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Alecto-logoAlecto WS-3850 Weather Station with Wireless Sensor

INTRODUCTION

The Alecto WS-3850 weather station consists of the following components:
Outdoor wind unit
The outdoor wind unit has a built-in wind speed meter, wind direction sensor, temperature sensor, humidity sensor, and DCF receiver. The measurement data from these sensors is transmitted wirelessly to the display unit. The outdoor wind unit is powered by 4 x AA 1,5 Volt batteries (excl.).The outdoor wind unit is supplied with mounting materials.
Outdoor rain unit
The outdoor rain unit has a built-in rain gauge. The measurement data from the sensor is transmitted wirelessly to the display unit. The outdoor rain unit is powered by 2 x AA 1,5 Volt batteries (excl.).
Indoor unit
The indoor unit receives the measurement data from the outdoor units and also has its own temperature sensor, humidity sensor and air pressure sensor. The indoor unit is powered by the supplied power adapter and 3 x AAA 1,5V batteries can be installed as a backup (excl.). All measurement data is displayed on the 7,5 ”/ 19,1 cm large colour LCD screen.
When using the adapter, the snooze/light button functions as a dimmer for the backlight in 4 steps. The backlight will remain off when using batteries only. When touching the snooze/light button, the screen will light up for 5 seconds.

OVERVIEW

Indoor unit

  1. Function keys
  2. Outside temperature & humidity display
  3. Wind speed display
  4. Rainfall display
  5. Mode” key
  6. Moon phase display
  7. “Settings” key
  8. Weather forecast display
  9. “Alarm clock” key
  10. Wind direction display
  11. “Channel” key
  12. Atmospheric pressure and atmospheric pressure trend animation
  13. “Up/+” key
  14. “Down/-” key
  15. Power adapter connection
  16. Day and month display
  17. Current time display
  18. Indoor temperature & humidity display
  19. Hanging slots
  20. Battery compartment for 3 x AAA, 1,5V batteries (excl.)

Outdoor unit wind

  1. Compass, for northern orientation of the outdoor unit
  2. Mast
  3. Battery compartment for 4 x AA 1,5V batteries (excl.)
  4.  Wind direction sensor
  5.   Location of temperature, humidity sensor and DCF receiver.
  6.  Wind speed sensor
  7.  Protective filter for collecting leaves and dirt
  8.  Rain gauge housing
  9.  Mounting feet
  10. Tab to detach housing
  11. Scoops for rain quantity measurement
  12.  Battery compartment for 2 x AA 1,5V batteries (excl.)

note
Due to poor or non-performance of normal Alkaline batteries at temperatures around or below 0°C, the use of standard Alkaline batteries is not recommended for the outdoor unit. For the outdoor units, we, therefore, recommend installing Lithium batteries which are designed to function within a temperature range of -20°C to 60°C. These batteries are available through the Alecto service department on telephone number 073 6411 355 (Netherlands) or 03 238 5666
(Belgium) or via the internet www.alecto.nl.
The battery life of Lithium batteries with a capacity of 900 mAh is more than a year.

Outdoor rain unit

INSTALLATION

Indoor unit
General installation and placement tips:

  • Ensure that the ambient temperature around the indoor unit is not affected by lamps, radiators, doors or windows, drafts, etc..
  • For hanging use: hang the unit free from obstructions, i.e. not behind a curtain, for example.
  • Make sure that the adapter cable cannot lead to falls or tripping. Secure the cable with cable ties if it is too long.

Power supply
The main power of the indoor unit is provided by the supplied power adapter. Insert the low voltage plug of the adapter into the DC5.0V connection on the right side of the indoor unit and connect the adapter to a 230V socket.
As a backup, to save the measurement data during a possible power failure or if the adapter is accidentally unplugged, 3 pcs 1,5V AAA batteries can be inserted. The light intensity setting will revert to the lowest setting after 5 seconds to increase battery life.

  1. Open the battery compartment at the back of the indoor unit.
  2.  Insert the first battery and slide it all the way to the left.
  3.  Insert the second battery and slide it all the way to the right.
  4.  Insert the third battery in the middle between the first 2 batteries.
  5. Finally, replace the battery cover.

