DRTECH WH1170 User manual

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WIRELESS WEATHER STATION
INSTRUCTION MANUAL
This Operation Manual is part of this product and should be kept in a safe place for
future reference. It contains important notes on setup and operation.
Page

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1. Inventory of contents
1) Base station
2) One WH2 remote sensor with mounting bracket
3) Instruction manual
2. Feature
1) Wireless outdoor and indoor humidity (%RH)
2) Wireless outdoor and indoor temperature (°F or °C)
3) Records min. and max. humidity
4) Records min. and max. temperature
5) Barometric pressure 24-hour history graph (inHg or hPa)
6) Weather forecast tendency arrow
7) Forecast icons based on changing barometric pressure
8) DCF radio controlled time and date with manual setting
9) Automatically updates for daylight saving time based on Germany DST system
10) 12 or 24-hour time display
11) Perpetual calendar
12) Time alarm with snooze
13) Can receive one sensor
14) LED backlight
15) Wall hanging or free standing
16) Included transmitter WH2
17) Synchronized instant reception
3. Set up Guide
3.1 Battery install
Note: To avoid operating problems, please take note of battery polarity
before/when inserting any Alkaline Batteries (permanent damaged could be
introduced by inserting the battery in wrong direction). Use good quality
Alkaline Batteries and avoid rechargeable batteries.
1) Insert two AAA batteries into the remote sensor
2) Insert three AA batteries into the weather station.
3) Wait 3 minutes or until the outdoor temperature is displayed in the weather station.
Do not press any keys before outdoor sensor data received.
4) Mount the units, ensuring that the receiver can still pick up the signal from the
transmitter. To measure outdoor temperature, place the transmitter outdoors. It will
transmit the temperature from its location.
Every time the remote sensor is powered up (for example after a change of batteries),
a random security code is transmitted and this code must be synchronized with the
base station to receive weather data. Thus if battery change happened on
transmitter side, then the receiver must be power up again to re-learn the
transmitter.

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After the remote sensor is powered up, the sensor will transmit weather data every 8s
for 6 times. After this learning period is over, then the transmitter will transmit every
48s.
When the base station is powered up, a short beep will sound and all LCD segments
will light up for about 3 seconds before it enters into learning mode to learn the
sensors security code. After the learning mode, the base station will start the DCF
radio controlled time reception and the RCC search icon will turn on. During the
RCC time reception period (maximum 10 minutes), no weather data will be transmitted
to avoid interference. If RCC signal can’t be found within1 minutes, the signal search
will be cancelled and will automatically resume every two hours until the signal is
successfully captured. Regular RF link will be established once RCC reception routine
is finished. Once the radio controlled time is received the DCF icon will be present
above the time
Note: DO NOT PRESS ANY KEY during the first 3 minutes learning period.After both
indoor and outdoor data are displayed you can place your remote sensor outdoors and
set your time (if no RCC reception is possible). If there is no temperature reading in
the indoor station, make sure the units are within range of each other or repeat the
battery installation procedure. If a key is pressed before the weather station receives
the temperature signal, you will need to follow the battery installation procedure again.
Please wait 10seconds before re-insert the battery again to make a proper reset
for both transmitter and receiver.
Note for Radio Controlled Time:
The time and date display is based on the signal provided by the highly accurate
government operated atomic clock. The base station will continue to scan for the radio
controlled time signal each day despite it being manually set. If reception has been
unsuccessful, then the radio controlled time icon will not appear but reception will still
be attempted continually. If reception has been successful, the received time and date
will overwrite the manually set time and date.
Note:
Please participate in the preservation of the environment by properly
disposing of all used-up batteries and accumulators at designated
disposal points. Never dispose of batteries in a fire as this may cause
explosion, risk of fire or leakage of dangerous chemicals and fumes

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3.2 Mounting
1) Base station
With one foldable legs at the back of the unit, the base station can be placed onto any
flat surface or wall mounted at the desired location by the hanging holes also at the
back of the unit. It is important to check that the radio signal can be received before
permanently mounting any of the units
2) Remote sensor
Note: To achieve a true temperature reading, avoid mounting
remote sensor in direct sunlight. We recommend that you mount
the remote sensor on an outside North-facing wall; obstacles
such as walls, concrete, and large metal objects will reduce the
range.
To wall mount, use 3 screws to affix the wall bracket to the
desired wall, plug in the remote sensor to the bracket.
4. LCD overview
4.1 LCD overview
The following illustration shows the full segments of the LCD for description purposes
only and will not appear like this during normal operation.

