DATA LOGGERS AND DATA ACQUISITION SYSTEM

 

DATA LOGGERS AND DATA ACQUISITION SYSTEM

 

Graphtec  Data Logger provides testing and measurement equipment for a wide range of real-world physical measurement applications. The primary advantage of using data loggers is the ability to automatically collect data on an hourly or daily basis. This allows a comprehensive, accurate picture of environmental conditions to be monitored. Can be used as temperature, voltage, humidity, etc. The Graphtec data logger, being battery-powered and portable, is equipped with a microprocessor that stores all sensor data in internal memory for storage. It counts counts including proprietary sensors and transducers to record temperature, humidity, single and three-phase power usage, CO2, mV, Ma, voltage, RPM, torque, pulses, or timestamp analysis of actual sensor data. Can monitor parameters. We are temperature data logger and data logger supplier, dealer and distributor all over India at very budgetary price range. We are dealing with multi-channel data acquisition systems in India.

Technically, a data logger is any device that can be used to store data. This includes many data acquisition devices such as plug-in boards or serial communication systems that use computers as real-time data recording systems. Nowadays, wireless transmitters are capable of turning a regular smart phone (or tablet) into a mobile data logger.

 

Most device manufacturers, however, consider a datalogger to be a stand-alone device that can read a variety of electrical signals and store the data in internal memory for later downloading to a computer.

 

The advantage of data loggers is that they can operate independently of a computer, unlike many other types of data acquisition devices. Data loggers are available in various shapes and sizes. The range includes simple affordable single channel fixed function loggers capable of handling hundreds of inputs for more powerful programmable devices.

When choosing a data logger the following parameters should be considered.

Input Signal

OMEGA offers data loggers that are compatible with most types of signals. Some data loggers are dedicated to a certain input type while others are programmable for different types of inputs. OMEGA offers a wide range of data loggers for several types of signals, including thermocouple, sound, pH, pressure and many more (see the "Types of Signal" for a list).

Number of Inputs

Data Loggers are available in both single and multi-channel designs. A 32 channels data logger such as OMEGA OM-SQ2040 Series is capable of handling multiple inputs.

Size

In many applications space is a limitation. In those cases the size of the data logger may be a critical selection parameter. OMEGA's OM-CP family of data loggers are extremely compact and include models for most input types.

Speed/Memory

In comparison to real time data acquisition systems, data loggers generally have low sample rates. This is normally because they store data in internal memory which is limited. The higher the data rates the more memory required. Therefore when specifying a data logger it is important to determine the sample rate and the sample duration which can be used to calculate the required memory. For example. If an application requires sample rates of 1 per second and the test must last one hour, the data logger must be able to store 3600 samples(1 sample/sec x 1 hour x 3600 seconds/hour).

Real Time Operation

In some applications it may be desirable to display the data being collected in real time on a computer. Certain data loggers such as OMEGA's OM-CP family support this feature.

Why Choose a Data Logger Over Other Types of Data Collection Instruments?

Three types of instruments are commonly used for collecting and storing data. They are 1)Real-Time Data Acquisition Systems, 2)Chart Recorders and 3)Data Loggers.

Data loggers are normally more economical than chart recorders. They offer more flexibility and are available with a greater variety of input types. Most data loggers collect data which may be directly transferred to a computer. Although this option is available with some recorders, it normally adds significant expense to the recorder price.

Data acquisition systems offer a great deal of flexibility and are certainly attractive when high sample rates are required, however, since they require connection or installation into a computer, the computer must also be present and active when collecting the data. Data loggers can collect data independently of a computer. Data is normally collected in non-volatile memory for later download to a computer. The computer does not need to be present during the data collection process. This makes them ideally suited for applications requiring portability.