Hang or stand

The indoor unit can either be placed freestanding on a cabinet or desk (fold out the stand on the back of the indoor unit for this purpose) or the unit can be hung on the wall (see keyhole openings on the back).

Outdoor units
General installation and placement tips:

  • First, check that the outdoor units are within reach of the indoor unit before permanently mounting the outdoor units. Keep the distance between the outdoor units and the indoor unit to within 30 meters.
  • Ensure that the outdoor units are placed at least 1,5 meters above the ground and freely exposed to the rain and wind.
  •  In order for the outdoor units to work as accurately as possible, they must stand as horizontal as possible. For the outdoor rain unit, check that the surface is level before mounting.
  •  To indicate which direction the wind is coming from, the outdoor wind unit must be oriented to the South. See the S designation at the bottom of the outdoor unit for this. Use the compass on the outdoor wind unit to correctly orientate the unit.
  •  Make sure the outdoor units hang and/or stand freely. The wind speed meter and the wind vane, in particular, should hang in direct wind.
  • Find a location where the likelihood of blowing leaves is minimal. Leaves blown into the rain coop can block the rain gauge or affect the measurement results. In any event, we advise you to place the outdoor units in such a way that it is fairly easy to remove any leaves and to replace the batteries.
  •  Perhaps the outdoor units can be located within reach for a week to try out all functions. Check that everything is functioning properly before placing the outdoor units in their permanent location.

Outdoor unit wind

Registration

First register the outdoor units with the indoor unit before permanent placement of the outdoor units Once the indoor unit batteries are installed, it will search for the outdoor units for the first 5 minutes. After the 5 minutes, the indoor unit can be manually set to receive. To do this, press the channel button for 2 seconds to set the indoor unit to receive mode. Insert 4 x 1,5V AA batteries in the outdoor wind unit. See diagram. Set the Channel switch to the same channel selected on the indoor unit. Then press the TX key. Check that the indoor unit has received the signal. Press the TX button once more, if necessary. The outdoor temperature and humidity are displayed on the indoor unit via the outdoor wind unit.

The outdoor wind unit is registered when the information appears on the display. To turn off the DCF-77 time reception, press the “WAVE” key. To turn the DCF-77 reception on again, register the outdoor unit once more by briefly removing and reinserting the batteries and repeating the registration procedure.

Installation

Insert the aluminium pole into the mounting base and fasten it with the screws provided. The mounting base can be mounted on a horizontal or vertical surface. Please note that the outdoor wind unit must still be orientated to the north. Make sure there is enough space to do this adequately. Screw the base to a wooden or stone wall using the supplied screws and plugs.
Slide the outdoor wind unit onto the pipe and fasten it with the screws provided. Orientate the outdoor wind unit using the compass to ensure the correct wind direction. The wind speed sensor, temperature, humidity, and wind direction part must be south facing. See diagram:

Outdoor rain unit

Registration

Remove the battery compartment screws at the bottom of the rain gauge. Slide the battery cover off the screw holes, and remove the battery cover. Insert 2 x 1,5V AA batteries in the battery compartment as shown in the diagram:

Install the battery within the 5 minute registration time of the indoor unit, or set the indoor unit to receive. If the indoor unit is set to receive, both the wind and rain unit should also register. Inserting the batteries is sufficient. As soon as the rain unit transmits, this is detected by the indoor unit and the —- disappears from the display. Replace the battery cover and secure it with the screws. This ensures that the batteries do not get wet. The batteries should be installed before mounting the rain gauge.

Installation

Place the rain gauge on a horizontal surface where the rain will not be obstructed. Fasten the rain gauge by inserting the screws through the legs. To replace the batteries, the rain gauge must first be unscrewed.

Cleaning

Remove grid plate and clean it. Remove all leaves from the rain gauge housing. Using an Allen key, the cover can be removed by pressing the internal tab and pulling the cover up.
In case of problems, the rain gauge can also be unscrewed. Then clean the scoop and all holes thoroughly. Replace the cover by clipping in the rear first and then by pressing until it clicks. Check that the cover is secured. Replace the grid plate.