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1. DST
2. DCF Radio Controlled Time
3. Time
4. Radio Controlled Time icon
5. Alarm on indicator
6. Day of week/ time zone
7. Date
8. Indoor humidity display
9. Indoor temperature and humidity low /
high alarm
10. Indoor temperature display
11. Temperature display unit
12.Indoor temperature and humidity alarm
on indicator
13. Remote sensor transmit signal
indicator
14. MIN/MAX information
15. Dew point temperature display
16. Outdoor humidity display
17. Outdoor temperature and humidity
low/high alarm
18. Temperature display unit
19. Outdoor temperature display
20. General outdoor alarm icon
21. Weather forecast icon
22. Weather tendency indicator
23. Pressure high alarm
24. Absolute or relative air pressure
selection
25. Pressure low alarm
26. Pressure with 24 hour history graph
27. Barometer air pressure
28. Pressure display unit (inHg or hPa)
29. Pressure alarm on indicator
4.2 Weather forecasting
Sunny PartlyCloudy Cloudy Rainy
The four weather icons Sunny, partly Cloudy, Cloudy and Rainy represent the weather
forecasting. There are also two weather tendency indicators to show the air pressure
tendency between the weather icons.
The weather forecasting is based upon the change of air pressure.
4.3 Weather tendency indicator
The weather tendency indicators arrow is located between the weather icons to show
the air pressure tendency and provide a forecast of the weather to be expected by the
decreasing or increasing air pressure. The rightward arrow means that the air
pressure is increasing and the weather is expected to become better. The leftward
arrow means that the air pressure is decreasing and the weather is expected to
become worse.
The change of weather forecast icon is in accord to the relationship between current
relative pressure and the pressure change since last six hours. If the weather is
changing, weather tendency indicator (animated arrows) will be flashing for three
hours indicating a weather change is happening. After that, if weather conditions have
become stable and no new weather change condition met,then the arrows will be
fixed.

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4.4 Examples of changing weather icons:
4.5 Storm warning indicator
The storm threshold can be set to suit the user’s requirement for storm forecasting
from 3-9hPa (default 4hPa). When there is a fall over pressure threshold within 3
hours, the storm forecasting will be activated, the clouds with rain icon and tendency
arrows will flash for 3 hours indicating the storm warning feature has been activated.
Notes to pressure sensitivity setting for weather forecasting:
The pressure threshold can be set to suit the user’s requirement for weather
forecasting from 2-4hPa (default 2hPa). For areas that experience frequent changes in
air pressure requires a higher setting compared to an area where the air pressure is
stagnant. For example if 4hPa is selected, then there must be a fall or rise in air
pressure of at least 4hPa before the weather station will register this as a change in
weather.
5. Program Mode
The base station has five keys for easy operation: SET key, ALARM key, MIN/MAX
key +key and SNOOZE/LIGHT key. And there are four program modes available:
Quick Display Mode, Setting Mode, Alarm Mode and Min/Max Mode.
The program mode can be exited at any time by either pressing the SNOOZE/LIGHT
key, or waiting for the 10-second time-out to take effect.
5.1 Quick Display Mode
- While in Normal Mode, press the SET key to enter the Quick Display Mode as follow:
1. Outdoor Temperature / Dew point (press the MIN/MAX key or +key shifts the
display between outdoor temperature and dew point)
2. Absolute pressure / Relative pressure (press the MIN/MAX key or +key shifts the
display between the absolute pressure and relative pressure)
- press the SET key to accept the change and advance to the next display mode.
Continues to press the SET key to toggle through the display mode until return to the
normal Mode

