Reinhardt Messelectronic MWS 3 User manual

Manual
MWS 3 & 485-Sensors
with Microprocessor
without datalogger
REINHARDT System- und
Messelectronic GmbH
Bergstr. 33, D-86911 Dießen-Obermühlhausen
Tel. 0049 - (0) 8196/934100 Fax 0049 - (0)8196/7005 or 1414
E-Mail: [email protected]
http://www.reinhardt-wetterstationen.de

REINHARDT System- und Messelectronic GmbH
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Table of contents
1 Caution .......................................................................................................................................................5
1.1 Intended Use..................................................................................................................................5
1.2 Safety Regulations .........................................................................................................................5
1.3 Mounting.........................................................................................................................................5
2 Setting Up the Weather Station................................................................................................................6
2.1 Installation of Hardware..................................................................................................................6
2.2 Software Installation.......................................................................................................................6
2.3 Starting the Software......................................................................................................................7
3 Technical details........................................................................................................................................7
3.1 Maintenance...................................................................................................................................7
3.2 The sensors....................................................................................................................................8
3.2.1 The Temperature sensor (MWS 3, DFT 485, FTS 485 and DTS 485) ..................................8
3.2.2 The Humidity sensor (MWS 3, DFT 485 and FTS 485) .........................................................8
3.2.3 The Pressure sensor (MWS 3, DFT 485 und DTS 485) ........................................................8
3.2.4 The Wind Speed sensor.........................................................................................................9
3.2.5 The Wind Direction sensor.....................................................................................................9
3.2.6 The Clouds sensor WKS 485.................................................................................................9
3.2.7 The light intensity sensor HKS 485 ........................................................................................10
3.2.8 The Global radiation sensor GSS 485 ...................................................................................10
3.2.9 The Ultraviolet-radiation sensor UVS 485..............................................................................10
3.2.10 The UVI-radiation sensor UVIS 485.....................................................................................10
3.2.11 Der RainDetectionRadar sensor RDR-485 ..........................................................................10
3.3 Sensor Accuracy ............................................................................................................................11
3.3.1 Measuring Ranges .................................................................................................................11
3.3.2 Sensitivity setting of the RDR-485 .........................................................................................11
3.4 Power Supply .................................................................................................................................12
3.4.1 Current consumption..............................................................................................................12
3.4.2 Power consumption................................................................................................................12
3.5 Data Format ...................................................................................................................................13
3.5.1 RS232 / RS422 port ...............................................................................................................13
3.5.2 RS485 port .............................................................................................................................14
3.6 System requirements .....................................................................................................................14
3.6.1 System requirements (32bit-Versions)...................................................................................14

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4 Connections and Pin assignments..........................................................................................................15
4.1 Cables ............................................................................................................................................15
4.1.1 Data Cable - Allocation of the Connection Cable for MWS 3 ................................................15
4.1.2 Allocation of the Connection Cable for Sensors with RS422-port..........................................16
5 Excerpts from the Directions of DWD for Automatic Weather Stations...............................................17
6 Trouble Shooting.......................................................................................................................................18
6.1 Fault Protocol File (16 bit versions)................................................................................................18
6.2 Protocol-files (32 bit versions)........................................................................................................18
6.2.1 Log-file in case of error (ErrLog.txt) .......................................................................................18
6.2.2 Logfile when starting up (log.dat) ...........................................................................................18
7 Options.......................................................................................................................................................19
7.1 Available displays...........................................................................................................................19
7.2.1 Meteograph ............................................................................................................................19
7.2.2 DKA1......................................................................................................................................19
7.2.3 DMMK ....................................................................................................................................19
8 Technical Appendix...................................................................................................................................20
8.1 Controlling the Microcontroller........................................................................................................20
8.1.1 Input parameters of MWS 3 / 485-Sensors -Microcontroller ..................................................20
8.2.2 Querying the Microprocessor .................................................................................................23
8.2.3 Order of the MWS 3 sensors..................................................................................................24
9 Exchange Connectors...............................................................................................................................25

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MWS 3 / WGWR 485
WGS 485 WRS 485
DFT 485
FTS 485
DTS 485
WKS 485
HKS 485
GSS 485
UVS 485
UVIS 485
RDR 485

