Why use a data logger ?

 How to operate a data logger?

 How to know more about the 無og range of data logger?

 Memory capacity
 Recording duration





Why use a data logger ?

Measuring - Recording.

When you measure with a meter you only know what happens when you are present and you have no written record of what you have measured.
When recording you will have written results on a long period.

What is a Data Logger ?

A data logger is best compared to a "black box" as used on planes.
It is a small box with a large memory and measuring input circuits. Measures are taken automatically and stored in memory. When memory is full, or earlier if wanted, the whole memory is read by a PC and processed. It is in fact this PC software program that produces the records in form of diagrams, lists of measures and EXCEL files for easy reports writing.

Data logger and Old paper chart recorders.

Since ages paper chart recorders have been used for logging. Data loggers have tremendous advantages against chart recorders : precision, zooms, recording security, dimension, self powered, roughness, global costs, records ready for computer processing, etc….With a portable PC a data logger shows even real time graphics.

How to operate a data logger?

User friendly WINDOWS software enables most computer users to run Configuration and Processing procedures without any special training.

Logger configuration or set up.

To start logging you have first to put into the logger all instruction defining this particular run.
You can give an identification name to the results, fix logging start and stop, define desired recording interval and some other useful specification.
Configuration is done by connecting logger to a PC with the "PC cable" and filling in the "configuration screen". Logger is then disconnected from PC and placed in logging position with signals to be logged connected to logger inputs.

Logger reading or off-load.

When logging ends, logger is again connected to PC and all logger memory content is transferred into PC memory.

Recordings processing

Off loaded data are shown directly as a diagram on the screen. The diagram can be "zoomed", displayed channels can be chosen and logged values can be displayed.
Recordings may be saved as binary files or as text files for import into EXCEL. produce diagram and report prints.

Real time readings and modem connectivity.

Connected to a PC, the data logger can provide for real time readings of the logged measures. When modem connectivity is provided the remote data logger can be down loaded from a central office implementing an active graphic real time supervision.

How to know more about the 無og range of data logger?

The 無og data logger family is the result of a.b.i. data years long experience acquired in data logger field. The main features aimed in this development are miniaturization, reliability, user friendliness and price for value.

The range covers specialized loggers ( CL200, PL300 and TL500 ) and loggers for general application (DL100, DL400C, DL400E and FL600 ).

Specialized loggers are proposed for electricity distribution -recording currents in cables and transformers - for water distribution - pressure and flow recording in pipes - and for air conditioning, food industry and storage.

Loggers for general use are recording physical parameters like temperature pressure, flow rate, level, concentration, potentials, etc… with transducers delivering analog signals (0-1V, 4-20mA, etc…) or digital signals (logic states or counting pulses).

無og Applications : to visualize 5 typical applications and two dozen of general application ideas.

無og Software and General Features : to have a summary of technical and operational features

無og Products : to visualize each type of logger and have a print out or of each individual data sheet. To skim through the 無og Brochure and print it.

無og News : to learn about the latest developed product.

Data logger vocabulary.

Interval : is the time space between two recorded readings. If interval is set to 15 sec the logger will take a measure every 15 seconds (on each recording channel) and store it in memory.

Inputs : it differs from logger to logger, some have voltage or current inputs other digital state or pulse inputs. Some other loggers connect directly to temperature sensors or current transducer clamps.

Channels : loggers with more than one input are called multi channel loggers ; each input corresponds normally to a channel.

Memory capacity : best specified in number of stored measurements or readings. Memory has to be shared equally by the different channels. Dynamic memory allocation means that memory has only to share between the activated channels.

Autonomy : A data logger is self powered by a long life battery. So one has not to provide external power to operate it. The autonomy, in years, depends on the battery size, logging intensity (channel number, interval) and electronic circuits design.
In a way the autonomy of a data logger is also limited by its memory size.

Resolution : is the smallest possible recorded jump when the measured value varies.

Precision : should be understood as the total precision of the recorded value (including resolution ).

Recording duration : Total time a data logger can record. It depends of course on memory size, interval and (active) channel number. When recording duration is insufficient the logger memory can be configured in FIFO, last records overwriting the oldest ones; the logger never stops logging.




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