direction pointer with the “N” marking on the side of the wind direction sensor, as described in
Section 3.3. Rotate the upper pole until the vane pointer, marking, and true north wind direction are
aligned.
5. Console Operation
Note: The programming procedure can be exited at any time by touching any other function area
(except “+”, “-” or “ON/OFF”).
The following procedures are initiated by touching the Touch Screen in the desired display area.
Note: You can also program the weather station console through the PC software (recommended).
5.1 Indoor Temperature
Figure 9
1. Touch the indoor temperature once, as shown in Figure 9. The indoor temperature will begin

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flashing and the +button and –button will be flashing (in the tendency section of the
display).
2. Indoor Temperature Units. Touch the +button or –button to alternate the display unit
between ℃and ℉(press the indoor temperature again if you wish to skip this setting).
3. Indoor Temperature High Alarm. Touch the INDOOR TEMPERATURE section again to
set the indoor temperature high alarm function. The +, ON/OFF and –button will be
flashing, and HI AL (high alarm) icon will light up.
Touch the +button or –button to change the value, or hold the +button or –button for 3
seconds to rapidly change the setting.
Touch the ON/OFF button to select the alarm on or off (if the alarm is enabled, the
speaker icon will be turned on, indicating the alarm function has been enabled).
4. Indoor Temperature Low Alarm. Touch the INDOOR TEMPERATURE section again to
set the indoor temperature low alarm function. The +, ON/OFF and –button will be
flashing, and LO AL (high alarm) icon will light up.
Touch the +button or –button to change the value, or hold the +button or –button for 3
seconds to rapidly change the setting.
Touch the ON/OFF button to select the alarm on or off (if the alarm is enabled, the
speaker icon will be turned on, indicating the alarm function has been enabled).
5. Indoor Temperature Record High. Touch the INDOOR TEMPERATURE section again
to display maximum indoor temperature record since the last reset. The maximum record
will be flashing, and the MAX icon will light up. To reset, press the maximum temperature
value for 3 seconds, and the maximum value will be reset to current reading.
6. Indoor Temperature Record Low. Touch the INDOOR TEMPERATURE section again to
display minimum indoor temperature record since the last reset. The minimum record will
be flashing, and the MIN icon will light up. To reset, press the minimum temperature value
for 3 seconds, and the minimum value will be reset to current reading.
5.2 Outdoor Temperature, Wind Chill and Dew Point
Figure 10

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1. Touch the outdoor temperature once, as shown in Figure 10. The outdoor temperature will
begin flashing and the +button and –button will be flashing (in the tendency section of the
display).
2. Outdoor Temperature, Wind chill and Dew Point. Touch the +button or –button to
alternate the display between the outdoor temperature, wind chill and dew point.
3. Outdoor Temperature Units. Touch the +button or –button to alternate the display unit
between ℃and ℉(press the outdoor temperature again if you wish to skip this setting).
4. Outdoor Temperature High Alarm. Touch the OUTDOOR TEMPERATURE section
again to set the outdoor temperature high alarm function. The +, ON/OFF and –button
will be flashing, and HI AL (high alarm) icon will light up.
Touch the +button or –button to change the value, or hold the +button or –button for 3
seconds to rapidly change the setting.
Touch the ON/OFF button to select the alarm on or off (if the alarm is enabled, the
speaker icon will be turned on, indicating the alarm function has been enabled).
5. Outdoor Temperature Low Alarm. Touch the OUTDOOR TEMPERATURE section
again to set the outdoor temperature low alarm function. The +, ON/OFF and –button
will be flashing, and LO AL (high alarm) icon will light up.
Touch the +button or –button to change the value, or hold the +button or –button for 3
seconds to rapidly change the setting.
Touch the ON/OFF button to select the alarm on or off (if the alarm is enabled, the
speaker icon will be turned on, indicating the alarm function has been enabled).
6. Outdoor Temperature Record High. Touch the OUTDOOR TEMPERATURE section
again to display maximum outdoor temperature record since the last reset. The maximum
record will be flashing, and the MAX icon will light up. To reset, press the maximum
temperature value for 3 seconds, and the maximum value will be reset to current reading.
7. Outdoor Temperature Record Low. Touch the OUTDOOR TEMPERATURE section
again to display minimum outdoor temperature record since the last reset. The minimum
record will be flashing, and the MIN icon will light up. To reset, press the minimum
temperature value for 3 seconds, and the minimum value will be reset to current reading.
8. Repeat the above steps for wind chill and dew point.
5.3 Indoor Humidity

