Weather Station
Reliable information of wind movements is a critical
requirement for air quality management. Polluting
gases and particulates released from elevated
industrial stacks disperse by a variety of mechanisms
and by the time the pollutants reach the ground level
their concentrations are reduced to a fraction of the
emitted levels. The extent of dispersion and the
resultant ground level concentrations (GLCs) depend
upon local meteorological parameters like wind
speed, wind direction, atmospheric turbulence or
stability and the mixing height. Clearly, an objective
assessment of GLCs and its likely impact on the local
environment can only be made after obtaining
reliable local wind data.
Mathematical modeling to predict air-quality
implications is also becoming a vital tool to select
appropriate development policies, project sites,
green belts and buffer zones etc. Such predictions of
likely ground-level concentrations would also be
The WM280 is the fifth generation of wind monitoring systems
produced by Envirotech and incorporates many of the wishes &
desires of our esteemed customers.
Unlimited Data Memory: To obtain meaningful trends Met Data
is required for at least a season and often for a full year. Users
of earlier models of Wind Monitoring systems felt constrained by
the limited data memory of the Data-Logging equipment. The
new WM280 incorporates a 8 GB non-volatile flash storage
providing more than enough memory capacity for more than a
year’s data at 1 min intervals. However, in order to keep file
sizes within manageable limits the system automatically starts
up data storage in a new file at a preset data limit. Software
provided with the WM280 allows the user to merge files to obtain
a single file for the full season.
needed from existing industries seeking clearance for expansion and /or process change. No air quality or pollutantdispersion modeling is possible without reliable information on the local wind trends and stability conditions at different times of the day and seasons of the year. Envirotech Wind Monitoring Systems have been used for past several years all over the country by consultants, industry and researchers to generate micrometeorological data. Feedback from this large body of users has often led to system upgrades.
Features
• USB Flash Storage of 8 GB
provides sufficient
memory for data of more
• Programmable recording
interval od 1 min to 60
minutes
• New Battery backed
power-pack with optional
Solar Panel charger
enables operation in
open fields
• Reduced power
consumption
Data Transfer to a USB Memory Stick: The new WM280 system
allows data transfer to a USB Memory Stick so you do not have to bring the system to a PC for data
transfer and long-term storage. For details on the COPY COMMAND see the section on operating
instructions. It may be noted that when you copy data to an external drive it does not erase the
data from internal memory of the system.
Programmable Averaging Time: With increased memory capacity the new WM280 can also be
configured for short averaging times from 1 minute to 60 minutes. So, users can now record short
duration peaks and use the system software to determine long-term averages and trends. All sensor
values are checked by the system at ONE second intervals. These values are then used to compute
averages as per the recording interval selected by the user.
New Power Pack: User of the WM271 have appreciated the utility of its in-built rechargeable battery
power pack. Electronics of the new WM280 has further reduced current consumption and uses a very
compact NI-MH battery designed to keep the entire system operational for at least 16 hours without
mains power. An optional Solar panel-based charger is available which makes it possible to operate
the WM280 in open terrain completely without dependence on mains power.
MIN, MAX and Average values recorded for several parameters: Besides Average values the WM280
system records MIN, MAX values for the following parameters: Ambient Temperature, Humidity,
Wind Speed. This enables the user to get information on MAX / MIN Temperature or peak Wind Speed
during periods of stormy weather.
Vector Averaging for Wind Speed & Direction: The
new WM280 system treats wind movement as a VECTOR
as it truly should be. So while computing averages (over
the selected recording interval) the WIND SPEED and
DIRECTION are related as the magnitude and direction
of a WIND VECTOR and mathematically averaged. This
implies that if the wind speed is actually ZERO (calm
conditions) for a period of time the Direction
automatically gets computed to ZERO (North Direction).
It may be noted that during periods of calm one cannot
really ascribe any direction to the minor wind
movement / turbulence.
New Met Log Software: Data from Wind Monitoring systems is invariably transferred to a PC for
long-term storage and trend analysis. With the new WM280 transfer of data is easily accomplished
via a USB pen drive. Data files of the new system can be directly opened in MS Excel for trend
analysis.
Diurnal Trends: Most met parameters show a distinct diurnal behavior. The new Software provides
a powerful graph plotting utility that helps to analyze typical Temperature / RH, Solar Radiation
data and spot diurnal trends. The system allows simultaneous plots of different parameters making
it easy to identify co-relations.
Windrose Diagrams: Perhaps the most important
use of Envirotech’s software will be to plot
Windrose Diagrams. The Software provided with the
WM280 generates colored Windrose in the standard
format as shown. User selectable color schemes and
a save option has been provided so that the
diagrams can be easily incorporated in reports and
presentations. Moreover, as Met log works through
Windows you have complete freedom to use any
Laser/ Inkjet printer supported by the Print
Manager of your operating system.
Using commercially available remote desktop
viewing software one can configure live viewing
over TCP/IP or Internet
The software also supports simultaneous viewing of
graphs and reports for scientific analysis
Technical Specifications:
Sensors Supported:
• Wind Speed – Envirotech WS-10 sensor based on Three cup Anemometer with Optical
sensing and having range of 0-100 Km/hr with accuracy of (+/-) 0.5 m/sec, Material – powder
coated aluminium
• Wind Direction – Envirotech WD10 based on the principle of Potentiometer with SS
shaft, having range 0-360 degrees mechanical & 0-355 degrees electrical, with 1 degree
resolution, accuracy (+/-) 3 degrees, Material – powder coated aluminium
• Combined Temperature & RH – Envirotech WT10 having range 0 to 60 degree Celsius
AT with resolution of 0.1 C, accuracy of (+/-) 0.2 degree and RH Sensor based on solid state
thin film capacitor technique, having range of 0 to 100% RH with 0.1% resolution, accuracy
(+/-) 3% at response time < 15 sec.
• Solar Radiation – Li-Cor, USA make Solar Radiation Sensor based on Silicone Photodiode
technique, having range 0-1800 W/m2 & accuracy +/- 5%, resolution – 0.1 W/m2
• Rainfall/Precipitation – Envirotech RF10 based on principle of Tipping Bucket having
range 0 to 50 mm/hr with 0.5 mm resolution, accuracy 1 mm of Rainfall.
• Barometric Pressure – Met One, USA Barometric Pressure Sensor , Range 700-1200 mBar
with resolution of 0.1 mBar & accuracy of (+/-) 1%
Power Requirement:
The WM 280 is powered by a Rechargeable Ni-MH battery pack that can keep
the system operating for about 16 hours. The standard system is supplied
with a mains power based charger. An optional Solar Panel based charger
making you completely independent of mains power can be provided as an
optional extra.
Robust Design :
The WM 280 is specially designed to be used on table tops or mounted on a
pole for a continuous stand-alone outdoor operation. The system can work
up to ambient temperatures of 50°C without need for air-conditioning.Robust Design : The WM 280 is specially designed to be used on table tops or mounted on a
pole for a continuous stand-alone outdoor operation. The system can work
up to ambient temperatures of 50°C without need for air-conditioning.
rad@acsgsystems.com 5th floor, Neta ji subhas place Pitampura, New Delhi – 110 034, India. Mob : 91-9266207215, 9599016849 E-mail : rad@acsgsystems.com; info@acsgsystems.com www.acsgsystems.com