BASIC DISPLAY AND SETTINGS

Indoor Temp and Humi

  1. Indoor temperature and indoor humidity.
  2. Indoor temperature display in °C or °F.
  3. Press to switch between °C or °F.
  4. Indoor humidity display in %.
  5. Adjustable temperature high/low alarm.
  6. Trend display higher, equal, or lower.

Outdoor Temp and Humi

  1. Display of outdoor unit wind channel 1, 2, 3, or alternating display.
  2. Outdoor temperature and humidity outdoors.
  3. Outdoor temperature display in °C or °F.
  4. Press to switch between °C or °F.
  5. Outdoor humidity display in %.
  6. Trend display higher, equal, or ower.
  7. Adjustable temperature high/low alarm.

Pressure Trend and Pressure

  1. Display of atmospheric pressure progress and barometric pressure with forecast by icons.
  2. View previous 12-hour atmospheric pressure progress and a total difference of 12 hPa.
  3. Atmospheric pressure value in:
  4. Ft, M, inHG, and hPa.
  5. Atmospheric pressure trend display
  6. 14 day learning mode.

Moon

  1. Moon phase display indication.
  2. The stars are displa anD 6.00

Clock

  1. Time display with date.
  2. DCF-77 indication time synchronization reception.
  3. Alarm clock with snooze function.

Wind

  1. Wind speed display with reception indication outdoor wind unit
  2. Wind direction display. The pointer indicates previous and current wind direction.  The wider triangle indicates the current wind direction.
  3. Wind speed is displayed in mph or km/h.

Rain

  1. Display amount of precipitation with the following time spans:
    1. total
    2. yesterday
    3. today
    4. last hour
    5. this week
  2. Precipitation displayin mm  or inches.
  3. Low battery indication of the rain unit.
  4. Reception signal indication.

Function keys

  1. Mode
  2. Set
  3. alarm
  4. channel
  5. down
  6. up
  7. Mode key: In nor al mode, press mode to view the various functions separately. If the mode key is not pressed for 1 seconds, the display will return to normal mode.
  8. Set key: In normal mode, press set to switch between °C and °F.
  9. alarm key: press alarm key to activate alarm 1, alarm 2, alarm 1 and 2 or no alarm.
  10. channel key: press channel key to switch between channel 1, channel 2, channel 3 or scan between channel 1, 2, and 3. Press and hold channel key for 2 seconds to activate reception of outdoor units with new ID. First select the desired channel.
  11. down key: to switch between rain display in total, today, last hour, yesterday and this week.
  12. up key: display of the lowest or highest measured value of the indoor and outdoor temperature and humidity and the maximum measured wind speed.

SETTING INDOOR UNIT

Mode

Use the mode button to select the desired adjustment function: Press Mode for the following settings date and time alarm time for the alarm clock height correction settingtemperature alarm setting for outdoor and indoor temperature rain gauge display extension in mm or inches wind speed display extension in km/h or mph

Date and time
The time and date are automatically received via DCF-77 receiver which receives the time data. This receiver is situated in the wind unit. The wind unit must be switched on for at least 5 minutes to receive the DCF-77 signal. If the channels of the wind unit and the indoor unit are the same, the outdoor temperature will be the first to appear in the display during registration. Followed later by the correct time. The wind unit must be switched on for approximately 2 minutes for the signal to be transmitted. Alternatively, you can use the TX button in the battery compartment to transmit manually. The wind unit should already be switched on for several minutes at this point. Once the DCF signal is received, the following icon will appear next to the time: . If DST appears below this icon ( ) then daylight saving time is active (DST – Day Saving Time).

Pressing the WAVE button for a few seconds will disable the reception of the DCF signal. Then wait a day and the DCF-77 receive symbol will disappear.  It is also possible to restart the indoor
unit. The received symbol will then also not appear. The time and date must then be re-set manually.