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1 Caution
1.1 Intended Use
The REINHARDT-Weather station MWS 3 & the 485-Sensors (in the rest of the manual always
named as MWS3) are designed for stationary operation for short time measuremnts to collect
climatic parameters outside. The unit must not be operated on vehicles or machines due to the
vibrations! For long time measurements year-round REINHARDT offers optionally heated wea-
ther stations with data logger, for example: MWS 5MV, MWS 9-5 and sensors with data logger,
like WDS 1MV, DFT 1MV, ...
The operating temperature range is from -40°C ... +60°C.
Any use other than described above may cause damage of the product or lead to other dangers.
Do not mount the weather station in reach of children and pets.
Carefully read the complete operating manual. It contains important information about the in-
stallation and operation.
1.2 Safety Regulations
The instruments are manufactured according to modern technical standards and can be operated
without danger when used as directed.
Damage caused by non-observance of this operating manual can lead to forfeiture of warranty.
We shall not assume any liability for subsequent damage.
We shall not assume any liability for damage of items or persons caused by improper handling
or non-observance of the safety instructions! In such cases any guarantee claims shall become
null and void.
Dear customer, the following safety and hazard notices not only serve the protection of your health
but also the protection of the appliance. Please read the following points carefully.
The supply voltage is converted by isolated transformers into voltages of maximum 24VDC (the
MWS3 can be operated at voltages uo to 30VDC).
Please do only use the supplied power supply units.
The weather station includes pointed and sharp-edged parts (i.e. windvane and edges of the
sensor's housing), which may cause injuries when handled without care.
Do not leave the packaging material lying around. These parts are dangerous toys in the hands
of children.
Handle the product with care. Blows or impact, or dropping it even from a small heigth will da-
mage it.
1.3 Mounting
For mounting the weather station a sensor holder (a stable plate with a 18mm hole) is needed.
This holder may be a folded sheet mounted at a pipe or a cantilever of a mast.
The threaded fitting of the MWS 3 is sticked into the 18mm hole, the MWS 3 then orientated to
north and then fixed well with the attached nut.
CAUTION: Never hold the sensor at the top when tightening the sensor but only at the
bottom. Otherways the internal board may be bent and destroyed!

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Finally the cable has to be connected and the power supply plugged into the mains.
The MWS 3 now is ready for operation and sends a data string each second (RS232 /RS422 only).
The MWS 3 and the 485 Sensors contain sensors for measuring the most important climatic pa-
rameters like temperature, humidity, air pressure, wind speed and wind direction.
All parameters can be displayed with the 32bit-software (as an option) as graphical chart, as
digital display or in a multiple display.
Furthermore statistical values, a process control unit and a history is available.
2 Setting Up the Weather Station
2.1 Installation of Hardware
Mount the weather station as described above. Take care that the MWS 3 is mounted as perpen-
dicularly as possible, otherwise the windvane will not work properly and will preferably rotate
in one direction.
The weather station must be set up at a place which is exposed to wind, because otherwise wind
direction and wind speed cannot be measured correctly. (Please see "Directions of DWD").
If you haven't ordered a ready made cable, you need to build a cable with the attached connectors
by yourself. For power supply you need a voltage between 6 an 30VDC and at least 20mA.
Connect the cable as follows:
Connect the 9pole connector to a free serial interface of your PC (COM1, COM2, ...)
Plug in the power supply into a power outlet 230V / 50Hz or connect a solar panel with accumulator.
Note on Security
Please note that the nominal value of the PSU must be between 6 V and 30 V DC voltage. Please
note also that all the power supplies we provide are only made for use in dry rooms.
The MWS 3 doesn't have a reverse pole protection so please pay attention to proper connection of
the power supply!
Never loosen the 6 allen srews holding the complete housing. Please note that in case of non-
compliance the MWS 3 may be damaged!
After installing the hardware, the software is installed and started.
2.2 Software Installation
Insert the WeatherCD into your CD-drive. Please not that the 32bit-software is an option with
some single sensors!
You need an HTML-capable browser (Firefox, Internet-Explorer or else).
If Autostart is activated, the CD starts on its own, if not, you execute STARTER.EXE in the CD root
directory. (If you want to install the software packages directly, you will find the paths for the
single installations in the install.html file.)
Now you follow the instructions of the WeatherCD.