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5.2 Setting Modes
- Press the SET key for 3 second while in normal mode to enter the normal Setting
mode
-Press the SET key to select the following setting in sequence :
1) Time Zone Setting
The default time zone setting value is 0 base on Germany DCF time (GMT+1)
2) 12/24 hour format
3) Manual time setting (hours/minutes)
4) Calendar setting (year /month /date)
5) Temperature display unit degree Celsius or Fahrenheit
6) Indoor humidity calibration
7) Outdoor humidity calibration
8) Air pressure display units in hPa or inHg
9) Relative pressure setting from 919.0hPa – 1080.0hPa (default 1013.5hPa)
10) Pressure threshold setting (default 2hPa)
11) Storm threshold setting (default 4hPa)
-In the setting modes, press +key or MIN/MAX key change or scrolls the value.
Hold the +key or MIN/MAX key for 3 second will increase/decrease digits in great
steps.
-Press SNOOZE/LIGHT key or key idle 10 second, the setting mode will return to
Normal Mode
Note: Please set the units firstly before change units’ value. During change of units
setting, units’ value will change according to new units but it might cause resolution
loss due to its internal calculation algorithm.
5.2.1 Setting Calibrated Humidity
The display console allows you to calibrate both the indoor and outdoor humidity.
Humidity is a difficult parameter to measure accurately and drifts over time. The
calibration feature allows you to zero out this error. To calibrate humidity, you will
need an accurate source, such as a sling psychrometer or Humidipaks One Step
Calibration kit.
To calibrate indoor humidity, in the Set Mode with indoor humidity flashing, press the +
key or MIN/MAX key to increase or decrease the humidity setting (in increments of 1%)
to match the calibrated or known humidity source. To return the indoor humidity to
the measured value, press and hold the SET key for 3 seconds and the humidity will
return to the uncalibrated value.
To calibrate outdoor humidity, in the Set Mode with outdoor humidity flashing, press
the +key or MIN/MAX key to increase or decrease the humidity setting (in increments
of 1%) to match the calibrated or known humidity source. To return the outdoor
humidity to the measured value, press and hold the SET key for 3 seconds and the
humidity will return to the uncalibrated value.

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Note: The remote (outdoor) thermo-hygrometer will always display the measured
humidity level and not the calibrated humidity level. Only the console will show the
calibrated value.
Note: The dew point calculation is based on the calibrated humidity level.
5.2.2 Setting Calibrated Temperature
Temperature is measured by a resistive thermal device (RTD) and is subject to
electronic variation.
Temperature errors can also occur when a sensor is placed too close to a heat source
(such as a building structure, the ground or trees).
To calibrate the indoor or outdoor temperature, we recommend a mercury or red spirit
(fluid) thermometer. Bi-metal (dia) and other digital thermometers are not a good
source and have their own margin of error. Using a local weather station in your area
is also a poor source due to changes in location, timing (airport weather stations are
only updated once per hour) and possible calibration errors (many official weather
stations are not properly installed and calibrated).
Place the sensor in a shaded, controlled environment next to the fluid thermometer,
and allow the sensor to stabilize for 24 hours. Compare this temperature to the fluid
thermometer and adjust the console to match the fluid thermometer.
To calibrate indoor or outdoor temperature, in the Set Mode with indoor or outdoor
temperature flashing, press the +key or MIN/MAX key to increase or decrease the
temperature setting (in increments of 0.1 degC or 0.18 degF) to match the calibrated
or known temperature source.
Note: The remote (outdoor) thermo-hygrometer will always display the measured
temperature level and not the calibrated temperature level. Only the console will show
the calibrated value.
Note: The dew point calculation is based on the calibrated temperature level.
5.2.3 Setting Barometric Pressure
The display 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).