  • zone press the Mode key 1 x . Date and time setting is displayed press the Set key for 3 seconds Select zone starts to flash. Enter the desired value for the DCF time zone using the up and down keys. (In the DCF time zone of the Netherlands this is 0) The DCF time takes daylight saving time into account.
  • day name language
    Press the Set key again to continue setting the day in English, German, French, Italian, Dutch, Spanish or Danish. Select the desired language with up and down keys.
  • year Press the Set key again to continue setting the year. Select the desired year with the up and down keys.
  • month-day / day month sequence Press the Set key again to continue setting the day or month sequence. Select the desired month-day or day-month indication with up and down keys.
  •  month Press the Set key again to continue setting the desired month (1-2-3..to..12). Select the desired year with the up and down keys the desired month indication.
  •  day Press the Set key again to continue setting the desired day (1-2-3..to..31). Select the desired day with the up and down keys.
  •  12/24 hour display Press the Set key again to continue setting the desired hour format (12 or 24 hours). Select the desired hour format with the up and down keys.
  •  hour Press the Set key again to continue setting the desired hour Select the desired hour with the up and down keys.
  •  minutes Press the Set key again to continue setting the desired minutes. Select the desired minutes with the up and down keys.
  • seconds Press the Set key again to continue setting the desired seconds. Select the desired seconds with the up and down keys.

Alarm time for the alarm clock

There are two alarm clocks present in this weather station. These can be turned on or off individually with separate wake-up time. With the alarmkey SSW the alarms can be activated. When an alarm goes off, it can beturned off with the snooze function. The Snooze key is located on top of the device. The alarm will then stop for 5 minutes and the alarm icon and snooze icon flashes, whereafter the alarm will sound again.SSW During snooze, the snooze function can be turned off by alarm key activation. During the alarm, it can be turned off by using any other key. If the alarm is not turned off, it will continue for 3 minutes. The alarm will become progressively louder and then stop.

alarm 1 hour

press 2 x on the Mode key . Alarm time appears Press the Set key for 3 seconds The alarm 1 hour will start to flash. Insert here with the up and down , the desired alarm hour of alarm 1.

alarm 1 minutes
Press the Set key again to continue setting the desired minutes. Select the desired minutes with the up and down keys.
alarm 2 hour
Press the Set key again to continue setting the desired hour Select the desired hour with the up and down keys.

alarm 2 minutes
Press the Set key again to continue setting the desired minutes. Select the desired minutes with the up and down keys.

Height correction setting atmospheric pressure gauge

height
press 3 x on the Mode key . Height setting appears
Press the Set key for 3 seconds
Height setting will start to flash. Insert here with the up and down keys, the desired height.

Temperature alarm setting for outdoor and indoor temperature

  • outdoor temperature alarm low  press 4 x on the Mode key . Height setting appears press the Set key for 3 seconds Outdoor temperature setting low starts to flash. Insert here with the up and down keys, the desired temperature.
  •  outdoor temperature alarm low on or off  Press the Set key again to turn the low-temperature alarm on or off. Select with the up and down keys whether the low temperature alarm is on or off (OFF = off, ON = on).
  •  outdoor temperature alarm high Press the Set key again to adjust the high-temperature setting. Select with the up and down keys the desired alarm temperature.
  •  outdoor temperature alarm high on or off  Press the Set key again to turn the high temperature alarm on or off. Select with the up and down keys whether the high temperature alarm is on or off (OFF = off, ON = on).
  •  indoor temperature alarm low Press the Set key  again to adjust the low temperature setting. Select with the up and down keys the desired alarm temperature.
  •  indoor temperature alarm low on or off Press the Set key  again to turn the low temperature alarm on or off. Select with the up and down keys whether the low temperature alarm is on or off (OFF = off, ON = on).
  •  indoor temperature alarm high.Press the Set key again to adjust the high temperature setting. Select with the up and down keys the desired alarm temperature.
  •  indoor temperature alarm high on or off. Press the Set key again to turn the high-temperature alarm on or off. Select with the up and down keys whether the high temperature alarm is on or off (OFF = off, ON = on).

Rain gauge display extension in mm or inches

extension setting
press 5 x on the Mode key . Precipitation details appear Press the Set key for 3 seconds Precipitation extension starts to flash. Insert here with the up and down keys, the desired precipitation extension in (mm or inches).