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2.3 Starting the Software
Start the software by double-clicking the program icon.
First choose the directory for storing the weather data and as an option, a second path for the
weather data. Insert your desired storage interval.
Then select Without datalogger under Configure data storage.
A new dialog opens.
Select the interface (COM1, COM2, ...).
If the software doesn't start up, a damaged weather data file on the harddisk or not enough free
memory may be the reason. This may lead to termination of the software.
For more detailed information refer to the latest software manual here.
If you want to use own software you may read the data string directly from the COM port.
The COM port can be disabled so that you can request a data string when ever you want.
When using RS485, then this is the basically operation.
More details you'll find under chapter 8 (technical appendix)
3 Technical details
For the MWS 3 hasn't got a data logger the software needs to run permanently to get gapless
weather data!
3.1 Maintenance
Because of its elaborated sensors, the MWS 3 needs no maintenance.
Our warranty ends if there is any intervention into hardware or software from your side.
MWS 3 weather station has been developed for stationary use for short time measurements under
normal climatic conditions (temperate zone). Use under extreme conditions such as e.g. on board of
a ship, mobile use on a measuring vehicle etc. has not been tested. It is therefore not recommended
to set up the weather station where it is exposed to salt or salt water ( e.g. right at the coast etc.).
It can be used on a measuring car under certain conditions although the measured values of the
wind sensors cannot be reproduced. Operation on a vehicle off road is not recommended due to
strong vibrations and strong shocks!

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3.2 The sensors
3.2.1 The Temperature sensor (MWS 3, DFT 485, FTS 485 and DTS 485)
Temperature measurement is based on a fully calibrated sensor element with I²C interface. The
measured value is processed by the microcontroller and then output at the serial port with the
identifier TE. The temperature sensor is placed inside the MWS 3 housing.
Range: from -40 °C to + 60 °C, measuring accuracy ± 1.0 °C, (display also possible in Kelvin or
°Fahrenheit)
CAUTION: Compared to temperature measurements in big shielded cabins the measured values
can be higher when the sun is shining. If the temperature measurements must correlate with
the measurements in big shielded cabins you should measure temperature in the shaodow or
measure with an additional temperature sensor placed in the shadow or in a big shielded cabin!
Unit [°C]
3.2.2 The Humidity sensor (MWS 3, DFT 485 and FTS 485)
is based on a fully calibrated sensor element with I²C interface. The measured value is processed
by the microcontroller and then output at the serial port with the identifier FE. The humidity
sensor is placed inside the MWS 3 housing.
The humidity sensor can be used in a temperature range between -40 °C to + 60 °C. It is linearized
to an accuracy of 2.5 % between 10% and 90% relative humidity at 25°C.
Range: from 10 to 100 %, measuring accuracy ±2.5 % (between 10% and 90% relative humidity),
display also as dewpoint measurement in °C or °F
Unit [%]
NOTE
This sensor is very responsive to static charge and air pollution (dust, aggressive gases, but also salt).
Please note that under unfavourable conditions (i.e. microbic stress caused by moulds, bacteria)
this sensor ages faster than under normal conditions.
3.2.3 The Pressure sensor (MWS 3, DFT 485 und DTS 485)
is a 16-bit pressure module with integrated temperature sensor for compensation. The pressure
sensor also has got an I²C interface. Its value has got the identifier DR on the serial port.
The temperature sensor of the pressure sensor has got the identifier TD on the serial port.
The sensor TD is essential for compensating the pressure sensor and must not be disabled!
The pressure sensor can be used in the temperature range of -40 °C to + 60 °C.
Measuring range: from 300 hPa to 1100 hPa with ± 1.0 hPa accuracy typical;
display can be reduced to 0 m above sea level (input of the local altitude in [m], display also in
mm mercury column or Inch mercury column).
The formula for reducing preesure to sea level used in this sensor is:
Barometer = absolute pressure [hPa] + ((altitude [m] + 199,1) / 10,079) - ((altitude [m]-2000) / 450)²
This is a simple formula for reducing pressure. There are other formulas for reducing pressure to
sea level. You'll find in the web. You may add one of these formulas into the Reinhardt weather
software to reduce pressure with a more complex formula.
Unit [hPa]
This sensor can be transported by air cargo!