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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 the 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.
To change the relative pressure is flashing, press the +key or MIN/MAX key to
increase or decrease the relative pressure setting to match the official reporting
station.
5.3 Alarm Modes
- While in Normal Mode press the ALARM key to enter the High Alarm Mode
- Press the ALARM key again to enter LowAlarm mode
Remark: after the initial pressing of ALARM key, the display will be refreshed to
show current high, low alarm value. Normal alarm value will be displayed only for
those already activated, all other not activated values will be displayed with
“---“or”--“instead.
- Press the ALARM key again to return the Normal Mode
- In the High Alarm Mode press the SET key to select the following alarm modes:
1. Time alarm (hour/minute)
2. Indoor humidity high alarm
3. Indoor temperature high alarm
4. Outdoor humidity high alarm
5. Outdoor temperature and dew point high alarm
6. Pressure high alarm
- In the Low Alarm Mode press the SET key to select the following alarm modes:
1. Time alarm (hour/minute)
2. Indoor humidity low alarm
3. Indoor temperature low alarm
4. Outdoor humidity low alarm
5. Outdoor temperature and dew point low alarm
6. Pressure low alarm
- In the alarm modes, Press +key or MIN/MAX key change or scrolls the alarm
value. Hold the +key or MIN/MAX key for 3 second to change the number in great
step. Press the ALARM key to choose the alarm on or off (if alarm is enabled, the
speaker icon on the LCD will be turned on indicating the alarm function has been
enabled). Press the SET key to confirm the setting and continue pressing the SET
key to toggle through each alarm mode until it returns to the normal display mode.
- Press SNOOZE/LIGHT key or key idle 10 second at any time, the alarm mode will
return to Normal Mode

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Canceling the Temperature Alarm While Sounding
a. When a set weather alarm condition has been activated, that particular alarm will
sound and flash for 120 second. Press any key to mute the alarm. When weather
alarm condition was activated again within 10 minutes, alarm will not sound but will
continue to flash until weather conditions have become more steady. This feature is
useful to avoid repeated triggering for the same alarm value.
b. The alarm will reactivate automatically once the value has fallen below the set value,
or if a new value is entered.
The outdoor weather alarm
When a set outdoor weather alarm has been triggered, it will flash on the LCD display
and the general outdoor alarm icon and high/low alarm icon will flash accordingly. For
example in outdoor temperature display mode, when dew point high alarm is triggered,
DEW POINT icon will flash along with general outdoor alarm icon and high alarm icon
flashing, telling that the current alarm source is from dew point.
5.4 Min/Max Mode
-While in Normal Mode, press the MIN/MAX key to enter the maximum mode, MAX
logo and the general Max record will be displayed.
-Press MIN/MAX key again to enter the minimum mode, MIN icon and minimum
record will be displayed
-Press MIN/MAX key again to return the Normal Mode
-In the maximum reading Mode, press the +key to display the following maximum
values together with the time and date time stamp at which these values were
recorded, if press SET key for 2 seconds in the following individual maximum
value will be reset to current reading:
1. Indoor humidity maximum
2. Indoor temperature maximum
3. Outdoor humidity maximum
4. Outdoor temperature maximum
5. Outdoor dewpoint maximum
6. Pressure maximum

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-In the minimum reading Mode, press the +key to display the following minimum
values together with the time and date at which these values were recorded, if
press SET key for 2 seconds in the following individual minimum value will be reset
to current reading:
1. Indoor humidity minimum
2. Indoor temperature minimum
3. Outdoor humidity minimum
4. Outdoor temperature minimum
5. Outdoor dewpoint minimum
6. Pressure minimum
- Press the SNOOZE/LIGHT key or key idle 10 second, the Min/Max mode will return
to Normal Mode
6. Problems and interference with operation
Problem & cause Remedy
Distance between transmitters
and receiver too long Reduce distance between transmitters and receiver to receive signal
High shielding materials between
the units (thick walls, steel,
concrete, isolating aluminum foil
and etc.)
Find a different location for sensors and/or
receiver. See also item ‘transmission range’
below
Interference from other sources
(e.g. wireless radio, headset,
speaker, etc. operating on the
same frequency)
Find a different location for the sensors and/or
base station. Neighbors using electrical devices
operation on the same signal frequency can also
cause interference with reception
No reception after adding
extension cables Find a new location for the sensors and/or base station.
Poor contrast LCD or no
reception or low batteries in
sensors or receiver
Change batteries
Temperature, humidity, or air
pressure is incorrect.
Check/replace batteries. If multiple remote
sensors are in use, check location with
corresponding “boxed numbers”. Or move away
from sources of heat/cold.Adjust relative air
pressure to a value from a reliable source (TV
radio, etc.).

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