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Figure 11
1. Touch the indoor humidity once, as shown in Figure 11. The indoor humidity will begin
flashing and the +button and –button will be flashing (in the tendency section of the
display).
2. Indoor Humidity High Alarm. Touch the INDOOR HUMIDITY section again to set the
indoor humidity high alarm function. The +, ON/OFF and –button will be flashing, and
HI AL (high alarm) icon will light up.
Touch the +button or –button to change the value, or hold the +button or –button for 3
seconds to rapidly change the setting.
Touch the ON/OFF button to select the alarm on or off (if the alarm is enabled, the
speaker icon will be turned on, indicating the alarm function has been enabled).
3. Indoor Humidity Low Alarm. Touch the INDOOR HUMIDITY section again to set the
indoor humidity low alarm function. The +, ON/OFF and –button will be flashing, and
LO AL (high alarm) icon will light up.
Touch the +button or –button to change the value, or hold the +button or –button for 3
seconds to rapidly change the setting.
Touch the ON/OFF button to select the alarm on or off (if the alarm is enabled, the
speaker icon will be turned on, indicating the alarm function has been enabled).
4. Indoor Humidity Record High. Touch the INDOOR HUMIDITY section again to display
maximum indoor humidity record since the last reset. The maximum record will be flashing,
and the MAX icon will light up. To reset, press the maximum temperature value for 3
seconds, and the maximum value will be reset to current reading.
5. Indoor Humidity Record Low. Touch the INDOOR HUMIDITY section again to display
minimum indoor humidity record since the last reset. The minimum record will be flashing,
and the MIN icon will light up. To reset, press the minimum temperature value for 3
seconds, and the minimum value will be reset to current reading.
5.4 Outdoor Humidity
Please reference Section 5.3. The outdoor procedure is similar to the indoor humidity procedure.

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5.5 Wind Speed
Figure 12
1. Touch the wind speed once, as shown in Figure 10. The wind speed will begin flashing and
the +button and –button will be flashing (in the tendency section of the display).
2. Average Wind Speed and Wind Gust. Touch the +button or –button to alternate the
display between the three minute Wind Average Speed and Gust Speed (and the
maximum wind speed in the update period).
3. Wind Speed Units. Touch the WINDSPEED again to set the wind speed units, and the +
button or –button to alternate the display unit between km/h, mph, m/s, knots, and bft (or
Beaufort scale) (press the wind speed again if you wish to skip this setting).
4. Wind Speed High Alarm. Touch the WIND SPEED section again to set the wind speed
high alarm function. The +, ON/OFF and –button will be flashing, and HI AL (high alarm)
icon will light up.
Touch the +button or –button to change the value, or hold the +button or –button for 3
seconds to rapidly change the setting.
Touch the ON/OFF button to select the alarm on or off (if the alarm is enabled, the
speaker icon will be turned on, indicating the alarm function has been enabled).
5. Wind Direction Alarm. Touch the WIND SPEED section again to set the wind direction
alarm function. The +, ON/OFF and –button will be flashing, and the wind direction
arrow will start to flashing.
Touch the +button or –button to change the value.
Touch the ON/OFF button to select the alarm on or off (if the alarm is enabled, the
speaker icon will be turned on, indicating the alarm function has been enabled).
6. Wind Speed Record High. Touch the WIND SPEED section again to display maximum
wind speed record since the last reset. The maximum record will be flashing, and the MAX
icon will light up. To reset, press the wind speed value for 3 seconds, and the maximum
value will be reset to current reading.
5.6 Rain

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Figure 13
1. Touch the rain once, as shown in Figure 13. The rain will begin flashing and the +button
and –button will be flashing (in the tendency section of the display).
2. Rain Increment. Touch the +button or –button to alternate the display unit between 1
hour, 24 hour, week, month and total rain (press the rain again if you wish to skip this
setting).
3. Rain Units. Touch the +button or –button to alternate the display unit between mm and
inch (press the rain again if you wish to skip this setting).
4. Rain High Alarm. Touch the RAIN section again to set the rain high alarm function. The
+, ON/OFF and –button will be flashing, and HI AL (high alarm) icon will light up.
Touch the +button or –button to change the value, or hold the +button or –button for 3
seconds to rapidly change the setting.
Touch the ON/OFF button to select the alarm on or off (if the alarm is enabled, the
speaker icon will be turned on, indicating the alarm function has been enabled).
5. Rain Record High. Touch the RAIN section again to display maximum outdoor rain
record since the last reset. The maximum record will be flashing, and the MAX icon will
light up. To reset, press the maximum rain value for 3 seconds, and the maximum value
will be reset to current reading.
6. Reset Rain. Touch the RAIN section again to reset the rain values. To reset, press the
rain value for 3 seconds and the 1 hour, 24 hour, week, month and total rain will reset to 0.
5.7 Weather Forecast (Tendency)
Note: The weather forecast or pressure tendency is based in the rate of change of barometric
pressure. In general, when the pressure increases, the weather improves (sunny to partly cloudy) and
when the pressure decreases, the weather degrades (cloudy to rain).
The weather forecast is an estimation or generalization of weather changes in the next 24 to 48 hours,
and varies from location to location. The tendency is simply a tool for projecting weather conditions
and is never to be relied upon as an accurate method to predict the weather.