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3.2.4 The Wind Speed sensor
is made up of an anemometer with optical scanning. Wind speed is measured without touch using
an optical detector. A peak detector finds every wind peak and hands them on the measuring
software. An average value is determined within the respective memory intervals and is reset
each time the software stores onto the harddisk. The sensor identifiers are WG for wind speed,
WS for wind peak and WD for wind average.
Range: in km/h from 0 to 200 km/h with ± 2.5 km/h measuring accuracy, (display also in m/s,
miles/h, Knot or Beaufort), starting speed < 0.8 m/s.
As we have a very comfortable, 3-fold way of measuring wind speed with current wind speed
(WG), average wind speed (WD) and wind peaks (WS), you can conform your wind measurement
to your very needs.
Please note that dependent on the current winds, the 3 different methods of measuring wind
speed can result in very differing graphs: When measuring WG, only a current value is written
in the selected measuring interval, when measuring WD and WS, there is continuous evaluation
and the whole measuring period is monitored.
Unit [km/h]
3.2.5 The Wind Direction sensor
There is a weather vane with a precision magnetical encoder and a rotation angle of 360 ° for
measuring wind direction. Wind direction is given in °, with 90° being East, 180° being South,
270° being West and 0 ° being North.
Range: in 360 °, measuring accuracy 5 °, starting speed, < 0.8 m/s, hysteresis < 5°.
Output is performed as WR (winddirection).
Unit [°]
3.2.6 The Clouds sensor WKS 485
The Cloudssensor detects if there are clouds or not using a thermopile.
If the sensor detects clouds in it's field of view, the sensor with the identifier WK has got the
value 1, if the sensor detects no clouds, this value is 0.
An additional internal signal is used to calculate the cloud's base using a special formula.
This formula calculates the cloud's base as follows: T(h) = T0- h * y,
where T(h) is the cloud's temperature, T0is the ambient temperature of the sensor, h is the alti-
tude and y is the temperature gradient in [K/m].
The temperature gradient y is the cooling down in [K) per metre altitude. The value of this gradi-
ent is depending on the humidity of the air (dry adiabatic lapse rate or wet-adiabatic lapse rate).
The wet-adiabatic lapse rate is app. 5*10-3 Km-1, the dry adiabatic lapse rate is app. 10-2 Km-1.
For the exact weather conditions in the athmospere are mostly not known, meteorologists calculate
with an average value of 6.5*10-3 Km-1, this means a cooling down of app. 6.5°C per kilometer.
This value also is used calculating the cloud's base within the WKS 485.
Finally the sensor with the identifier WU contains the cloud's base in [m].
The calculation of the cloud base by this formula can be faulty due to influences caused by different
weather situations and must not be used for security-related measurements, (i.e. air traffic, ...)!

