products

By: Microedge Instruments  09-12-2011
Keywords: Data Acquisition, Remote Access, Data Logger

Data Loggers

Features:

16-bit analog-to-digital converter

4 mega-byte memory size

Plug & Play USB communications and serial port with auto baud rate of up to 115 kbps

Up to over 10 years of battery life

Powerful software for logger configuration, data downloading, plotting, analysis and alarm reporting

Configurable Alarm Control/Excitation Controls

Wide sampling interval Selections (20 milliseconds to 12 hours)

Rugged aluminum enclosure

Coated PCB to protect against moisture, corrosion and mildew

Softwares

SiteView works with Site-Log series data loggers for data downloading, analysis and plotting.

Features:

Support USB, Serial port and Ethernet connections for easy local and remote access

Fast communication speed of up to 115200 bps makes downloading fast

Real-time view and chart recording replaces chart recording device

Custom equation and custom-line equation solves scientific and laboratory algorithm difficulties

Zoom-in/zoom-out, annotation/label of plotting functions provide detailed views of data

Multiple file loading allows for easy data comparison.

Dynamic statistics provides detailed information of current zoomed view

Accessories

Access remote data logger via Ethernet connection

Monitor field environment remotely and lively

Receive alarm notification instantly

Conver serial communication TTL level to RS232 level. Work with host device needs to communicate with Site-Log data logger via RS232 serial communicaitons.

A data logger is an electronic or battery-powered instrument that records environmental conditions such as temperature, relative humidity, and light levels over periods of time. Data loggers are connected to a computer terminal and proprietary software is used to download the recorded data and produce needed reports. One of the primary benefits of using data loggers is the ability to automatically collect data on a 24-hour basis. Upon activation, data loggers are typically deployed and left unattended to measure and record information for the duration of the monitoring period. This allows for a comprehensive and accurate picture of the environmental conditions being monitored, such as air temperature, and relative humidity.

Data loggers typically have slower sample rates. A maximum sample rate of 1 Hz is a speed that may be considered to be very fast for a data logger, yet very slow for a typical data acquisition system. Data loggers are implicitly stand-alone devices, whereas a typical data acquisition system must remain tethered to a computer to acquire data. This stand-alone aspect of data loggers implies on-board memory that is used to store acquired data. Sometimes this memory is very large so it can accommodate many days, or even months, of unattended recording. This memory may be either a battery-backed static random access memory, flash memory, or EEPROM. Given the extended recording times of data loggers, they typically feature a time- and date-stamping mechanism to ensure that each recorded data value is associated with the date and time of acquisition. As such, data loggers typically employ built-in real-time clocks whose published drift can be an important consideration when choosing between data loggers. Data loggers range from simple single-channel input devices to complex multi-channel instruments. Typically, the simpler the device is, the less programming flexibility it has. Some more sophisticated instruments allow for cross-channel computations and alarms based on predetermined conditions. The newest of data loggers can even serve web pages, allowing numerous people to monitor a system remotely. The unattended and remote nature of many data logger applications implies the need in some applications to operate from a DC power source, such as a battery. Solar power may be used to supplement these power sources. These constraints have generally led to ensure that the devices they market are extremely power efficient relative to computers. In many cases they are required to operate in harsh environmental conditions where computers will not function reliably. This unattended nature also dictates that data loggers must be extremely reliable. Reliability is a necessity since they may operate for long periods nonstop with little or no human supervision, and may be installed in harsh or remote locations. It is also imperative that as long as they have power, they do not fail to log data for any reason. Manufacturers go to great lengths to ensure that the devices can be depended on in these applications. As such dataloggers are almost completely immune to the problems that might affect a general-purpose computer in the same application, such as program crashes and the instability of some operating systems.

Keywords: Data Acquisition, Data Logger, Data Loggers, Remote Access