EPOX ET106 Series Instrukcja Użytkownika Pobierz pdf (Strona 5)

Page 5

Our 2002 price list includes a new cel-

lular modem/transceiver, the Raven II.

Manufactured by AirLink, the Raven II is

a full-duplex unit that supports telecom-

munications via a cellular digital packet

data (CDPD) network. CDPD modems

are IP based, requiring an Internet address

assigned by your service provider. By

using the Internet to access your modem,

you can eliminate long distance charges

and dial-up time, pay for data throughput

instead of airtime, and realize faster data

throughput. Operating costs, initial

equipment investment, and current drain

are lower than analog cellular systems.

The Raven II is a rugged, lightweight

modem that operates over -30° to +70°C

and 5% to 95% RH. The data transmis-

sion rate is up to 19.2 Kbps via TCP/IP.

Dialing delays are not required, allowing

quick response for data communication.

Built-in encryption maintains security of

the data while transmitting.

The Raven II is a 600 mW modem

with a typical current drain of 50 mA

while receiving and 280 mA during trans-

mission. A power cable included with the

modem connects to the datalogger's 12 V

or switched 12 V terminal. Connection to

the switched 12 V terminal allows the dat-

alogger to switch power to the modem

during scheduled transmission intervals,

thereby conserving power. If this method

is used, the modem can be powered with

a BP12 battery and an MSX10 solar

panel.

Components required are a Campbell

Scientific datalogger, serial interface,

Raven II modem, antenna, power supply,

environmental enclosure, and instrument

mount. Two antennas are available: a

compact 2 dB whip antenna and an 8 dB

Yagi antenna. If the site is near the edge

of the CDPD coverage, you may need the

Yagi. Contact your local cellular compa-

ny to verify CDPD service is available at

your site.

The CSBUOY is a wireless, floating,

self-contained package that can be

deployed with a minimal amount of setup.

It offers a fish farmer or water resource

manager the ability to monitor critical

water quality parameters from the conve-

nience of their office.

The CSBUOY monitor/transmitter is

housed in a protective polyurethane buoy.

It is powered by a 7 Ahr, 12 Vdc

rechargeable battery continuously charged

by a 5 W solar panel mounted on the

buoy. Deployed anywhere in the pond,

the CSBUOY transmits data back to the

pond-side monitoring and control system

via spread spectrum radio, thus eliminat-

ing the cost and inconvenience of burying

cable. In typical applications, the

CSBUOY can transmit up to three miles.

Where greater distances are needed, a

higher gain 3 dB antenna with a clear

line-of-site can transmit over 10 miles.

This wireless method also allows the

option of moving the buoy from pond

to pond. Two CSBUOY models are

available.

The CSBUOY-DT is preprogrammed

and includes water temperature and dis-

solved oxygen probes. An agitator brush

attached to the dissolved oxygen probe

cleans the membrane to eliminate biologi-

cal fouling.

The CSBUOY-NS is a platform with-

out probes. A variety of water quality

probes, including SDI-12 models, are

compatible with this buoy. Custom pro-

gramming is required.

New infra-red

sensor measures

temperatures

Automate leaf and soil surface tempera-

ture measurements using the compact

IRTS-P. (Inset photos show recessed

lens and mount.)

By Bruce Bugbee

Apogee Instruments, Inc.

Accurate measurement of leaf

and soil surface temperature has

long been important to plant and

soil scientists. Infra-red thermome-

ters make this measurement based

on the emitted radiation from the

surface of an object. The unique,

self-powered Precision Infra-red

Thermocouple Sensor (IRTS-P)

from Apogee Instruments measures

emitted radiation and provides the

surface temperatures as a type-K

thermocouple output. The detector

is custom built for Apogee by

Exergen Corporation. The detector

is modified to improve measure-

ment accuracy with Campbell

Scientific dataloggers. An alumi-

num body stabilizes the reference

temperature, and a second thermo-

couple output measures sensor body

temperature.

Accuracy is further enhanced by

the precision thermocouple mea-

surements that can be made with

Campbell Scientific dataloggers.

Each sensor is supplied with a 12-

instruction datalogger program that

adjusts for the effect of sensor body

temperature on target temperature.

The sensor is designed to make

continuous measurements in field

conditions. A threaded hole facili-

tates mounting to a standard camera

tripod or weather station tower.

Complete specifications are

available at www.apogee-inst.com

Cellular modem efficient, rugged

CSBUOY: Floating data, minimal setup

Access new Raven II via the Internet

The Raven II allows you to shift from

analog to digital cellular technology.

Completely self-contained, the CSBUOY mea-

sures water quality parameters in fresh water.

1 2 3 4 5 6 7 8

Komentarze do niniejszej Instrukcji

Brak uwag

EPOX ET106 Series Instrukcja Użytkownika Strona 5

Komentarze do niniejszej Instrukcji