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3.2.7 The light intensity sensor HKS 485
The light intensity sensor contains a photodiode array, an integrating analog-to-digital converter
(ADC), signal processing circuitry, lux calculation logic, and an I²C serial interface on a single
CMOS integrated circuit to provide lux data with a 16-bit output.
It measures the light intensity in lux within the visible spectrum (Human Eye Response).
The mesuring range is 0..220000 lux, the sensor identifier is LX.
3.2.8 The Global radiation sensor GSS 485
This is a pyranometer which absorbs radiation between 305 and 2800 nm. The temperature of
a black and a reflecting element is subtracted and linearised by the software. The measuring
sensor is a thermocouple.
The values are edited in W/m2.
The measured value reaches 90 % of its final value after about 60 seconds.
Unit [W/m²]
Range: from 0 to 1300 W/m2with ±40 W/m2accuracy.
3.2.9 The Ultraviolet-radiation sensor UVS 485
measures ultraviolet radiation in UV-A spectrum in mW/m². The spectral range is 320nm..395nm
with maximum sensitivity at 330nm.
3.2.10 The UVI-radiation sensor UVIS 485
directly measures the UV-Index (erytemal action spectrum) with the maximum at 297nm. The
measuring range is between 0 and 12 UVI.
3.2.11 Der RainDetectionRadar sensor RDR-485
is a maintenance free detector using a 24GHz Doppler-Radar for detecting rain and hail.
To avoid errors in detecting the sensor must have free sight at the top.
Caution: very light drizzle and snow cannot be detected reliable. This is caused by too small
content of water, droplet size and drop speed reflecting the radar signal not sufficient enough.
The RDR-485 detects direct and passing drops. The clear distinction between raindrops and other
objects causing a similar radar reflection is difficult. So the RDR-485 must be mounted distantly
enough to moving objects like trees, streets, persons i.e.
The sensor also must not be mounted near neon tubes, HID-lamps and other systems using 24GHz
frequency.
To avoid detection in error caused by a single event (spurious pulse, insects, birds or contaminants
carried by the air) the first pulse is blocked for app. 1.5 seconds. After this time the detection is
enabled for app. 1 minute and sets the sensor RA to high when another detection happens within
this time.
After being set to high the sensor RA stays high for app. 2 minutes. When a new detection is
performed within these 2 minutes this countdown is restarted (retriggered).

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3.3 Sensor Accuracy
Temperature: ± 0.5 °C (at +25°C)
± 1.0 °C (between -10°C and +60°C)
Humidity: ± 2.5 % (between 10% and 90% relative humidity at 25°C)
Pressure: ± 1.0 hPa (typical between 300..1100 hPa at 0°C..50°C)
± 2.5 hPa (max. between 700 hPa and 1100 hPa at 0°C..50°C)
± 3.0 hPa (max. between 300 hPa and 700 hPa at 0°C..50°C)
± 4.0 hPa (max. between 300 hPa and 1100 hPa at -20°C..0°C)
Temperature pressure sensor:
± 2.0 °C (between -10°C and +60°C)
Wind direction: ± 5° (at -10°C..50°C), hysteresis < 5°
Start speed: < 0.8m/s (at 0°C..50°C)
Wind speed: ± 2.5 km/h (at 0°C..50°C)
Start speed: < 0.8 m/s (at 0°C..50°C)
Light intensity: maximum drift of -0.25% / °C from -15°C..0°C
maximum drift of -0.20% / °C from 0°C..70°C
Global radiation: +/- 40W/m²
UV-A: +/-10%
UVI: +/-1/2 UVI
3.3.1 Measuring Ranges
Temperature: from -40 ° to + 60 °, resolution 0.01°C (16bit)
Relative humidity:f from 10 to 100 % resolution 0.01 % (16 bit)
Dewpoint: from -40 ° to + 60 °, resolution 0.01°C
Absolute pressure: from 300 hPa to 1100hPa in 0.03 hPa resolution (16 bit)
Wind direction: 0 to 360 °, resolution 0.3 ° (10 bit)
Wind speed: in km/h from 0 to 200 km/h with 0.05 km/h resolution
Light intensity: in lux from 0 to 220000 lux with resolution of 4 lux
UV-A: 0 to 50000 mW/m²
Global radiation: 0 to 1500 W/m²
Measures MWS 3:
Size: Outer diameter 110 mm at a height of 180 mm
Weight: app. 350 g
3.3.2 Sensitivity setting of the RDR-485
The RDR-485 sensor has got a second sensor RS in it's output string which ells the detection
intensity. This value has got the unit [mV].
The sensitivity can be set in 2 levels. The command !X0 sets the sensor from sensitive to insensitive
(detection is triggered at app. 120mV). !X1 = sets the sensor to sensitive(detection is triggered at
app. 70mV).
When using the RDR-485 in proper environment (not near interference sources) the setting should
be left at sensitive (!X1) to ensure that the sensor detects even small rain drops.
The setting is set to sensitive by default.