Wind speed display extension in km/h or mph

extension setting
press 6 x on the Mode key . Wind speed details appearPress the Set key for 3 seconds Wind speed extension starts to flash. Insert here with the up and down key, the desired wind speed extension in (km/h or mph).

GENERAL OPERATION AND FUNCTIONS

Barometer

The atmospheric pressure value is measured with a barometer. The atmospheric pressure value can be displayed in Ft, M, inHG, and hPa. In the Benelux, the hectoPascal notation is used; although previously air pressure was also expressed as 1 mbar equals 1 hPa. The atmospheric pressure decreases the higher you are above sea level. A rule of thumb is that the atmospheric pressure decreases by 1 hPa per 8 meters. In this weather station menu, the height can be entered so that the air pressure is compensated for and the correct air pressure value is displayed. The height can be adjusted in 10-meter increments between -90 meters and +1990 meters. See 6.4 for this setting.

Trend indication

If the atmospheric pressure increases or decreases by 2 hPa per hour, the trend display will point up or down. If the air pressure changes less than 2 hPa per hour, the straight arrow will be displayed.

Weather forecast by icons

The following icons indicate the respective weather forecast.:

14-day learning mode

The automatic learning mode will activate after start-up or reset. This appears in the “LEARNING” display. This will stop and disappear after 14 days.

Atmospheric pressure trend

The animated graph below shows the atmospheric pressure for the past 12 hours. The weather station must be switched on for at least 12 hours for the correct value. The graph displays differences from +6hPa to -6hPa.This value cannot be modified.

Indoor and outdoor temperature
The indoor and outdoor temperature is displayed in the same manner. See 7.7 for outdoor temperature display. The trend arrow indicates the weather course. If the temperature rises or falls by 1 °C, the trend arrow will point up or down respectively. If the temperature change remains below 1 °C for an hour, the trend arrow remains straight. .

Indoor and outdoor humidity

Indoor and outdoor humidity is displayed in the same manner. See 7.6 for indoor humidity display. The trend arrow indicates the weathercourse. If the humidity rises or falls by 5%, the trend arrow will point up or down respectively. If the humidity does not change by more than straight.

Maximum and minimum temperature and humidity value

In these screens, the maximum and minimum measured temperature and humidity value can be displayed. To do this, press the up key . Max. appe in the display and the maximum measured temperatures and humidity are shown. Press the up key again . Min appears in the display and the minimum measured temperature and humidity is shown. Hold up key for at least 2 seconds to clear min. and max indoor and outdoor temperature and humidity. Note: the maximum wind speed is also cleared. Indoor and outdoor values are cleared simultaneously.

Moon phase display

The moon phase display is linked to the date, year, and time.The stars are displayed between 18.00 and 6.00. The stars disappear between 6.00 and 18.00. The moon goes from no moon to full moon and then back to no moon. is divided into 7 segments.

Wind speed

The current wind speed is displayed. The maximum wind speed is indicated by pressing the up key . See 7.8 for clearing the maximum wind speed. The wind speed is displayed in mph or km/h.

Wind direction

Wind direction display. The pointer indicates previous and current wind direction. The wider triangle indicates the current wind direction.The wind rose consists of 16 wind directions with an intermediate space of 22,5°.Ensure that the wind unit is correctly aligned.

Rain meter

The rain gauge displays the total rainfall by default. With the down key you can choose between today, past hour, yesterday and this b k to total fallen recipitation. Hold the down key to clear the precipitation value.

MAINTENANCE

For easy access to the outdoor units to carry out minor maintenance or to replace the batteries, it is advisable to place the outdoor units in an accessible place, but still as far as possible in the wind or rain.

Rain meter

The rain unit housing can be unclipped from the bottom center, and the inside of the rain gauge can then be cleaned. Use a soft long-bristle brush for this.Clean the collection tray and remove any leaves. Place it back on the rain gauge (note the 2 protruding tabs on the back) and press the housing onto the rain gauge again until a mechanical “click” is heard. See also 4.4 cleaning.

