Campbell RWIS STATIONS, Инструкция по эксплуатации

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RWIS Stations
Campbell Scientific RWIS stations are intended to automatically collect
weather and road information. Standard met sensors are used with surface-
specific sensors to measure additional site conditions. As with all Campbell
Scientific stations, these are configurable by the customer to their
requirements.
RWIS stations conform to national standards defined by the National
Transportation Communications for ITS Protocol (NTCIP). They have
developed standards for implementation of several aspects of RWIS. The
NTCIP guide is available at http://www.ntcip.com/library/guide.asp. The
specification that we conform to is ESS-1204. ESS (Environmental Sensor
Station) is a term that refers to the weather station.
Each station that we supply has the following components listed below.
Power enclosure for the batteries:
AC recharge
DC recharge/tripod for solar panels
Equipment enclosure:
CR10X-2M or CR1000
SDM-SIO4
NL110
Modem
In addition to the standard met sensors, there are options that add function to
the station to allow it to make road-related measurements. Some are listed
below. As with any station, if a customer needs another measurement that they
feel is appropriate, it will be added if possible.
SR50 (acoustic snow sensor)
Lufft IRS21 (road sensor – 2 ea generally)
Present weather (such as Vaisala PWD22)
Camera
107 probes for sub surface temperatures
The purpose for the instruments in the equipment enclosure doesn't need a lot
of explanation with the exception of the SDM-SIO4 and the modem.
The SDM-SIO4 is used primarily for interfacing to the IRS21. The handshake
required to communicate with the sensor doesn’t allow for operation with the
CR10X alone since four control ports are required. In addition, many of the
sensors used with this application have serial interfaces making the SDM-SIO4
a good addition to the application.
The modem used needs an RS-232 interface and also needs to be faster than the
9600 baud offered in Campbell modems. This is due to the requirement for
image retrieval from a camera. If using FTP (desired) to extract an image from
the logger, FTP shuts down before the image can be retrieved.