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Full-Size Data Loggers

Introduction

A complete data acquisition system consists of data logger components, data retrieval components, and software components.

Data Logger Components

Data Loggers: Campbell Scientific data loggers are known for their field reliability and offer compatibility with a wide range of sensors and data retrieval options.

A single data logger can read a large number of sensors provided they are concentrated into a small area. Additional loggers should be deployed if sensors are distributed over a wide area. This keeps signal cables short, reduces problems with noise, and minimizes the potential for damage from construction activities and electrical transients. Cost savings on cable can sometimes pay for the additional loggers.

Interface Modules: Certain types of sensors require additional interfaces. For example, vibrating wire sensors require a VW interface, which is connected between the data logger and a multiplexer.

Multiplexers: Multiplexers increase the number of sensors that can be monitored by a data logger. For example, the CR1000 can control up to seven multi-plexers, each capable of handling 16 to 32 sensors. In practice, the data logger usually controls one or two multiplexers, and additional loggers and multiplexers are employed if there are more sensors.

Power Supplies: A power supply provides regulated power to the logger and sensors. Power is drawn from a battery that is charged from AC mains power or a solar panel.

Weatherproof Enclosures: All field components must be housed in weatherproof enclosures.

Data Retrieval Options

Wired Links: Wired links for data retrieval include direct connection to the PC, telephone modems, and multidrop networks. Wired links are usually less expensive and easier to set up. They are also better for real-time data retrieval.

Wireless Links: Wireless links for data retrieval include cell modems, and spread-spectrum radio modems. Wireless links are useful when distances, site traffic, or other obstacles make wired links impractical. Also, to the degree that wireless links eliminate surface runs of cable, they also reduce problems caused by electrical transients.

Software Components

Logger Control Software: LoggerNet software is used to create monitoring programs and to retrieve data from logger to PC.

Custom Programming: Slope Indicator offers custom monitoring programs for Campbell data loggers. The programs, which are created with LoggerNet and can be modified by the user, significantly reduce the time and expense required to deploy the data acquisition system.

Argus Web-Based Monitoring: Processing and distributing the data collected by data loggers can be a daunting task. Atlas Monitoring Software provides an efficient and cost-effective solution to this problem. Atlas automatically processes readings, checks for alarms, displays graphs, and generates reports. Distribution is immediate because Atlas works on the internet. Users can view and download data with their web browsers, whether they are at work, at home, at a client's office, or half-way around the world.

For more information

Please download the datasheet for the Campbell Scientific Data Loggers and Atlas Web-Based Monitoring. You can also find more information about the Campbell Scientific Data Loggers on their website.

Full-size Data Loggers Specifications

DATA LOGGER COMPONENTS
CR800 Data Logger	56700800
CR1000 Data Logger	56701000
PS100 Power Supply	56703120
AC Adapter, 90 to 260 VAC	56703124
RS-232 Interface Cable	50306869
USB Interface Cable	56704018
ENC 16/18 Enclosure	56705020
AVW200 VW Interface	56701550
AM16/32 Multiplexer	56702110
System Integration Per Logger	96700000

BASIC DATA RETRIEVAL OPTIONS
Com200 Telephone modem	56704410	The COMM200 telephone modem is designed specifically for Campbell Scientific data loggers. One modem is placed with each data logger and connected to a telephone line with a dedicated number. Communication is typically initiated by the computer which uses LoggerNet to dial the logger and retrieve the data. Real-time data transfers are possible while connected.

OTHER DATA RETRIEVAL OPTIONS
Voice Modems	Voice modems, a variation of the telephone modem, can deliver messages to preset phone numbers. Voice modems generally require extra set up time
Short Haul Modems	Short-haul modems are placed with each logger and provide a reliable real-time link between the logger and a computer. The short-haul modem transmits data up to 8 km over a four-wire cable that is routed by the user
MD9 Multidrop Interface	The MD9 is placed with each logger. A single coaxial cable links the MD9s into a network. The network can be connected to the controlling computer or to a telephone or radio modem
Cell Phone Modems	Cell phone modems are placed with each data logger. Some cell services offer IP connections to the modem, so that the long-distance portion of the transmission is carried on the internet
Spread-Spectrum Radio Modems	Spreadspectrum modems are placed with each data logger. Communication is typically initiated by the computer. Most countries do not require licenses for these modems

Software Components
LoggerNet Software	56708020	This software is require for each data logging system. It is used to write and compile monitoring programs, to transfer the program to the data logger, and to retrieve data by direct wire, modem, or radio telemetry
Custom Programming	96701000	Slope Indicator offers custom programs written in CR Basic. A typical program excites the sensors, obtains readings, and stores data at preset intervals, but it does not perform data reduction operations. Users can modify the program as needs evolve

ATLAS WEB SERVICE
Atlas Activation Fee	58851000
Atlas Monitoring Service	.58851050
Atlas is a web service with monthly plans based on the number of sensors to be monitored. The activation fee includes a partial setup of a project. Monitoring service is a monthly change and includes monitoring of 50 sensors. Additional sensors can be added for a nominal fee