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3.4 Power Supply
6-30 VDC, 8-30V (RDR-485)
3.4.1 Current consumption
Typical current consumption of MWS 3 with RS-232 at different voltages:
Input voltage: 6V 12V 18V 24V
MWS 3: 19mA 9.7mA 6.8mA 5.2mA
DFT 485: 2.4mA 1.3mA 0.9mA 0.7mA
WGS 485: 7.0mA 3.9mA 3.2mA 2.8mA
WKS 485: 3.2mA 1.6mA 1.1mA 0.9mA
GSS 485 : 5.7mA 2.8mA 1.9mA 1.5mA
HKS 485: 4.5mA 2.3mA 1.6mA 1.2mA
UVIS 485: 5.6mA 2.9mA 2.0mA 1.6mA
3.4.2 Power consumption
The typical power consumption with RS-232 at 18VDC is:
MWS 3 : 6.8mA, power consumption: 122mW
DFT 485 : 800µA, power consumption: 16mW
WGS 485 : 3.2mA, power consumption: 58mW
WKS 485 : 1.1mA, power consumption: 20mW
GSS 485 ; 1.9mA, Leistungaufnahme: 34mW
HKS 485 ; 1.6mA, power consumption: 29mW
UVIS 485 ; 2.0mA, Leistungaufnahme: 36mW

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3.5 Data Format
3.5.1 RS232 / RS422 port
The data format of the transmitted data looks like this:
Example of a datastring :
TD22.13, TE22.09, DR952.25, WG2.00, WR78.91, FE35.58, WS4.11, WD3.29
Every second MWS 3 transmits a data record which includes the measured values separated by
comma, the single measured values with sensor identification come in the following order:
Temperature of pressure sensor (TD), temperature (TE), barometer (DR), wind speed (WG), wind
direction (WR), humidity (FE), wind peak (WS) and average wind (WD).
The datastring ends with <CR><LF>.
The data format of DFT 485 looks like this.
Example of a datastring :
TD22.13, TE22.09, DR952.25, FE35.58
Every secondthe DFT 485 transmits a data record, which includes the measured values separated
by comma, the single measured values with sensor identification come in the following order:
Temperature of pressure sensor (TD), temperature (TE), barometer (DR) and humidity (FE).
The datastring ends with <CR><LF>.
The data format of WGS 485 looks like this.
Example of a datastring :
WG9.13, WS18.23, WD12.23,
Every second the WGS 485 transmits a data record, which includes the measured values separa-
ted by comma, the single measured values with sensor identification come in the following order:
Current wind speed (WG), windpeak since the last reset (WS), average wind speed since the last
reset (WD).
The datastring ends with <CR><LF>.
The data format of WKS 485 looks like this.
Example of a datastring:
WU1264.00, WK1.00,
Every second the WKS 485 transmits a data record, which includes the measured values separa-
ted by comma, the single measured values with sensor identification come in the following order:
Calculated cloud's base in [m] (WU), cloudy = 1.00, no clouds = 0.00 (WK),
If the calculated cloud's base exeeds 4000m, the sensor switches to "no clouds".
This threshold may be changed by using a terminal software.
For questions how to perform, please contact us.
The datastring ends with <CR><LF>.
The data format of HKS 485 looks like this.
Example of a datastring:
LX23824.00
Every second the WKS 485 transmits a data record, which includes the light intensity in [lux].
The datastring ends with <CR><LF>.

