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What is data logger ?

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What is data logger  ?

 

A data logger is an electronic instrument that takes measurements from sensors and stores those results for later use.

Some commonly used measurements include temperature, pressure, current, velocity, tension, displacement, and several other physical quantities.
 


Principles of data loggers

 

Data loggers and sensors work together to convert physical quantities and excitation signals to be measured into electrical signals such as voltage and current.

These electrical signals are then converted or digitized into binary data. Binary data is very easy to be analyzed by software and stored on the hard disk of a PC or other storage media such as memory cards and CD-ROMs.

Some components that every data logger must contain:


Hardware equipment used to digitize recorded signals, including sensors, signal conditioning equipment, and analog-to-digital conversion hardware.

Long-term data storage device, typically PC data logging software, used for data acquisition, analysis and presentation A recorder is an instrument that converts the process of changing one or more variables over time or another variable into a signal that can be identified and read .

It can save the recorded signal changes for analysis and processing. The biggest feature of the recorder is that it can automatically record the slow change process and transient level change process of periodic or aperiodic multi-channel signals.

According to the types of input and output signals, recorders can be divided into analog-digital, digital-analog, analog-analog, digital-digital and other forms, and their main circuits are different according to the different output forms.

When the output is a digital signal, its main circuit is a memory circuit that can store digital information. It can send the digital signal to a tape machine, punching machine or other equipment at any time, or observe the analog waveform with an oscilloscope after appropriate transformation, such as digital memory and waveform memory.

When the output is an analog signal, the main circuit of the recorder is an analog amplifying drive circuit without a storage function. The signal must be recorded on paper, photosensitive film or magnetic tape with an appropriate recording device and method immediately in order to save the information and facilitate further analysis and processing. Such as various recorders, light recorders, plotters, tape recorders, etc.

There are two main types of analog circuits, namely the direct amplification drive type, such as a pen recorder, and an automatic balance type, such as a plotter or an X-Y recorder.

The main technical indicators of the recorder are operating frequency, dynamic range of input signal, recording linearity, resolution, distortion, response time, paper feeding accuracy and stability. Complex circuits and mechanisms are also required for tape drives used as computer peripherals


Steps for usage

 

Follow these steps when using the data logger:

 

1. Connect sensors to data loggers such as thermocouples, RTDs, thermistors, strain gauges and accelerometers;

 

2. Use the data logging software to configure your data logger;

 

3. Use the data logging software to configure your data logging task parameters such as sampling rate, early warning, start and stop conditions, etc.;

 

4. Run data logging tasks;

 

5. After the hardware digitizes your sensor measurements, analyze and store the data for later use.

 

Besides logging data, what can a data logger do?

 

From the name, the main purpose of the data logger is to store the data measured by the sensor for future use.

But a data logging application usually requires more than just data collection and storage. You will inevitably need to analyze and represent data to understand measurements and make decisions based on recorded data.

A complete data logging application generally requires most of the elements listed below.


USB data logger cable CAB-0005-USB
USB Tinytag Offload Cable 3.5mm Jack Plug
USB Programming Cable for Sound Level Meter Data Logger
USB cable for configuring and downloading Transit, Talk and CO2 loggers


CAB-0007-USB-RS USB cable for Tinytag data loggers 
 


DB9 

USB Cable Connect to RS232 cable 9-pin plug

USB Cable for Temperature Humidity Data Logger

Interface Cable for Escort Temperature Data Logger
 
Telog Instruments Data Transfer Cable for Data Logger HPR Series USB to Serial Port 
  
Mini Din

USB Interface Cable for ThermaData Lite Data Logger

USB RS232 serial Cable for ThermaData Lite Data Logger


M12

USB cable for GP2 Data Logger

M12 to USB cable FTDI chip for GP2 Data Logger
 

 


 

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