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Figure 14
1. Touch the tendency once, as shown in Figure 14. The tendency will begin flashing and the
+button and –button will be flashing (in the tendency section of the display).
2. Change Tendency. Select the +button or –button to alternate the display unit between
SUNNY, PARTLY CLOUDY and CLOUDY, and RAINY (press the tendency again if you
wish to skip this setting).
3. Pressure Threshold. Touch the TENDENCY section again, and the +button and –button
will be flashing. Touch the +button or –button to adjust the pressure threshold from 2.0 to
4.0 hPa/hr (the default is 2 hPa/hr).
4. Storm Threshold. Touch the TENDENCY section again, and the +button and –button
will be flashing. Touch the +button or –button to adjust the storm threshold from 3.0 to
9.0 hPa/hr (the default is 4 hPa/hr).
5.8 Barometric Pressure
Note: The weather station console displays two different pressures: absolute (measured) and
relative (corrected to sea-level).
To compare pressure conditions from one location to another, meteorologists correct pressure to
sea-level conditions. Because the air pressure decreases as you rise in altitude, the sea-level corrected
pressure (the pressure your location would be at if located at sea-level) is generally higher than your
measured pressure.
Thus, your absolute pressure may read 28.62 inHg (969 mb) at an altitude of 1000 feet (305 m), but
the relative pressure is 30.00 inHg (1016 mb).
The standard sea-level pressure is 29.92 in Hg (1013 mb). This is the average sea-level pressure
around the world. Relative pressure measurements greater than 29.92 inHg (1013 mb) are
considered high pressure and relative pressure measurements less than 29.92 inHg are considered low
pressure.
To determine the relative pressure for your location, locate an official reporting station near you (the
internet is best source for real time barometer conditions, such as Weather.com or Wunderground.com),
and set your weather station to match the official reporting station.

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Figure 15
1. Touch the PRESSURE once, as shown in Figure 15. The barometric pressure will begin
flashing and the +button and –button will be flashing (in the tendency section of the
display).
2. Relative vs. Absolute Pressure Display. Touch the +button or –button to alternate the
display unit between relative pressure and absolute pressure (press the PRESSURE
again if you wish to skip this setting).
3. Pressure Units. Touch the PRESSURE section again to change the pressure units.
Touch the +button or –button to alternate the display unit between hPa, inHg and mmHg.
4. Relative Pressure Calibration. Touch the PRESSURE section again to change the
relative pressure. The +, ON/OFF and –button will be flashing, and rel (relative pressure)
icon will flash.
Touch the +button or –button to change the value, or hold the +button or –button for 3
seconds to rapidly change the setting.
5. Pressure Rate of Change High Alarm. Touch the PRESSURE section again to set the
pressure rate of change (per hour) high alarm function. The +, ON/OFF and –button will
be flashing, and HI AL (high alarm) icon will light up.
Touch the +button or –button to change the value, or hold the +button or –button for 3
seconds to rapidly change the setting.
Touch the ON/OFF button to select the alarm on or off (if the alarm is enabled, the
speaker icon will be turned on, indicating the alarm function has been enabled).
6. Pressure Rate of Change Low Alarm. Touch the PRESSURE section again to set the
pressure rate of change (per hour) low alarm function. The +, ON/OFF and –button will
be flashing, and LO AL (high alarm) icon will light up.
Press the +button or –button to change the value, or hold the +button or –button for 3
seconds to rapidly change the setting.
Press the ON/OFF button to select the alarm on or off (if the alarm is enabled, the speaker
icon will be turned on, indicating the alarm function has been enabled).
7. Pressure Record High. Touch the PRESSURE section again to display maximum
pressure record since the last reset. The maximum record will be flashing, and the MAX
icon will light up. To reset, press the maximum pressure value for 3 seconds, and the
maximum value will be reset to current reading.

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8. Pressure Record Low. Touch the PRESSURE section again to display minimum
pressure record since the last reset. The minimum record will be flashing, and the MIN
icon will light up. To reset, press the pressure value for 3 seconds, and the minimum value
will be reset to current reading.
Note: when absolute pressure is selected, step 4 will be skipped.
5.9 Pressure Graph
Note: The weather station bar graph flashes from left to right to prevent screen burn in. This
feature cannot be turned off.
Touch the PRESSURE GRAPH once, as shown in Figure 15. The barometric pressure will begin
flashing and the +button and –button will be flashing (in the tendency section of the display).
Press the +button or –button to change the pressure history time axis between 12 hours and 24
hours.
5.10 Time
Figure 16
1. Display Contrast Level. Touch the TIME once, as shown in Figure 16. The display contrast
value will begin flashing (example, lcd0 thru lcd8), and the +button and –button will be
flashing (in the tendency section of the display).
Press the +button or –button to adjust the contrast level from 0 to 8. (the default is 5).
2. Time Zone. Touch the TIME button again to display the time zone. The time zone value will
begin flashing and the +button and –button will be flashing (in the tendency section of the
display).
Press the +button or –button to adjust the time zone from -12 to 12, based on the
number of hours from Coordinated Universal Time, or Greenwich Mean Time (GMT).
The following table provides times zones throughout the world. Locations in the eastern
hemisphere are positive, and locations in the western hemisphere are negative.
Hours from
GMT
Time Zone
Cities
-12
IDLW: International Date Line West
---
-11
NT: Nome
Nome, AK
-10
AHST: Alaska-Hawaii Standard
CAT: Central Alaska
HST: Hawaii Standard
Honolulu, HI
-9
YST: Yukon Standard
Yukon Territory