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The order of the sensors can be changed by reconfiguring the output positions (!Kxx) with internal
sensor numbers. (see technical appendix - chapter 8)
By default, the data are transmitted with 9600BAUD, 8bit, no parity and a stopbit. (For evaluati-
on with your own software, you can set several output modi - see technical appendix - chapter 8)
On harddisk, a data file is created every month with a format which is similar to that of the
transmitted data. The data files receive the extension .MWS
Example : The file of January 2011 is named 01_11.MWS when using 16-bit versions of the soft-
ware and 01_2011.MWS with 32-bit software.
In case of missing data (caused by power fail, i.e.) the software writes data with measuring values
of -99999 to ensure integrity of the time axis. The software construes these values (-99999 and
-99997) as missing data and creates measurement gaps in the graphical displays.
CAUTION!
In RS422 mode the EEPROM is write protected due to savety reasons to avoid acciden-
tally setting the sensor to RS232 mode what would lead to malfunction of the sensor
and the need to open it!
The write protection can be removed in the SECURE mode of the sensor.
(See 8.1.1 - Input parameters of MWS 3 / 485-Sensors -Microcontroller)
3.5.2 RS485 port
The format of the data is the same as described above with RS 232 / RS422.
But note that with RS485 the sensor always is tristate and only sends any data when data are
requested with the sensor's address.
If the sensor has got the address "10", the command for requesting the current data string is:
?10U, followed by Carriage Return and Line Feed (Press the ENTER key)
Important!!
The standard Reinhard software is not able to read sensor's data with RS485 port.
You'll need an own software application to perform!
CAUTION!
In RS485 mode the EEPROM is also write protected due to savety reasons to avoid
accidentally setting the sensor to RS232 mode what would lead to malfunction of the
sensor and the need to open it!
The write protection can be removed in the SECURE mode of the sensor.
(See 8.1.1 - Input parameters of MWS 3 / 485-Sensors -Microcontroller)
3.6 System requirements
3.6.1 System requirements (32bit-Versions)
At least a computer mit Pentium1 / 200 processor and 32MB RAM.
Runs with WIN98 SE, WIN ME, WIN 2k, WIN XP, Vista and WINDOWS 7.
Using the F1-key or the "?" in the menu bar, you can call the Online-Help at any time.

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4 Connections and Pin assignments
4.1 Cables
4.1.1 Data Cable - Allocation of the Connection Cable for MWS 3
7 pole connector (MWS 3 connection) 9-pole interface connector
Pin 1 (GND) < > Pin 5 (GND)
Pin 2 (GND - used for MWS 9-5)
Pin 3 (RXD-MWS 3) < > Pin 3 (TXD-PC)
Pin 4 (TXD-MWS 3) < > Pin 2 (RXD-PC)
Pin 5 (VCC 18VDC)
Pin 6 (R- with RS422 /485)
Pin 7 (T- with RS422 /485)
Connect Pin 4 and 6
Connect Pin 7 and 8
The data cable can be lengthened to up to 50 m. under optimum conditions and with suited cable
(not in industrial environment!!)
In case you lengthen the data cable, please take care that the connections in the connector at the
computer must be wired.
(Connect Pin 4 to Pin6 and Pin7 to Pin8).

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4.1.2 Allocation of the Connection Cable for Sensors with RS422-port
7 pole connector
(MWS 3-power supply and data-connection)
Pin 1 (GND) < > PSU-GND (grey)
Pin 2 (GND - used for MWS 9-5)
Pin 3 (R+ of MWS 3) < > wire (yellow)
Pin 4 (T+ of MWS 3) < > wire (white)
Pin 5 (VCC 18VDC) < > PSU-VCC (pink)
Pin 6 (R- of MWS 3) < > wire (green)
Pin 7 (T- of MWS 3) < > wire (brown)

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5 Excerpts from the Directions of DWD for Automatic Weather Stations
2.2 Regulations for Installation
2.2.1 Demands on Location
When you choose a place for the weather station, there must be no impediments, its horizon must
be free. Soil and plants must be representative for its surroundings.
For measuring wind it is compulsory that there are no obstacles. Measuring the duration of sun-
shine especially is based on a free horizon.
When transmitting stations such as directional radio or installations for air traffic control are
near, there must be additional shielding.
...
All preventive measures will prove useless if radio medium frequency transmitters are around.
2.2.2 Measuring field
The measuring field ought to be 10 x 10m, but at least 6 x 6m...
3. Sensors
3.1Measuring air temperature 200cm
By standard, air temperatur is measured 2m above ground...
In order to keep radiation errors as low as possible, air temperature ought to be measured in a
weather hut...
3.4Measuring relative air humidity 200cm
By standard, relative air humidity is measured 2m above ground...
3.5Measuring precipitation 100cm
...
The collecting area is 200cm2. The Hornersche Wippe (see-saw) tilts when it is filled with 2cm2,
i.e. 0.1 mm precipitation.
3.7Measuring windspeed
A cup anemometer is used for measuring wind speed. Its rotational speed is proportional to the
horizontal wind speed.
3.8Measuring wind direction
A wind vane with a perpendicular rotary shaft is used for measuring wind direction. Its orientation
in the wind results from the pressure difference on both sides of the vane.
By standard wind direction and wind speed is measured 10m above ground