Outdoor temperature and humidity sensor

Blow the openings of the sensor housing clean and use a long-bristle soft brush to clean the rain slats. DO NOT use WATER but only a damp cloth.

Wind vane and windmill scoops

Wipe these parts with a slightly damp cloth. Check that the bearings still rotate smoothly at the same time.

USE INDOOR UNIT WITH BATTERIES

The indoor unit also runs on batteries without an adapter. This will then run out faster than when using an adapter. The display background will not illuminate, but when the buttons are pressed the background lighting will come on for 5 seconds. The light can then no longer be dimmed.

RECEPTION FUNCTION

After installing the batteries and/or plugging in the power adapter connected to the mains, the indoor unit will begin receiving signals from the outdoor units for 5 minutes. The first to be received by the indoor unit will be seen as the correct outdoor unit and will remember the code of the outdoor unit. Check that it is the correct outdoor unit. After the 5 minutes, the indoor unit will stop receiving will only display the value of the outdoor unit received during process. To switch reception on again, press the channel key SSE for at least  2 seconds. To turn off reception, press the channel key S again for 2 seconds.

SPECIFICATIONS

Indoor-unit

Temperature

  • measurement range:  -9.9°C ~ 50°C (‘L0’ or ‘HI’ when out of range)
  • resolution:                  0.1°C
  • accuracy:                    20°C – 24°C = ±1°C 0°C – 20°C en 24°C – 40°C = ±2°C 40°C – 50°C = ±3°C
  • humidity:                   1% ~ 99% RH (if out of range, lower then the display will show 1%, higher the display will show 99%)
  • resolution:                 1% RH 40% – 80% = ±5%, others = ±8%
  • humidity:                  800 ~ 1100hPa
  • resolution:                1hPa
  • measure time:          every hour
  • High correction:      -90meter ~ 1990meter
  • alarm duration:         180 seconds
  • snooze duration:      5 minutes
  • high/low alarm:       outdoor temperature: low default 0°C (-50°C~10°C) high default 35°C (28°C~70°C) indoor temperature: low default 20°C (0°C~23°C) high default 28°C (26°C~50°C)
  • power supply:          3x 1,5V battery, format AAA adapter: Input voltage: 100-240VAC Input frequency: 50/60Hz +/-3HzOutput voltage constant: 5.0V Output current constant: 0.3A Output                                        power constant: 1.5W Efficiency 50% load: 69.86%Input power no load: 0.08W
  • dimensions:            125(H)x190(W)x15(D)mm

Outdoor-unit wind

Temperature

  • measurement range:        -50°C ~ 70°C (‘L0’ or ‘HI’ when out of range)
  • resolution:                        0.1°C
  • accuracy:                          20°C – 24°C = ±1°C 0°C – 20°C en 24°C – 40°C = ±2°C 40°C – 50°C = ±3°C
  • humidity:                         1% ~ 99% RH (if out of range, lower then the display will show 1%, higher the display will show 99%)
  • resolution:                       1% RH
  • accuracy:                         40% – 80% = ±5%, others = ±8%
  • wind speed:                     0km/u ~ 127,5km/u
  • Resolution:                      1km/u
  • power supply:                 4x 1,5V battery, format AA (*)
  • dimensions:                    382(H)x260(W)x105(D)mm
  • Outdoor-unit rain
  • rainfall
  • measurement range:        0-6000mm (‘—’ if outside this range)\
  • accuracy:                        +/-10%
  • resolution:                      0,1mm upon precipitation <1000mm 1mm upon precipitation >1000mm
  • power supply:                 2x 1,5V battery, format AA (*)
  • dimensions:                    120(H)x164(W)x104(D)mm

Radio

  • transmit frequency:      434,025 MHz
  • transmit interval:          wind (55sec.) rain (90sec.)
  • range:                          30m.
  • RF power:                < 0 dBm

Documents / Resources

Alecto WS-3850 Weather Station with Wireless Sensor [pdf] User Manual
WS-3850 Weather Station with Wireless Sensor, WS-3850, Weather Station with Wireless Sensor

References

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