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6 Trouble Shooting
If the weather station is placed and mounted as described, there should be no problems in recor-
ding data.
When having problems with data transmission, you may decrease the Baud-rate or shorten the
cable. You should use low capacitive cable when using cable length over 15m (RS232).
Using the weatherstation in industrial environment can cause big problems in data transmission,
when disturbance scatters into the cable.
In this case you should use shielded cable or use RS422 Interface.
(Further hints on the weather CD under FAQs.)
6.1 Fault Protocol File (16 bit versions)
Important in case of fault
Whenever you restart the software, all versions of the weather software later than V1.06 create
a protocol file of the data transmissions between PC and weather station. With DOS-versions this
file is called DIAGNOSE.LOG, with WINDOWS-versions DIAG_WS.LOG.
This file can help you, so do save it in any case, as it is overwritten whenever you restart the
software.
Please see the files .DOC or .DOK too. You will find important new information on the weather
software which is not yet in this manual.
6.2 Protocol-files (32 bit versions)
6.2.1 Log-file in case of error (ErrLog.txt)
Softwareversions for sensors without logger same or newer than V2.26 writea log-file (ErrLog.txt)
in case of errors (dataerrors or tranmission problems), in which the timepoint and kind of the error
is stored. Older versions displayed an error-message like !p or data error, which was displayed
permanently until the user clicked it away. This caused the problem that no further data were
written for the time the message was visible although the error did not exist any longer.
In version same or newer V2.26 also an error message appears, but this message is deleted
automatically when the error is removed. In this case an entry is written into the log-file.
6.2.2 Logfile when starting up (log.dat)
When the software for weatherstations and sensors with logger is started, the communications
between the computer and the weatherstation is stored in a log-file (log.dat). With this file you
may get important hints in case of problems.
Caution! This log-file is overwritten each time, when the software is restarted. To keep this file,
store it in another place or rename it.
software.

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7 Options
More additional modules you can find here:
http://www.reinhardt-testsystem.de/english/climate_sensors/additional_modules.php
7.1 Available displays
7.2.1 Meteograph
Precision analog display with high grade stepping motors.
For indoor use only.
7.2.2 DKA1
LED mini display for alternating of up to 9 values. 13 mm digit size.
7.2.3 DMMK
Small digital meteo display for displaying 10 parameters simultaneously with digit size 13 mm.
Available for wall mounting or placing on a table.
For indoor use only.

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8 Technical Appendix
8.1 Controlling the Microcontroller
8.1.1 Input parameters of MWS 3 / 485-Sensors -Microcontroller
Reset
'!' '*' <#13>
Changing the BAUD-Rate:
'!' 'B' <X> <#13> ; 0 < X < 8 :
BAUD-Rate for X = 0 : 1200
1 : 1200
2 : 1200
3 : 2400
4 : 4800
5 : 9600 (Default)
6 : 19200
7 : 38400
8 : 4800
Input-flags for control, !Fx, 0 <= x <= 255
Bit 7 - not available
Bit 6 - Output of device address (DA) with <CR><LF> in front of every data record
Bit 5 - on: Reset of GE input with !R, off: Reset of GE input with !P
Bit 4 - not available
Bit 3 - not available
Bit 2 - not available
Bit 1 - not available
Bit 0 - not available
Changing from measured value output and adjustment mode (output of frequency):
'!' 'W' <#13>
Fading in/out single sensors (All available sensors are listed on a following page.)
'!' 'KX,A0' <#13> ; No output of sensor with output-number X
'!' 'KX,A1' <#13> ; Output of sensor with output-number X
Sensor attenuation for turn sensor on / off
'!' 'KX,M0' <#13> ; Sensor with output-number X is not attenuated
'!' 'KX,M1' <#13> ; Sensor with output-number X is attenuated